diff --git a/homeassistant/components/ambient_station/__init__.py b/homeassistant/components/ambient_station/__init__.py
index 7343c2d21ed..0f35cca5f08 100644
--- a/homeassistant/components/ambient_station/__init__.py
+++ b/homeassistant/components/ambient_station/__init__.py
@@ -16,6 +16,7 @@ from homeassistant.const import (
     POWER_WATT,
     SPEED_MILES_PER_HOUR,
     TEMP_FAHRENHEIT,
+    UNIT_DEGREE,
     UNIT_PERCENTAGE,
 )
 from homeassistant.core import callback
@@ -218,10 +219,10 @@ SENSOR_TYPES = {
     TYPE_TOTALRAININ: ("Lifetime Rain", "in", TYPE_SENSOR, None),
     TYPE_UV: ("uv", "Index", TYPE_SENSOR, None),
     TYPE_WEEKLYRAININ: ("Weekly Rain", "in", TYPE_SENSOR, None),
-    TYPE_WINDDIR: ("Wind Dir", "°", TYPE_SENSOR, None),
-    TYPE_WINDDIR_AVG10M: ("Wind Dir Avg 10m", "°", TYPE_SENSOR, None),
+    TYPE_WINDDIR: ("Wind Dir", UNIT_DEGREE, TYPE_SENSOR, None),
+    TYPE_WINDDIR_AVG10M: ("Wind Dir Avg 10m", UNIT_DEGREE, TYPE_SENSOR, None),
     TYPE_WINDDIR_AVG2M: ("Wind Dir Avg 2m", SPEED_MILES_PER_HOUR, TYPE_SENSOR, None),
-    TYPE_WINDGUSTDIR: ("Gust Dir", "°", TYPE_SENSOR, None),
+    TYPE_WINDGUSTDIR: ("Gust Dir", UNIT_DEGREE, TYPE_SENSOR, None),
     TYPE_WINDGUSTMPH: ("Wind Gust", SPEED_MILES_PER_HOUR, TYPE_SENSOR, None),
     TYPE_WINDSPDMPH_AVG10M: ("Wind Avg 10m", SPEED_MILES_PER_HOUR, TYPE_SENSOR, None),
     TYPE_WINDSPDMPH_AVG2M: ("Wind Avg 2m", SPEED_MILES_PER_HOUR, TYPE_SENSOR, None),
diff --git a/homeassistant/components/arwn/sensor.py b/homeassistant/components/arwn/sensor.py
index 7be5c4bfb93..334c086f8d6 100644
--- a/homeassistant/components/arwn/sensor.py
+++ b/homeassistant/components/arwn/sensor.py
@@ -3,7 +3,7 @@ import json
 import logging
 
 from homeassistant.components import mqtt
-from homeassistant.const import TEMP_CELSIUS, TEMP_FAHRENHEIT
+from homeassistant.const import TEMP_CELSIUS, TEMP_FAHRENHEIT, UNIT_DEGREE
 from homeassistant.core import callback
 from homeassistant.helpers.entity import Entity
 from homeassistant.util import slugify
@@ -45,7 +45,7 @@ def discover_sensors(topic, payload):
         return (
             ArwnSensor("Wind Speed", "speed", unit, "mdi:speedometer"),
             ArwnSensor("Wind Gust", "gust", unit, "mdi:speedometer"),
-            ArwnSensor("Wind Direction", "direction", "°", "mdi:compass"),
+            ArwnSensor("Wind Direction", "direction", UNIT_DEGREE, "mdi:compass"),
         )
 
 
diff --git a/homeassistant/components/buienradar/sensor.py b/homeassistant/components/buienradar/sensor.py
index de7dd04a48e..8ace9070f8c 100644
--- a/homeassistant/components/buienradar/sensor.py
+++ b/homeassistant/components/buienradar/sensor.py
@@ -32,6 +32,7 @@ from homeassistant.const import (
     SPEED_KILOMETERS_PER_HOUR,
     TEMP_CELSIUS,
     TIME_HOURS,
+    UNIT_DEGREE,
     UNIT_PERCENTAGE,
 )
 from homeassistant.core import callback
@@ -76,7 +77,7 @@ SENSOR_TYPES = {
     "windspeed": ["Wind speed", SPEED_KILOMETERS_PER_HOUR, "mdi:weather-windy"],
     "windforce": ["Wind force", "Bft", "mdi:weather-windy"],
     "winddirection": ["Wind direction", None, "mdi:compass-outline"],
-    "windazimuth": ["Wind direction azimuth", "°", "mdi:compass-outline"],
+    "windazimuth": ["Wind direction azimuth", UNIT_DEGREE, "mdi:compass-outline"],
     "pressure": ["Pressure", "hPa", "mdi:gauge"],
     "visibility": ["Visibility", LENGTH_KILOMETERS, None],
     "windgust": ["Wind gust", SPEED_KILOMETERS_PER_HOUR, "mdi:weather-windy"],
@@ -148,11 +149,11 @@ SENSOR_TYPES = {
     "winddirection_3d": ["Wind direction 3d", None, "mdi:compass-outline"],
     "winddirection_4d": ["Wind direction 4d", None, "mdi:compass-outline"],
     "winddirection_5d": ["Wind direction 5d", None, "mdi:compass-outline"],
-    "windazimuth_1d": ["Wind direction azimuth 1d", "°", "mdi:compass-outline"],
-    "windazimuth_2d": ["Wind direction azimuth 2d", "°", "mdi:compass-outline"],
-    "windazimuth_3d": ["Wind direction azimuth 3d", "°", "mdi:compass-outline"],
-    "windazimuth_4d": ["Wind direction azimuth 4d", "°", "mdi:compass-outline"],
-    "windazimuth_5d": ["Wind direction azimuth 5d", "°", "mdi:compass-outline"],
+    "windazimuth_1d": ["Wind direction azimuth 1d", UNIT_DEGREE, "mdi:compass-outline"],
+    "windazimuth_2d": ["Wind direction azimuth 2d", UNIT_DEGREE, "mdi:compass-outline"],
+    "windazimuth_3d": ["Wind direction azimuth 3d", UNIT_DEGREE, "mdi:compass-outline"],
+    "windazimuth_4d": ["Wind direction azimuth 4d", UNIT_DEGREE, "mdi:compass-outline"],
+    "windazimuth_5d": ["Wind direction azimuth 5d", UNIT_DEGREE, "mdi:compass-outline"],
     "condition_1d": ["Condition 1d", None, None],
     "condition_2d": ["Condition 2d", None, None],
     "condition_3d": ["Condition 3d", None, None],
diff --git a/homeassistant/components/darksky/sensor.py b/homeassistant/components/darksky/sensor.py
index d372811edd8..e4471b7e55f 100644
--- a/homeassistant/components/darksky/sensor.py
+++ b/homeassistant/components/darksky/sensor.py
@@ -22,6 +22,7 @@ from homeassistant.const import (
     TEMP_CELSIUS,
     TEMP_FAHRENHEIT,
     TIME_HOURS,
+    UNIT_DEGREE,
     UNIT_PERCENTAGE,
     UNIT_UV_INDEX,
 )
@@ -87,11 +88,11 @@ SENSOR_TYPES = {
     ],
     "nearest_storm_bearing": [
         "Nearest Storm Bearing",
-        "°",
-        "°",
-        "°",
-        "°",
-        "°",
+        UNIT_DEGREE,
+        UNIT_DEGREE,
+        UNIT_DEGREE,
+        UNIT_DEGREE,
+        UNIT_DEGREE,
         "mdi:weather-lightning",
         ["currently"],
     ],
@@ -177,11 +178,11 @@ SENSOR_TYPES = {
     ],
     "wind_bearing": [
         "Wind Bearing",
-        "°",
-        "°",
-        "°",
-        "°",
-        "°",
+        UNIT_DEGREE,
+        UNIT_DEGREE,
+        UNIT_DEGREE,
+        UNIT_DEGREE,
+        UNIT_DEGREE,
         "mdi:compass",
         ["currently", "hourly", "daily"],
     ],
diff --git a/homeassistant/components/homematic/sensor.py b/homeassistant/components/homematic/sensor.py
index d36b05fd129..13e49bcf509 100644
--- a/homeassistant/components/homematic/sensor.py
+++ b/homeassistant/components/homematic/sensor.py
@@ -10,6 +10,7 @@ from homeassistant.const import (
     POWER_WATT,
     SPEED_KILOMETERS_PER_HOUR,
     TEMP_CELSIUS,
+    UNIT_DEGREE,
     UNIT_PERCENTAGE,
     UNIT_VOLT,
     VOLUME_CUBIC_METERS,
@@ -53,8 +54,8 @@ HM_UNIT_HA_CAST = {
     "HIGHEST_ILLUMINATION": "lx",
     "RAIN_COUNTER": "mm",
     "WIND_SPEED": SPEED_KILOMETERS_PER_HOUR,
-    "WIND_DIRECTION": "°",
-    "WIND_DIRECTION_RANGE": "°",
+    "WIND_DIRECTION": UNIT_DEGREE,
+    "WIND_DIRECTION_RANGE": UNIT_DEGREE,
     "SUNSHINEDURATION": "#",
     "AIR_PRESSURE": "hPa",
     "FREQUENCY": "Hz",
diff --git a/homeassistant/components/isy994/sensor.py b/homeassistant/components/isy994/sensor.py
index a52dcdbe09a..d3a889902f5 100644
--- a/homeassistant/components/isy994/sensor.py
+++ b/homeassistant/components/isy994/sensor.py
@@ -19,6 +19,7 @@ from homeassistant.const import (
     TIME_MONTHS,
     TIME_SECONDS,
     TIME_YEARS,
+    UNIT_DEGREE,
     UNIT_PERCENTAGE,
     UNIT_UV_INDEX,
     UNIT_VOLT,
@@ -41,7 +42,7 @@ UOM_FRIENDLY_NAME = {
     "10": TIME_DAYS,
     "12": "dB",
     "13": "dB A",
-    "14": "°",
+    "14": UNIT_DEGREE,
     "16": "macroseismic",
     "17": TEMP_FAHRENHEIT,
     "18": "ft",
@@ -97,7 +98,7 @@ UOM_FRIENDLY_NAME = {
     "73": POWER_WATT,
     "74": f"{POWER_WATT}/m²",
     "75": "weekday",
-    "76": "Wind Direction (°)",
+    "76": f"Wind Direction ({UNIT_DEGREE})",
     "77": TIME_YEARS,
     "82": "mm",
     "83": LENGTH_KILOMETERS,
@@ -107,8 +108,8 @@ UOM_FRIENDLY_NAME = {
     "88": "Water activity",
     "89": "RPM",
     "90": "Hz",
-    "91": "° (Relative to North)",
-    "92": "° (Relative to South)",
+    "91": f"{UNIT_DEGREE} (Relative to North)",
+    "92": f"{UNIT_DEGREE} (Relative to South)",
 }
 
 UOM_TO_STATES = {
diff --git a/homeassistant/components/lcn/const.py b/homeassistant/components/lcn/const.py
index 7a881ab9d85..817b6821db1 100644
--- a/homeassistant/components/lcn/const.py
+++ b/homeassistant/components/lcn/const.py
@@ -4,6 +4,8 @@ from itertools import product
 from homeassistant.const import (
     TEMP_CELSIUS,
     TEMP_FAHRENHEIT,
+    TEMP_KELVIN,
+    UNIT_DEGREE,
     UNIT_PERCENTAGE,
     UNIT_VOLT,
 )
@@ -149,7 +151,7 @@ VAR_UNITS = [
     "LCN",
     "NATIVE",
     TEMP_CELSIUS,
-    "°K",
+    TEMP_KELVIN,
     TEMP_FAHRENHEIT,
     "LUX_T",
     "LX_T",
@@ -167,7 +169,7 @@ VAR_UNITS = [
     "AMP",
     "A",
     "DEGREE",
-    "°",
+    UNIT_DEGREE,
 ]
 
 RELVARREF = ["CURRENT", "PROG"]
diff --git a/homeassistant/components/mysensors/sensor.py b/homeassistant/components/mysensors/sensor.py
index 16c8d37f447..ac16198ee69 100644
--- a/homeassistant/components/mysensors/sensor.py
+++ b/homeassistant/components/mysensors/sensor.py
@@ -7,6 +7,7 @@ from homeassistant.const import (
     POWER_WATT,
     TEMP_CELSIUS,
     TEMP_FAHRENHEIT,
+    UNIT_DEGREE,
     UNIT_PERCENTAGE,
     UNIT_VOLT,
 )
@@ -22,7 +23,7 @@ SENSORS = {
     "V_RAINRATE": [None, "mdi:weather-rainy"],
     "V_WIND": [None, "mdi:weather-windy"],
     "V_GUST": [None, "mdi:weather-windy"],
-    "V_DIRECTION": ["°", "mdi:compass"],
+    "V_DIRECTION": [UNIT_DEGREE, "mdi:compass"],
     "V_WEIGHT": [MASS_KILOGRAMS, "mdi:weight-kilogram"],
     "V_DISTANCE": ["m", "mdi:ruler"],
     "V_IMPEDANCE": ["ohm", None],
diff --git a/homeassistant/components/openweathermap/sensor.py b/homeassistant/components/openweathermap/sensor.py
index ac85eff6794..b5b9aa25e47 100644
--- a/homeassistant/components/openweathermap/sensor.py
+++ b/homeassistant/components/openweathermap/sensor.py
@@ -15,6 +15,7 @@ from homeassistant.const import (
     SPEED_METERS_PER_SECOND,
     TEMP_CELSIUS,
     TEMP_FAHRENHEIT,
+    UNIT_DEGREE,
     UNIT_PERCENTAGE,
 )
 import homeassistant.helpers.config_validation as cv
@@ -36,7 +37,7 @@ SENSOR_TYPES = {
     "weather": ["Condition", None],
     "temperature": ["Temperature", None],
     "wind_speed": ["Wind speed", SPEED_METERS_PER_SECOND],
-    "wind_bearing": ["Wind bearing", "°"],
+    "wind_bearing": ["Wind bearing", UNIT_DEGREE],
     "humidity": ["Humidity", UNIT_PERCENTAGE],
     "pressure": ["Pressure", "mbar"],
     "clouds": ["Cloud coverage", UNIT_PERCENTAGE],
diff --git a/homeassistant/components/smappee/sensor.py b/homeassistant/components/smappee/sensor.py
index 5948f7e4223..d82e63a2614 100644
--- a/homeassistant/components/smappee/sensor.py
+++ b/homeassistant/components/smappee/sensor.py
@@ -5,6 +5,7 @@ import logging
 from homeassistant.const import (
     ENERGY_KILO_WATT_HOUR,
     POWER_WATT,
+    UNIT_DEGREE,
     UNIT_PERCENTAGE,
     UNIT_VOLT,
     VOLUME_CUBIC_METERS,
@@ -73,7 +74,7 @@ SENSOR_TYPES = {
         "Water Sensor Temperature",
         "mdi:temperature-celsius",
         "water",
-        "°",
+        UNIT_DEGREE,
         "temperature",
     ],
     "water_sensor_humidity": [
diff --git a/homeassistant/components/torque/sensor.py b/homeassistant/components/torque/sensor.py
index fd7eddbb48a..7b7f7d7ec16 100644
--- a/homeassistant/components/torque/sensor.py
+++ b/homeassistant/components/torque/sensor.py
@@ -6,7 +6,7 @@ import voluptuous as vol
 
 from homeassistant.components.http import HomeAssistantView
 from homeassistant.components.sensor import PLATFORM_SCHEMA
-from homeassistant.const import CONF_EMAIL, CONF_NAME
+from homeassistant.const import CONF_EMAIL, CONF_NAME, UNIT_DEGREE
 from homeassistant.core import callback
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity import Entity
@@ -91,7 +91,7 @@ class TorqueReceiveDataView(HomeAssistantView):
 
                 temp_unit = data[key]
                 if "\\xC2\\xB0" in temp_unit:
-                    temp_unit = temp_unit.replace("\\xC2\\xB0", "°")
+                    temp_unit = temp_unit.replace("\\xC2\\xB0", UNIT_DEGREE)
 
                 units[pid] = temp_unit
             elif is_value:
diff --git a/homeassistant/components/trafikverket_weatherstation/sensor.py b/homeassistant/components/trafikverket_weatherstation/sensor.py
index f2e7387aa6b..6c678ab732c 100644
--- a/homeassistant/components/trafikverket_weatherstation/sensor.py
+++ b/homeassistant/components/trafikverket_weatherstation/sensor.py
@@ -18,6 +18,7 @@ from homeassistant.const import (
     DEVICE_CLASS_TEMPERATURE,
     SPEED_METERS_PER_SECOND,
     TEMP_CELSIUS,
+    UNIT_DEGREE,
     UNIT_PERCENTAGE,
 )
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
@@ -61,7 +62,7 @@ SENSOR_TYPES = {
     ],
     "wind_direction": [
         "Wind direction",
-        "°",
+        UNIT_DEGREE,
         "winddirection",
         "mdi:flag-triangle",
         None,
diff --git a/homeassistant/components/wink/sensor.py b/homeassistant/components/wink/sensor.py
index 2d0313ec211..1d2339702ad 100644
--- a/homeassistant/components/wink/sensor.py
+++ b/homeassistant/components/wink/sensor.py
@@ -3,7 +3,7 @@ import logging
 
 import pywink
 
-from homeassistant.const import TEMP_CELSIUS
+from homeassistant.const import TEMP_CELSIUS, UNIT_DEGREE
 
 from . import DOMAIN, WinkDevice
 
@@ -48,7 +48,7 @@ class WinkSensorDevice(WinkDevice):
         """Initialize the Wink device."""
         super().__init__(wink, hass)
         self.capability = self.wink.capability()
-        if self.wink.unit() == "°":
+        if self.wink.unit() == UNIT_DEGREE:
             self._unit_of_measurement = TEMP_CELSIUS
         else:
             self._unit_of_measurement = self.wink.unit()
diff --git a/homeassistant/components/wunderground/sensor.py b/homeassistant/components/wunderground/sensor.py
index 6d843c222d9..b9532daa995 100644
--- a/homeassistant/components/wunderground/sensor.py
+++ b/homeassistant/components/wunderground/sensor.py
@@ -26,6 +26,7 @@ from homeassistant.const import (
     SPEED_MILES_PER_HOUR,
     TEMP_CELSIUS,
     TEMP_FAHRENHEIT,
+    UNIT_DEGREE,
     UNIT_PERCENTAGE,
 )
 from homeassistant.exceptions import PlatformNotReady
@@ -456,7 +457,7 @@ SENSOR_TYPES = {
     ),
     "weather": WUCurrentConditionsSensorConfig("Weather Summary", "weather", None),
     "wind_degrees": WUCurrentConditionsSensorConfig(
-        "Wind Degrees", "wind_degrees", "mdi:weather-windy", "°"
+        "Wind Degrees", "wind_degrees", "mdi:weather-windy", UNIT_DEGREE
     ),
     "wind_dir": WUCurrentConditionsSensorConfig(
         "Wind Direction", "wind_dir", "mdi:weather-windy"
diff --git a/homeassistant/components/yr/sensor.py b/homeassistant/components/yr/sensor.py
index e477f4a3c89..e648e059fab 100644
--- a/homeassistant/components/yr/sensor.py
+++ b/homeassistant/components/yr/sensor.py
@@ -24,6 +24,7 @@ from homeassistant.const import (
     PRESSURE_HPA,
     SPEED_METERS_PER_SECOND,
     TEMP_CELSIUS,
+    UNIT_DEGREE,
     UNIT_PERCENTAGE,
 )
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
@@ -47,7 +48,7 @@ SENSOR_TYPES = {
     "windSpeed": ["Wind speed", SPEED_METERS_PER_SECOND, None],
     "windGust": ["Wind gust", SPEED_METERS_PER_SECOND, None],
     "pressure": ["Pressure", PRESSURE_HPA, DEVICE_CLASS_PRESSURE],
-    "windDirection": ["Wind direction", "°", None],
+    "windDirection": ["Wind direction", UNIT_DEGREE, None],
     "humidity": ["Humidity", UNIT_PERCENTAGE, DEVICE_CLASS_HUMIDITY],
     "fog": ["Fog", UNIT_PERCENTAGE, None],
     "cloudiness": ["Cloudiness", UNIT_PERCENTAGE, None],
diff --git a/homeassistant/components/zamg/sensor.py b/homeassistant/components/zamg/sensor.py
index 0ead849b59a..6580ab0917f 100644
--- a/homeassistant/components/zamg/sensor.py
+++ b/homeassistant/components/zamg/sensor.py
@@ -19,6 +19,7 @@ from homeassistant.const import (
     CONF_NAME,
     SPEED_KILOMETERS_PER_HOUR,
     TEMP_CELSIUS,
+    UNIT_DEGREE,
     UNIT_PERCENTAGE,
     __version__,
 )
@@ -48,14 +49,14 @@ SENSOR_TYPES = {
         f"WG {SPEED_KILOMETERS_PER_HOUR}",
         float,
     ),
-    "wind_bearing": ("Wind Bearing", "°", "WR °", int),
+    "wind_bearing": ("Wind Bearing", UNIT_DEGREE, f"WR {UNIT_DEGREE}", int),
     "wind_max_speed": (
         "Top Wind Speed",
         SPEED_KILOMETERS_PER_HOUR,
         f"WSG {SPEED_KILOMETERS_PER_HOUR}",
         float,
     ),
-    "wind_max_bearing": ("Top Wind Bearing", "°", "WSR °", int),
+    "wind_max_bearing": ("Top Wind Bearing", UNIT_DEGREE, f"WSR {UNIT_DEGREE}", int),
     "sun_last_hour": ("Sun Last Hour", UNIT_PERCENTAGE, f"SO {UNIT_PERCENTAGE}", int),
     "temperature": ("Temperature", TEMP_CELSIUS, f"T {TEMP_CELSIUS}", float),
     "precipitation": ("Precipitation", "l/m²", "N l/m²", float),
diff --git a/homeassistant/const.py b/homeassistant/const.py
index 0b8c3303358..99274d59ff7 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -352,9 +352,13 @@ UNIT_VOLT = "V"
 ENERGY_WATT_HOUR = f"{POWER_WATT}h"
 ENERGY_KILO_WATT_HOUR = f"k{ENERGY_WATT_HOUR}"
 
+# Degree units
+UNIT_DEGREE = "°"
+
 # Temperature units
-TEMP_CELSIUS = "°C"
-TEMP_FAHRENHEIT = "°F"
+TEMP_CELSIUS = f"{UNIT_DEGREE}C"
+TEMP_FAHRENHEIT = f"{UNIT_DEGREE}F"
+TEMP_KELVIN = f"{UNIT_DEGREE}K"
 
 # Time units
 TIME_MICROSECONDS = "μs"
@@ -410,6 +414,7 @@ UNIT_UV_INDEX: str = "UV index"
 
 # Percentage units
 UNIT_PERCENTAGE = "%"
+
 # Irradiation units
 IRRADIATION_WATTS_PER_SQUARE_METER = f"{POWER_WATT}/{AREA_SQUARE_METERS}"
 
diff --git a/tests/components/prometheus/test_init.py b/tests/components/prometheus/test_init.py
index 66ee4d60bf3..699df2c3505 100644
--- a/tests/components/prometheus/test_init.py
+++ b/tests/components/prometheus/test_init.py
@@ -9,6 +9,7 @@ from homeassistant.const import (
     CONCENTRATION_MICROGRAMS_PER_CUBIC_METER,
     DEVICE_CLASS_POWER,
     ENERGY_KILO_WATT_HOUR,
+    UNIT_DEGREE,
 )
 from homeassistant.setup import async_setup_component
 
@@ -47,7 +48,7 @@ async def prometheus_client(loop, hass, hass_client):
     sensor3.entity_id = "sensor.electricity_price"
     await sensor3.async_update_ha_state()
 
-    sensor4 = DemoSensor(None, "Wind Direction", 25, None, "°", None)
+    sensor4 = DemoSensor(None, "Wind Direction", 25, None, UNIT_DEGREE, None)
     sensor4.hass = hass
     sensor4.entity_id = "sensor.wind_direction"
     await sensor4.async_update_ha_state()
diff --git a/tests/components/yr/test_sensor.py b/tests/components/yr/test_sensor.py
index 398acd7d554..b500a03c422 100644
--- a/tests/components/yr/test_sensor.py
+++ b/tests/components/yr/test_sensor.py
@@ -3,7 +3,7 @@ from datetime import datetime
 from unittest.mock import patch
 
 from homeassistant.bootstrap import async_setup_component
-from homeassistant.const import SPEED_METERS_PER_SECOND, UNIT_PERCENTAGE
+from homeassistant.const import SPEED_METERS_PER_SECOND, UNIT_DEGREE, UNIT_PERCENTAGE
 import homeassistant.util.dt as dt_util
 
 from tests.common import assert_setup_component, load_fixture
@@ -59,7 +59,7 @@ async def test_custom_setup(hass, aioclient_mock):
     assert state.state == "1009.3"
 
     state = hass.states.get("sensor.yr_wind_direction")
-    assert state.attributes.get("unit_of_measurement") == "°"
+    assert state.attributes.get("unit_of_measurement") == UNIT_DEGREE
     assert state.state == "103.6"
 
     state = hass.states.get("sensor.yr_humidity")
@@ -105,7 +105,7 @@ async def test_forecast_setup(hass, aioclient_mock):
     assert state.state == "1008.3"
 
     state = hass.states.get("sensor.yr_wind_direction")
-    assert state.attributes.get("unit_of_measurement") == "°"
+    assert state.attributes.get("unit_of_measurement") == UNIT_DEGREE
     assert state.state == "148.9"
 
     state = hass.states.get("sensor.yr_humidity")