diff --git a/homeassistant/components/openweathermap/sensor.py b/homeassistant/components/openweathermap/sensor.py
index b730923f0bd..938fb609158 100644
--- a/homeassistant/components/openweathermap/sensor.py
+++ b/homeassistant/components/openweathermap/sensor.py
@@ -165,15 +165,16 @@ class OpenWeatherMapSensor(Entity):
                 self._state = data.get_clouds()
             elif self.type == "rain":
                 rain = data.get_rain()
-                if "3h" in rain:
-                    self._state = round(rain["3h"], 0)
+                if "1h" in rain:
+                    self._state = round(rain["1h"], 0)
                     self._unit_of_measurement = "mm"
                 else:
                     self._state = "not raining"
                     self._unit_of_measurement = ""
             elif self.type == "snow":
-                if data.get_snow():
-                    self._state = round(data.get_snow(), 0)
+                snow = data.get_snow()
+                if "1h" in snow:
+                    self._state = round(snow["1h"], 0)
                     self._unit_of_measurement = "mm"
                 else:
                     self._state = "not snowing"
diff --git a/homeassistant/components/openweathermap/weather.py b/homeassistant/components/openweathermap/weather.py
index ce8676ad440..7200e759d3b 100644
--- a/homeassistant/components/openweathermap/weather.py
+++ b/homeassistant/components/openweathermap/weather.py
@@ -203,18 +203,16 @@ class OpenWeatherMapWeather(WeatherEntity):
                     }
                 )
             else:
+                rain = entry.get_rain().get("1h")
+                if rain is not None:
+                    rain = round(rain, 1)
                 data.append(
                     {
                         ATTR_FORECAST_TIME: entry.get_reference_time("unix") * 1000,
                         ATTR_FORECAST_TEMP: entry.get_temperature("celsius").get(
                             "temp"
                         ),
-                        ATTR_FORECAST_PRECIPITATION: (
-                            round(entry.get_rain().get("3h"), 1)
-                            if entry.get_rain().get("3h") is not None
-                            and (round(entry.get_rain().get("3h"), 1) > 0)
-                            else None
-                        ),
+                        ATTR_FORECAST_PRECIPITATION: rain,
                         ATTR_FORECAST_CONDITION: [
                             k
                             for k, v in CONDITION_CLASSES.items()