diff --git a/homeassistant/components/weather/__init__.py b/homeassistant/components/weather/__init__.py
index 8ddcf052e1f..5127dae1102 100644
--- a/homeassistant/components/weather/__init__.py
+++ b/homeassistant/components/weather/__init__.py
@@ -35,6 +35,7 @@ ATTR_FORECAST = "forecast"
 ATTR_FORECAST_CONDITION = "condition"
 ATTR_FORECAST_PRECIPITATION = "precipitation"
 ATTR_FORECAST_PRECIPITATION_PROBABILITY = "precipitation_probability"
+ATTR_FORECAST_PRESSURE = "pressure"
 ATTR_FORECAST_TEMP = "temperature"
 ATTR_FORECAST_TEMP_LOW = "templow"
 ATTR_FORECAST_TIME = "datetime"