Average temperature in St. Helena (CA)
The mean minimum and maximum temperatures over the year in St. Helena (California), the United States of America.
- The months of April, May, June and October have nice average temperatures.
- Hot season / summer is in June, July, August and September.
- On average, the warmest month is July with 32°C.
- On average, the coolest month is December with 14°C.
- The average annual maximum temperature is 24°C.
- The average annual minimum temperature is 9°C.
Forecast for St. Helena (CA)
Sat May 04
13°C | 5°C
W 
18 km/h
18 km/h22 mm
broken clouds and rain
Sun May 05
17°C | 3°C
SW 18 km/h
18 km/h
partly cloudy and no rain
Mon May 06
20°C | 3°C
W 18 km/h
18 km/h
partly cloudy and no rain
