St. Helena (CA) Temperature by Month
This graph shows the average minimum and maximum temperatures throughout the year in St. Helena (California), the United States of America. The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM. During this time the sun's heating effect is the strongest.
Temperature patterns do vary with the seasons. In winter, the time of minimum and maximum temperatures can shift slightly compared to summer.
- 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.
Current temperature in St. Helena (CA)
Fri Nov 15
16°C | 3°C
NW 
11 km/h
11 km/h
clear and no rain
Sat Nov 16
15°C | 0°C
N 4 km/h
4 km/h
partly cloudy and no rain
Sun Nov 17
16°C | 2°C
W 14 km/h
14 km/h0.5 mm
broken clouds and chance of slight rain
