Average Monthly Sunshine hours in St. Helena (CA)

This graph shows the average number of hours per month that St. Helena receives direct sunlight. The numbers are calculated over a 30-year period to provide a reliable average.

• On average, May is the sunniest month with 310 hours of sunshine.
• December has on average the lowest amount of sunshine with 160 hours.

Forecast: is it sunny in St. Helena (CA)?

Fri   Nov 15

16°C | 3°C

NW 11 km/h

clear and no rain

hourly forecast

Sat   Nov 16

15°C | 0°C

N 4 km/h

partly cloudy and no rain

hourly forecast

Sun   Nov 17

16°C | 2°C

W 14 km/h

0.5 mm

broken clouds and chance of slight rain

hourly forecast

5-Day Forecast 10-Day Forecast