Saint Helena, CA Weather Forecast and Current Conditions

WEATHER ALERTS - Coastal Flood Advisory

Current Conditions From Nearby Local Station

38°F
Feels Like 38°F  
Humidity 85% Dew Point 34°F Wind Calm Barometer 30.23 in.
Report from a personal weather station 0.4 mi. WSW of central Saint Helena
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Point Forecast at a Glance

WedDec 3
Wed Dec 3: Mostly Cloudy, Low 39F
 
39
ThuDec 4
Thu Dec 4: Sunny, High 62F, Low 42F
62
42
FriDec 5
Fri Dec 5: Sunny, High 64F, Low 43F
64
43
SatDec 6
Sat Dec 6: 10am And Noon, High 64F, Low 45F
64
45
SunDec 7
Sun Dec 7: Mostly Cloudy, High 65F, Low 43F
65
43
MonDec 8
Mon Dec 8: Mostly Cloudy, High 66F, Low 45F
66
45
TueDec 9
Tue Dec 9: Mostly Cloudy, High 66F, Low 46F
66
46

7-Day Temperature Trend

Week Ahead Summary

High temperatures remain relatively stable through the week, ranging from 62°F to 66°F. Dry weather expected throughout the week.

Climate Context

This week's forecast shows temperatures running 8°F above the historical average for December. Normal highs for this period are around 57°F with lows around 38°F.

This Date in Weather History

1987 - A cold front crossing the Pacific Coast Region brought high winds and heavy rain to California. Thunderstorm winds gusted to 55 mph at Newport Beach CA, and Mount Wilson CA was drenched with 2.17 inches of rain in six hours. Gale force winds prevailed along the Northern Pacific Coast, and winds in the Tehachapis Mountains of southern California gusted to 60 mph.

More on this and other weather history

Saint Helena, CA 7 Day Weather Forecast Details

Wednesday Dec 3

Mostly Cloudy

Night: Mostly cloudy, with a low around 39. Calm wind.

Thursday Dec 4

Sunny

Day: Sunny, with a high near 62. South wind around 5 mph becoming calm in the afternoon.

Mostly Clear

Night: Mostly clear, with a low around 42. Light and variable wind.

Friday Dec 5

Sunny

Day: Sunny, with a high near 64. Calm wind becoming northwest around 6 mph in the afternoon.

Partly Cloudy

Night: Patchy fog before 1am. Otherwise, mostly clear, with a low around 43. Calm wind becoming north around 6 mph after midnight.

Saturday Dec 6

10am And Noon

Day: Areas of fog between 10am and noon. Otherwise, sunny, with a high near 64.

Partly Cloudy

Night: Patchy fog. Otherwise, partly cloudy, with a low around 45.

Sunday Dec 7

Mostly Cloudy

Day: Areas of fog before 10am. Otherwise, mostly sunny, with a high near 65.

Partly Cloudy

Night: Patchy fog. Otherwise, partly cloudy, with a low around 43.

Monday Dec 8

Mostly Cloudy

Day: Patchy fog before 10am. Otherwise, sunny, with a high near 66.

Partly Cloudy

Night: Patchy fog. Otherwise, partly cloudy, with a low around 45.

Tuesday Dec 9

Mostly Cloudy

Day: Patchy fog. Otherwise, mostly sunny, with a high near 66.

Partly Cloudy

Night: Areas of fog. Otherwise, mostly cloudy, with a low around 46.

Wednesday Dec 10

Mostly Cloudy

Day: Patchy fog. Otherwise, mostly sunny, with a high near 68.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.