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WeatherLive › California › Saint Helena

Saint Helena, CA Weather (94574)

Today Hourly 10-Day Weekend Monthly Radar Air Quality Climate
Current WeatherSaint Helena · 1:32 AM PDT
75° | 49°
56°F
Feels like 55°
Partly cloudy
WindW 3 mph · Gusts 12 mph
Precip57% · 0.08 in
Humidity88% · Dew point 52°
UV index8 High
Air Quality38 Good
Pressure29.88 inHg
Visibility1 mi
Sunrise / Sunset6:41 AM · 7:35 PM · 12h 54m

Weather map — Saint Helena

Full radar →
Now
56°
43%
3 mph
02:00
55°
47%
3 mph
03:00
53°
48%
4 mph
04:00
52°
48%
3 mph
05:00
51°
43%
3 mph
06:00
50°
42%
4 mph
07:00
49°
46%
3 mph
08:00
53°
43%
2 mph
09:00
60°
30%
2 mph
10:00
63°
2%
2 mph
11:00
68°
1%
2 mph
12:00
72°
1%
3 mph
13:00
74°
0%
4 mph
14:00
75°
0%
5 mph
15:00
75°
0%
8 mph
16:00
74°
0%
11 mph
17:00
70°
1%
12 mph
18:00
67°
1%
9 mph
19:00
64°
2%
6 mph
20:00
58°
4%
4 mph
21:00
55°
6%
3 mph
22:00
54°
7%
3 mph
23:00
53°
9%
4 mph
00:00
52°
11%
4 mph

Today · Fri 9/4

High 75°
57% / 0.08 in

Sunny. Winds W at 12 mph.

Overnight · Fri 9/4

Low 49°
47% / 0.01 in

Partly cloudy. Winds W at 3 mph.

Tomorrow · Sat 9/5

78° | 49°
3% / –

Sunny. Winds SW at 12 mph.

7-day trend

Saint Helena · temperature + precipitation

10-day forecast

Updated 1:32 AM

Details & indices

Wind
3 mph W
Gusts 12 mph
Humidity
88%
Dew point 52°
Pressure
29.88 inHg
Falling
UV index
8 — High
High today
Air Quality
Good
AQI 38 · US EPA
Allergy
Moderate
Grass
Visibility
1 mi
Reduced
Allergy — Saint Helena

🌿 Conditions right now

View all →
Birch
None
Grass
Moderate
Oak
None
Alder
None
Hazel
None
Mugwort
Low
Ragweed
Moderate

Sun & moon

Sunrise6:41 AM
Sunset7:35 PM
Length of day12h 54m
Moonrise—
Moonset3:08 PM
Moon phase🌗 Last Quarter · 50%
Next full moonSep 26 Harvest Moon
Latitude38.5052°N
Longitude-122.4703°E

Water temps nearby

View all →
Stinson Beach (43 mi)59°
🌤️No rain expected in the next 90 minutes
Now+30+60+90 min
Minute-by-minute precip · HRRR nowcast

Daily planner

computed from today's forecast
Laundry day
Poor
Line-drying weather
Grilling
Fair
Fire up the grill
Running
Poor
Lace up outside
Patio
Fair
Dinner outdoors
Nearby places in {{REGION}}
Los Angeles
Sunny
62°
San Diego
Sunny
64°
San Jose
Partly cloudy
63°
San Francisco
Partly cloudy
57°
Fresno
Sunny
66°
Sacramento
Mostly cloudy
64°
Data sources · Friday, September 4
Where the Saint Helena forecast comes from
This page blends NOAA/NWS model guidance with global ensembles for the 10-day outlook, air quality and alerts. Data refreshes every hour, current conditions every 15 minutes. Coordinates: 38.5052°N, -122.4703°.
NBM + global weather models
Updated: 1:32 AM
Weather in Saint Helena
Over the next 10 days Saint Helena tops out around 90° (Sunday) and dips to 49° on the coolest night (Monday). Models drop roughly 0.08 in of precipitation across the stretch — watch Friday (57%). No watches or warnings are active for the area right now. Right now Saint Helena is about 9° cooler than nearby Stockton. Longer view: marine climate — mild, showery winters and dry, gentle summers.
Saint Helena, CA · Elev 253 ft · 38.51°N, 122.47°W · California · Forecast computed for these exact coordinates
Powered by NWS/NOAA guidance, multi-model forecasts and official environmental feeds · NOAA/NWS · EPA AirNow · MET Norway · global models
Updated: 1:32 AM