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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 · 9:51 AM PDT
22° | 10°
15°C
Feels like 15°
Mostly cloudy
WindSW 4 mph · Gusts 7 mph
Precip10% · –
Humidity83% · Dew point 12°
UV index7 High
Air Quality27 Good
Pressure29.97 inHg
Visibility6 mi
Sunrise / Sunset6:39 AM · 7:40 PM · 13h 1m

Weather map — Saint Helena

Full radar →
Now
15°
25%
4 mph
10:00
17°
20%
4 mph
11:00
19°
15%
6 mph
12:00
20°
13%
7 mph
13:00
22°
4%
9 mph
14:00
21°
4%
9 mph
15:00
22°
1%
9 mph
16:00
22°
1%
12 mph
17:00
20°
1%
13 mph
18:00
18°
5%
13 mph
19:00
16°
13%
11 mph
20:00
14°
16%
9 mph
21:00
13°
19%
5 mph
22:00
12°
15%
4 mph
23:00
12°
24%
4 mph
00:00
11°
38%
4 mph
01:00
11°
38%
3 mph
02:00
11°
38%
4 mph
03:00
11°
32%
2 mph
04:00
12°
28%
1 mph
05:00
12°
38%
2 mph
06:00
13°
33%
1 mph
07:00
13°
27%
3 mph
08:00
13°
29%
4 mph

Today · Tue 9/1

High 22°
10% / –

Sunny. Winds SW at 13 mph.

Tonight · Tue 9/1

Low 11°
19% / –

Partly cloudy. Winds SW at 5 mph.

Tomorrow · Wed 9/2

22° | 11°
50% / 0.02 in

Mostly cloudy. Winds SW at 13 mph.

7-day trend

Saint Helena · temperature + precipitation

10-day forecast

Updated 9:51 AM

Details & indices

Wind
4 mph SW
Gusts 7 mph
Humidity
83%
Dew point 12°
Pressure
29.97 inHg
Rising
UV index
7 — High
High today
Air Quality
Good
AQI 27 · US EPA
Allergy
Very high
Grass
Visibility
6 mi
Clear view
Allergy — Saint Helena

🌿 Conditions right now

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

Sun & moon

Sunrise6:39 AM
Sunset7:40 PM
Length of day13h 1m
Moonrise9:48 PM
Moonset11:33 AM
Moon phase🌖 Waning Gibbous · 78%
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
Great
Line-drying weather
Grilling
Great
Fire up the grill
Running
Great
Lace up outside
Patio
Great
Dinner outdoors
Nearby places in {{REGION}}
Los Angeles
Mostly cloudy
20°
San Diego
Partly cloudy
23°
San Jose
Mostly cloudy
16°
San Francisco
Showers
17°
Fresno
Sunny
19°
Sacramento
Sunny
17°
Data sources · Tuesday, September 1
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: 9:51 AM
Weather in Saint Helena
Over the next 10 days Saint Helena tops out around 36° (Wednesday) and dips to 10° on the coolest night (Friday). Models drop roughly 0.10 in of precipitation across the stretch — watch Thursday (80%). No watches or warnings are active for the area right now. Right now Saint Helena is running about 44° warmer than Salinas. 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: 9:51 AM