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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 · 11:17 PM PDT
89° | 55°
60°F
Feels like 59°
Mostly cloudy
WindW 4 mph · Gusts 13 mph
Precip16% · –
Humidity88% · Dew point 56°
UV index9 Very high
Air Quality26 Good
Pressure29.97 inHg
Visibility6 mi
Sunrise / Sunset6:28 AM · 7:57 PM · 13h 29m

Weather map — Saint Helena

Full radar →
Now
60°
28%
4 mph
00:00
57°
34%
3 mph
01:00
56°
35%
3 mph
02:00
56°
35%
3 mph
03:00
56°
35%
3 mph
04:00
56°
35%
3 mph
05:00
56°
35%
4 mph
06:00
56°
35%
3 mph
07:00
56°
35%
3 mph
08:00
59°
28%
3 mph
09:00
64°
12%
3 mph
10:00
76°
7%
4 mph
11:00
82°
8%
4 mph
12:00
85°
9%
5 mph
13:00
87°
9%
7 mph
14:00
87°
3%
8 mph
15:00
87°
4%
9 mph
16:00
84°
9%
8 mph
17:00
81°
9%
7 mph
18:00
76°
9%
6 mph
19:00
72°
4%
5 mph
20:00
65°
3%
5 mph
21:00
60°
6%
4 mph
22:00
58°
8%
4 mph

Today · Thu 8/20

High 89°
16% / –

Mostly cloudy. Winds SW at 6 mph.

Tonight · Thu 8/20

Low 56°
34% / –

Fog. Winds W at 3 mph.

Tomorrow · Fri 8/21

87° | 56°
10% / –

Fog. Winds SW at 9 mph.

7-day trend

Saint Helena · temperature + precipitation

10-day forecast

Updated 11:17 PM

Details & indices

Wind
4 mph W
Gusts 13 mph
Humidity
88%
Dew point 56°
Pressure
29.97 inHg
Rising
UV index
9 — Very high
High today
Air Quality
Good
AQI 26 · 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
High
Ragweed
Moderate

Sun & moon

Sunrise6:28 AM
Sunset7:57 PM
Length of day13h 29m
Moonrise3:03 PM
Moonset—
Moon phase🌓 First Quarter · 61%
Next full moonAug 27 Sturgeon Moon
Latitude38.5052°N
Longitude-122.4703°E

Water temps nearby

View all →
Stinson Beach (43 mi)60°
🌤️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
Fair
Line-drying weather
Grilling
Great
Fire up the grill
Running
Fair
Lace up outside
Patio
Great
Dinner outdoors
Nearby places in {{REGION}}
Los Angeles
Mostly cloudy
71° 🌤️
San Diego
—
— 🌤️
San Jose
—
—
San Francisco
Mostly cloudy
57°
Fresno
Mostly cloudy
87° 🌤️
Sacramento
—
—
Data sources · Thursday, August 20
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: 11:17 PM
Weather in Saint Helena
Over the next 10 days Saint Helena tops out around 94° (Wednesday) and dips to 51° on the coolest night (Tuesday). The gauge should stay near zero — no meaningful precipitation is expected. No watches or warnings are active for the area right now. Right now Saint Helena is about 28° cooler than nearby Reno. 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: 11:17 PM