St. Helena, CA Weather Forecast
Napa County, California
Live radar, warnings and storm tracking for St. Helena, with free alerts the moment it counts.
The next few hours
Taller, warmer bars mean heavier rain. Dotted means no reading for that hour.
Hour by hour
Sunrise and sunset
Next five days, scored 0 to 100The first day or two use the HRRR and NBM cloud layers. Later days only have total cloud, so treat them as a rough guide.
Know when sunset at this place will be worth a photo
We score every sunrise and sunset here from the cloud, haze and smoke forecast, and let you know when one is likely to light up. Sunrise the evening before, sunset a few hours ahead.
Seven-day outlook
Free alerts for St. Helena
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
St. Helena, CA at a glance
St. Helena is home to about 5,272 people in Napa County, across 5 square miles. It ranks 423rd by population of 450 places in California with a forecast here. The nearest neighbour with its own forecast is Calistoga, 8 miles away.
- County
- Napa County
- Population
- 5,272 2023 est.
- Land area
- 5 sq mi
- People per sq mi
- 1,064
- Forecast point
- 38.5128°N, 122.4681°W
How well can the network see St. Helena?
The nearest Doppler radar is KDAX (Sacramento, CA), to the E. Its lowest scan passes about 2,900 ft above St. Helena. Close enough to see rotation in the low part of a storm, where tornadoes form. St. Helena is closer to its radar than 52% of US cities.
The closest weather station is KSTS (Santa Rosa/Schulz Arpt). Far enough that current conditions for St. Helena are a reading from somewhere else.
Forecasts near St. Helena
- Calistoga, CA8 mi
- Yountville, CA10 mi
- Santa Rosa, CA14 mi
- Sonoma, CA15 mi
- Rohnert Park, CA17 mi
- Napa, CA17 mi
- Cotati, CA18 mi
- Windsor, CA19 mi
Elsewhere in California
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