Weather for Saint Helena, California
Current Weather
Humidity: 73%
Feels Like: 66°F
Wind: SSE 3.8 mph
Wind Gusts: 6.7 mph
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0
Five Day Weather Forecast
Tue
H: 82°F
L: 58°F
Wed
H: 62°F
L: 50°F
Thu
H: 58°F
L: 54°F
Fri
H: 65°F
L: 47°F
Sat
H: 68°F
L: 46°F
Air Quality
Nitrogen Dioxide: 52.85 μg/m3
Sulphur Dioxide: 5.25 μg/m3
Ozone: 1 μg/m3
Astronomical
Sun Transit: 11:53 AM
Sunset: 4:59 PM
Daylight: 10 hrs 11 mins
Moon Transit: 5:44 AM
Moonset: 1:01 PM
Moon Phase: Waning Gibbous
Moon Illumination: 57.1%
Best Times for Fishing or Hunting
Major Periods
5:14 AM - 7:44 AM1:11 PM - 3:41 PM
Minor Periods
12:00 AM - 12:00 AM12:31 AM - 2:01 PM
Action Rating: 2 out of 5
Wind Advisory issued November 11 at 11:24AM PST until November 13 at 10:00AM PST by NWS San Francisco CA
Effective: Tue November 11, 2025, 7:24 PM
Expires: Wed November 12, 2025, 3:30 AM
* WHAT...Southerly winds 15 to 25 mph with gusts up to 45 mph expected. * WHERE...The Bay Area, The Central Coast, The Santa Clara Valley and Eastern Hills, The Salinas and Carmel Valleys and Hollister Area, The Santa Cruz Mountains, and San Francisco Peninsula Coast. * WHEN...From 10 PM Wednesday to 10 AM PST Thursday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * ADDITIONAL DETAILS...Wind gusts up to to 55 mph are expected along the coast and in the higher elevations. Gusts have the potential to exceed 60 mph in the region's peaks.
Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Secure outdoor objects. Winds this strong can make driving difficult, especially for high profile vehicles such as tractor trailers or RVs. Use extra caution. Secure loose outdoor objects that could be blown around or damaged by the wind.
Wind Advisory issued November 11 at 11:38AM PST until November 13 at 1:00PM PST by NWS Sacramento CA
Effective: Tue November 11, 2025, 7:38 PM
Expires: Thu November 13, 2025, 12:00 AM
* WHAT...Southerly winds 15 to 25 mph with gusts up to 35 to 50 mph expected. * WHERE...Carquinez Strait and Delta, Sacramento Valley, Northeast Foothills and Northern San Joaquin Valley * WHEN...From 10 PM Wednesday to 1 PM PST Thursday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * ADDITIONAL DETAILS...Strongest winds expected Thursday morning.
Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Secure outdoor objects.
Wind Advisory issued November 11 at 11:36AM PST until November 13 at 4:00AM PST by NWS Eureka CA
Effective: Tue November 11, 2025, 7:36 PM
Expires: Wed November 12, 2025, 3:45 AM
* WHAT...South winds 20 to 30 mph with gusts up to 55 mph expected. * WHERE...Lake County. * WHEN...From 10 PM Wednesday to 4 AM PST Thursday. * IMPACTS...Wind gusts will be particularly strong along windward ridges. Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. The strongest winds are expected after dark.
Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution, especially in forested areas.
Weather Forecast
Average Temperature: 66.1°F
Average Humidity: 49%
Wind: 3.8 mph
UV Index: 0.5
Air Quality
Nitrogen Dioxide: 23.43 μg/m3
Sulphur Dioxide: 3.08 μg/m3
Ozone: 43.64 μg/m3
Astronomical
Sun Transit: 11:53 AM
Sunset: 4:59 PM
Daylight: 10 hrs 11 mins
Moon Transit: 5:44 AM
Moonset: 1:01 PM
Moon Phase: Waning Gibbous
Moon Illumination: 57.1%
Best Times for Fishing or Hunting
Major Periods
5:14 AM - 7:44 AM1:11 PM - 3:41 PM
Minor Periods
12:00 AM - 12:00 AM12:31 AM - 2:01 PM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 56.2°F
Average Humidity: 85%
Wind: 11.4 mph
UV Index: 0.5
Air Quality
Nitrogen Dioxide: 26.55 μg/m3
Sulphur Dioxide: 3.65 μg/m3
Ozone: 34 μg/m3
Astronomical
Sun Transit: 11:53 AM
Sunset: 4:58 PM
Daylight: 10 hrs 9 mins
Moon Transit: 6:33 AM
Moonset: 1:29 PM
Moon Phase: Last Quarter
Moon Illumination: 45.8%
Best Times for Fishing or Hunting
Major Periods
6:03 AM - 8:33 AM1:59 PM - 4:29 PM
Minor Periods
12:59 AM - 2:29 PM12:00 AM - 12:00 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 56°F
Average Humidity: 94%
Wind: 13.6 mph
UV Index: 0.1
Air Quality
Nitrogen Dioxide: 4.66 μg/m3
Sulphur Dioxide: 1.93 μg/m3
Ozone: 73.44 μg/m3
Astronomical
Sun Transit: 11:53 AM
Sunset: 4:57 PM
Daylight: 10 hrs 7 mins
Moon Transit: 7:17 AM
Moonset: 1:53 PM
Moon Phase: Last Quarter
Moon Illumination: 34.7%
Best Times for Fishing or Hunting
Major Periods
6:47 AM - 9:17 AM2:42 PM - 5:12 PM
Minor Periods
1:23 PM - 2:53 PM12:02 AM - 1:32 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 53.6°F
Average Humidity: 82%
Wind: 5.6 mph
UV Index: 0.4
Air Quality
Nitrogen Dioxide: 6.75 μg/m3
Sulphur Dioxide: 1.87 μg/m3
Ozone: 61.72 μg/m3
Astronomical
Sun Transit: 11:54 AM
Sunset: 4:57 PM
Daylight: 10 hrs 6 mins
Moon Transit: 8:00 AM
Moonset: 2:15 PM
Moon Phase: Last Quarter
Moon Illumination: 24.4%
Best Times for Fishing or Hunting
Major Periods
7:30 AM - 10:00 AM3:23 PM - 5:53 PM
Minor Periods
1:45 PM - 3:15 PM1:04 AM - 2:34 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 54.3°F
Average Humidity: 73%
Wind: 6 mph
UV Index: 0.5
Air Quality
Nitrogen Dioxide: 8.73 μg/m3
Sulphur Dioxide: 2.12 μg/m3
Ozone: 50.77 μg/m3
Astronomical
Sun Transit: 11:54 AM
Sunset: 4:56 PM
Daylight: 10 hrs 4 mins
Moon Transit: 8:39 AM
Moonset: 2:36 PM
Moon Phase: Waning Crescent
Moon Illumination: 15.4%
Best Times for Fishing or Hunting
Major Periods
8:09 AM - 10:39 AM4:03 PM - 6:33 PM
Minor Periods
2:06 PM - 3:36 PM2:05 AM - 3:35 AM
Action Rating: 2 out of 5