Weather for Saint Helena, California
Current Weather
Humidity: 86%
Feels Like: 50.7°F
Wind: S 4.7 mph
Wind Gusts: 6.3 mph
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 9 mi
UV Index: 0
Five Day Weather Forecast
Wed
H: 51°F
L: 38°F
Thu
H: 48°F
L: 39°F
Fri
H: 46°F
L: 36°F
Sat
H: 53°F
L: 39°F
Sun
H: 55°F
L: 45°F
Air Quality
Nitrogen Dioxide: 10.92 μg/m3
Sulphur Dioxide: 2.59 μg/m3
Ozone: 79 μg/m3
Astronomical
Sun Transit: 12:00 AM
Sunset: 7:14 PM
Daylight: 11 hrs 49 mins
Moon Transit: 12:00 AM
Moonset: 6:51 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.3%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM7:23 AM - 9:53 AM
Minor Periods
5:29 PM - 6:59 PM6:21 AM - 7:51 AM
Action Rating: 5 out of 5
Wind Advisory issued March 11 at 12:35PM PDT until March 12 at 11:00PM PDT by NWS Sacramento CA
Effective: Tue March 11, 2025, 7:35 PM
Expires: Wed March 12, 2025, 2:00 PM
* WHAT...South winds 15 to 25 mph with gusts 45 to 55 mph expected. * WHERE...Motherlode, Mountains Southwestern Shasta County to Western Colusa County, Northern San Joaquin Valley, and Southern Sacramento Valley. * WHEN...From 8 PM this evening to 11 PM PDT Wednesday. * 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 will be Wednesday late morning to early afternoon and across the foothills.
Gusty winds will blow around unsecured objects. Tree limbs could be blown down and may result in isolated power outages.
Wind Advisory issued March 11 at 12:35PM PDT until March 12 at 11:00PM PDT by NWS Sacramento CA
Effective: Tue March 11, 2025, 7:35 PM
Expires: Wed March 12, 2025, 2:00 PM
* WHAT...South winds 15 to 25 mph with gusts 45 to 55 mph expected. * WHERE...Motherlode, Mountains Southwestern Shasta County to Western Colusa County, Northern San Joaquin Valley, and Southern Sacramento Valley. * WHEN...From 8 PM this evening to 11 PM PDT Wednesday. * 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 will be Wednesday late morning to early afternoon and across the foothills.
Gusty winds will blow around unsecured objects. Tree limbs could be blown down and may result in isolated power outages.
Wind Advisory issued March 11 at 12:35PM PDT until March 12 at 11:00PM PDT by NWS Sacramento CA
Effective: Tue March 11, 2025, 7:35 PM
Expires: Wed March 12, 2025, 2:00 PM
* WHAT...South winds 15 to 25 mph with gusts 45 to 55 mph expected. * WHERE...Motherlode, Mountains Southwestern Shasta County to Western Colusa County, Northern San Joaquin Valley, and Southern Sacramento Valley. * WHEN...From 8 PM this evening to 11 PM PDT Wednesday. * 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 will be Wednesday late morning to early afternoon and across the foothills.
Gusty winds will blow around unsecured objects. Tree limbs could be blown down and may result in isolated power outages.
Wind Advisory issued March 11 at 12:35PM PDT until March 12 at 11:00PM PDT by NWS Sacramento CA
Effective: Tue March 11, 2025, 7:35 PM
Expires: Wed March 12, 2025, 2:00 PM
* WHAT...South winds 15 to 25 mph with gusts 45 to 55 mph expected. * WHERE...Motherlode, Mountains Southwestern Shasta County to Western Colusa County, Northern San Joaquin Valley, and Southern Sacramento Valley. * WHEN...From 8 PM this evening to 11 PM PDT Wednesday. * 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 will be Wednesday late morning to early afternoon and across the foothills.
Gusty winds will blow around unsecured objects. Tree limbs could be blown down and may result in isolated power outages.
Winter Storm Warning issued March 11 at 12:57PM PDT until March 13 at 11:00PM PDT by NWS Sacramento CA
Effective: Tue March 11, 2025, 7:57 PM
Expires: Wed March 12, 2025, 2:00 PM
* WHAT...Heavy snow above 3000 feet. Total snow accumulations between 4 and 12 inches, with up to 2 feet over peaks. Winds could gust as high as 60 mph. * WHERE...Burney Basin / Eastern Shasta County, Mountains Southwestern Shasta County to Western Colusa County, and Shasta Lake Area / Northern Shasta County Counties. * WHEN...From 11 PM this evening to 11 PM PDT Thursday. * IMPACTS...Difficult travel conditions from chain controls, road closures, and low visibility due to the combination of wind and heavy snow expected. Hazardous conditions will impact the morning and afternoon commutes on Wednesday and Thursday. * ADDITIONAL DETAILS...Heaviest snowfall expected through Wednesday afternoon with snowfall rates of 2 to 3 inches per hour at times.
Check the latest road conditions from Caltrans online at quickmap.dot.ca.gov or dial 5 1 1.
Weather Forecast
Average Temperature: 47.2°F
Average Humidity: 95%
Wind: 20.4 mph
UV Index: 0.1
Air Quality
Nitrogen Dioxide: 11.37 μg/m3
Sulphur Dioxide: 2.78 μg/m3
Ozone: 80.04 μg/m3
Astronomical
Sun Transit: 12:00 AM
Sunset: 7:14 PM
Daylight: 11 hrs 49 mins
Moon Transit: 12:00 AM
Moonset: 6:51 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.3%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM7:23 AM - 9:53 AM
Minor Periods
5:29 PM - 6:59 PM6:21 AM - 7:51 AM
Action Rating: 5 out of 5
Weather Forecast
Average Temperature: 43.1°F
Average Humidity: 78%
Wind: 12.8 mph
UV Index: 0.9
Air Quality
Nitrogen Dioxide: 6.92 μg/m3
Sulphur Dioxide: 1.96 μg/m3
Ozone: 77.04 μg/m3
Astronomical
Sun Transit: 12:00 AM
Sunset: 7:15 PM
Daylight: 11 hrs 52 mins
Moon Transit: 12:41 AM
Moonset: 7:13 AM
Moon Phase: Full
Moon Illumination: 99.7%
Best Times for Fishing or Hunting
Major Periods
12:11 AM - 2:41 AM8:05 AM - 10:35 AM
Minor Periods
6:29 PM - 7:59 PM6:43 AM - 8:13 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 41.3°F
Average Humidity: 95%
Wind: 10.7 mph
UV Index: 0.2
Air Quality
Nitrogen Dioxide: 11.12 μg/m3
Sulphur Dioxide: 4.43 μg/m3
Ozone: 70.12 μg/m3
Astronomical
Sun Transit: 12:00 AM
Sunset: 7:16 PM
Daylight: 11 hrs 54 mins
Moon Transit: 1:21 AM
Moonset: 7:33 AM
Moon Phase: Full
Moon Illumination: 99.6%
Best Times for Fishing or Hunting
Major Periods
12:51 AM - 3:21 AM8:45 AM - 11:15 AM
Minor Periods
7:29 PM - 8:59 PM7:03 AM - 8:33 AM
Action Rating: 5 out of 5
Weather Forecast
Average Temperature: 45.8°F
Average Humidity: 88%
Wind: 6 mph
UV Index: 1.1
Air Quality
Nitrogen Dioxide: 5.57 μg/m3
Sulphur Dioxide: 1.26 μg/m3
Ozone: 80.2 μg/m3
Astronomical
Sun Transit: 12:00 AM
Sunset: 7:17 PM
Daylight: 11 hrs 57 mins
Moon Transit: 2:00 AM
Moonset: 7:53 AM
Moon Phase: Full
Moon Illumination: 97.0%
Best Times for Fishing or Hunting
Major Periods
1:30 AM - 4:00 AM9:24 AM - 11:54 AM
Minor Periods
8:28 PM - 9:58 PM7:23 AM - 8:53 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 48.6°F
Average Humidity: 87%
Wind: 18.1 mph
UV Index: 0
Air Quality
Nitrogen Dioxide: 31.39 μg/m3
Sulphur Dioxide: 2.22 μg/m3
Ozone: 47.62 μg/m3
Astronomical
Sun Transit: 12:00 AM
Sunset: 7:18 PM
Daylight: 12 hrs mins
Moon Transit: 2:40 AM
Moonset: 8:14 AM
Moon Phase: Full
Moon Illumination: 91.9%
Best Times for Fishing or Hunting
Major Periods
2:10 AM - 4:40 AM10:04 AM - 12:34 AM
Minor Periods
9:27 PM - 10:57 PM7:44 AM - 9:14 AM
Action Rating: 4 out of 5