Weather for Saint Helena, California
Current Weather
55.9°F
Conditions: Overcast
Humidity: 77%
Feels Like: 56.6°F
Wind: SW 2.7 mph
Wind Gusts: 3.1 mph
Humidity: 77%
Feels Like: 56.6°F
Wind: SW 2.7 mph
Wind Gusts: 3.1 mph
Pressure: 30.02 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 9 mi
UV Index: 0.4
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 9 mi
UV Index: 0.4
Five Day Weather Forecast
Wed
H: 58°F
L: 46°F
Thu
H: 56°F
L: 44°F
Fri
H: 63°F
L: 42°F
Sat
H: 62°F
L: 45°F
Sun
H: 63°F
L: 41°F
Air Quality
AQI:
2 - Moderate
PM2.5:
17.35 μg/m3
PM10:
19.45 μg/m3
Carbon Monoxide: 191.85 μg/m3
Nitrogen Dioxide: 40.55 μg/m3
Sulphur Dioxide: 4.25 μg/m3
Ozone: 11 μg/m3
Nitrogen Dioxide: 40.55 μg/m3
Sulphur Dioxide: 4.25 μg/m3
Ozone: 11 μg/m3
Astronomical
Sunrise: 6:56 AM
Sun Transit: 11:54 AM
Sunset: 4:53 PM
Daylight: 9 hrs 57 mins
Sun Transit: 11:54 AM
Sunset: 4:53 PM
Daylight: 9 hrs 57 mins
Moonrise: 6:36 AM
Moon Transit: 11:28 AM
Moonset: 4:16 PM
Moon Phase: New
Moon Illumination: 0.3%
Moon Transit: 11:28 AM
Moonset: 4:16 PM
Moon Phase: New
Moon Illumination: 0.3%
Best Times for Fishing or Hunting
Major Periods
6:54 PM - 9:24 PM10:58 AM - 1:28 PM
Minor Periods
3:46 PM - 5:16 PM6:06 AM - 7:36 AM
Action Rating: 4 out of 5
Beach Hazards Statement issued November 19 at 5:36AM PST until November 24 at 10:00PM PST by NWS San Francisco CA
Effective: Wed November 19, 2025, 5:36 AM
Expires: Wed November 19, 2025, 4:00 PM
* WHAT...A long period northwesterly swell will result in an increased risk for sneaker waves and rip currents. Breaking waves of 13 to 18 feet are expected. * WHERE...Pacific Coast beaches. * WHEN...From Thursday afternoon through Monday evening. * IMPACTS...Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. Rip currents are typically more frequent and stronger in the vicinity of jetties, inlets, and piers.
Remain out of the water to avoid hazardous swimming conditions. Stay off rocks and never turn your back on the ocean!
Wednesday, November 19, 2025
Weather Forecast
Conditions: Overcast
Average Temperature: 51.3°F
Average Humidity: 81%
Average Temperature: 51.3°F
Average Humidity: 81%
Chance of Rain: 0%
Wind: 4 mph
UV Index: 0.2
Wind: 4 mph
UV Index: 0.2
Air Quality
AQI:
1 - Good
PM2.5:
12.41 μg/m3
PM10:
14.81 μg/m3
Carbon Monoxide: 159.85 μg/m3
Nitrogen Dioxide: 17.71 μg/m3
Sulphur Dioxide: 2.9 μg/m3
Ozone: 36.8 μg/m3
Nitrogen Dioxide: 17.71 μg/m3
Sulphur Dioxide: 2.9 μg/m3
Ozone: 36.8 μg/m3
Astronomical
Sunrise: 6:56 AM
Sun Transit: 11:54 AM
Sunset: 4:53 PM
Daylight: 9 hrs 57 mins
Sun Transit: 11:54 AM
Sunset: 4:53 PM
Daylight: 9 hrs 57 mins
Moonrise: 6:36 AM
Moon Transit: 11:28 AM
Moonset: 4:16 PM
Moon Phase: New
Moon Illumination: 0.3%
Moon Transit: 11:28 AM
Moonset: 4:16 PM
Moon Phase: New
Moon Illumination: 0.3%
Best Times for Fishing or Hunting
Major Periods
6:54 PM - 9:24 PM10:58 AM - 1:28 PM
Minor Periods
3:46 PM - 5:16 PM6:06 AM - 7:36 AM
Action Rating: 4 out of 5
Thursday, November 20, 2025
Weather Forecast
Conditions: Moderate rain
Average Temperature: 51.3°F
Average Humidity: 84%
Average Temperature: 51.3°F
Average Humidity: 84%
Chance of Rain: 79%
Wind: 8.7 mph
UV Index: 0.3
Wind: 8.7 mph
UV Index: 0.3
Air Quality
AQI:
1 - Good
PM2.5:
10.01 μg/m3
PM10:
11.71 μg/m3
Carbon Monoxide: 149.73 μg/m3
Nitrogen Dioxide: 18.57 μg/m3
Sulphur Dioxide: 2.96 μg/m3
Ozone: 41.84 μg/m3
Nitrogen Dioxide: 18.57 μg/m3
Sulphur Dioxide: 2.96 μg/m3
Ozone: 41.84 μg/m3
Astronomical
Sunrise: 6:57 AM
Sun Transit: 11:55 AM
Sunset: 4:53 PM
Daylight: 9 hrs 55 mins
Sun Transit: 11:55 AM
Sunset: 4:53 PM
Daylight: 9 hrs 55 mins
Moonrise: 7:37 AM
Moon Transit: 12:16 AM
Moonset: 4:52 PM
Moon Phase: New
Moon Illumination: 2.7%
Moon Transit: 12:16 AM
Moonset: 4:52 PM
Moon Phase: New
Moon Illumination: 2.7%
Best Times for Fishing or Hunting
Major Periods
7:43 PM - 10:13 PM11:46 AM - 2:16 PM
Minor Periods
4:22 PM - 5:52 PM7:07 AM - 8:37 AM
Action Rating: 4 out of 5
Friday, November 21, 2025
Weather Forecast
Conditions: Sunny
Average Temperature: 51.7°F
Average Humidity: 63%
Average Temperature: 51.7°F
Average Humidity: 63%
Chance of Rain: 0%
Wind: 9.8 mph
UV Index: 0.5
Wind: 9.8 mph
UV Index: 0.5
Air Quality
AQI:
1 - Good
PM2.5:
6.54 μg/m3
PM10:
7.22 μg/m3
Carbon Monoxide: 146.81 μg/m3
Nitrogen Dioxide: 13.77 μg/m3
Sulphur Dioxide: 1.9 μg/m3
Ozone: 43.28 μg/m3
Nitrogen Dioxide: 13.77 μg/m3
Sulphur Dioxide: 1.9 μg/m3
Ozone: 43.28 μg/m3
Astronomical
Sunrise: 6:58 AM
Sun Transit: 11:55 AM
Sunset: 4:52 PM
Daylight: 9 hrs 54 mins
Sun Transit: 11:55 AM
Sunset: 4:52 PM
Daylight: 9 hrs 54 mins
Moonrise: 8:37 AM
Moon Transit: 1:07 PM
Moonset: 5:35 PM
Moon Phase: New
Moon Illumination: 0.5%
Moon Transit: 1:07 PM
Moonset: 5:35 PM
Moon Phase: New
Moon Illumination: 0.5%
Best Times for Fishing or Hunting
Major Periods
8:34 PM - 11:04 PM12:37 AM - 3:07 PM
Minor Periods
5:05 PM - 6:35 PM8:07 AM - 9:37 AM
Action Rating: 4 out of 5
Saturday, November 22, 2025
Weather Forecast
Conditions: Sunny
Average Temperature: 50.6°F
Average Humidity: 60%
Average Temperature: 50.6°F
Average Humidity: 60%
Chance of Rain: 0%
Wind: 4.5 mph
UV Index: 0.5
Wind: 4.5 mph
UV Index: 0.5
Air Quality
AQI:
1 - Good
PM2.5:
9.42 μg/m3
PM10:
9.96 μg/m3
Carbon Monoxide: 136.37 μg/m3
Nitrogen Dioxide: 23.17 μg/m3
Sulphur Dioxide: 2.54 μg/m3
Ozone: 32.52 μg/m3
Nitrogen Dioxide: 23.17 μg/m3
Sulphur Dioxide: 2.54 μg/m3
Ozone: 32.52 μg/m3
Astronomical
Sunrise: 7:00 AM
Sun Transit: 11:55 AM
Sunset: 4:52 PM
Daylight: 9 hrs 52 mins
Sun Transit: 11:55 AM
Sunset: 4:52 PM
Daylight: 9 hrs 52 mins
Moonrise: 9:32 AM
Moon Transit: 1:58 PM
Moonset: 6:26 PM
Moon Phase: New
Moon Illumination: 3.3%
Moon Transit: 1:58 PM
Moonset: 6:26 PM
Moon Phase: New
Moon Illumination: 3.3%
Best Times for Fishing or Hunting
Major Periods
9:26 PM - 11:56 PM1:28 PM - 3:58 PM
Minor Periods
5:56 PM - 7:26 PM9:02 AM - 10:32 AM
Action Rating: 3 out of 5
Sunday, November 23, 2025
Weather Forecast
Conditions: Sunny
Average Temperature: 49.8°F
Average Humidity: 69%
Average Temperature: 49.8°F
Average Humidity: 69%
Chance of Rain: 0%
Wind: 2.5 mph
UV Index: 0.5
Wind: 2.5 mph
UV Index: 0.5
Air Quality
AQI:
2 - Moderate
PM2.5:
17.32 μg/m3
PM10:
18.96 μg/m3
Carbon Monoxide: 338.47 μg/m3
Nitrogen Dioxide: 35.13 μg/m3
Sulphur Dioxide: 3.42 μg/m3
Ozone: 14.85 μg/m3
Nitrogen Dioxide: 35.13 μg/m3
Sulphur Dioxide: 3.42 μg/m3
Ozone: 14.85 μg/m3
Astronomical
Sunrise: 7:01 AM
Sun Transit: 11:55 AM
Sunset: 4:51 PM
Daylight: 9 hrs 51 mins
Sun Transit: 11:55 AM
Sunset: 4:51 PM
Daylight: 9 hrs 51 mins
Moonrise: 10:21 AM
Moon Transit: 2:50 PM
Moonset: 7:23 PM
Moon Phase: Waxing Crescent
Moon Illumination: 8.5%
Moon Transit: 2:50 PM
Moonset: 7:23 PM
Moon Phase: Waxing Crescent
Moon Illumination: 8.5%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM2:20 PM - 4:50 PM
Minor Periods
6:53 PM - 8:23 PM9:51 AM - 11:21 AM
Action Rating: 3 out of 5
The times presented here are based upon the solunar theory, which is the idea that the movements of
fish and other animals are affected by the location of the sun and moon. The major periods are
believed to be the times of the greatest animal activity and occur when the moon is directly
overhead or underfoot (lunar transits). The minor periods also see increased activity and
occur when the moon is rising or setting. The strongest activity occurs during full or new moons,
and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.