Weather for Saint Helena, California
Current Weather
Humidity: 83%
Feels Like: 56.5°F
Wind: WSW 4.9 mph
Wind Gusts: 9.5 mph
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 9 mi
UV Index: 0
Five Day Weather Forecast
Wed
H: 81°F
L: 54°F
Thu
H: 82°F
L: 54°F
Fri
H: 83°F
L: 54°F
Sat
H: 85°F
L: 52°F
Sun
H: 92°F
L: 49°F
Air Quality
Nitrogen Dioxide: 4.81 μg/m3
Sulphur Dioxide: 0.56 μg/m3
Ozone: 48 μg/m3
Astronomical
Sun Transit: 1:15 PM
Sunset: 8:28 PM
Daylight: 14 hrs 24 mins
Moon Transit: 12:24 AM
Moonset: 8:13 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.2%
Best Times for Fishing or Hunting
Major Periods
7:54 PM - 10:24 PM11:54 AM - 2:24 PM
Minor Periods
7:43 PM - 9:13 PM3:58 AM - 5:28 AM
Action Rating: 2 out of 5
Coastal Flood Advisory issued July 22 at 7:39PM PDT until July 23 at 1:00AM PDT by NWS San Francisco CA
Effective: Tue July 22, 2025, 7:39 PM
Expires: Wed July 23, 2025, 1:00 AM
* WHAT...Minor coastal flooding expected. * WHERE...San Francisco, North Bay Interior Valleys and San Francisco Bay Shoreline Counties. * WHEN...From 8 PM this evening to 1 AM PDT Wednesday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...Up to one foot inundation above ground level is possible in low lying areas near shorelines and tidal waterways. At the San Francisco tidal gauge high tide is expected to be 1.11 feet above normal (6.95 ft MLLW) at 9:57 PM PDT Tuesday. High tide timing varies up to 2 hours earlier or later along the coast and throughout the Bay.
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.
Coastal Flood Advisory issued July 22 at 7:39PM PDT until July 23 at 1:00AM PDT by NWS San Francisco CA
Effective: Tue July 22, 2025, 7:39 PM
Expires: Wed July 23, 2025, 1:00 AM
* WHAT...Minor coastal flooding expected. * WHERE...San Francisco, North Bay Interior Valleys and San Francisco Bay Shoreline Counties. * WHEN...From 8 PM this evening to 1 AM PDT Wednesday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...Up to one foot inundation above ground level is possible in low lying areas near shorelines and tidal waterways. At the San Francisco tidal gauge high tide is expected to be 1.11 feet above normal (6.95 ft MLLW) at 9:57 PM PDT Tuesday. High tide timing varies up to 2 hours earlier or later along the coast and throughout the Bay.
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.
Coastal Flood Advisory issued July 22 at 7:39PM PDT until July 23 at 1:00AM PDT by NWS San Francisco CA
Effective: Tue July 22, 2025, 7:39 PM
Expires: Wed July 23, 2025, 1:00 AM
* WHAT...Minor coastal flooding expected. * WHERE...San Francisco, North Bay Interior Valleys and San Francisco Bay Shoreline Counties. * WHEN...From 8 PM this evening to 1 AM PDT Wednesday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...Up to one foot inundation above ground level is possible in low lying areas near shorelines and tidal waterways. At the San Francisco tidal gauge high tide is expected to be 1.11 feet above normal (6.95 ft MLLW) at 9:57 PM PDT Tuesday. High tide timing varies up to 2 hours earlier or later along the coast and throughout the Bay.
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.
Coastal Flood Advisory issued July 22 at 7:39PM PDT until July 23 at 1:00AM PDT by NWS San Francisco CA
Effective: Tue July 22, 2025, 7:39 PM
Expires: Wed July 23, 2025, 1:00 AM
* WHAT...Minor coastal flooding expected. * WHERE...San Francisco, North Bay Interior Valleys and San Francisco Bay Shoreline Counties. * WHEN...From 8 PM this evening to 1 AM PDT Wednesday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...Up to one foot inundation above ground level is possible in low lying areas near shorelines and tidal waterways. At the San Francisco tidal gauge high tide is expected to be 1.11 feet above normal (6.95 ft MLLW) at 9:57 PM PDT Tuesday. High tide timing varies up to 2 hours earlier or later along the coast and throughout the Bay.
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.
Weather Forecast
Average Temperature: 66.2°F
Average Humidity: 71%
Wind: 11.6 mph
UV Index: 2.5
Air Quality
Nitrogen Dioxide: 4.44 μg/m3
Sulphur Dioxide: 0.86 μg/m3
Ozone: 57.04 μg/m3
Astronomical
Sun Transit: 1:15 PM
Sunset: 8:28 PM
Daylight: 14 hrs 24 mins
Moon Transit: 12:24 AM
Moonset: 8:13 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.2%
Best Times for Fishing or Hunting
Major Periods
7:54 PM - 10:24 PM11:54 AM - 2:24 PM
Minor Periods
7:43 PM - 9:13 PM3:58 AM - 5:28 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 64.8°F
Average Humidity: 73%
Wind: 11.6 mph
UV Index: 2.5
Air Quality
Nitrogen Dioxide: 5.28 μg/m3
Sulphur Dioxide: 0.84 μg/m3
Ozone: 56.92 μg/m3
Astronomical
Sun Transit: 1:15 PM
Sunset: 8:27 PM
Daylight: 14 hrs 22 mins
Moon Transit: 1:22 PM
Moonset: 8:53 PM
Moon Phase: New
Moon Illumination: 0.4%
Best Times for Fishing or Hunting
Major Periods
8:50 PM - 11:20 PM12:52 AM - 3:22 PM
Minor Periods
8:23 PM - 9:53 PM5:11 AM - 6:41 AM
Action Rating: 5 out of 5
Weather Forecast
Average Temperature: 65.2°F
Average Humidity: 73%
Wind: 11.9 mph
UV Index: 2.5
Air Quality
Nitrogen Dioxide: 3.92 μg/m3
Sulphur Dioxide: 0.69 μg/m3
Ozone: 62.2 μg/m3
Astronomical
Sun Transit: 1:15 PM
Sunset: 8:26 PM
Daylight: 14 hrs 21 mins
Moon Transit: 2:15 PM
Moonset: 9:24 PM
Moon Phase: New
Moon Illumination: 3.1%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM1:45 PM - 4:15 PM
Minor Periods
8:54 PM - 10:24 PM6:24 AM - 7:54 AM
Action Rating: 5 out of 5
Weather Forecast
Average Temperature: 65.8°F
Average Humidity: 66%
Wind: 11.4 mph
UV Index: 2.6
Air Quality
Nitrogen Dioxide: 5.44 μg/m3
Sulphur Dioxide: 0.74 μg/m3
Ozone: 51.69 μg/m3
Astronomical
Sun Transit: 1:15 PM
Sunset: 8:25 PM
Daylight: 14 hrs 19 mins
Moon Transit: 3:03 PM
Moonset: 9:51 PM
Moon Phase: New
Moon Illumination: 0.7%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM2:33 PM - 5:03 PM
Minor Periods
9:21 PM - 10:51 PM7:33 AM - 9:03 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 63.3°F
Average Humidity: 68%
Wind: 10.3 mph
UV Index: 0
Air Quality
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
Sun Transit: 1:15 PM
Sunset: 8:25 PM
Daylight: 14 hrs 17 mins
Moon Transit: 3:47 PM
Moonset: 10:14 PM
Moon Phase: New
Moon Illumination: 3.8%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM3:17 PM - 5:47 PM
Minor Periods
9:44 PM - 11:14 PM8:39 AM - 10:09 AM
Action Rating: 3 out of 5