Weather for San Francisco, California
Current Weather
Humidity: 66%
Heat Index: 51.3°F
Feels Like: 49°F
Wind: NE 3.7 mph
Wind Gusts: 8 mph
Wind Chill: 49°F
Dew Point: 49°F
Chance of Precipitation: 0%
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 10 mi
UV Index: 0
Five Day Weather Forecast
Sun
H: 58°F
L: 44°F
Mon
H: 60°F
L: 45°F
Tue
H: 59°F
L: 46°F
Wed
H: 55°F
L: 44°F
Thu
H: 57°F
L: 49°F
Air Quality
Nitrogen Dioxide: 57.85 μg/m3
Sulphur Dioxide: 4.65 μg/m3
Ozone: 9 μg/m3
Astronomical
Sun Transit: 12:11 AM
Sunset: 4:59 PM
Daylight: 9 hrs 34 mins
Moon Transit: 7:04 PM
Moonset: 12:54 AM
Moon Phase: First Quarter
Moon Illumination: 63.0%
Best Times for Fishing or Hunting
Major Periods
1:42 AM - 4:12 AM6:34 PM - 9:04 PM
Minor Periods
11:47 AM - 1:17 PM12:24 AM - 1:54 AM
Action Rating: 2 out of 5
Cold Weather Advisory issued December 28 at 11:13AM PST until December 29 at 9:00AM PST by NWS San Francisco CA
Effective: Sun December 28, 2025, 11:13 AM
Expires: Mon December 29, 2025, 9:00 AM
* WHAT...Cold conditions with temperatures as low as 34 expected. * WHERE...Interior Central Coast, The Santa Clara Valley and Eastern Hills, The East Bay Hills and Valleys, and North Bay Interior Valleys. * WHEN...From 1 AM to 9 AM PST Monday. * IMPACTS...Cold conditions will be hazardous to sensitive populations such as unhoused individuals. Prolonged exposure to the cold conditions will lead to hypothermia for people, pets, and livestock. Cold conditions may damage or kill sensitive crops, plants, and vegetation if appropriate precautions are not taken.
Ensure portable heaters are working properly and are used correctly to avoid sparking a fire indoors. Do not use generators or grills inside as carbon monoxide poisoning can result. Check with your local, city, or county officials for information on available warming centers. Be sure to dress in layers if outdoors. Make sure that pets and livestock have adequate food, unfrozen water, and warmth. Cover or tend to sensitive crops, plants, and vegetation.
Frost Advisory issued December 28 at 11:11AM PST until December 29 at 9:00AM PST by NWS Sacramento CA
Effective: Sun December 28, 2025, 11:11 AM
Expires: Mon December 29, 2025, 9:00 AM
* WHAT...Temperatures as low as 33 to 36 degrees will result in frost formation. * WHERE...Elevations below 2,000 feet in the Motherlode, Carquinez Strait and Delta, Central and Southern Sacramento Valley, and Northern San Joaquin Valley. * WHEN...From 1 AM to 9 AM PST Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS...Frost formation may be inhibited by northerly flow along and west of Interstate 5, or in areas where fog forms early on in the night.
Take steps now to protect tender plants from the cold.
Weather Forecast
Average Temperature: 49°F
Average Humidity: 77%
Wind: 9.6 mph
UV Index: 0.4
Air Quality
Nitrogen Dioxide: 43.86 μg/m3
Sulphur Dioxide: 7.02 μg/m3
Ozone: 21.32 μg/m3
Astronomical
Sun Transit: 12:11 AM
Sunset: 4:59 PM
Daylight: 9 hrs 34 mins
Moon Transit: 7:04 PM
Moonset: 12:54 AM
Moon Phase: First Quarter
Moon Illumination: 63.0%
Best Times for Fishing or Hunting
Major Periods
1:42 AM - 4:12 AM6:34 PM - 9:04 PM
Minor Periods
11:47 AM - 1:17 PM12:24 AM - 1:54 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 50.6°F
Average Humidity: 63%
Wind: 11.6 mph
UV Index: 0.4
Air Quality
Nitrogen Dioxide: 47.45 μg/m3
Sulphur Dioxide: 6.39 μg/m3
Ozone: 20.24 μg/m3
Astronomical
Sun Transit: 12:12 AM
Sunset: 4:59 PM
Daylight: 9 hrs 35 mins
Moon Transit: 7:57 PM
Moonset: 2:05 AM
Moon Phase: First Quarter
Moon Illumination: 73.5%
Best Times for Fishing or Hunting
Major Periods
2:31 AM - 5:01 AM7:27 PM - 9:57 PM
Minor Periods
12:17 AM - 1:47 PM1:35 AM - 3:05 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 51.1°F
Average Humidity: 76%
Wind: 10.7 mph
UV Index: 0.4
Air Quality
Nitrogen Dioxide: 49.19 μg/m3
Sulphur Dioxide: 6.15 μg/m3
Ozone: 10.44 μg/m3
Astronomical
Sun Transit: 12:12 AM
Sunset: 5:00 PM
Daylight: 9 hrs 35 mins
Moon Transit: 8:55 PM
Moonset: 3:20 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.8%
Best Times for Fishing or Hunting
Major Periods
3:25 AM - 5:55 AM8:25 PM - 10:55 PM
Minor Periods
12:53 AM - 2:23 PM2:50 AM - 4:20 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 48.1°F
Average Humidity: 89%
Wind: 11 mph
UV Index: 0.4
Air Quality
Nitrogen Dioxide: 45.38 μg/m3
Sulphur Dioxide: 5.79 μg/m3
Ozone: 8.92 μg/m3
Astronomical
Sun Transit: 12:12 AM
Sunset: 5:01 PM
Daylight: 9 hrs 36 mins
Moon Transit: 9:58 PM
Moonset: 4:38 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.5%
Best Times for Fishing or Hunting
Major Periods
4:25 AM - 6:55 AM9:28 PM - 11:58 PM
Minor Periods
1:39 PM - 3:09 PM4:08 AM - 5:38 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 52.6°F
Average Humidity: 87%
Wind: 10.5 mph
UV Index: 0
Air Quality
Nitrogen Dioxide: 39.04 μg/m3
Sulphur Dioxide: 6.31 μg/m3
Ozone: 21.69 μg/m3
Astronomical
Sun Transit: 12:13 AM
Sunset: 5:02 PM
Daylight: 9 hrs 37 mins
Moon Transit: 11:04 PM
Moonset: 5:54 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 96.0%
Best Times for Fishing or Hunting
Major Periods
5:30 AM - 8:00 AM12:00 AM - 12:00 AM
Minor Periods
2:36 PM - 4:06 PM5:24 AM - 6:54 AM
Action Rating: 2 out of 5