Avg High
San Francisco in January
Verdict
In San Francisco, January has a distinct winter feel. As the season moves along, conditions remain fairly consistent. You can usually expect a cool month that feels variable day to day. It often has a mild but frequently damp, typical of changeable seasons feel, especially for outdoor plans.
It suits travellers who want straightforward weather for sightseeing and day trips. Lookouts and coastal walks can feel sharper when the wind is up.
Avg Low
Rain
Daylight
10h
What to expect
- Daytime feel - Cool days with a noticeable cool-down after sunset. It often feels a touch cooler in the shade.
- Wet weather - Expect plenty of wet weather. Expect damp surfaces and slick paths. Wet breaks can interrupt outdoor plans.
- Midday sun - Sun is noticeable. You'll feel fine, but it's still easy to get caught out. This is a 'don't forget the hat' month.
- Exposure - Refreshing breezes, and expect sharp gusts that can change plans in exposed areas. On the water or higher ground it feels stronger.
January in context
How it compares to the rest of the year in San Francisco.
Hottest (avg)
#11 / 12
Wettest (avg)
#2 / 12
Daylight Hours
#11 / 12
Windiest (avg)
#10 / 12
Highest UV
#11 / 12
Most Humid
#1 / 12
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight
- 9.9 hours
- UV index (max)
- 4
- Typical sun hours
- 07:21 – 17:15
Rain & Snow
- Total
-
- Rainy days
- 12
- Cloud cover
- 62%
- Snowfall
-
Humidity & Wind
- Humidity (avg)
- 83%
- Wind (avg)
-
- Wind (max gusts)
-
Frequently asked questions
Is January a good time to visit San Francisco?
Typical January days in San Francisco reach highs of 14°C (57°F) with nights around 7°C (45°F). It usually feels cool by day and cold after dark. It is among the wetter months, so it is wise to have some indoor backup plans or flexible activities.
What are temperatures like in January?
Daytime temperatures in January typically peak near 14°C (57°F), while nights drop to around 7°C (45°F). Expect cool afternoons and cold evenings.
How much does it rain in January?
Rainfall in January averages 126 mm (5.0 in) across roughly 12 days. Overall it is a quite rainy time of year, so a light rain jacket and waterproof shoes are very handy.
How many hours of daylight are there in January?
You can expect about 10 hours of daylight in January. Sunrise is typically around 07:21 and sunset near 17:15. Days are on the shorter side, so plan activities around limited daylight.
How strong is the sun in January?
UV levels are moderate (around 4); sunscreen and sunglasses are still a good idea.
Is it windy in January?
In January, average wind speeds are around 13 km/h (8 mph), with gusts on the windiest days reaching about 59 km/h (37 mph). On the ground, it is it can feel quite windy at times, particularly when weather systems move through.