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San Francisco Weather in January
January in San Francisco averages 26°C (79°F) during the day and 21°C (70°F) at night. The excellent conditions and low rainfall make it a solid month to visit.
Rainfall in San Francisco in January
Typically around a single day of rainfall are expected, averaging 28 mm (1.1 in) for the month. On the rare occasion it does rain, the shower can be quite heavy given the low total spread across a single day.
Temperature in San Francisco in January
The temperature in San Francisco in January is excellent. Daytime highs reach 26°C (79°F), with nights dropping to 21°C (70°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With lows of 21°C (70°F), the nights are warm and generally comfortable.So this is a great month to visit if you prefer dry days with pleasant temperatures.
San Francisco Temperature in January
Min Temperature
21°C (70°F)
Max Temperature
26°C (79°F)
Chance of Rain
5%
Precipitation
28 mm (1.1 in)
Rainy days
a single day
Humidity
67% *
* Data from: Puerto Vallarta, Mexico (37 KM, 23 Miles).
San Francisco Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San Francisco - and find the best time to visit.
Best Places in Mexico in January
Find out more about the weather in Mexico and which places have the best travel conditions in this month. See all of Mexico in January →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in San Francisco in January
Warm weather calls for comfortable, breathable clothing in January. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Some rain is possible, so pack something to handle light showers.
What To Do in San Francisco in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling8/10 -
Walking8/10 -
Camping10/10 -
Outdoor sports8/10
San Francisco 3-Day Forecast
More climate data for San Francisco
See the full San Francisco climate overview or explore weather in Mexico.
Popular in January
Where to go in January - average daytime high across popular destinations.
Playa del Carmen
27°C (81°F) Tulum27°C (81°F) Puerto Vallarta
26°C (79°F) Cancún27°C (81°F) Los Cabos26°C (79°F) Mexico City21°C (70°F) Puerto Peñasco20°C (68°F) Bucket list
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