Normal weather for San Francisco in January
It's hot in January in San Francisco with an average temperature of 31°C. Temperatures this month range from a low of 31°C to a high of 32°C. At night, you can expect temperatures between 22°C and 23°C.
According to weather history, there is only 3,4 mm of precipitation in January. The wind speed is around 4 Bft, mostly coming from the East.
San Francisco in January |
New York | ||
|---|---|---|---|
 Average Temperature |
31°C | 5°C | |
 High Temp |
32°C | 11°C | |
| Low Temp |
31°C | 1°C | |
 Total Precipitation |
3,4 mm | 97 mm | |
| Rainy Days |
1 day | 12 days | |
Start of January
The month of January starts in San Francisco with hot temps, averaging around 31°C during the day and nights around 23°C. No precipitation expected at the start of the month; it’ll be sunny.
With the temperature difference between day and night, it’s smart to wear layers. For the daytime, light clothing like shorts or a dress, and a hat and sunglasses are perfect. In the evening and morning, a T-shirt, light pants or skirt, and a light jacket are ideal.
Mid January
By mid-January, daytime temps stay steady at around 31°C, with nights around 23°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
Since it cools down at night, it’s a good idea to wear layers. For the daytime, light clothing like shorts or a dress, and a hat and sunglasses are perfect. In the evening and morning, a T-shirt, light pants or skirt, and a light jacket are ideal.
End of January
By the end of January, the average daytime temperature in San Francisco is around 32°C, while nighttime temps are about 23°C. No precipitation expected at the end of the month; it’ll be mostly sunny. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is January a good time to visit San Francisco?
January is a good month to be in San Francisco for sunny weather. You’ll have high temperatures and not too much rain.
Temperature records for San Francisco in January
Check out the climate of San Francisco for all months and discover the best travel time
December
Daily Temperature in January in San Francisco
This chart shows the average daily high and low temperatures in January for San Francisco, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in January in San Francisco
The chart below shows the average daily precipitation in January for San Francisco, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for January, you can expect about 1 day of precipitation in San Francisco.
Daily UV Index in January in San Francisco
This chart shows the average daily UV index in January in San Francisco, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in January in San Francisco Over the Years
This chart shows the average temperature in January in San Francisco, measured in degrees Celsius, over the past few years.
Total Precipitation in January in San Francisco Over the Years
This chart shows the average precipitation in January in San Francisco, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily Climate in January for San Francisco
Click on any day in January to get detailed info about the usual weather on that day in San Francisco. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in January in San Francisco
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Average Weather in San Francisco by Month
Click on a month below to see detailed weather info for San Francisco. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of San Francisco for all months at once
