South San Francisco Weather in January
January in South San Francisco averages 14°C (57°F) during the day and 7°C (45°F) at night. Quite a bit of rainfall is typical this month, with around 73 mm (2.9 in) on average. An umbrella is a good idea.
Rainfall in South San Francisco in January
You can expect rain on around 9 days based on historical patterns, with 73 mm (2.9 in) average for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in South San Francisco in January
January in South San Francisco brings moderate temperatures, with highs of 14°C (57°F) and nights around 7°C (45°F). Conditions are often most pleasant around the middle of the day. Nights drop to 7°C (45°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in South San Francisco in January
The area enjoys a balanced 186 hours of sunlight, ensuring it's neither too overcast nor too sunny.
Wind Speed in South San Francisco in January
Average wind speeds reach 3 m/s (6 knots) in January, creating light breezes that feel pleasant throughout the day. Some days are calmer, while others bring slightly more active breezes.
Average water temperature in January
The water temperature is only 12°C (54°F) this month — cold enough that most people will want to stay out. Hardy swimmers may manage a quick dip, but it won't be comfortable.If you prefer enjoying temperate temperatures and rain-free days, May, June, July, August, September and October typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our South San Francisco's climate page.
South San Francisco Temperature in January
Min Temperature
7°C (45°F)
Max Temperature
14°C (57°F)
Water Temperature
12°C (54°F) *
Chance of Rain
30%
Precipitation
73 mm (2.9 in)
Rainy days
9 days
Humidity
80% *
Windspeed
3 m/s (6 knots) *
Sunshine
186 hours *
Percentage Sunshine
61% *
Best Places in the United States of America in January
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in January →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in South San Francisco in January
The weather can swing between comfortable and chilly in January, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. Wet weather is likely, so pack waterproof gear for multiple rainy days. Expect water temperatures of around 12°C (54°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in South San Francisco in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our South San Francisco's climate page.
