January Weather in San Francisco

Last updated: March 2, 2024

The weather in San Francisco, Peru, during January is characterized by an average temperature of 16°C (61°F). Highs can soar to 24°C (75°F), while lows may dip to 11°C (52°F). Typically, the humidity level in San Francisco throughout January hovers around 93%.

11°C (52°F)

Minimum temperature

16°C (61°F)

Average temperature

24°C (75°F)

Maximum temperature

93%

Humidity

Precipitation and Sunshine hours

In January, San Francisco averages 408 mm (16.0 inches) of rainfall, typically over the course of 24 rainy days. The month enjoys an average of 12 hours 45 minutes of daylight, with the sun shining for approximately 6 hours 44 minutes each day. Additionally, there is a 8% probability of sunny days during this period.

408 mm (16.0 inches)

Precipitation

24 rainy days

Rainy days

6 hours 44 minutes

Sunshine hours

8%

Chance of sun

UV Index

In January, the UV Index in San Francisco reaches a maximum of 17, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 10 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 2 4 8 12 16 17 16 13 8 4 1 1 0
Exposure Low Moderate VeryHigh Extreme VeryHigh Moderate Low
Time to burn 45 min 30 min 15 min 10 min 15 min 30 min 45 min

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