San Francisco Weather In January
The hottest January day in San Francisco for the past 83 years was 71 degrees Fahrenheit, most recently registered on January 30, 1976, and the normal high is 56. The coldest day reported in San Francisco in January for the past 83 years was 26 measured on January 5, 1949, while the average low temperature is 43.
United States National Weather Service historical San Francisco January Weather data shows that on January 10, 1949, the high temperature did not exceed 39 degrees Fahrenheit, the lowest high measured in San Francisco in the past 83 years. The Weather Service additionally shows that on January 1, 1997, the low for the day did not drop below 62 degrees, the highest low temperature in San Francisco in the last 83 years.
Weather Service historical data shows that the average daily high temperature in San Francisco on January First is 67 degrees Fahrenheit and the average high on the last day of January is 64 degrees. The low measured temperature in San Francisco on January First averages 50 degrees and the low on the last day of the month averages 48 degrees.
San Francisco typically receives an average of 4.45 inches of precipitation during the month. According to January San Francisco Weather records, the most rain measured in a single day in January was 5.58 inches on January 4, 1982.