January weather forecastSan Anselmo, CA
January
Weather in January
Starting the year, January sees one of the lowest average temperatures in San Anselmo, California, with minimums hovering at 45.5°F (7.5°C) and highs reaching 56.1°F (13.4°C). The combination of humidity at 74% and significant cloud coverage of 36% makes for quite overcast conditions. The breeze is gentle, and visibility remains steady at six miles throughout the month. As winter is in full swing, the days are relatively short coupled with moderate sunshine duration. Even though the possibilities of precipitation are moderate, rainfall amounts to 0.59" (15mm) on average.Temperature
San Anselmo measures an average high-temperature of a still refreshing 56.1°F (13.4°C) in January, nearly consistent with the preceding month. In January, San Anselmo's temperature tends to fall to an average low of 45.5°F (7.5°C) during the night.Humidity
In San Anselmo, the average relative humidity in January is 74%.Rainfall
In San Anselmo, in January, during 5.9 rainfall days, 0.59" (15mm) of precipitation is typically accumulated. In San Anselmo, during the entire year, the rain falls for 48 days and collects up to 3.94" (100mm) of precipitation.Daylight
In San Anselmo, the average length of the day in January is 9h and 53min.On the first day of January, sunrise is at 7:26 am and sunset at 5:01 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 5:31 pm PST.
Sunshine
In San Anselmo, the average sunshine in January is 5.7h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 3 during January leads to these advisories:
Prioritize safety - Suggestions to prevent sun damage are offered. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
San Anselmo, CA
- Average high temperature in January: 56.1°F
The warmest month (with the highest average high temperature) is September (72.3°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in January: 45.5°F
The month with the highest average low temperature is September (56.1°F).
The coldest month (with the lowest average low temperature) is December (45.3°F).
Average pressure in January
San Anselmo, CA
- Average pressure in January: 30.13"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in January
San Anselmo, CA
- Average wind speed in January: 6mph
The windiest month (with the highest average wind speed) is May (7.8mph).
The calmest months (with the lowest average wind speed) are October and November (5.5mph).
Average humidity in January
San Anselmo, CA
- Average humidity in January: 74%
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is October (68%).
Average rainfall in January
San Anselmo, CA
- Average rainfall in January: 0.59"
The wettest month (with the highest rainfall) is February (0.87").
The driest months (with the least rainfall) are June, July, August and September (0.04").
Average rainfall days in January
San Anselmo, CA
- Average rainfall days in January: 5.9 days
The month with the highest number of rainy days is March (8.8 days).
The months with the least rainy days are June and August (1.2 days).
Average daylight in January /
Average sunshine in January
San Anselmo, CA
- Average daylight in January: 9h and 54min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January: 5h and 42min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in January
San Anselmo, CA
- Average sunshine days in January: 24.2 days
The month with the most sunshine days is June (26.4 days).
The month with the least sunshine days is March (20.7 days).
Average UV index in January
San Anselmo, CA
- Average UV index in January: 3
The months with the highest UV index are April, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in January
San Anselmo, CA
- Average cloud cover in January: 36
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 19).
Average visibility in January
San Anselmo, CA
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
