Weather in San Mateo County, United States in January

So you're interested in going to San Mateo County, United States in January

January is a cold and dry time for sunbathing in San Mateo County and not really recommended. January is too cold for swimming in San Mateo County for any length of time, unless you have a wetsuit. Consider visiting San Mateo County in the months of June, July, August, September, for the best beach weather. Also consider one of our other suggestions for January.

Temperature in San Mateo County in January

The average maximum temperature in San Mateo County in January is 15°. The average maximum temperature is 14° in the previous month and 14° in the next month.

The average temperature in San Mateo County in January is 10°. The average temperature ranges is 10° in the previous month and 10° in the next month.

The average minimum temperature in San Mateo County in January is . The minimum temperature is in the previous month and in the next month.

Sunshine in San Mateo County in January

The average day light hours per day in San Mateo County in January are 9.9 and there are 5.4 hours of sunshine per day on average during January making it a sunny month that is overcast at times.

The ultraviolet index in San Mateo County in January is typically 2.6 during January. An ultraviolet index reading of 0 to 2 indicates low danger from the sun's UV rays for the average person. Most people will be able to spend several hours in the sun with out a problem, however unprotected skin risks burning in less than 1 hour. Wear sunglasses on bright days. Only those that burn easily will need to apply sunscreen. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in San Mateo County in January

The average sea water temperature in San Mateo County in January is 15.2° which is cold for swimming, a full wet suit is required to spend any length of time in the sea.

Rainfall in San Mateo County in January

The average total rainfall in San Mateo County in January is 1.2cm and on average there are 8.7 rainy days in January making it a dry time to visit the beach.

Humidity in San Mateo County in January

The maximum dew point (an indicator of humidity) in San Mateo County in January is which is a bit dry for some. The dew point is in the previous month and 10° in the next month.

The average maximum relative humidity in San Mateo County in January is typically 93.3%. The maximum relative humidity is 93.6% in the previous month and 97.2% in the next month.

The average relative humidity in San Mateo County in January is typically 76.6%. The average relative humidity is 78% in the previous month and 83.6% in the next month.

Wind Speed in San Mateo County in January

The average maximum wind speed in San Mateo County in January is typically 26kmh. The average maximum wind speed is 27kmh in the previous month and 29kmh in the next month.

The average wind speed in San Mateo County in January is typically 9kmh. The average wind speed is 11kmh in the previous month and 12kmh in the next month.

The average wind direction in San Mateo County in January is from the North.

Monthly Averages

Suggested Beaches in January

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