Weather in San Diego County, United States in January

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

January is a slightly cold and dry time for sunbathing in San Diego County. January is a little too cold to enjoy swimming in San Diego County for any length of time. Consider visiting San Diego 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 Diego County in January

The average maximum temperature in San Diego County in January is 19°. The average maximum temperature is 18° in the previous month and 18° in the next month.

The average temperature in San Diego County in January is 13°. The average temperature ranges is 13° in the previous month and 13° in the next month.

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

Sunshine in San Diego County in January

The average day light hours per day in San Diego County in January are 10.2 and there are 7.2 hours of sunshine per day on average during January making it a quite sunny month with some cloud cover.

The ultraviolet index in San Diego County in January is typically 3.8 during January. An ultraviolet index reading of 3 to 5 indicates there is a moderate risk of harm from unprotected sun exposure. Keep out of the sun during the strongest hours around midday when unprotected skin risks burning in less than 30 minutes. For the sensitive wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days, and after swimming or sweating. Tanning for hours is possible with the right application of sun cream. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in San Diego County in January

The average sea water temperature in San Diego County in January is 17.4° which is cool for swimming, shorty wetsuit may help you extend your time in the water.

Rainfall in San Diego County in January

The average total rainfall in San Diego County in January is 10.6cm and on average there are 7.6 rainy days in January making it a dry time to visit the beach.

Humidity in San Diego County in January

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

The average maximum relative humidity in San Diego County in January is typically 81.6%. The maximum relative humidity is 85.2% in the previous month and 86.7% in the next month.

The average relative humidity in San Diego County in January is typically 61.8%. The average relative humidity is 66.1% in the previous month and 68.3% in the next month.

Wind Speed in San Diego County in January

The average maximum wind speed in San Diego County in January is typically 18kmh. The average maximum wind speed is 18kmh in the previous month and 20kmh in the next month.

The average wind speed in San Diego County in January is typically 7kmh. The average wind speed is 8kmh in the previous month and 8kmh in the next month.

The average wind direction in San Diego County in January is from the East-Southeast.

Monthly Averages

Suggested Beaches in January

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