January weather forecast
San Anselmo, CA

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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 indicates an average high-temperature of a still mild 56.1°F (13.4°C) in January, showing minor variation from December's 55.4°F (13°C). San Anselmo experiences an average nighttime temperature of 45.5°F (7.5°C) in the month of January.

Humidity

In San Anselmo, the average relative humidity in January is 74%.

Rainfall

In San Anselmo, in January, it is raining for 5.9 days, with typically 0.59" (15mm) of accumulated precipitation. In San Anselmo, during the entire year, the rain falls for 48 days and collects up to 3.94" (100mm) of precipitation.

Daylight

In January, the average length of the day 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

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 estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum daily UV index of 3 in January converts into the following recommendations:
Exercise prevention - Warding off sunburn is urged. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
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Frequently asked questions

What are the temperatures in San Anselmo in January?

The high-temperature, in January, in San Anselmo, is 56.1°F (13.4°C), while the low-temperature averages to 45.5°F (7.5°C).

What is the average humidity in January in San Anselmo?

The average relative humidity in January is 74%.

How much does it rain in San Anselmo in January?

In San Anselmo, in January, it is raining for 5.9 days, with typically 0.59" (15mm) of accumulated precipitation.

What is the average length of the day in January in San Anselmo?

In January, the average day length in San Anselmo, California, is 9h and 53min.

When are sunrise and sunset in January in San Anselmo?

In January, on the first day of the month, sunrise is at 7:26 am and sunset at 5:01 pm. On the last day of the month, in San Anselmo, California, sunrise is at 7:15 am and sunset at 5:31 pm PST.

How many hours of sunshine does San Anselmo have in January?

In San Anselmo, the average sunshine duration in January is 5.7h.

What are the months with the lowest UV index in San Anselmo?

The months with the lowest UV index in San Anselmo, California, are January, February, November and December, with an average maximum UV index of 3.

What is the UV index intensity in January in San Anselmo?

In January, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
San Anselmo, CA

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).

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Average pressure in January
San Anselmo, CA

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).

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Average wind speed in January
San Anselmo, CA

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).

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Average humidity in January
San Anselmo, CA

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%).

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Average rainfall in January
San Anselmo, CA

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").

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Average rainfall days in January
San Anselmo, CA

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).

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Average daylight in January /
Average sunshine in January
San Anselmo, CA

Average daylight in January / Average sunshine in January - San Anselmo, CA
  • Average daylight in January: 9h and 5min

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 4min

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).

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Average sunshine days in January
San Anselmo, CA

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).

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Average UV index in January
San Anselmo, CA

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).

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Average cloud cover in January
San Anselmo, CA

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).

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Average visibility in January
San Anselmo, CA

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).

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San Anselmo, California, USA

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