January weather forecast
San Rafael, CA

Share

Weather in January

January, like December, is another mild winter month in San Rafael, California, with an average temperature fluctuating between 45.5°F (7.5°C) and 56.1°F (13.4°C).

Temperature

The beginning of January records an average high-temperature of a still refreshing 56.1°F (13.4°C), almost echoing the conditions of the previous month. Throughout the month of January, the nighttime temperature in San Rafael dips to an average of 45.5°F (7.5°C).

Humidity

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

Rainfall

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

Daylight

In San Rafael, California, the average length of the day in January is 9h and 53min.
On the first day of the month, sunrise is at 7:25 am and sunset at 5:01 pm. On the last day of January, sunrise is at 7:15 am and sunset at 5:31 pm PST.

Sunshine

The average sunshine in January is 5.7h.

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum UV index of 3 in January translates into the following recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
[Resources]

Frequently asked questions

What are January temperatures in San Rafael?

During January, San Rafael experiences an average high-temperature of 56.1°F (13.4°C) and a low-temperature of 45.5°F (7.5°C).

What is the average humidity in January in San Rafael?

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

How much does it rain in San Rafael in January?

In San Rafael, in January, during 5.9 rainfall days, 0.59" (15mm) of precipitation is typically accumulated.

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

The average day length in January in San Rafael is 9h and 53min.

When is the sunrise / sunset in January in San Rafael?

On the first day of January, sunrise is at 7:25 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.

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

The average sunshine duration in January in San Rafael is 5.7h.

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

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

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

In January, the average daily maximum UV index in San Rafael is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability 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 Rafael, CA

Average temperature in January - San Rafael, 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).

[Resources]

Average pressure in January
San Rafael, CA

Average pressure in January - San Rafael, 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).

[Resources]

Average wind speed in January
San Rafael, CA

Average wind speed in January - San Rafael, 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).

[Resources]

Average humidity in January
San Rafael, CA

Average humidity in January - San Rafael, 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%).

[Resources]

Average rainfall in January
San Rafael, CA

Average rainfall in January - San Rafael, 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").

[Resources]

Average rainfall days in January
San Rafael, CA

Average rainfall days in January - San Rafael, 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).

[Resources]

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

Average daylight in January / Average sunshine in January - San Rafael, 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).

[Resources]

Average sunshine days in January
San Rafael, CA

Average sunshine days in January - San Rafael, 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).

[Resources]

Average UV index in January
San Rafael, CA

Average UV index in January - San Rafael, 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).

[Resources]

Average cloud cover in January
San Rafael, CA

Average cloud cover in January - San Rafael, 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).

[Resources]

Average visibility in January
San Rafael, CA

Average visibility in January - San Rafael, 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).

[Resources]

San Rafael, California, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location