January weather forecast and climate
Upper Lake, CA

Weather in January

January, the same as December, is a cool winter month in Upper Lake, California, with average temperature ranging between min 38.7°F (3.7°C) and max 54.7°F (12.6°C).

Temperature

In January, the average high-temperature is essentially the same as in December - a still cool 54.7°F (12.6°C). The average low-temperature, in January, is 38.7°F (3.7°C).

Humidity

The average relative humidity in Upper Lake, California, is 72%.

Rainfall

In Upper Lake, it is raining for 11.6 days, with typically 3.74" (95mm) of accumulated precipitation. Throughout the year, in Upper Lake, there are 92 rainfall days, and 21.02" (534mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall. Months with the most snowfall are January and February, with an average 0.47" (12mm) of accumulated snow.

Daylight

In January, the average length of the day in Upper Lake is 9.8h.

Sunshine

In Upper Lake, the average sunshine is 5.4h.

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 reading of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 3 in January transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in January in Upper Lake?

In January, the average relative humidity is 72%.

How much does it rain in Upper Lake in January?

In Upper Lake, during January, the rain falls for 11.6 days and regularly aggregates up to 3.74" (95mm) of precipitation.

When does it snow the most in Upper Lake?

Months with the most snowfall are January and February, with an average 0.47" (12mm) of accumulated snow.

How much does it snow in Upper Lake in January?

In Upper Lake, in January, snow falls for 0.2 days, with typically accumulated 0.47" (12mm) of snow.

How many hours of daylight does Upper Lake have in January?

In January, the average length of the day in Upper Lake is 9.8h.

How many hours of sunshine does Upper Lake have in January?

The average sunshine in January in Upper Lake, California, is 5.4h.

What are the months with the lowest UV index in Upper Lake?

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

How high is the UV index in January in Upper Lake?

In January, the average daily maximum UV index in Upper Lake is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV rays.

Average temperature in January
Upper Lake, CA

Average temperature in January - Upper Lake, CA
  • Average high temperature in January: 54.7°F

The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is December (52.3°F).

  • Average low temperature in January: 38.7°F

The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is December (37.2°F).

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Average pressure in January
Upper Lake, CA

Average pressure in January - Upper Lake, CA
  • Average pressure in January: 30.14"

The month with the highest atmospheric pressure is January (30.14").
Months with the lowest atmospheric pressure are June and August (29.91").

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Average wind speed in January
Upper Lake, CA

Average wind speed in January - Upper Lake, CA
  • Average wind speed in January: 4.5mph

The windiest month (with the highest average wind speed) is April (5.3mph).
The calmest month (with the lowest average wind speed) is November (4.1mph).

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Average humidity in January
Upper Lake, CA

Average humidity in January - Upper Lake, CA
  • Average humidity in January: 72%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (47%).

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Average rainfall in January
Upper Lake, CA

Average rainfall in January - Upper Lake, CA
  • Average rainfall in January: 3.74"

The wettest month (with the highest rainfall) is February (4.06").
The driest month (with the least rainfall) is July (0.04").

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Average rainfall days in January
Upper Lake, CA

Average rainfall days in January - Upper Lake, CA
  • Average rainfall days in January: 11.6 days

The month with the highest number of rainy days is March (15.9 days).
Months with the least rainy days are July and August (1.3 days).

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Average snowfall in January
Upper Lake, CA

Average snowfall in January - Upper Lake, CA
  • Average snowfall in January: 0.47"

Months with the highest snowfall are January and February (0.47").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in January
Upper Lake, CA

Average snowfall days in January - Upper Lake, CA
  • Average snowfall days in January: 0.2 days

The month with the highest number of snowfall days is February (0.9 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in January /
Average sunshine in January
Upper Lake, CA

Average daylight in January / Average sunshine in January - Upper Lake, CA
  • Average daylight in January: 9.8h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in January: 5.4h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 5.3h).

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Average sunshine days in January
Upper Lake, CA

Average sunshine days in January - Upper Lake, CA
  • Average sunshine days in January: 18 days

Months with the most sunshine days are July and August (28.3 days).
The month with the least sunshine days is March (13.7 days).

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Average UV index in January
Upper Lake, CA

Average UV index in January - Upper Lake, CA
  • Average UV index in January: 3

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in January
Upper Lake, CA

Average cloud cover in January - Upper Lake, CA
  • Average cloud cover in January: 41

The month with the most cloud cover is March (Cloud cover 44).
Months with the least cloud cover are July and August (Cloud cover 5).

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Average visibility in January
Upper Lake, CA

Average visibility in January - Upper Lake, CA
  • Average visibility in January: 6mi

Months with the highest visibility are January, February, April, May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are March and December (5mi).

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