January weather forecast and climate
Mount Shasta, CA

The Lake Siskiyou on the base of Mount Shasta in California, and a view of the planted forest, the far suspension bridge, and snowy mountain peak
The Lake Siskiyou on the base of Mount Shasta in California, and a view of the planted forest, the far suspension bridge, and snowy mountain peak

Weather in January

January is a chilly winter month in Mount Shasta, California, with temperature in the range of an average low of 28.8°F (-1.8°C) and an average high of 43.2°F (6.2°C).

Temperature

In Mount Shasta, the average high-temperature is essentially the same as in December - a chilly 43.2°F (6.2°C). The average low-temperature, in Mount Shasta, is 28.8°F (-1.8°C).

Humidity

In Mount Shasta, the average relative humidity in January is 80%.

Rainfall

In Mount Shasta, in January, it is raining for 8.3 days, with typically 4.45" (113mm) of accumulated precipitation. Throughout the year, in Mount Shasta, there are 90.7 rainfall days, and 26.38" (670mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Mount Shasta are January through May, September through December. The month with the most snowfall is January when snow falls for 8.7 days and typically aggregates up to 19.21" (488mm) of snow.

Daylight

In Mount Shasta, the average length of the day is 9.6h.

Sunshine

The average sunshine in Mount Shasta is 5.6h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Mount Shasta. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 2 transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in January in Mount Shasta?

The average high-temperature, in January, in Mount Shasta, California, is 43.2°F (6.2°C), while the average low-temperature is 28.8°F (-1.8°C).

What is the average humidity in January in Mount Shasta?

The average relative humidity in January in Mount Shasta, California, is 80%.

How many days does it rain in January in Mount Shasta?

In Mount Shasta, California, in January, it is raining for 8.3 days, with typically 4.45" (113mm) of accumulated precipitation.

How many days does it snow in January in Mount Shasta?

In January, in Mount Shasta, California, it is snowing for 8.7 days. Throughout January, 19.21" (488mm) of snow is accumulated.

When does it snow the most in Mount Shasta?

January is the month with the most snowfall in Mount Shasta. Snow falls for 8.7 days and accumulates 19.21" (488mm) of snow.

How many hours of daylight does Mount Shasta have in January?

The average length of the day in January is 9.6h.

How many hours of sunshine does Mount Shasta have in January?

In January, the average sunshine in Mount Shasta, California, is 5.6h.

What is the month with the lowest UV index in Mount Shasta?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Mount Shasta, California.

How high is the UV index in January in Mount Shasta?

In January, the average daily maximum UV index in Mount Shasta, California, is 2. A UV Index estimate of 2, and below, represents a low health threat from unprotected exposure to the UV radiation.

Average temperature in January
Mount Shasta, CA

Average temperature in January - Mount Shasta, CA
  • Average high temperature in January: 43.2°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is December (40.8°F).

  • Average low temperature in January: 28.8°F

The month with the highest average low temperature is July (52.2°F).
The coldest month (with the lowest average low temperature) is December (27.1°F).

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Average pressure in January
Mount Shasta, CA

Average pressure in January - Mount Shasta, CA
  • Average pressure in January: 30.17"

The month with the highest atmospheric pressure is January (30.17").
Months with the lowest atmospheric pressure are June and August (29.94").

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Average wind speed in January
Mount Shasta, CA

Average wind speed in January - Mount Shasta, CA
  • Average wind speed in January: 5mph

The windiest month (with the highest average wind speed) is March (5.8mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).

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Average humidity in January
Mount Shasta, CA

Average humidity in January - Mount Shasta, CA
  • Average humidity in January: 80%

The month with the highest relative humidity is March (81%).
The month with the lowest relative humidity is August (45%).

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Average rainfall in January
Mount Shasta, CA

Average rainfall in January - Mount Shasta, CA
  • Average rainfall in January: 4.45"

The wettest month (with the highest rainfall) is March (4.69").
The driest month (with the least rainfall) is July (0.16").

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Average rainfall days in January
Mount Shasta, CA

Average rainfall days in January - Mount Shasta, CA
  • Average rainfall days in January: 8.3 days

The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is August (2.3 days).

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Average snowfall in January
Mount Shasta, CA

Average snowfall in January - Mount Shasta, CA
  • Average snowfall in January: 19.21"

The month with the highest snowfall is January (19.21").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in January
Mount Shasta, CA

Average snowfall days in January - Mount Shasta, CA
  • Average snowfall days in January: 8.7 days

The month with the highest number of snowfall days is December (10.9 days).
Months with the least snowfall days are July and August (0 days).

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Average daylight in January /
Average sunshine in January
Mount Shasta, CA

Average daylight in January / Average sunshine in January - Mount Shasta, CA
  • Average daylight in January: 9.6h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in January: 5.6h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.4h).

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Average sunshine days in January
Mount Shasta, CA

Average sunshine days in January - Mount Shasta, CA
  • Average sunshine days in January: 16.3 days

Months with the most sunshine days are July and August (25.7 days).
The month with the least sunshine days is March (12.3 days).

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Average UV index in January
Mount Shasta, CA

Average UV index in January - Mount Shasta, CA
  • Average UV index in January: 2

Months with the highest UV index are June and July (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in January
Mount Shasta, CA

Average cloud cover in January - Mount Shasta, CA
  • Average cloud cover in January: 41

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 6).

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Average visibility in January
Mount Shasta, CA

Average visibility in January - Mount Shasta, CA
  • Average visibility in January: 5mi

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

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