January weather forecast
Mammoth Lakes, CA

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Perfect water reflections of trees, rocks, and distant mountains in the clear water of Mammoth Lakes, California
Perfect water reflections of trees, rocks, and distant mountains in the clear water of Mammoth Lakes, California

Weather in January

January sees the emergence of weather in Mammoth Lakes, California that is both cold and wet, setting the stage for the rest of winter. High temperatures average at around 35.6°F (2°C), dipping to a chilly 16.5°F (-8.6°C) at night. A quaint chill fills the air as the clouds roll in with a relatively high probability of rain. Snowfall during this period is anticipated, making January a popular choice for snow sports enthusiasts. The city becomes a hub for fun winter activities in the cool weather.

Temperature

The advent of January brings an average high-temperature of a still wintry 35.6°F (2°C), almost identical to the preceding month. The month of January records an average low-temperature of 16.5°F (-8.6°C) in Mammoth Lakes, California.

Humidity

In Mammoth Lakes, the average relative humidity in January is 72%.

Rainfall

In Mammoth Lakes, in January, it is raining for 4.3 days, with typically 0.67" (17mm) of accumulated precipitation. In Mammoth Lakes, California, during the entire year, the rain falls for 47.7 days and collects up to 4.92" (125mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall. In Mammoth Lakes, in January, snow falls for 9.1 days, with typically accumulated 4.21" (107mm) of snow. In Mammoth Lakes, during the entire year, snow falls for 60.8 days and aggregates up to 28.58" (726mm) of snow.

Daylight

In Mammoth Lakes, the average length of the day in January is 9h and 55min.
On the first day of the month, sunrise is at 7:10 am and sunset at 4:47 pm. On the last day of January, in Mammoth Lakes, sunrise is at 7:00 am and sunset at 5:18 pm PST.

Sunshine

January has the least sunshine of the year, with an average of 6.3h of sunshine.

UV index

The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In January, an average UV index of 2 transforms into the following instructions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Stay sun-safe with clothing that is both closely woven and worn loosely. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
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Frequently asked questions

How cold is it in Mammoth Lakes in January?

The high-temperature, in January, in Mammoth Lakes, is 35.6°F (2°C), while the low-temperature averages to 16.5°F (-8.6°C).

What is the average humidity in January in Mammoth Lakes?

The average relative humidity in January in Mammoth Lakes, California, is 72%.

How many days does it rain in January in Mammoth Lakes?

In Mammoth Lakes, California, in January, it is raining for 4.3 days, with typically 0.67" (17mm) of accumulated precipitation.

How much does it snow in Mammoth Lakes in January?

In January, in Mammoth Lakes, it is snowing for 9.1 days. Throughout January, 4.21" (107mm) of snow is accumulated.

How many hours of daylight does Mammoth Lakes have in January?

In January, the average day length in Mammoth Lakes is 9h and 55min.

When are sunrise and sunset in January in Mammoth Lakes?

On the first day of January in Mammoth Lakes, California, sunrise is at 7:10 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 5:18 pm PST.

What is the month with the least sunshine in Mammoth Lakes?

The month with the least sunshine in Mammoth Lakes is January, with an average of 6.3h of sunshine.

How many hours of sunshine does Mammoth Lakes have in January?

In January, the average sunshine duration is 6.3h.

What is the month with the lowest UV index in Mammoth Lakes?

The months with the lowest UV index in Mammoth Lakes, California, are January through April, October through December, with an average maximum UV index of 2.

How high is the UV index in January in Mammoth Lakes?

In January, the average daily maximum UV index in Mammoth Lakes, California, is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Mammoth Lakes, CA

Average temperature in January - Mammoth Lakes, CA
  • Average high temperature in January: 35.6°F

The warmest month (with the highest average high temperature) is July (73.4°F).
The month with the lowest average high temperature is February (34°F).

  • Average low temperature in January: 16.5°F

The month with the highest average low temperature is July (48.2°F).
The coldest month (with the lowest average low temperature) is February (14.9°F).

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Average pressure in January
Mammoth Lakes, CA

Average pressure in January - Mammoth Lakes, CA
  • Average pressure in January: 30.16"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in January
Mammoth Lakes, CA

Average wind speed in January - Mammoth Lakes, CA
  • Average wind speed in January: 5.7mph

The windiest month (with the highest average wind speed) is March (6.9mph).
The calmest months (with the lowest average wind speed) are July and August (4.9mph).

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Average humidity in January
Mammoth Lakes, CA

Average humidity in January - Mammoth Lakes, CA
  • Average humidity in January: 72%

The month with the highest relative humidity is February (76%).
The month with the lowest relative humidity is August (34%).

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Average rainfall in January
Mammoth Lakes, CA

Average rainfall in January - Mammoth Lakes, CA
  • Average rainfall in January: 0.67"

The wettest month (with the highest rainfall) is February (0.94").
The driest months (with the least rainfall) are August and October (0.08").

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Average rainfall days in January
Mammoth Lakes, CA

Average rainfall days in January - Mammoth Lakes, CA
  • Average rainfall days in January: 4.3 days

The month with the highest number of rainy days is April (6.3 days).
The month with the least rainy days is August (1.8 days).

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Average snowfall in January
Mammoth Lakes, CA

Average snowfall in January - Mammoth Lakes, CA
  • Average snowfall in January: 4.21"

The month with the highest snowfall is February (5.67").
The months with the least snowfall are July and August (0").

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Average snowfall days in January
Mammoth Lakes, CA

Average snowfall days in January - Mammoth Lakes, CA
  • Average snowfall days in January: 9.1 days

The month with the highest number of snowfall days is March (11.3 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in January /
Average sunshine in January
Mammoth Lakes, CA

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

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in January: 6h and 2min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 18min).

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Average sunshine days in January
Mammoth Lakes, CA

Average sunshine days in January - Mammoth Lakes, CA
  • Average sunshine days in January: 21.7 days

The month with the most sunshine days is October (27.3 days).
The month with the least sunshine days is March (18.2 days).

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Average UV index in January
Mammoth Lakes, CA

Average UV index in January - Mammoth Lakes, CA
  • Average UV index in January: 2

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

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Average cloud cover in January
Mammoth Lakes, CA

Average cloud cover in January - Mammoth Lakes, CA
  • Average cloud cover in January: 29

The month with the most cloud cover is March (Cloud cover 30).
The month with the least cloud cover is August (Cloud cover 7).

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Average visibility in January
Mammoth Lakes, CA

Average visibility in January - Mammoth Lakes, 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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Mammoth Lakes, California, USA

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