December weather forecast
Truckee, CA

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The iconic Donner Summit Bridge called the Rainbow Bridge or Route 40, in Truckee, California
The iconic Donner Summit Bridge called the Rainbow Bridge or Route 40, in Truckee, California

Weather in December

December amplifies the winter conditions with temperatures at 37°F (2.8°C) and substantial snowfall of 30.08" (764mm) over 14.6 days. Truckee is staged for a beautiful snowy end to the year, setting a festive spirit filled with joy and warmth. The city witnesses the shortest day of the year, followed by a gradual increase in daylight. Residents revel in the snow-covered landscapes that glisten under the winter sun. Despite the freezing conditions and heavy snowfall, the celebrations continue, marking the city's resilience against the biting cold.

Temperature

Truckee's December weather, with an average high temperature of 37°F (2.8°C) and an average low temperature of 22.1°F (-5.5°C), tends to be the coldest of the year.

Humidity

The average relative humidity in December in Truckee is 77%.

Rainfall

In Truckee, in December, it is raining for 6.5 days, with typically 4.13" (105mm) of accumulated precipitation. In Truckee, during the entire year, the rain falls for 60 days and collects up to 24.41" (620mm) of precipitation.

Snowfall

Months with snowfall in Truckee are January through June, September through December. In December, in Truckee, it is snowing for 14.6 days. Throughout December, 30.08" (764mm) of snow is accumulated. Throughout the year, there are 82.8 snowfall days, and 146.89" (3731mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Truckee, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 7:02 am and sunset at 4:37 pm. On the last day of December, in Truckee, sunrise is at 7:20 am and sunset at 4:47 pm PST.

Sunshine

The month with the least sunshine in Truckee is December, with an average of 5.8h of sunshine.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index of 2 during December translates into the following directions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
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Frequently asked questions

What time of the year is the coldest in Truckee?

With average temperatures fluctuating between a high of 37°F (2.8°C) and a low of 22.1°F (-5.5°C), December stands out as the coldest month in Truckee, California.

How cold is it in Truckee in December?

The average high-temperature, in December, in Truckee, is 37°F (2.8°C), while the average low-temperature is 22.1°F (-5.5°C).

What is the average humidity in December in Truckee?

In December, the average relative humidity in Truckee is 77%.

How many days does it rain in December in Truckee?

In Truckee, in December, during 6.5 rainfall days, 4.13" (105mm) of precipitation is typically accumulated.

How many days does it snow in December in Truckee?

In Truckee, California, in December, snow falls for 14.6 days, with typically accumulated 30.08" (764mm) of snow.

What is the month with the shortest days in Truckee?

The month with the shortest days in Truckee is December, with an average of 9h and 30min of daylight.

How many hours of daylight does Truckee have in December?

In December, the average day length in Truckee is 9h and 27min.

When is the sunrise / sunset in December in Truckee?

On the first day of December in Truckee, sunrise is at 7:02 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:47 pm PST.

What is the month with the least sunshine in Truckee?

December has the least sunshine of the year, with an average of 5.8h of sunshine.

How long on average sun shines in December in Truckee?

In Truckee, California, the average sunshine duration in December is 5.8h.

When is the lowest UV index in Truckee?

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

How high is the UV index in December in Truckee?

In Truckee, California, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from unsafe exposure to Sun's UV rays.
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 December
Truckee, CA

Average temperature in December - Truckee, CA
  • Average high temperature in December: 37°F

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is December (37°F).

  • Average low temperature in December: 22.1°F

The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is December (22.1°F).

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Average pressure in December
Truckee, CA

Average pressure in December - Truckee, CA
  • Average pressure in December: 30.15"Hg

The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in December
Truckee, CA

Average wind speed in December - Truckee, CA
  • Average wind speed in December: 5.8mph

The windiest month (with the highest average wind speed) is March (6.6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in December
Truckee, CA

Average humidity in December - Truckee, CA
  • Average humidity in December: 77%

The month with the highest relative humidity is March (80%).
The months with the lowest relative humidity are July and August (39%).

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Average rainfall in December
Truckee, CA

Average rainfall in December - Truckee, CA
  • Average rainfall in December: 4.13"

The wettest month (with the highest rainfall) is February (4.37").
The driest month (with the least rainfall) is August (0.12").

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Average rainfall days in December
Truckee, CA

Average rainfall days in December - Truckee, CA
  • Average rainfall days in December: 6.5 days

The month with the highest number of rainy days is May (8.9 days).
The month with the least rainy days is July (2.4 days).

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Average snowfall in December
Truckee, CA

Average snowfall in December - Truckee, CA
  • Average snowfall in December: 30.08"

The month with the highest snowfall is March (30.35").
The months with the least snowfall are July and August (0").

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Average snowfall days in December
Truckee, CA

Average snowfall days in December - Truckee, CA
  • Average snowfall days in December: 14.6 days

The month with the highest number of snowfall days is March (16.2 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in December /
Average sunshine in December
Truckee, CA

Average daylight in December / Average sunshine in December - Truckee, CA
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 5h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).

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Average sunshine days in December
Truckee, CA

Average sunshine days in December - Truckee, CA
  • Average sunshine days in December: 16.2 days

The month with the most sunshine days is July (27.1 days).
The month with the least sunshine days is March (12.8 days).

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Average UV index in December
Truckee, CA

Average UV index in December - Truckee, CA
  • Average UV index in December: 2

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

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Average cloud cover in December
Truckee, CA

Average cloud cover in December - Truckee, CA
  • Average cloud cover in December: 38

The month with the most cloud cover is March (Cloud cover 40).
The month with the least cloud cover is July (Cloud cover 6).

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Average visibility in December
Truckee, CA

Average visibility in December - Truckee, CA
  • Average visibility in December: 5mi

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

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Truckee, California, USA

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