December weather forecast
Fall River Mills, CA

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Weather in December

The first month of the winter, December, is still a chilly month in Fall River Mills, California, with an average temperature ranging between min 27.9°F (-2.3°C) and max 43.3°F (6.3°C).

Temperature

Temperature records mark December as the coldest month, with highs averaging 43.3°F (6.3°C) and lows at 27.9°F (-2.3°C).

Humidity

The average relative humidity in December is 76%.

Rainfall

In Fall River Mills, California, during December, the rain falls for 12.5 days and regularly aggregates up to 4.21" (107mm) of precipitation. Throughout the year, in Fall River Mills, California, there are 105 rainfall days, and 24.69" (627mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Fall River Mills. In Fall River Mills, in December, snow falls for 7.5 days, with typically accumulated 8.11" (206mm) of snow. Throughout the year, in Fall River Mills, there are 36.7 snowfall days, and 43.62" (1108mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Fall River Mills, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:12 am and sunset at 4:38 pm. On the last day of December, sunrise is at 7:30 am and sunset at 4:47 pm PST.

Sunshine

December has the least sunshine of the year, with an average of 5.7h of sunshine.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: In December, an average UV index of 2 transforms into the following instructions:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Experience reduced UV exposure by about half when donning a wide-brim hat. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
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Frequently asked questions

What time of the year is the coldest in Fall River Mills?

December, with an average high of 43.3°F (6.3°C) and a low of 27.9°F (-2.3°C), signifies the coldest month of the year in Fall River Mills, California.

How cold is it in Fall River Mills in December?

The high-temperature in Fall River Mills during December is 43.3°F (6.3°C) and the low-temperature is 27.9°F (-2.3°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in August is evaluated at 86°F (30°C).

What is the average humidity in December in Fall River Mills?

In Fall River Mills, California, the average relative humidity in December is 76%.

How many days does it rain in December in Fall River Mills?

In Fall River Mills, California, in December, during 12.5 rainfall days, 4.21" (107mm) of precipitation is typically accumulated.

How much does it snow in Fall River Mills in December?

In Fall River Mills, California, in December, snow falls for 7.5 days, with typically accumulated 8.11" (206mm) of snow.

What is the month with the shortest days in Fall River Mills?

December has the shortest days of the year in Fall River Mills, with an average of 9h and 18min of daylight.

What is the average length of the day in December in Fall River Mills?

In Fall River Mills, California, the average day length in December is 9h and 17min.

When is the sunrise / sunset in December in Fall River Mills?

In December, on the first day of the month, sunrise is at 7:12 am and sunset at 4:38 pm. On the last day of the month, in Fall River Mills, sunrise is at 7:30 am and sunset at 4:47 pm PST.

What is the month with the least sunshine in Fall River Mills?

With an average of 5.7h of sunshine, December has the least sunshine of the year.

How long on average sun shines in December in Fall River Mills?

In December, the average sunshine duration is 5.7h.

When is the lowest UV index in Fall River Mills?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Fall River Mills, California.

What is the UV index intensity in December in Fall River Mills?

In Fall River Mills, California, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health threat from unprotected exposure to 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 December
Fall River Mills, CA

Average temperature in December - Fall River Mills, CA
  • Average high temperature in December: 43.3°F

The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is December (43.3°F).

  • Average low temperature in December: 27.9°F

The month with the highest average low temperature is July (53.1°F).
The coldest month (with the lowest average low temperature) is December (27.9°F).

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Average pressure in December
Fall River Mills, CA

Average pressure in December - Fall River Mills, CA
  • Average pressure in December: 30.16"Hg

The month with the highest atmospheric pressure is January (30.18"Hg).
The months with the lowest atmospheric pressure are June and August (29.92"Hg).

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Average wind speed in December
Fall River Mills, CA

Average wind speed in December - Fall River Mills, CA
  • Average wind speed in December: 5.1mph

The windiest month (with the highest average wind speed) is March (5.8mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

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Average humidity in December
Fall River Mills, CA

Average humidity in December - Fall River Mills, CA
  • Average humidity in December: 76%

The months with the highest relative humidity are January and March (79%).
The months with the lowest relative humidity are July and August (40%).

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Average rainfall in December
Fall River Mills, CA

Average rainfall in December - Fall River Mills, CA
  • Average rainfall in December: 4.21"

The wettest month (with the highest rainfall) is March (4.45").
The driest month (with the least rainfall) is July (0.16").

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Average rainfall days in December
Fall River Mills, CA

Average rainfall days in December - Fall River Mills, CA
  • Average rainfall days in December: 12.5 days

The month with the highest number of rainy days is April (14.5 days).
The month with the least rainy days is August (2.3 days).

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Average snowfall in December
Fall River Mills, CA

Average snowfall in December - Fall River Mills, CA
  • Average snowfall in December: 8.11"

The month with the highest snowfall is March (10.43").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Fall River Mills, CA

Average snowfall days in December - Fall River Mills, CA
  • Average snowfall days in December: 7.5 days

The month with the highest number of snowfall days is March (8 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in December /
Average sunshine in December
Fall River Mills, CA

Average daylight in December / Average sunshine in December - Fall River Mills, CA
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 5h and 4min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days in December
Fall River Mills, CA

Average sunshine days in December - Fall River Mills, CA
  • Average sunshine days in December: 14.7 days

The month with the most sunshine days is August (26 days).
The month with the least sunshine days is March (11.3 days).

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Average UV index in December
Fall River Mills, CA

Average UV index in December - Fall River Mills, CA
  • Average UV index in December: 2

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

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Average cloud cover in December
Fall River Mills, CA

Average cloud cover in December - Fall River Mills, CA
  • Average cloud cover in December: 38

The month with the most cloud cover is March (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 6).

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Average visibility in December
Fall River Mills, CA

Average visibility in December - Fall River Mills, CA
  • Average visibility in December: 5mi

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

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Fall River Mills, California, USA

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