December weather forecast
Foresthill, CA

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Weather in December

December, the first month of the winter in Foresthill, is also a frosty month, with an average temperature ranging between max 49.1°F (9.5°C) and min 34.2°F (1.2°C).

Temperature

December, recording an average high temperature of 49.1°F (9.5°C) and a low temperature of 34.2°F (1.2°C), is Foresthill's coldest month.

Humidity

In December, the average relative humidity is 69%.

Rainfall

In December, in Foresthill, the rain falls for 11 days. Throughout December, 5.59" (142mm) of precipitation is accumulated. In Foresthill, California, during the entire year, the rain falls for 85.5 days and collects up to 35.94" (913mm) of precipitation.

Snowfall

January through May, November and December are months with snowfall. In Foresthill, California, during December, snow falls for 3.9 days and regularly aggregates up to 4.96" (126mm) of snow. Throughout the year, there are 22.8 snowfall days, and 56.06" (1424mm) of snow is accumulated.

Daylight

With an average of 9h and 30min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:03 am and sunset at 4:41 pm. On the last day of December, in Foresthill, sunrise is at 7:22 am and sunset at 4:51 pm PST.

Sunshine

The average sunshine in December is 5.8h.

UV index

February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Foresthill, California. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. 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. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.

Frequently asked questions

What part of the year is the coldest in Foresthill?

In Foresthill, the average lowest temperatures are observed in December, with a high of 49.1°F (9.5°C) and a low of 34.2°F (1.2°C).

What is the average December temperature in Foresthill?

Foresthill in December has an average high-temperature of 49.1°F (9.5°C) and an average low-temperature of 34.2°F (1.2°C). In September, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is computed to be 80.6°F (27°C).

What is the average humidity in December in Foresthill?

In Foresthill, the average relative humidity in December is 69%.

How much does it rain in Foresthill in December?

In Foresthill, California, in December, during 11 rainfall days, 5.59" (142mm) of precipitation is typically accumulated.

How much does it snow in Foresthill in December?

In Foresthill, during December, snow falls for 3.9 days and regularly aggregates up to 4.96" (126mm) of snow.

What is the month with the shortest days in Foresthill?

December has the shortest days of the year, with an average of 9h and 30min of daylight.

How many hours of daylight does Foresthill have in December?

The average day length in December is 9h and 29min.

When are sunrise and sunset in December in Foresthill?

On the first day of December, sunrise is at 7:03 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:51 pm PST.

How long on average sun shines in December in Foresthill?

In December, the average sunshine duration is 5.8h.

What are the months with the lowest UV index in Foresthill?

February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

How high is the UV index in December in Foresthill?

In December, the average daily maximum UV index in Foresthill, California, is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from 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
Foresthill, CA

Average temperature in December - Foresthill, CA
  • Average high temperature in December: 49.1°F

The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is December (49.1°F).

  • Average low temperature in December: 34.2°F

The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).

Average pressure in December
Foresthill, CA

Average pressure in December - Foresthill, CA
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in December
Foresthill, CA

Average wind speed in December - Foresthill, CA
  • Average wind speed in December: 5.3mph

The windiest month (with the highest average wind speed) is February (6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in December
Foresthill, CA

Average humidity in December - Foresthill, CA
  • Average humidity in December: 69%

The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is July (38%).

Average rainfall in December
Foresthill, CA

Average rainfall in December - Foresthill, CA
  • Average rainfall in December: 5.59"

The wettest month (with the highest rainfall) is March (7.01").
The driest month (with the least rainfall) is July (0.04").

Average rainfall days in December
Foresthill, CA

Average rainfall days in December - Foresthill, CA
  • Average rainfall days in December: 11 days

The month with the highest number of rainy days is March (13.9 days).
The month with the least rainy days is July (1.4 days).

Average snowfall in December
Foresthill, CA

Average snowfall in December - Foresthill, CA
  • Average snowfall in December: 4.96"

The month with the highest snowfall is March (17.87").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in December
Foresthill, CA

Average snowfall days in December - Foresthill, CA
  • Average snowfall days in December: 3.9 days

The month with the highest number of snowfall days is March (5.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Foresthill, 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 6min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).

Average sunshine days in December
Foresthill, CA

Average sunshine days in December - Foresthill, CA
  • Average sunshine days in December: 18.5 days

The month with the most sunshine days is July (28.4 days).
The month with the least sunshine days is March (13.5 days).

Average UV index in December
Foresthill, CA

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

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

Average cloud cover in December
Foresthill, CA

Average cloud cover in December - Foresthill, CA
  • Average cloud cover in December: 35

The month with the most cloud cover is March (Cloud cover 43).
The months with the least cloud cover are July and August (Cloud cover 5).

Average visibility in December
Foresthill, CA

Average visibility in December - Foresthill, CA
  • Average visibility in December: 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).

Foresthill, California, USA

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