December weather forecast
Keyesville, CA

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Weather in December

The first month of the winter, December, is also a frosty month in Keyesville, California, with an average temperature varying between 49.3°F (9.6°C) and 32.4°F (0.2°C).

Temperature

Temperature readings reach their annual highs in December, averaging 49.3°F (9.6°C) and a minimum average of 32.4°F (0.2°C).

Humidity

In December, the average relative humidity in Keyesville is 59%.

Rainfall

In Keyesville, in December, it is raining for 7.2 days, with typically 1.89" (48mm) of accumulated precipitation. Throughout the year, in Keyesville, there are 65.1 rainfall days, and 12.28" (312mm) of precipitation is accumulated.

Snowfall

January through May, November and December are months with snowfall in Keyesville. In Keyesville, in December, during 1.8 snowfall days, 0.83" (21mm) of snow is typically accumulated. Throughout the year, in Keyesville, California, there are 9.3 snowfall days, and 9.65" (245mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 48min of daylight.
On the first day of the month, sunrise is at 6:45 am and sunset at 4:40 pm. On the last day of December, in Keyesville, sunrise is at 7:03 am and sunset at 4:51 pm PST.

Sunshine

The average sunshine in December is 6.5h.

UV index

The months with the lowest UV index are November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: During December, 2 as the daily maximum UV index converts into the following advice:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
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Frequently asked questions

What part of the year is the coldest in Keyesville?

Keyesville experiences its lowest temperatures in December, with an average peak of 49.3°F (9.6°C) and a low of 32.4°F (0.2°C).

What is the average December temperature in Keyesville?

December temperatures in Keyesville vary between a high-temperature of 49.3°F (9.6°C) and a low-temperature of 32.4°F (0.2°C).

What is the average humidity in December in Keyesville?

In December, the average relative humidity in Keyesville is 59%.

How many days does it rain in December in Keyesville?

In Keyesville, California, in December, it is raining for 7.2 days, with typically 1.89" (48mm) of accumulated precipitation.

How many days does it snow in December in Keyesville?

In December, in Keyesville, California, it is snowing for 1.8 days. Throughout December, 0.83" (21mm) of snow is accumulated.

What is the month with the shortest days in Keyesville?

With an average of 9h and 48min of daylight, December has the shortest days of the year.

How many hours of daylight does Keyesville have in December?

In Keyesville, California, the average day length in December is 9h and 47min.

When is the sunrise / sunset in December in Keyesville?

On the first day of December in Keyesville, California, sunrise is at 6:45 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 4:51 pm PST.

How many hours of sunshine does Keyesville have in December?

In Keyesville, the average sunshine duration in December is 6.5h.

What is the month with the lowest UV index in Keyesville?

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

How high is the UV index in December in Keyesville?

The average daily maximum UV index in December in Keyesville is 2. A UV Index of 2, and less, symbolizes a low health threat 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
Keyesville, CA

Average temperature in December - Keyesville, CA
  • Average high temperature in December: 49.3°F

The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is December (49.3°F).

  • Average low temperature in December: 32.4°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is December (32.4°F).

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Average pressure in December
Keyesville, CA

Average pressure in December - Keyesville, CA
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in December
Keyesville, CA

Average wind speed in December - Keyesville, CA
  • Average wind speed in December: 5.7mph

The windiest month (with the highest average wind speed) is May (7.4mph).
The calmest month (with the lowest average wind speed) is September (5.4mph).

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Average humidity in December
Keyesville, CA

Average humidity in December - Keyesville, CA
  • Average humidity in December: 59%

The month with the highest relative humidity is February (61%).
The month with the lowest relative humidity is August (31%).

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Average rainfall in December
Keyesville, CA

Average rainfall in December - Keyesville, CA
  • Average rainfall in December: 1.89"

The wettest month (with the highest rainfall) is January (2.24").
The driest month (with the least rainfall) is June (0.2").

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Average rainfall days in December
Keyesville, CA

Average rainfall days in December - Keyesville, CA
  • Average rainfall days in December: 7.2 days

The month with the highest number of rainy days is March (10.1 days).
The month with the least rainy days is June (1.5 days).

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Average snowfall in December
Keyesville, CA

Average snowfall in December - Keyesville, CA
  • Average snowfall in December: 0.83"

The month with the highest snowfall is February (3.98").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in December
Keyesville, CA

Average snowfall days in December - Keyesville, CA
  • Average snowfall days in December: 1.8 days

The month with the highest number of snowfall days is February (2.7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Keyesville, CA
  • Average daylight in December: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in December: 6h and 3min

The months with the most sunshine are June and July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and February (Average sunshine: 6h and 24min).

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Average sunshine days in December
Keyesville, CA

Average sunshine days in December - Keyesville, CA
  • Average sunshine days in December: 22.6 days

The month with the most sunshine days is June (27.4 days).
The month with the least sunshine days is February (19.2 days).

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Average UV index in December
Keyesville, CA

Average UV index in December - Keyesville, 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 November and December (UV index 2).

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Average cloud cover in December
Keyesville, CA

Average cloud cover in December - Keyesville, CA
  • Average cloud cover in December: 27

The month with the most cloud cover is March (Cloud cover 31).
The months with the least cloud cover are August and September (Cloud cover 6).

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Average visibility in December
Keyesville, CA

Average visibility in December - Keyesville, 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).

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Keyesville, California, USA

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