December weather forecast and climate
Glennville, CA

Weather in December

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

Temperature

With an average high-temperature of 49.3°F (9.6°C) and an average low-temperature of 32.4°F (0.2°C), December is the coldest month.

Humidity

In Glennville, the average relative humidity is 59%.

Rainfall

In December, in Glennville, the rain falls for 7.2 days. Throughout December, 1.89" (48mm) of precipitation is accumulated. In Glennville, during the entire year, the rain falls for 65.1 days and collects up to 12.28" (312mm) of precipitation.

Snowfall

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

Daylight

With an average of 9.8h of daylight, December has the shortest days of the year.

Sunshine

The average sunshine in December is 6.5h.

UV index

Months with the lowest UV index in Glennville are November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from the exposure to the Sun's UV radiation for the average person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Glennville?

December is the coldest month in Glennville, with an average high-temperature of 49.3°F (9.6°C) and an average low-temperature of 32.4°F (0.2°C).

What is the temperature in December in Glennville?

In December, in Glennville, the average high-temperature is 49.3°F (9.6°C), and the average low-temperature is 32.4°F (0.2°C).

What is the average humidity in December in Glennville?

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

How many days does it rain in December in Glennville?

In Glennville, in December, during 7.2 rainfall days, 1.89" (48mm) of precipitation is typically accumulated.

How much does it snow in Glennville in December?

In Glennville, in December, during 1.8 snowfall days, 0.83" (21mm) of snow is typically accumulated.

What is the month with the shortest days in Glennville?

The month with the shortest days in Glennville is December, with an average of 9.8h of daylight.

How many hours of daylight does Glennville have in December?

In Glennville, California, the average length of the day in December is 9.8h.

How many hours of sunshine does Glennville have in December?

In Glennville, California, the average sunshine in December is 6.5h.

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

Months with the lowest UV index in Glennville are November and December, with an average maximum UV index of 2.

How high is the UV index in December in Glennville?

In December, the average daily maximum UV index in Glennville is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV rays.

Average temperature in December
Glennville, CA

Average temperature in December - Glennville, 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
Glennville, CA

Average pressure in December - Glennville, CA
  • Average pressure in December: 30.1"

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

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Average wind speed in December
Glennville, CA

Average wind speed in December - Glennville, 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
Glennville, CA

Average humidity in December - Glennville, 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
Glennville, CA

Average rainfall in December - Glennville, 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
Glennville, CA

Average rainfall days in December - Glennville, 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
Glennville, CA

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

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

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Average snowfall days in December
Glennville, CA

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

The month with the highest number of snowfall days is February (2.7 days).
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
Glennville, CA

Average daylight in December / Average sunshine in December - Glennville, CA
  • Average daylight in December: 9.8h

The month with the longest days is June (Average daylight: 14.6h).
The month with the shortest days is December (Average daylight: 9.8h).

  • Average sunshine in December: 6.5h

Months with the most sunshine are June and July (Average sunshine: 12h).
Months with the least sunshine are January and February (Average sunshine: 6.4).

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Average sunshine days in December
Glennville, CA

Average sunshine days in December - Glennville, 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
Glennville, CA

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

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

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Average cloud cover in December
Glennville, CA

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

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

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Average visibility in December
Glennville, CA

Average visibility in December - Glennville, CA
  • Average visibility in December: 6mi

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

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