December weather forecast
Groveland, CA

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Weather in December

December, the first month of the winter in Groveland, is also a fresh month, with an average temperature varying between 35.1°F (1.7°C) and 51.4°F (10.8°C).

Temperature

Groveland experiences its lowest average temperatures in December, reaching a peak of 51.4°F (10.8°C) and a minimum of 35.1°F (1.7°C).

Humidity

The average relative humidity in December is 65%.

Rainfall

In Groveland, in December, it is raining for 9.6 days, with typically 4.33" (110mm) of accumulated precipitation. Throughout the year, there are 79.1 rainfall days, and 27.32" (694mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall in Groveland. In December, in Groveland, California, it is snowing for 1.4 days. Throughout December, 1.14" (29mm) of snow is accumulated. Throughout the year, there are 9.6 snowfall days, and 20.67" (525mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 36min of daylight.
On the first day of the month, sunrise is at 6:58 am and sunset at 4:42 pm. On the last day of December, in Groveland, sunrise is at 7:16 am and sunset at 4:52 pm PST.

Sunshine

The month with the least sunshine is December, with an average of 6.1h of sunshine.

UV index

In December, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 3 during December translates into the following directions:
Heed the precautions - Suggestions to avoid sunburn are made. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Updated: Feb 9, 2024 | Published by: Weather U.S. | Resources

Frequently asked questions

What time of the year is the coldest in Groveland?

In Groveland, December records the average lowest temperatures, peaking at 51.4°F (10.8°C) and reaching a low of 35.1°F (1.7°C).

What are the temperatures in Groveland in December?

The high-temperature, in December, in Groveland, records 51.4°F (10.8°C), while the low-temperature is 35.1°F (1.7°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in June is estimated at 82.4°F (28°C).

What is the average humidity in December in Groveland?

In December, the average relative humidity is 65%.

How much does it rain in Groveland in December?

In December, in Groveland, California, the rain falls for 9.6 days. Throughout December, 4.33" (110mm) of precipitation is accumulated.

How much does it snow in Groveland in December?

In December, it is snowing for 1.4 days. Throughout December, 1.14" (29mm) of snow is accumulated.

What is the month with the shortest days in Groveland?

December has the shortest days of the year in Groveland, with an average of 9h and 36min of daylight.

What is the average length of the day in December in Groveland?

The average day length in December is 9h and 35min.

When are sunrise and sunset in December in Groveland?

In December, on the first day of the month, sunrise is at 6:58 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:52 pm PST.

What is the month with the least sunshine in Groveland?

December has the least sunshine of the year, with an average of 6.1h of sunshine.

How long on average sun shines in December in Groveland?

In December, the average sunshine duration in Groveland, California, is 6.1h.

How high is the UV index in December in Groveland?

The average daily maximum UV index in December in Groveland is 3. A UV Index estimate of 3 to 5 represents a medium health risk 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
Groveland, CA

Average temperature in December - Groveland, CA
  • Average high temperature in December: 51.4°F

The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is December (51.4°F).

  • Average low temperature in December: 35.1°F

The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is December (35.1°F).

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Average pressure in December
Groveland, CA

Average pressure in December - Groveland, CA
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in December
Groveland, CA

Average wind speed in December - Groveland, CA
  • Average wind speed in December: 4.8mph

The windiest month (with the highest average wind speed) is February (5.8mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).

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Average humidity in December
Groveland, CA

Average humidity in December - Groveland, CA
  • Average humidity in December: 65%

The month with the highest relative humidity is March (70%).
The months with the lowest relative humidity are July and August (33%).

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Average rainfall in December
Groveland, CA

Average rainfall in December - Groveland, CA
  • Average rainfall in December: 4.33"

The wettest month (with the highest rainfall) is March (5.31").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in December
Groveland, CA

Average rainfall days in December - Groveland, CA
  • Average rainfall days in December: 9.6 days

The month with the highest number of rainy days is March (14 days).
The month with the least rainy days is August (1.2 days).

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Average snowfall in December
Groveland, CA

Average snowfall in December - Groveland, CA
  • Average snowfall in December: 1.14"

The month with the highest snowfall is February (8.58").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Groveland, CA

Average snowfall days in December - Groveland, CA
  • Average snowfall days in December: 1.4 days

The month with the highest number of snowfall days is February (3.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Groveland, CA
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 6h and 1min

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

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Average sunshine days in December
Groveland, CA

Average sunshine days in December - Groveland, CA
  • Average sunshine days in December: 19.8 days

The months with the most sunshine days are July and August (28.8 days).
The month with the least sunshine days is March (15.4 days).

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Average UV index in December
Groveland, CA

Average UV index in December - Groveland, CA
  • Average UV index in December: 3

The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is November (UV index 2).

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Average cloud cover in December
Groveland, CA

Average cloud cover in December - Groveland, CA
  • Average cloud cover in December: 30

The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in December
Groveland, CA

Average visibility in December - Groveland, 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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Groveland, California, USA

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