Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The coldest temperatures occur during December, when averages reach a peak of 55.8°F (13.2°C) and a low of 40.5°F (4.7°C).Humidity
In Forestville, the average relative humidity in December is 74%.Rainfall
In Forestville, in December, it is raining for 11.6 days, with typically 3.27" (83mm) of accumulated precipitation. Throughout the year, in Forestville, California, there are 80.5 rainfall days, and 17.6" (447mm) of precipitation 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 7:10 am and sunset at 4:51 pm. On the last day of December, sunrise is at 7:28 am and sunset at 5:01 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 5.6h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: During December, 3 as the daily maximum UV index converts into the following advice:
Act with care - The need to guard against sun damage is communicated. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Frequently asked questions
What month is the coldest in Forestville?
What are December temperatures in Forestville?
What is the average humidity in December in Forestville?
How much does it rain in Forestville in December?
What is the month with the shortest days in Forestville?
What is the average length of the day in December in Forestville?
What time are sunrise and sunset in December in Forestville?
What is the month with the least sunshine in Forestville?
How long on average sun shines in December in Forestville?
What are the months with the lowest UV index in Forestville?
What is the UV index intensity in December in Forestville?
Average temperature in December
Forestville, CA
- Average high temperature in December: 55.8°F
The warmest month (with the highest average high temperature) is August (83.5°F).
The month with the lowest average high temperature is December (55.8°F).
- Average low temperature in December: 40.5°F
The month with the highest average low temperature is August (54.3°F).
The coldest month (with the lowest average low temperature) is December (40.5°F).
Average pressure in December
Forestville, CA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in December
Forestville, CA
- Average wind speed in December: 4.8mph
The windiest month (with the highest average wind speed) is May (6.4mph).
The calmest month (with the lowest average wind speed) is November (4.5mph).
Average humidity in December
Forestville, CA
- Average humidity in December: 74%
The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is September (58%).
Average rainfall in December
Forestville, CA
- Average rainfall in December: 3.27"
The wettest month (with the highest rainfall) is February (3.78").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Forestville, CA
- Average rainfall days in December: 11.6 days
The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is July (1 days).
Average daylight in December /
Average sunshine in December
Forestville, CA
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 5h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in December
Forestville, CA
- Average sunshine days in December: 18.5 days
The month with the most sunshine days is July (29.1 days).
The month with the least sunshine days is March (15.3 days).
Average UV index in December
Forestville, CA
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Forestville, CA
- Average cloud cover in December: 38
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in December
Forestville, 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).
Forestville, California, USA
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