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 snowfall in December
- Average snowfall 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 month of December, characterized by an average high of 51.3°F (10.7°C) and a low of 37.2°F (2.9°C), is recognized as the coldest.Humidity
In December, the average relative humidity is 68%.Rainfall
In Penn Valley, California, in December, it is raining for 10.7 days, with typically 5.35" (136mm) of accumulated precipitation. In Penn Valley, during the entire year, the rain falls for 82 days and collects up to 33.11" (841mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In Penn Valley, in December, snow falls for 0.5 days, with typically accumulated 0.71" (18mm) of snow. Throughout the year, in Penn Valley, California, there are 6.8 snowfall days, and 14.41" (366mm) of snow is accumulated.Daylight
The month with the shortest days in Penn Valley is December, with an average of 9h and 30min of daylight.On the first day of December, sunrise is at 7:05 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:52 pm PST.
Sunshine
In December, the average sunshine in Penn Valley, California, is 5.8h.UV index
The average daily maximum UV index in December is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 3 during December translates into these guidelines:
Put precautions into practice - Protective measures against sun-induced damage are advised. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
What part of the year is the coldest in Penn Valley?
What is the average December temperature in Penn Valley?
What is the average humidity in December in Penn Valley?
How many days does it rain in December in Penn Valley?
How much does it snow in Penn Valley in December?
What is the month with the shortest days in Penn Valley?
What is the average length of the day in December in Penn Valley?
When are sunrise and sunset in December in Penn Valley?
How long on average sun shines in December in Penn Valley?
How high is the UV index in December in Penn Valley?
Average temperature in December
Penn Valley, CA
- Average high temperature in December: 51.3°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is December (51.3°F).
- Average low temperature in December: 37.2°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is December (37.2°F).
Average pressure in December
Penn Valley, 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
Penn Valley, 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
Penn Valley, CA
- Average humidity in December: 68%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (37%).
Average rainfall in December
Penn Valley, CA
- Average rainfall in December: 5.35"
The wettest month (with the highest rainfall) is March (6.57").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Penn Valley, CA
- Average rainfall days in December: 10.7 days
The month with the highest number of rainy days is March (15.1 days).
The month with the least rainy days is July (1.1 days).
Average snowfall in December
Penn Valley, CA
- Average snowfall in December: 0.71"
The month with the highest snowfall is February (6.42").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Penn Valley, CA
- Average snowfall days in December: 0.5 days
The month with the highest number of snowfall days is March (2.4 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
Penn Valley, 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 12min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).
Average sunshine days in December
Penn Valley, CA
- Average sunshine days in December: 19.1 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is March (14.8 days).
Average UV index in December
Penn Valley, 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).
Average cloud cover in December
Penn Valley, CA
- Average cloud cover in December: 35
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in December
Penn Valley, 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).
Penn Valley, California, USA
Weather forecast for your location
2. Allow the app to use your location
