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
Jackson's temperature records reveal December as the coldest month, marked by average highs of 52.9°F (11.6°C) and lows of 37.9°F (3.3°C).Humidity
In December, the average relative humidity in Jackson, California, is 68%.Rainfall
In Jackson, during December, the rain falls for 11 days and regularly aggregates up to 4.02" (102mm) of precipitation. Throughout the year, in Jackson, there are 81.8 rainfall days, and 23.39" (594mm) of precipitation is accumulated.Snowfall
February, March, November and December are months with snowfall. December is the last month it regularly snows in Jackson, California. During 0.3 snowfall days, in December, Jackson aggregates 0.63" (16mm) of snow. Throughout the year, in Jackson, there are 2.8 snowfall days, and 4.65" (118mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:01 am and sunset at 4:42 pm. On the last day of December, in Jackson, sunrise is at 7:19 am and sunset at 4:52 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 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 reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily maximum UV index of 3 in December interprets into the following advice:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Opt for tightly woven and loose clothing to enhance protection from the Sun. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Frequently asked questions
What is the coldest month in Jackson?
What are December temperatures in Jackson?
What is the average humidity in December in Jackson?
How many days does it rain in December in Jackson?
What is the last month it snows in Jackson?
What is the month with the shortest days in Jackson?
What is the average length of the day in December in Jackson?
What time are sunrise and sunset in December in Jackson?
What is the month with the least sunshine in Jackson?
How long on average sun shines in December in Jackson?
When is the lowest UV index in Jackson?
How high is the UV index in December in Jackson?
Average temperature in December
Jackson, CA
- Average high temperature in December: 52.9°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is December (52.9°F).
- Average low temperature in December: 37.9°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is December (37.9°F).
Average pressure in December
Jackson, 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).
Average wind speed in December
Jackson, CA
- Average wind speed in December: 4.8mph
The windiest month (with the highest average wind speed) is February (5.7mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in December
Jackson, CA
- Average humidity in December: 68%
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is July (40%).
Average rainfall in December
Jackson, CA
- Average rainfall in December: 4.02"
The wettest month (with the highest rainfall) is March (4.69").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Jackson, CA
- Average rainfall days in December: 11 days
The month with the highest number of rainy days is March (14.6 days).
The month with the least rainy days is August (1.5 days).
Average snowfall in December
Jackson, CA
- Average snowfall in December: 0.63"
The month with the highest snowfall is February (2.01").
The months with the least snowfall are January, April, May, June, July, August, September and October (0").
Average snowfall days in December
Jackson, CA
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Jackson, 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: 6h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in December
Jackson, CA
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is March (15.1 days).
Average UV index in December
Jackson, 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
Jackson, CA
- Average cloud cover in December: 33
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in December
Jackson, 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).
Jackson, California, USA
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