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 month is December, with an average high-temperature of 59°F (15°C) and an average low-temperature of 44.1°F (6.7°C).Humidity
The average relative humidity in December in Jolon is 66%.Rainfall
In Jolon, in December, during 7.8 rainfall days, 1.18" (30mm) of precipitation is typically accumulated. In Jolon, California, during the entire year, the rain falls for 52.2 days and collects up to 7.13" (181mm) of precipitation.Daylight
The month with the shortest days in Jolon is December, with an average of 9h and 48min of daylight.On the first day of the month, sunrise is at 6:57 am and sunset at 4:50 pm. On the last day of December, sunrise is at 7:15 am and sunset at 5:01 pm PST.
Sunshine
February and December, with an average of 6.3h of sunshine, are months with the least sunshine in Jolon.UV index
February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Jolon. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: In December, an average UV index of 3 transforms into the following instructions:
Take precautions - Protection against sunburn is recommended. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Jolon?
What is the temperature in December in Jolon?
What is the average humidity in December in Jolon?
How many days does it rain in December in Jolon?
What is the month with the shortest days in Jolon?
How many hours of daylight does Jolon have in December?
When is the sunrise / sunset in December in Jolon?
What are the months with the least sunshine in Jolon?
How long on average sun shines in December in Jolon?
What are the months with the lowest UV index in Jolon?
How high is the UV index in December in Jolon?
Average temperature in December
Jolon, CA
- Average high temperature in December: 59°F
The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is December (59°F).
- Average low temperature in December: 44.1°F
The month with the highest average low temperature is August (60.3°F).
The coldest month (with the lowest average low temperature) is February (43.9°F).
Average pressure in December
Jolon, CA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.91"Hg).
Average wind speed in December
Jolon, CA
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is May (6.5mph).
The calmest months (with the lowest average wind speed) are August and September (4.8mph).
Average humidity in December
Jolon, CA
- Average humidity in December: 66%
The months with the highest relative humidity are February and March (68%).
The month with the lowest relative humidity is September (51%).
Average rainfall in December
Jolon, CA
- Average rainfall in December: 1.18"
The wettest month (with the highest rainfall) is January (1.42").
The driest months (with the least rainfall) are June, July and August (0.04").
Average rainfall days in December
Jolon, CA
- Average rainfall days in December: 7.8 days
The month with the highest number of rainy days is March (10.3 days).
The month with the least rainy days is August (0.6 days).
Average daylight in December /
Average sunshine in December
Jolon, CA
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 6h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 18min).
Average sunshine days in December
Jolon, CA
- Average sunshine days in December: 22.3 days
The month with the most sunshine days is August (29.8 days).
The month with the least sunshine days is February (19.9 days).
Average UV index in December
Jolon, 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 February, November and December (UV index 3).
Average cloud cover in December
Jolon, CA
- Average cloud cover in December: 28
The months with the most cloud cover are February and March (Cloud cover 29).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in December
Jolon, 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).
Jolon, California, USA
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