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
In Jamul, December is the month with the lowest recorded average temperatures, measuring a high of 63°F (17.2°C) and a low of 47.3°F (8.5°C).Humidity
In Jamul, the average relative humidity in December is 58%.Rainfall
In December, the rain falls for 6.2 days. Throughout December, 1.34" (34mm) of precipitation is accumulated. In Jamul, during the entire year, the rain falls for 60.6 days and collects up to 8.66" (220mm) of precipitation.Daylight
With an average of 10h and 0min of daylight, December has the shortest days of the year.On the first day of December in Jamul, sunrise is at 6:32 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 4:52 pm PST.
Sunshine
With an average of 6.7h of sunshine, December has the least sunshine of the year in Jamul.UV index
With an average maximum UV index of 3, December is the month with the lowest UV index in Jamul. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: In December, the maximum UV index of 3 suggests these recommendations:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Minimize direct exposure to the Sun during midday when its radiation is at its peak. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Jamul?
What are December temperatures in Jamul?
What is the average humidity in December in Jamul?
How many days does it rain in December in Jamul?
What is the month with the shortest days in Jamul?
How many hours of daylight does Jamul have in December?
What time are sunrise and sunset in December in Jamul?
What is the month with the least sunshine in Jamul?
How many hours of sunshine does Jamul have in December?
When is the lowest UV index in Jamul?
How high is the UV index in December in Jamul?
Average temperature in December
Jamul, CA
- Average high temperature in December: 63°F
The warmest month (with the highest average high temperature) is August (84.2°F).
The month with the lowest average high temperature is December (63°F).
- Average low temperature in December: 47.3°F
The month with the highest average low temperature is August (66.2°F).
The coldest months (with the lowest average low temperature) are February and December (47.3°F).
Average pressure in December
Jamul, CA
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are June and September (29.87"Hg).
Average wind speed in December
Jamul, CA
- Average wind speed in December: 5mph
The windiest months (with the highest average wind speed) are April and May (5.5mph).
The calmest months (with the lowest average wind speed) are September and October (4.3mph).
Average humidity in December
Jamul, CA
- Average humidity in December: 58%
The month with the highest relative humidity is May (65%).
The month with the lowest relative humidity is November (52%).
Average rainfall in December
Jamul, CA
- Average rainfall in December: 1.34"
The wettest month (with the highest rainfall) is February (1.81").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in December
Jamul, CA
- Average rainfall days in December: 6.2 days
The month with the highest number of rainy days is March (7.7 days).
The month with the least rainy days is June (1.3 days).
Average daylight in December /
Average sunshine in December
Jamul, CA
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 6h and 4min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in December
Jamul, CA
- Average sunshine days in December: 23.4 days
The month with the most sunshine days is June (27.8 days).
The month with the least sunshine days is July (20.3 days).
Average UV index in December
Jamul, CA
- Average UV index in December: 3
The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in December
Jamul, CA
- Average cloud cover in December: 23
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in December
Jamul, 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).
Jamul, California, USA
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