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
December is the coldest month of the year, registering average temperatures as high as 66°F (18.9°C) and as low as 50.5°F (10.3°C).Humidity
With an average relative humidity of 38%, December is the most humid month in Winterhaven.Rainfall
In Winterhaven, in December, during 2.7 rainfall days, 0.24" (6mm) of precipitation is typically accumulated. In Winterhaven, during the entire year, the rain falls for 31.6 days and collects up to 2.8" (71mm) 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 the month, sunrise is at 6:23 am and sunset at 4:32 pm. On the last day of December, sunrise is at 6:40 am and sunset at 4:43 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 7.2h of sunshine.UV index
November and December, with an average maximum UV index of 4, are months with the lowest UV index in Winterhaven. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: A typical high UV index of 4 in December suggests the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest?
What is the average December temperature?
What is the most humid month?
What is the average humidity in December?
How much does it rain in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Winterhaven have in December?
What is the month with the lowest UV index?
What is the UV index intensity in December in Winterhaven?
Average temperature in December
Winterhaven, CA
- Average high temperature in December: 66°F
The warmest month (with the highest average high temperature) is July (105.3°F).
The month with the lowest average high temperature is December (66°F).
- Average low temperature in December: 50.5°F
The month with the highest average low temperature is August (86.4°F).
The coldest month (with the lowest average low temperature) is December (50.5°F).
Average pressure in December
Winterhaven, CA
- Average pressure in December: 30.04"Hg
The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.74"Hg).
Average wind speed in December
Winterhaven, CA
- Average wind speed in December: 7mph
The windiest months (with the highest average wind speed) are April and July (8.5mph).
The calmest month (with the lowest average wind speed) is November (6.6mph).
Average humidity in December
Winterhaven, CA
- Average humidity in December: 38%
The month with the highest relative humidity is December (38%).
The month with the lowest relative humidity is June (22%).
Average rainfall in December
Winterhaven, CA
- Average rainfall in December: 0.24"
The wettest months (with the highest rainfall) are July and September (0.39").
The driest months (with the least rainfall) are May and June (0.04").
Average rainfall days in December
Winterhaven, CA
- Average rainfall days in December: 2.7 days
The month with the highest number of rainy days is July (5.8 days).
The month with the least rainy days is May (0.8 days).
Average daylight in December /
Average sunshine in December
Winterhaven, 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: 7h and 1min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 7h and 12min).
Average sunshine days in December
Winterhaven, CA
- Average sunshine days in December: 27.9 days
The month with the most sunshine days is May (30.2 days).
The month with the least sunshine days is July (22.1 days).
Average UV index in December
Winterhaven, CA
- Average UV index in December: 4
The months with the highest UV index are June, July, August and September (UV index 8).
The months with the lowest UV index are November and December (UV index 4).
Average cloud cover in December
Winterhaven, CA
- Average cloud cover in December: 17
The month with the most cloud cover is December (Cloud cover 17).
The month with the least cloud cover is June (Cloud cover 5).
Average visibility in December
Winterhaven, 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).
Winterhaven, California, USA
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