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
Challenge witnesses the coldest weather in December, with temperatures averaging a high of 52.5°F (11.4°C) and a low of 38.1°F (3.4°C).Humidity
In Challenge, the average relative humidity in December is 67%.Rainfall
In Challenge, in December, during 11.4 rainfall days, 5.28" (134mm) of precipitation is typically accumulated. Throughout the year, in Challenge, California, there are 88.4 rainfall days, and 30.35" (771mm) of precipitation is accumulated.Snowfall
Months with snowfall are February, November and December. December is the last month it regularly snows in Challenge. During 0.3 snowfall days, in December, Challenge aggregates 0.24" (6mm) of snow. In Challenge, during the entire year, snow falls for 1.1 days and aggregates up to 0.79" (20mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:06 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:51 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 5.7h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 3 during December leads to these instructions:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. The Sun's radiation is especially intense around midday; try to stay in shade during this period. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Frequently asked questions
What are the coldest months in Challenge?
What is the usual temperature for Challenge in December?
What is the average humidity in December in Challenge?
How many days does it rain in December in Challenge?
What is the last month it snows in Challenge?
What is the month with the shortest days in Challenge?
How many hours of daylight does Challenge have in December?
When are sunrise and sunset in December in Challenge?
What is the month with the least sunshine in Challenge?
How long on average sun shines in December in Challenge?
What is the month with the lowest UV index in Challenge?
What is the UV index intensity in December in Challenge?
Average temperature in December
Challenge, CA
- Average high temperature in December: 52.5°F
The warmest month (with the highest average high temperature) is July (92.5°F).
The month with the lowest average high temperature is December (52.5°F).
- Average low temperature in December: 38.1°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is December (38.1°F).
Average pressure in December
Challenge, CA
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Challenge, CA
- Average wind speed in December: 5.5mph
The windiest months (with the highest average wind speed) are February, March and April (6.2mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Challenge, CA
- Average humidity in December: 67%
The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are July and August (34%).
Average rainfall in December
Challenge, CA
- Average rainfall in December: 5.28"
The wettest month (with the highest rainfall) is March (6.02").
The driest month (with the least rainfall) is July (0.04").
Average rainfall days in December
Challenge, CA
- Average rainfall days in December: 11.4 days
The month with the highest number of rainy days is March (15.5 days).
The month with the least rainy days is July (1.4 days).
Average snowfall in December
Challenge, CA
- Average snowfall in December: 0.24"
The month with the highest snowfall is February (0.43").
The months with the least snowfall are January, March, April, May, June, July, August, September and October (0").
Average snowfall days in December
Challenge, CA
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is February (0.6 days).
The months with the least snowfall days are January, April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Challenge, CA
- Average daylight in December: 9h and 2min
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 24min).
- Average sunshine in December: 5h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in December
Challenge, CA
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is July (28.3 days).
The month with the least sunshine days is March (14.5 days).
Average UV index in December
Challenge, CA
- Average UV index in December: 3
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Challenge, CA
- Average cloud cover in December: 36
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
Challenge, 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).
Challenge, California, USA
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