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
December, on average, is the coldest month, registering a high temperature of 52.7°F (11.5°C) and a low of 42.1°F (5.6°C).Humidity
The average relative humidity in December is 79%.Rainfall
December is the month with the most rainfall. Rain falls for 15.2 days and accumulates 5.31" (135mm) of precipitation.Snowfall
January, March through December are months without snowfall.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:22 am and sunset at 4:49 pm. On the last day of December, sunrise is at 7:40 am and sunset at 4:59 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 5.2h of sunshine.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the maximum UV index of 3 transforms into these recommendations:
Be vigilant - Preventing sunburn is recommended. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
What is the average December temperature in Humboldt Hill?
What is the average humidity in December?
What is the wettest month?
How many days does it rain in December?
When it does not snow?
What is the month with the shortest days?
How many hours of daylight does Humboldt Hill have in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December in Humboldt Hill?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Humboldt Hill, CA
- Average high temperature in December: 52.7°F
The warmest month (with the highest average high temperature) is August (69.6°F).
The month with the lowest average high temperature is December (52.7°F).
- Average low temperature in December: 42.1°F
The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is February (41.9°F).
Average pressure in December
Humboldt Hill, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is August (29.96"Hg).
Average wind speed in December
Humboldt Hill, CA
- Average wind speed in December: 7.9mph
The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
Humboldt Hill, CA
- Average humidity in December: 79%
The month with the highest relative humidity is March (82%).
The month with the lowest relative humidity is October (75%).
Average rainfall in December
Humboldt Hill, CA
- Average rainfall in December: 5.31"
The wettest month (with the highest rainfall) is December (5.31").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in December
Humboldt Hill, CA
- Average rainfall days in December: 15.2 days
The month with the highest number of rainy days is March (17.5 days).
The month with the least rainy days is August (2.1 days).
Average snowfall in December
Humboldt Hill, CA
- Average snowfall in December: 0"
The month with the highest snowfall is February (0.39").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Humboldt Hill, CA
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Humboldt Hill, CA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in December
Humboldt Hill, CA
- Average sunshine days in December: 14.7 days
The month with the most sunshine days is July (28.3 days).
The month with the least sunshine days is March (12.1 days).
Average UV index in December
Humboldt Hill, CA
- Average UV index in December: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 3).
Average cloud cover in December
Humboldt Hill, CA
- Average cloud cover in December: 43
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in December
Humboldt Hill, CA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Humboldt Hill, California, USA
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