December weather forecastHerlong, CA
December
Weather in December
The first month of the winter, December, is also a wintry month in Herlong, California, with an average temperature varying between 36.7°F (2.6°C) and 21.4°F (-5.9°C).Temperature
December stands out as Herlong's coldest month, with temperatures ranging between an average high of 36.7°F (2.6°C) and a low of 21.4°F (-5.9°C).Humidity
In Herlong, the average relative humidity in December is 79%.Rainfall
In December, in Herlong, the rain falls for 5.4 days. Throughout December, 3.23" (82mm) of precipitation is accumulated. In Herlong, during the entire year, the rain falls for 64.7 days and collects up to 20.51" (521mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In Herlong, during December, snow falls for 14.6 days and regularly aggregates up to 24.02" (610mm) of snow. Throughout the year, there are 82.6 snowfall days, and 115.39" (2931mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:04 am and sunset at 4:35 pm. On the last day of December, in Herlong, sunrise is at 7:22 am and sunset at 4:45 pm PST.
Sunshine
In Herlong, California, the average sunshine in December is 5.3h.UV index
The average daily maximum UV index in December in Herlong is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: An average maximum UV index of 2 in December leads to these recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Herlong, CA
- Average high temperature in December: 36.7°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is December (36.7°F).
- Average low temperature in December: 21.4°F
The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is December (21.4°F).
Average pressure in December
Herlong, CA
- Average pressure in December: 30.16"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Herlong, CA
- Average wind speed in December: 5.6mph
The windiest month (with the highest average wind speed) is March (6.6mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Herlong, CA
- Average humidity in December: 79%
The month with the highest relative humidity is January (81%).
The months with the lowest relative humidity are July and August (39%).
Average rainfall in December
Herlong, CA
- Average rainfall in December: 3.23"
The wettest month (with the highest rainfall) is March (3.62").
The driest months (with the least rainfall) are July and August (0.16").
Average rainfall days in December
Herlong, CA
- Average rainfall days in December: 5.4 days
The month with the highest number of rainy days is May (9.9 days).
The month with the least rainy days is July (2.5 days).
Average snowfall in December
Herlong, CA
- Average snowfall in December: 24.02"
The month with the highest snowfall is March (24.61").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Herlong, CA
- Average snowfall days in December: 14.6 days
The month with the highest number of snowfall days is March (15.7 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Herlong, CA
- Average daylight in December: 9h and 24min
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 24min).
- Average sunshine in December: 5h and 18min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in December
Herlong, CA
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is August (26.9 days).
The month with the least sunshine days is March (12.3 days).
Average UV index in December
Herlong, CA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in December
Herlong, CA
- Average cloud cover in December: 44
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility in December
Herlong, CA
- Average visibility in December: 5mi
The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
