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
Callahan experiences its lowest temperatures in December, with an average peak of 41°F (5°C) and a low of 27.1°F (-2.7°C).Humidity
The average relative humidity in December is 79%.Rainfall
In December, the rain falls for 10.3 days. Throughout December, 3.66" (93mm) of precipitation is accumulated. In Callahan, during the entire year, the rain falls for 107.9 days and collects up to 24.76" (629mm) of precipitation.Snowfall
Months with snowfall in Callahan are January through May, September through December. In Callahan, in December, snow falls for 9.1 days, with typically accumulated 8.98" (228mm) of snow. In Callahan, during the entire year, snow falls for 47.5 days and aggregates up to 57.4" (1458mm) of snow.Daylight
The month with the shortest days in Callahan is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:18 am and sunset at 4:42 pm. On the last day of December, in Callahan, California, sunrise is at 7:36 am and sunset at 4:52 pm PST.
Sunshine
The month with the least sunshine in Callahan is December, with an average of 5.4h of sunshine.UV index
The months with the lowest UV index in Callahan are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Opt for tightly woven and loose clothing to enhance protection from the Sun. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month in Callahan?
How cold is it in Callahan in December?
What is the average humidity in December in Callahan?
How much does it rain in Callahan in December?
How many days does it snow in December in Callahan?
What is the month with the shortest days in Callahan?
What is the average length of the day in December in Callahan?
What time are sunrise and sunset in December in Callahan?
What is the month with the least sunshine in Callahan?
How long on average sun shines in December in Callahan?
What is the month with the lowest UV index in Callahan?
What is the UV index reading in December in Callahan?
Average temperature in December
Callahan, CA
- Average high temperature in December: 41°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is December (41°F).
- Average low temperature in December: 27.1°F
The month with the highest average low temperature is July (51.1°F).
The coldest month (with the lowest average low temperature) is December (27.1°F).
Average pressure in December
Callahan, CA
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is August (29.94"Hg).
Average wind speed in December
Callahan, CA
- Average wind speed in December: 5mph
The windiest month (with the highest average wind speed) is March (5.8mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in December
Callahan, CA
- Average humidity in December: 79%
The month with the highest relative humidity is March (81%).
The month with the lowest relative humidity is August (45%).
Average rainfall in December
Callahan, CA
- Average rainfall in December: 3.66"
The wettest month (with the highest rainfall) is March (4.17").
The driest months (with the least rainfall) are July and August (0.31").
Average rainfall days in December
Callahan, CA
- Average rainfall days in December: 10.3 days
The month with the highest number of rainy days is March (14.6 days).
The month with the least rainy days is August (3.1 days).
Average snowfall in December
Callahan, CA
- Average snowfall in December: 8.98"
The month with the highest snowfall is March (14.02").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Callahan, CA
- Average snowfall days in December: 9.1 days
The month with the highest number of snowfall days is March (11.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Callahan, CA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 5h and 2min
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 24min).
Average sunshine days in December
Callahan, CA
- Average sunshine days in December: 14.7 days
The month with the most sunshine days is August (24.1 days).
The month with the least sunshine days is March (10.9 days).
Average UV index in December
Callahan, CA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Callahan, CA
- Average cloud cover in December: 43
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in December
Callahan, CA
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Callahan, California, USA
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