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
During the coldest month, December, temperatures average a high of 40.3°F (4.6°C) and a low of 20.7°F (-6.3°C).Humidity
In Castlewood, the average relative humidity in December is 61%.Rainfall
In Castlewood, during December, the rain falls for 4.4 days and regularly aggregates up to 0.51" (13mm) of precipitation. In Castlewood, during the entire year, the rain falls for 94.2 days and collects up to 11.97" (304mm) of precipitation.Snowfall
Months with snowfall in Castlewood are January through May, October through December. In Castlewood, Colorado, in December, snow falls for 7.6 days, with typically accumulated 3.39" (86mm) of snow. In Castlewood, during the entire year, snow falls for 46.5 days and aggregates up to 37.2" (945mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of December in Castlewood, sunrise is at 7:01 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:45 pm MST.
Sunshine
The average sunshine in December in Castlewood is 7h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum daily UV index of 2 during December morphs into the following directions:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Around midday, solar radiation is most harmful; hence, exposure should be limited. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Frequently asked questions
What time of the year is the coldest in Castlewood?
How cold is December in Castlewood?
What is the average humidity in December in Castlewood?
How much does it rain in Castlewood in December?
How much does it snow in Castlewood in December?
What is the month with the shortest days in Castlewood?
What is the average length of the day in December in Castlewood?
When is the sunrise / sunset in December in Castlewood?
How long on average sun shines in December in Castlewood?
When is the lowest UV index in Castlewood?
What is the UV index reading in December in Castlewood?
Average temperature in December
Castlewood, CO
- Average high temperature in December: 40.3°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is December (40.3°F).
- Average low temperature in December: 20.7°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is December (20.7°F).
Average pressure in December
Castlewood, CO
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are April and June (29.91"Hg).
Average wind speed in December
Castlewood, CO
- Average wind speed in December: 6.5mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest months (with the lowest average wind speed) are August and December (6.5mph).
Average humidity in December
Castlewood, CO
- Average humidity in December: 61%
The month with the highest relative humidity is February (65%).
The months with the lowest relative humidity are June, August and September (43%).
Average rainfall in December
Castlewood, CO
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is September (0.47").
Average rainfall days in December
Castlewood, CO
- Average rainfall days in December: 4.4 days
The month with the highest number of rainy days is May (14.2 days).
The month with the least rainy days is November (3.4 days).
Average snowfall in December
Castlewood, CO
- Average snowfall in December: 3.39"
The month with the highest snowfall is April (6.34").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Castlewood, CO
- Average snowfall days in December: 7.6 days
The month with the highest number of snowfall days is February (9.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Castlewood, CO
- 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: 7h and 0min
The months with the most sunshine are June and July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 48min).
Average sunshine days in December
Castlewood, CO
- Average sunshine days in December: 21.5 days
The month with the most sunshine days is November (23.2 days).
The month with the least sunshine days is April (12.7 days).
Average UV index in December
Castlewood, CO
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Castlewood, CO
- Average cloud cover in December: 22
The month with the most cloud cover is April (Cloud cover 26).
The months with the least cloud cover are June and September (Cloud cover 15).
Average visibility in December
Castlewood, CO
- 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).
Castlewood, Colorado, USA
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