December weather forecastSimla, CO
December
Weather in December
December, the first month of the winter in Simla, is also an icy month, with an average temperature varying between 22.3°F (-5.4°C) and 39°F (3.9°C).Temperature
During the coldest month, December, temperatures average a high of 39°F (3.9°C) and a low of 22.3°F (-5.4°C).Humidity
In Simla, the average relative humidity in December is 60%.Rainfall
December is the month with the least rainfall. Rain falls for 2.5 days and accumulates 0.2" (5mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In Simla, during December, snow falls for 3.5 days and regularly aggregates up to 0.75" (19mm) of snow. In Simla, during the entire year, snow falls for 26.7 days and aggregates up to 9.02" (229mm) of snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year in Simla, Colorado.On the first day of December, sunrise is at 6:57 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 4:43 pm MST.
Sunshine
The average sunshine in December in Simla is 6.8h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A typical high UV index of 2 in December suggests the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Simla, CO
- Average high temperature in December: 39°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is December (39°F).
- Average low temperature in December: 22.3°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is December (22.3°F).
Average pressure in December
Simla, CO
- Average pressure in December: 30.09"Hg
The months with the highest atmospheric pressure are January and December (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Simla, CO
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is August (9.3mph).
Average humidity in December
Simla, CO
- Average humidity in December: 60%
The month with the highest relative humidity is February (63%).
The months with the lowest relative humidity are June and September (46%).
Average rainfall in December
Simla, CO
- Average rainfall in December: 0.2"
The wettest month (with the highest rainfall) is May (1.77").
The driest month (with the least rainfall) is December (0.2").
Average rainfall days in December
Simla, CO
- Average rainfall days in December: 2.5 days
The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is November (1.7 days).
Average snowfall in December
Simla, CO
- Average snowfall in December: 0.75"
The month with the highest snowfall is February (1.93").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Simla, CO
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is February (6.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Simla, CO
- Average daylight in December: 9h and 30min
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 30min).
- Average sunshine in December: 6h and 48min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 36min).
Average sunshine days in December
Simla, CO
- Average sunshine days in December: 24.9 days
The month with the most sunshine days is December (24.9 days).
The month with the least sunshine days is July (13.4 days).
Average UV index in December
Simla, 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
Simla, CO
- Average cloud cover in December: 25
The months with the most cloud cover are February and April (Cloud cover 27).
The months with the least cloud cover are June and September (Cloud cover 16).
Average visibility in December
Simla, 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).
