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
As Sidney, Montana, transitions into December, a noticeable drop in the average high-temperature is observed, falling from a cold 39.4°F (4.1°C) in November to a freezing cold 24.6°F (-4.1°C). In December, the recorded average low-temperature in Sidney is a frigid cold 12.7°F (-10.7°C).Humidity
The average relative humidity in December in Sidney, Montana, is 84%.Rainfall
In December, in Sidney, the rain falls for 3.5 days. Throughout December, 0.31" (8mm) of precipitation is accumulated. Throughout the year, there are 85.7 rainfall days, and 8.5" (216mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Sidney, in December, snow falls for 11.2 days, with typically accumulated 1.65" (42mm) of snow. Throughout the year, in Sidney, there are 56.1 snowfall days, and 8.94" (227mm) of snow is accumulated.Daylight
With an average of 8h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:25 am and sunset at 4:06 pm. On the last day of December, in Sidney, Montana, sunrise is at 7:45 am and sunset at 4:14 pm MST.
Sunshine
The average sunshine in December is 4.5h.UV index
The average daily maximum UV index in December in Sidney is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 2 in December converts into the following recommendations:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
How cold is it in Sidney in December?
What is the average humidity in December in Sidney?
How many days does it rain in December in Sidney?
How much does it snow in Sidney in December?
What is the month with the shortest days in Sidney?
What is the average length of the day in December in Sidney?
What time are sunrise and sunset in December in Sidney?
How many hours of sunshine does Sidney have in December?
What is the UV index reading in December in Sidney?
Average temperature in December
Sidney, MT
- Average high temperature in December: 24.6°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (23.4°F).
- Average low temperature in December: 12.7°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure in December
Sidney, MT
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in December
Sidney, MT
- Average wind speed in December: 10mph
The windiest months (with the highest average wind speed) are April and October (11.1mph).
The calmest month (with the lowest average wind speed) is February (9.2mph).
Average humidity in December
Sidney, MT
- Average humidity in December: 84%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (45%).
Average rainfall in December
Sidney, MT
- Average rainfall in December: 0.31"
The wettest month (with the highest rainfall) is July (1.34").
The driest month (with the least rainfall) is January (0.24").
Average rainfall days in December
Sidney, MT
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is June (11.4 days).
The months with the least rainy days are January and February (3.2 days).
Average snowfall in December
Sidney, MT
- Average snowfall in December: 1.65"
The month with the highest snowfall is February (1.77").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Sidney, MT
- Average snowfall days in December: 11.2 days
The month with the highest number of snowfall days is February (12 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Sidney, MT
- Average daylight in December: 8h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in December: 4h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in December
Sidney, MT
- Average sunshine days in December: 18.7 days
The month with the most sunshine days is September (20.7 days).
The month with the least sunshine days is April (15.8 days).
Average UV index in December
Sidney, MT
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover in December
Sidney, MT
- Average cloud cover in December: 53
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 18).
Average visibility in December
Sidney, MT
- 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).
Sidney, Montana, USA
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