December weather forecastKirby, MT
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Kirby, Montana, with an average temperature varying between 16.7°F (-8.5°C) and 31.1°F (-0.5°C).Temperature
Kirby's December weather, with an average high temperature of 31.1°F (-0.5°C) and an average low temperature of 16.7°F (-8.5°C), tends to be the coldest of the year.Humidity
In Kirby, the average relative humidity in December is 75%.Rainfall
The month with the least rainfall is December, when the rain falls for 6.8 days and typically collects 0.67" (17mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In Kirby, in December, snow falls for 11.2 days, with typically accumulated 3.62" (92mm) of snow. In Kirby, Montana, during the entire year, snow falls for 65.3 days and aggregates up to 28.82" (732mm) of snow.Daylight
With an average of 8h and 48min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:27 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 4:35 pm MST.
Sunshine
In Kirby, the average sunshine in December is 6.1h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: A maximum UV index of 2 in December translates into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. To protect against the Sun's most potent rays, avoid direct exposure around midday. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Kirby, MT
- Average high temperature in December: 31.1°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is December (31.1°F).
- Average low temperature in December: 16.7°F
The month with the highest average low temperature is July (61.5°F).
The coldest months (with the lowest average low temperature) are January and February (16.2°F).
Average pressure in December
Kirby, MT
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Kirby, MT
- Average wind speed in December: 6.8mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest months (with the lowest average wind speed) are July and December (6.8mph).
Average humidity in December
Kirby, MT
- Average humidity in December: 75%
The months with the highest relative humidity are January and February (79%).
The month with the lowest relative humidity is August (40%).
Average rainfall in December
Kirby, MT
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is May (2.64").
The driest month (with the least rainfall) is December (0.67").
Average rainfall days in December
Kirby, MT
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in December
Kirby, MT
- Average snowfall in December: 3.62"
The month with the highest snowfall is February (5.2").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Kirby, MT
- Average snowfall days in December: 11.2 days
The month with the highest number of snowfall days is February (14.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Kirby, MT
- Average daylight in December: 8h and 48min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 6h and 6min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).
Average sunshine days in December
Kirby, MT
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is September (18.2 days).
The month with the least sunshine days is May (9.6 days).
Average UV index in December
Kirby, 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, February, March, November and December (UV index 2).
Average cloud cover in December
Kirby, MT
- Average cloud cover in December: 37
The month with the most cloud cover is February (Cloud cover 41).
The months with the least cloud cover are July and August (Cloud cover 14).
Average visibility in December
Kirby, 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).
