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
The onset of December introduces a moderate change in Terry's weather, with average high-temperatures falling from November's cold 40.5°F (4.7°C) to a subzero cold 26.2°F (-3.2°C). An average low-temperature of 14.2°F (-9.9°C) marks the nights throughout December.Humidity
The average relative humidity in December in Terry is 82%.Rainfall
In Terry, in December, during 4.1 rainfall days, 0.59" (15mm) of precipitation is typically accumulated. In Terry, during the entire year, the rain falls for 102.6 days and collects up to 13.35" (339mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Terry, during December, snow falls for 11.5 days and regularly aggregates up to 2.95" (75mm) of snow. In Terry, during the entire year, snow falls for 58.7 days and aggregates up to 17.28" (439mm) of snow.Daylight
The month with the shortest days is December, with an average of 8h and 36min of daylight.On the first day of December, sunrise is at 7:26 am and sunset at 4:14 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 4:23 pm MST.
Sunshine
The months with the least sunshine in Terry are February and December, with an average of 4.9h of sunshine.UV index
November and December, with an average maximum UV index of 1, are months with the lowest UV index in Terry. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 1 in December translates into the following instructions:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. To protect against the Sun's most potent rays, avoid direct exposure around midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Frequently asked questions
How cold is it in Terry in December?
What is the average humidity in December in Terry?
How much does it rain in Terry in December?
How many days does it snow in December in Terry?
What is the month with the shortest days in Terry?
What is the average length of the day in December in Terry?
What time are sunrise and sunset in December in Terry?
What is the month with the least sunshine in Terry?
How many hours of sunshine does Terry have in December?
When is the lowest UV index in Terry?
What is the UV index intensity in December in Terry?
Average temperature in December
Terry, MT
- Average high temperature in December: 26.2°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (25.5°F).
- Average low temperature in December: 14.2°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).
Average pressure in December
Terry, 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
Terry, MT
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is August (9.3mph).
Average humidity in December
Terry, MT
- Average humidity in December: 82%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (43%).
Average rainfall in December
Terry, MT
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in December
Terry, MT
- Average rainfall days in December: 4.1 days
The month with the highest number of rainy days is May (13.7 days).
The month with the least rainy days is February (4 days).
Average snowfall in December
Terry, MT
- Average snowfall in December: 2.95"
The month with the highest snowfall is February (3.62").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Terry, MT
- Average snowfall days in December: 11.5 days
The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Terry, MT
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).
Average sunshine days in December
Terry, MT
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is September (19.8 days).
The month with the least sunshine days is June (13.1 days).
Average UV index in December
Terry, MT
- Average UV index in December: 1
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are November and December (UV index 1).
Average cloud cover in December
Terry, MT
- Average cloud cover in December: 48
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 17).
Average visibility in December
Terry, 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).
Terry, Montana, USA
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