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
December, characterized by an average high temperature of 27.1°F (-2.7°C) and a low temperature of 15.1°F (-9.4°C), is generally the coldest month.Humidity
In December, the average relative humidity is 92%.Rainfall
December is the month with the most rainfall in Troy. Rain falls for 9.6 days and accumulates 2.24" (57mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In Troy, Montana, during December, snow falls for 20 days and regularly aggregates up to 11.1" (282mm) of snow. In Troy, during the entire year, snow falls for 91.8 days and aggregates up to 49.33" (1253mm) of snow.Daylight
With an average of 8h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 8:15 am and sunset at 4:50 pm. On the last day of December, in Troy, sunrise is at 8:35 am and sunset at 4:58 pm MST.
Sunshine
The average sunshine in December in Troy is 3.5h.UV index
The months with the lowest UV index in Troy are January, February, November and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 1 during December translates into the following guidance:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
What part of the year is the coldest in Troy?
How cold is December in Troy?
What is the average humidity in December in Troy?
What is the wettest month in Troy?
How much does it rain in Troy in December?
How many days does it snow in December in Troy?
What is the month with the shortest days in Troy?
What is the average length of the day in December in Troy?
When is the sunrise / sunset in December in Troy?
How many hours of sunshine does Troy have in December?
What is the month with the lowest UV index in Troy?
How high is the UV index in December in Troy?
Average temperature in December
Troy, MT
- Average high temperature in December: 27.1°F
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is December (27.1°F).
- Average low temperature in December: 15.1°F
The month with the highest average low temperature is August (47.3°F).
The coldest month (with the lowest average low temperature) is December (15.1°F).
Average pressure in December
Troy, MT
- Average pressure in December: 30.17"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Troy, MT
- Average wind speed in December: 3.5mph
The windiest months (with the highest average wind speed) are April and June (4.5mph).
The calmest month (with the lowest average wind speed) is December (3.5mph).
Average humidity in December
Troy, MT
- Average humidity in December: 92%
The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (53%).
Average rainfall in December
Troy, MT
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is December (2.24").
The driest month (with the least rainfall) is August (0.43").
Average rainfall days in December
Troy, MT
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is April (17.5 days).
The month with the least rainy days is August (5.9 days).
Average snowfall in December
Troy, MT
- Average snowfall in December: 11.1"
The month with the highest snowfall is January (11.34").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Troy, MT
- Average snowfall days in December: 20 days
The month with the highest number of snowfall days is December (20 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Troy, MT
- Average daylight in December: 8h and 2min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in December: 3h and 3min
The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in December
Troy, MT
- Average sunshine days in December: 8.6 days
The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (7.4 days).
Average UV index in December
Troy, MT
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Troy, MT
- Average cloud cover in December: 67
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in December
Troy, MT
- Average visibility in December: 3mi
The months with the highest visibility are May, June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).
Troy, Montana, USA
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