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 is the coldest month, with an average high-temperature of 20.5°F (-6.4°C) and an average low-temperature of 4.8°F (-15.1°C).Humidity
The average relative humidity in December is 92%.Rainfall
In December, the rain falls for 5.7 days. Throughout December, 1.77" (45mm) of precipitation is accumulated. Throughout the year, there are 123.8 rainfall days, and 24.53" (623mm) of precipitation is accumulated.Snowfall
January through July, September through December are months with snowfall. In Grahams Place, in December, during 25.5 snowfall days, 14.88" (378mm) of snow is typically accumulated. Throughout the year, there are 165.6 snowfall days, and 125.16" (3179mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 7:44 am and sunset at 4:46 pm. On the last day of December, sunrise is at 8:03 am and sunset at 4:55 pm MST.
Sunshine
In December, the average sunshine is 3.7h.UV index
The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 1 transforms into these recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
How cold is December?
What is the average humidity in December in Grahams Place?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days in Grahams Place?
What is the average length of the day in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Grahams Place, MT
- Average high temperature in December: 20.5°F
The warmest month (with the highest average high temperature) is July (73.2°F).
The month with the lowest average high temperature is December (20.5°F).
- Average low temperature in December: 4.8°F
The month with the highest average low temperature is August (43°F).
The coldest month (with the lowest average low temperature) is December (4.8°F).
Average pressure in December
Grahams Place, MT
- Average pressure in December: 30.23"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Grahams Place, MT
- Average wind speed in December: 6.2mph
The windiest months (with the highest average wind speed) are January, February, March, June, November and December (6.2mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Grahams Place, MT
- Average humidity in December: 92%
The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is August (52%).
Average rainfall in December
Grahams Place, MT
- Average rainfall in December: 1.77"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is July (0.91").
Average rainfall days in December
Grahams Place, MT
- Average rainfall days in December: 5.7 days
The month with the highest number of rainy days is May (20.5 days).
The month with the least rainy days is January (4 days).
Average snowfall in December
Grahams Place, MT
- Average snowfall in December: 14.88"
The month with the highest snowfall is February (20.67").
The month with the least snowfall is August (0").
Average snowfall days in December
Grahams Place, MT
- Average snowfall days in December: 25.5 days
The month with the highest number of snowfall days is March (26.4 days).
The month with the least snowfall days is August (0 days).
Average daylight in December /
Average sunshine in December
Grahams Place, MT
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 3h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The months with the least sunshine are January and February (Average sunshine: 3h and 36min).
Average sunshine days in December
Grahams Place, MT
- Average sunshine days in December: 7.3 days
The month with the most sunshine days is September (16.4 days).
The month with the least sunshine days is May (3.8 days).
Average UV index in December
Grahams Place, MT
- Average UV index in December: 1
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).
Average cloud cover in December
Grahams Place, MT
- Average cloud cover in December: 69
The month with the most cloud cover is February (Cloud cover 73).
The months with the least cloud cover are July and August (Cloud cover 17).
Average visibility in December
Grahams Place, MT
- Average visibility in December: 4mi
The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (3mi).
Grahams Place, Montana, USA
Weather forecast for your location
2. Allow the app to use your location