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
During the coldest month, December, temperatures average a high of 26.1°F (-3.3°C) and a low of 12.2°F (-11°C).Humidity
The average relative humidity in December in Greenough is 89%.Rainfall
December is the month with the least rainfall. Rain falls for 3.5 days and accumulates 0.08" (2mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. In December, it is snowing for 5 days. Throughout December, 0.71" (18mm) of snow is accumulated. In Greenough, during the entire year, snow falls for 31.4 days and aggregates up to 7.64" (194mm) of snow.Daylight
With an average of 8h and 36min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:59 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 8:19 am and sunset at 4:55 pm MST.
Sunshine
In Greenough, the average sunshine in December is 5.3h.UV index
The months with the lowest UV index in Greenough, Montana, are January 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 unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 1 suggests this advice:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Frequently asked questions
What time of the year is the coldest in Greenough?
How cold is December in Greenough?
What is the average humidity in December in Greenough?
What is the driest month in Greenough?
How much does it rain in Greenough in December?
How many days does it snow in December in Greenough?
What is the month with the shortest days in Greenough?
What is the average length of the day in December in Greenough?
What time are sunrise and sunset in December in Greenough?
How many hours of sunshine does Greenough have in December?
What is the month with the lowest UV index in Greenough?
What is the UV index reading in December in Greenough?
Average temperature in December
Greenough, MT
- Average high temperature in December: 26.1°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is December (26.1°F).
- Average low temperature in December: 12.2°F
The months with the highest average low temperature are July and August (45.5°F).
The coldest month (with the lowest average low temperature) is December (12.2°F).
Average pressure in December
Greenough, 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 (29.91"Hg).
Average wind speed in December
Greenough, MT
- Average wind speed in December: 4.8mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
Greenough, MT
- Average humidity in December: 89%
The month with the highest relative humidity is January (91%).
The months with the lowest relative humidity are July and August (51%).
Average rainfall in December
Greenough, MT
- Average rainfall in December: 0.08"
The wettest month (with the highest rainfall) is June (0.43").
The driest month (with the least rainfall) is December (0.08").
Average rainfall days in December
Greenough, MT
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is April (6.8 days).
The month with the least rainy days is January (2.3 days).
Average snowfall in December
Greenough, MT
- Average snowfall in December: 0.71"
The month with the highest snowfall is February (1.57").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Greenough, MT
- Average snowfall days in December: 5 days
The month with the highest number of snowfall days is February (5.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Greenough, 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: 5h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in December
Greenough, MT
- Average sunshine days in December: 26.7 days
The month with the most sunshine days is July (27 days).
The month with the least sunshine days is April (21.9 days).
Average UV index in December
Greenough, 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 and December (UV index 1).
Average cloud cover in December
Greenough, MT
- Average cloud cover in December: 48
The months with the most cloud cover are January and February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 12).
Average visibility in December
Greenough, MT
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
Greenough, Montana, USA
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