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
In Happy Haven, December records the lowest average temperatures, peaking at 25.7°F (-3.5°C) and reaching a low of 13.8°F (-10.1°C).Humidity
In Happy Haven, the average relative humidity in December is 91%.Rainfall
In Happy Haven, in December, it is raining for 8.9 days, with typically 1.02" (26mm) of accumulated precipitation. Throughout the year, in Happy Haven, there are 126.4 rainfall days, and 11.22" (285mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. In Happy Haven, in December, snow falls for 19.1 days, with typically accumulated 6.77" (172mm) of snow. Throughout the year, in Happy Haven, there are 97 snowfall days, and 33.86" (860mm) of snow is accumulated.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 8:08 am and sunset at 4:44 pm. On the last day of December, sunrise is at 8:28 am and sunset at 4:52 pm MST.
Sunshine
In December, the average sunshine in Happy Haven is 4h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.Note: The UV index of 1 during December translates into the following guidance:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What part of the year is the coldest in Happy Haven?
How cold is it in Happy Haven in December?
What is the average humidity in December in Happy Haven?
How much does it rain in Happy Haven in December?
How many days does it snow in December in Happy Haven?
What is the month with the shortest days in Happy Haven?
What is the average length of the day in December in Happy Haven?
When are sunrise and sunset in December in Happy Haven?
How many hours of sunshine does Happy Haven have in December?
What are the months with the lowest UV index in Happy Haven?
What is the UV index reading in December in Happy Haven?
Average temperature in December
Happy Haven, MT
- Average high temperature in December: 25.7°F
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is December (25.7°F).
- Average low temperature in December: 13.8°F
The month with the highest average low temperature is August (45.5°F).
The coldest month (with the lowest average low temperature) is February (13.5°F).
Average pressure in December
Happy Haven, MT
- Average pressure in December: 30.15"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Happy Haven, MT
- Average wind speed in December: 3.7mph
The windiest month (with the highest average wind speed) is April (4.6mph).
The calmest months (with the lowest average wind speed) are August and December (3.7mph).
Average humidity in December
Happy Haven, MT
- Average humidity in December: 91%
The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (55%).
Average rainfall in December
Happy Haven, MT
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is June (1.42").
The driest month (with the least rainfall) is August (0.43").
Average rainfall days in December
Happy Haven, MT
- Average rainfall days in December: 8.9 days
The month with the highest number of rainy days is April (15.8 days).
The month with the least rainy days is August (6.3 days).
Average snowfall in December
Happy Haven, MT
- Average snowfall in December: 6.77"
The month with the highest snowfall is January (7.72").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Happy Haven, MT
- Average snowfall days in December: 19.1 days
The month with the highest number of snowfall days is December (19.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Happy Haven, 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: 4h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Happy Haven, MT
- Average sunshine days in December: 11.8 days
The month with the most sunshine days is July (21.5 days).
The month with the least sunshine days is March (7.7 days).
Average UV index in December
Happy Haven, MT
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Happy Haven, MT
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in December
Happy Haven, MT
- Average visibility in December: 4mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).
Happy Haven, Montana, USA
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