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 22.3°F (-5.4°C) and an average low-temperature of 7.7°F (-13.5°C).Humidity
The average relative humidity in December is 89%.Rainfall
The month with the least rainfall is December, when the rain falls for 4.7 days and typically collects 0.75" (19mm) of precipitation.Snowfall
January through December are months with snowfall in Norris. In Norris, in December, snow falls for 15.5 days, with typically accumulated 6.3" (160mm) of snow. In Norris, Montana, during the entire year, snow falls for 136.1 days and aggregates up to 86.93" (2208mm) of snow.Daylight
With an average of 8h and 48min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:47 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 8:06 am and sunset at 4:53 pm MST.
Sunshine
In Norris, the average sunshine in December is 4.9h.UV index
The average daily maximum UV index in December in Norris is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 2 translates into these guidelines:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Avoiding the Sun during its peak radiation time around midday is a healthy practice. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Frequently asked questions
What part of the year is the coldest in Norris?
How cold is December in Norris?
What is the average humidity in December in Norris?
What is the driest month in Norris?
How much does it rain in Norris in December?
How much does it snow in Norris in December?
What is the month with the shortest days in Norris?
What is the average length of the day in December in Norris?
When are sunrise and sunset in December in Norris?
How long on average sun shines in December in Norris?
What is the UV index intensity in December in Norris?
Average temperature in December
Norris, MT
- Average high temperature in December: 22.3°F
The warmest month (with the highest average high temperature) is July (74.5°F).
The month with the lowest average high temperature is December (22.3°F).
- Average low temperature in December: 7.7°F
The month with the highest average low temperature is August (46°F).
The coldest month (with the lowest average low temperature) is December (7.7°F).
Average pressure in December
Norris, MT
- Average pressure in December: 30.21"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Norris, MT
- Average wind speed in December: 7mph
The windiest month (with the highest average wind speed) is January (7.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Norris, MT
- Average humidity in December: 89%
The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is August (50%).
Average rainfall in December
Norris, MT
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is May (2.36").
The driest month (with the least rainfall) is December (0.75").
Average rainfall days in December
Norris, MT
- Average rainfall days in December: 4.7 days
The month with the highest number of rainy days is June (16.5 days).
The month with the least rainy days is November (2.9 days).
Average snowfall in December
Norris, MT
- Average snowfall in December: 6.3"
The month with the highest snowfall is April (14.76").
The month with the least snowfall is August (0.08").
Average snowfall days in December
Norris, MT
- Average snowfall days in December: 15.5 days
The month with the highest number of snowfall days is April (19.9 days).
The month with the least snowfall days is August (0.3 days).
Average daylight in December /
Average sunshine in December
Norris, MT
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in December
Norris, MT
- Average sunshine days in December: 16 days
The month with the most sunshine days is January (16.3 days).
The month with the least sunshine days is April (6.9 days).
Average UV index in December
Norris, MT
- Average UV index in December: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover in December
Norris, MT
- Average cloud cover in December: 55
The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in December
Norris, 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, February and December (4mi).
Norris, Montana, USA
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