December weather forecastEnnis, MT
December
Weather in December
December in Ennis heralds the arrival of winter in earnest. Dramatically contrasting with November, it is characterized by cold temperatures and substantial snowfall, with an average accumulation of 6.3" (160mm) over 15.5 days. The festive air, coupled with gleaming white snow, provides a classic holiday season atmosphere. With outdoor activities considerably reduced, Ennis during December is a haven for those who enjoy cozying up indoors, making the most of the holiday ambiance.Temperature
In Ennis, December is the coldest month, with temperatures averaging a high of 22.3°F (-5.4°C) and a low of 7.7°F (-13.5°C).Humidity
In Ennis, the average relative humidity in December is 89%.Rainfall
December is the month with the least rainfall in Ennis. Rain falls for 4.7 days and accumulates 0.75" (19mm) of precipitation.Snowfall
January through December are months with snowfall in Ennis. In December, it is snowing for 15.5 days. Throughout December, 6.3" (160mm) of snow is accumulated. Throughout the year, there are 136.1 snowfall days, and 86.93" (2208mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 48min of daylight.On the first day of December in Ennis, Montana, sunrise is at 7:46 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 8:06 am and sunset at 4:54 pm MST.
Sunshine
The average sunshine in December is 4.9h.UV index
In December, the average daily maximum UV index in Ennis is 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, an average UV index of 2 transforms into the following instructions:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Ennis, 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
Ennis, 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
Ennis, 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
Ennis, 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
Ennis, 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
Ennis, 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
Ennis, 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
Ennis, 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
Ennis, MT
- Average daylight in December: 8h and 48min
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 54min
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
Ennis, 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
Ennis, 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
Ennis, 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
Ennis, 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).
