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
Arrival of December comes with a reduction in the average high-temperature, falling from an icy 40.5°F (4.7°C) in November to a subzero cold 26.2°F (-3.2°C). Fallon experiences an average temperature drop to a still freezing cold 14.2°F (-9.9°C) during December nights.Humidity
In Fallon, the average relative humidity in December is 82%.Rainfall
In December, the rain falls for 4.1 days. Throughout December, 0.59" (15mm) of precipitation is accumulated. Throughout the year, in Fallon, there are 102.6 rainfall days, and 13.35" (339mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Fallon, in December, snow falls for 11.5 days, with typically accumulated 2.95" (75mm) of snow. In Fallon, Montana, during the entire year, snow falls for 58.7 days and aggregates up to 17.28" (439mm) of snow.Daylight
The month with the shortest days in Fallon is December, with an average of 8h and 36min of daylight.On the first day of the month, sunrise is at 7:25 am and sunset at 4:13 pm. On the last day of December, in Fallon, sunrise is at 7:45 am and sunset at 4:22 pm MST.
Sunshine
The months with the least sunshine in Fallon, Montana, are February and December, with an average of 4.9h of sunshine.UV index
November and December, with an average maximum UV index of 1, are months with the lowest UV index in Fallon. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: The UV index of 1 during December translates into the following guidance:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Enhance your sun protection with tightly woven, yet airy clothing. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Frequently asked questions
How cold is it in Fallon in December?
What is the average humidity in December in Fallon?
How many days does it rain in December in Fallon?
How much does it snow in Fallon in December?
What is the month with the shortest days in Fallon?
What is the average length of the day in December in Fallon?
When are sunrise and sunset in December in Fallon?
What is the month with the least sunshine in Fallon?
How many hours of sunshine does Fallon have in December?
What are the months with the lowest UV index in Fallon?
How high is the UV index in December in Fallon?
Average temperature in December
Fallon, MT
- Average high temperature in December: 26.2°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (25.5°F).
- Average low temperature in December: 14.2°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).
Average pressure in December
Fallon, MT
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in December
Fallon, MT
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is August (9.3mph).
Average humidity in December
Fallon, MT
- Average humidity in December: 82%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (43%).
Average rainfall in December
Fallon, MT
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in December
Fallon, MT
- Average rainfall days in December: 4.1 days
The month with the highest number of rainy days is May (13.7 days).
The month with the least rainy days is February (4 days).
Average snowfall in December
Fallon, MT
- Average snowfall in December: 2.95"
The month with the highest snowfall is February (3.62").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Fallon, MT
- Average snowfall days in December: 11.5 days
The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Fallon, 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: 4h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).
Average sunshine days in December
Fallon, MT
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is September (19.8 days).
The month with the least sunshine days is June (13.1 days).
Average UV index in December
Fallon, MT
- Average UV index in December: 1
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are November and December (UV index 1).
Average cloud cover in December
Fallon, MT
- Average cloud cover in December: 48
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 17).
Average visibility in December
Fallon, MT
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Fallon, Montana, USA
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