Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
January's onset brings an average high-temperature of a still subzero cold 28.8°F (-1.8°C), showing a minute difference from December's 26.4°F (-3.1°C). Mammoth records an average low of 13.6°F (-10.2°C) throughout the nights in January.Humidity
January is the most humid month in Mammoth, with an average relative humidity of 85%.Rainfall
The month with the least rainfall in Mammoth is January, when the rain falls for 11.7 days and typically collects 0.59" (15mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In Mammoth, in January, during 4.5 snowfall days, 0.75" (19mm) of snow is typically accumulated. In Mammoth, Montana, during the entire year, snow falls for 20.8 days and aggregates up to 5.12" (130mm) of snow.Daylight
In Mammoth, Montana, the average length of the day in January is 9h and 10min.On the first day of January in Mammoth, sunrise is at 8:08 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 5:32 pm MST.
Sunshine
In January, the average sunshine in Mammoth is 6.2h.UV index
The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 2 in January translates into these instructions:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Frequently asked questions
How cold is it in Mammoth in January?
What is the most humid month in Mammoth?
What is the average humidity in January in Mammoth?
What is the driest month in Mammoth?
How many days does it rain in January in Mammoth?
How much does it snow in Mammoth in January?
What is the average length of the day in January in Mammoth?
When is the sunrise / sunset in January in Mammoth?
How many hours of sunshine does Mammoth have in January?
What is the month with the lowest UV index in Mammoth?
What is the UV index reading in January in Mammoth?
Average temperature in January
Mammoth, MT
- Average high temperature in January: 28.8°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is December (26.4°F).
- Average low temperature in January: 13.6°F
The month with the highest average low temperature is July (47.7°F).
The coldest month (with the lowest average low temperature) is December (11.3°F).
Average pressure in January
Mammoth, MT
- Average pressure in January: 30.23"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Mammoth, MT
- Average wind speed in January: 6.2mph
The windiest month (with the highest average wind speed) is November (6.3mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in January
Mammoth, MT
- Average humidity in January: 85%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are July and August (46%).
Average rainfall in January
Mammoth, MT
- Average rainfall in January: 0.59"
The wettest month (with the highest rainfall) is May (1.85").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in January
Mammoth, MT
- Average rainfall days in January: 11.7 days
The month with the highest number of rainy days is April (18.6 days).
The month with the least rainy days is August (8.6 days).
Average snowfall in January
Mammoth, MT
- Average snowfall in January: 0.75"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Mammoth, MT
- Average snowfall days in January: 4.5 days
The month with the highest number of snowfall days is February (6.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Mammoth, MT
- Average daylight in January: 9h and 1min
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 January: 6h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in January
Mammoth, MT
- Average sunshine days in January: 14.8 days
The month with the most sunshine days is July (17.8 days).
The month with the least sunshine days is April (7.8 days).
Average UV index in January
Mammoth, MT
- Average UV index in January: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in January
Mammoth, MT
- Average cloud cover in January: 38
The month with the most cloud cover is February (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 14).
Average visibility in January
Mammoth, MT
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Mammoth, Montana, USA
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