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
The transition into January shows a subtle variation to a still subzero cold 27.1°F (-2.7°C) from December's 25.7°F (-3.5°C) in the average high-temperature. Halfmoon observes an average nighttime low-temperature of 14.4°F (-9.8°C) during the month of January.Humidity
January is the most humid month, with an average relative humidity of 93%.Rainfall
In Halfmoon, in January, during 8.3 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. In Halfmoon, during the entire year, the rain falls for 126.4 days and collects up to 11.22" (285mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. January is the month with the most snowfall in Halfmoon. Snow falls for 18.9 days and accumulates 7.72" (196mm) of snow.Daylight
The average length of the day in January is 8h and 52min.On the first day of the month, sunrise is at 8:28 am and sunset at 4:52 pm. On the last day of January, sunrise is at 8:07 am and sunset at 5:33 pm MST.
Sunshine
January has the least sunshine of the year in Halfmoon, with an average of 3.5h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In January, the UV index of 1 transforms into the following advice:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. The Sun's radiation is especially intense around midday; try to stay in shade during this period. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Frequently asked questions
How cold is January in Halfmoon?
What is the most humid month in Halfmoon?
What is the average humidity in January in Halfmoon?
How many days does it rain in January in Halfmoon?
When does it snow the most in Halfmoon?
How much does it snow in Halfmoon in January?
How many hours of daylight does Halfmoon have in January?
What time are sunrise and sunset in January in Halfmoon?
What is the month with the least sunshine in Halfmoon?
How long on average sun shines in January in Halfmoon?
When is the lowest UV index in Halfmoon?
How high is the UV index in January in Halfmoon?
Average temperature in January
Halfmoon, MT
- Average high temperature in January: 27.1°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 January: 14.4°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 January
Halfmoon, MT
- Average pressure in January: 30.16"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 January
Halfmoon, MT
- Average wind speed in January: 3.9mph
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 January
Halfmoon, MT
- Average humidity in January: 93%
The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (55%).
Average rainfall in January
Halfmoon, MT
- Average rainfall in January: 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 January
Halfmoon, MT
- Average rainfall days in January: 8.3 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 January
Halfmoon, MT
- Average snowfall in January: 7.72"
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 January
Halfmoon, MT
- Average snowfall days in January: 18.9 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 January /
Average sunshine in January
Halfmoon, MT
- Average daylight in January: 8h and 5min
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 January: 3h and 3min
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 January
Halfmoon, MT
- Average sunshine days in January: 11.3 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 January
Halfmoon, MT
- Average UV index in January: 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 January
Halfmoon, MT
- Average cloud cover in January: 65
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 January
Halfmoon, MT
- Average visibility in January: 3mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).
Halfmoon, Montana, USA
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