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 commencement of January introduces an average high-temperature of a still subzero cold 20.7°F (-6.3°C), closely mirroring the preceding month. During January, Westby consistently records a temperature low averaging an extreme cold 7.2°F (-13.8°C).Humidity
January and February, with an average relative humidity of 88%, are the most humid months in Westby.Rainfall
In Westby, during January, the rain falls for 3.3 days and regularly aggregates up to 0.51" (13mm) of precipitation. In Westby, during the entire year, the rain falls for 93.3 days and collects up to 12.01" (305mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Westby, in January, snow falls for 12.8 days, with typically accumulated 2.87" (73mm) of snow. In Westby, during the entire year, snow falls for 66.5 days and aggregates up to 19.02" (483mm) of snow.Daylight
In January, the average length of the day in Westby is 8h and 49min.On the first day of January in Westby, sunrise is at 8:49 am and sunset at 5:09 pm. On the last day of the month, sunrise is at 8:27 am and sunset at 5:51 pm CST.
Sunshine
In Westby, the average sunshine in January is 4.3h.UV index
In January, the average daily maximum UV index is 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: In January, the maximum UV index of 2 translates into these guidelines:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Always opt for UVA and UVB-resistant sunglasses on radiant days. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January in Westby?
What are the most humid months in Westby?
What is the average humidity in January in Westby?
How many days does it rain in January in Westby?
How many days does it snow in January in Westby?
How many hours of daylight does Westby have in January?
When is the sunrise / sunset in January in Westby?
How many hours of sunshine does Westby have in January?
What is the UV index intensity in January in Westby?
Average temperature in January
Westby, MT
- Average high temperature in January: 20.7°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is February (19.8°F).
- Average low temperature in January: 7.2°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is February (6.3°F).
Average pressure in January
Westby, MT
- Average pressure in January: 30.14"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in January
Westby, MT
- Average wind speed in January: 10.4mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is February (9.2mph).
Average humidity in January
Westby, MT
- Average humidity in January: 88%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is August (46%).
Average rainfall in January
Westby, MT
- Average rainfall in January: 0.51"
The wettest month (with the highest rainfall) is June (2.17").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in January
Westby, MT
- Average rainfall days in January: 3.3 days
The month with the highest number of rainy days is June (13.9 days).
The month with the least rainy days is February (2.6 days).
Average snowfall in January
Westby, MT
- Average snowfall in January: 2.87"
The month with the highest snowfall is November (3.74").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Westby, MT
- Average snowfall days in January: 12.8 days
The month with the highest number of snowfall days is February (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Westby, MT
- Average daylight in January: 8h and 5min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in January: 4h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days in January
Westby, MT
- Average sunshine days in January: 17.2 days
The month with the most sunshine days is August (20.1 days).
The months with the least sunshine days are February and June (13.8 days).
Average UV index in January
Westby, MT
- Average UV index in January: 2
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in January
Westby, MT
- Average cloud cover in January: 55
The month with the most cloud cover is February (Cloud cover 60).
The months with the least cloud cover are July and August (Cloud cover 19).
Average visibility in January
Westby, MT
- Average visibility in January: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Westby, Montana, USA
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