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 is the coldest month of the year, registering average temperatures as high as 23.4°F (-4.8°C) and as low as 9.9°F (-12.3°C).Humidity
The most humid month is January, with an average relative humidity of 87%.Rainfall
The month with the least rainfall is January, when the rain falls for 3.2 days and typically collects 0.24" (6mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Sidney, during January, snow falls for 10.6 days and regularly aggregates up to 1.3" (33mm) of snow. In Sidney, during the entire year, snow falls for 56.1 days and aggregates up to 8.94" (227mm) of snow.Daylight
In January, the average length of the day is 8h and 56min.On the first day of the month, sunrise is at 7:45 am and sunset at 4:15 pm. On the last day of January, in Sidney, sunrise is at 7:24 am and sunset at 4:55 pm MST.
Sunshine
In January, the average sunshine is 4.6h.UV index
January and February, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 1 during January leads to these advisories:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Stay sun-safe with clothing that is both closely woven and worn loosely. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
How cold is January?
What is the most humid month?
What is the average humidity in January?
What is the driest month?
How many days does it rain in January in Sidney?
How many days does it snow in January?
How many hours of daylight does Sidney have in January?
When is the sunrise / sunset in January?
How many hours of sunshine does Sidney have in January?
What are the months with the lowest UV index?
How high is the UV index in January?
Average temperature in January
Sidney, MT
- Average high temperature in January: 23.4°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (23.4°F).
- Average low temperature in January: 9.9°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure in January
Sidney, MT
- Average pressure in January: 30.15"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 January
Sidney, MT
- Average wind speed in January: 10.4mph
The windiest months (with the highest average wind speed) are April and October (11.1mph).
The calmest month (with the lowest average wind speed) is February (9.2mph).
Average humidity in January
Sidney, MT
- Average humidity in January: 87%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (45%).
Average rainfall in January
Sidney, MT
- Average rainfall in January: 0.24"
The wettest month (with the highest rainfall) is July (1.34").
The driest month (with the least rainfall) is January (0.24").
Average rainfall days in January
Sidney, MT
- Average rainfall days in January: 3.2 days
The month with the highest number of rainy days is June (11.4 days).
The months with the least rainy days are January and February (3.2 days).
Average snowfall in January
Sidney, MT
- Average snowfall in January: 1.3"
The month with the highest snowfall is February (1.77").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Sidney, MT
- Average snowfall days in January: 10.6 days
The month with the highest number of snowfall days is February (12 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Sidney, MT
- Average daylight in January: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in January: 4h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in January
Sidney, MT
- Average sunshine days in January: 19.3 days
The month with the most sunshine days is September (20.7 days).
The month with the least sunshine days is April (15.8 days).
Average UV index in January
Sidney, MT
- Average UV index in January: 1
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover in January
Sidney, MT
- Average cloud cover in January: 51
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 18).
Average visibility in January
Sidney, MT
- Average visibility in January: 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).
Sidney, Montana, USA
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