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 average high-temperature stands at a still freezing cold 30.6°F (-0.8°C), showing little deviation from December's 28.4°F (-2°C). In Greycliff, January nights cool down to an average of 17.8°F (-7.9°C).Humidity
In Greycliff, the average relative humidity in January is 79%.Rainfall
The month with the least rainfall in Greycliff is January, when the rain falls for 5.3 days and typically collects 0.47" (12mm) of precipitation.Snowfall
Months with snowfall in Greycliff are January through May, September through December. In Greycliff, Montana, during January, snow falls for 9.6 days and regularly aggregates up to 3.27" (83mm) of snow. Throughout the year, in Greycliff, there are 67.6 snowfall days, and 38.19" (970mm) of snow is accumulated.Daylight
In January, the average length of the day is 9h and 10min.On the first day of the month, sunrise is at 8:00 am and sunset at 4:45 pm. On the last day of January, in Greycliff, sunrise is at 7:42 am and sunset at 5:23 pm MST.
Sunshine
January, February and December, with an average of 6.2h of sunshine, are months with the least sunshine.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 estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: An average maximum UV index of 2 in January leads to these recommendations:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. The solar radiation around mid-day is intense; avoid the Sun and stay safe. During bright days, sunglasses that offer UVA and UVB defense are recommended. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January in Greycliff?
What is the average humidity in January in Greycliff?
What is the driest month in Greycliff?
How much does it rain in Greycliff in January?
How much does it snow in Greycliff in January?
What is the average length of the day in January in Greycliff?
What time are sunrise and sunset in January in Greycliff?
What are the months with the least sunshine in Greycliff?
How long on average sun shines in January in Greycliff?
What is the month with the lowest UV index in Greycliff?
What is the UV index intensity in January in Greycliff?
Average temperature in January
Greycliff, MT
- Average high temperature in January: 30.6°F
The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is December (28.4°F).
- Average low temperature in January: 17.8°F
The month with the highest average low temperature is August (52.9°F).
The coldest month (with the lowest average low temperature) is February (15.3°F).
Average pressure in January
Greycliff, MT
- Average pressure in January: 30.16"Hg
The months with the highest atmospheric pressure are January and December (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in January
Greycliff, MT
- Average wind speed in January: 11.1mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).
Average humidity in January
Greycliff, MT
- Average humidity in January: 79%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is August (47%).
Average rainfall in January
Greycliff, MT
- Average rainfall in January: 0.47"
The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in January
Greycliff, MT
- Average rainfall days in January: 5.3 days
The month with the highest number of rainy days is May (19.8 days).
The months with the least rainy days are January and December (5.3 days).
Average snowfall in January
Greycliff, MT
- Average snowfall in January: 3.27"
The month with the highest snowfall is March (7.09").
The months with the least snowfall are June, July and August (0").
Average snowfall days in January
Greycliff, MT
- Average snowfall days in January: 9.6 days
The month with the highest number of snowfall days is February (12.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in January /
Average sunshine in January
Greycliff, MT
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January: 6h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 12min).
Average sunshine days in January
Greycliff, MT
- Average sunshine days in January: 19.8 days
The month with the most sunshine days is January (19.8 days).
The month with the least sunshine days is May (7.7 days).
Average UV index in January
Greycliff, MT
- Average UV index in January: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in January
Greycliff, MT
- Average cloud cover in January: 36
The month with the most cloud cover is February (Cloud cover 41).
The months with the least cloud cover are July and August (Cloud cover 16).
Average visibility in January
Greycliff, 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).
Greycliff, Montana, USA
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