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 advent presents an average high-temperature of a still subzero cold 27.9°F (-2.3°C), indicating a slight variation from the conditions of the previous month. Throughout January, the average low-temperature dips to a frigid cold 12.9°F (-10.6°C).Humidity
The most humid month is January, with an average relative humidity of 82%.Rainfall
In Jeffrey City, during January, the rain falls for 5.5 days and regularly aggregates up to 0.35" (9mm) of precipitation. In Jeffrey City, during the entire year, the rain falls for 74.8 days and collects up to 5.71" (145mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In January, it is snowing for 10.1 days. Throughout January, 2.36" (60mm) of snow is accumulated. Throughout the year, there are 58.1 snowfall days, and 18.94" (481mm) of snow is accumulated.Daylight
In Jeffrey City, the average length of the day in January is 9h and 29min.On the first day of the month, sunrise is at 7:40 am and sunset at 4:48 pm. On the last day of January, sunrise is at 7:26 am and sunset at 5:23 pm MST.
Sunshine
The average sunshine in January is 6.5h.UV index
January through April, October through December, with an average maximum UV index of 2, 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 the average person.Note: In January, the average maximum UV index of 2 translates into the following recommendations:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January?
What is the most humid month?
What is the average humidity in January?
How much does it rain in January?
How many days does it snow in January?
How many hours of daylight does Jeffrey City have in January?
What time are sunrise and sunset in January?
How long on average sun shines in January?
What is the month with the lowest UV index?
What is the UV index intensity in January in Jeffrey City?
Average temperature in January
Jeffrey City, WY
- Average high temperature in January: 27.9°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (27.1°F).
- Average low temperature in January: 12.9°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (12.9°F).
Average pressure in January
Jeffrey City, WY
- Average pressure in January: 30.2"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in January
Jeffrey City, WY
- Average wind speed in January: 10.6mph
The windiest months (with the highest average wind speed) are April and November (10.9mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).
Average humidity in January
Jeffrey City, WY
- Average humidity in January: 82%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (34%).
Average rainfall in January
Jeffrey City, WY
- Average rainfall in January: 0.35"
The wettest month (with the highest rainfall) is April (0.79").
The driest months (with the least rainfall) are July and August (0.24").
Average rainfall days in January
Jeffrey City, WY
- Average rainfall days in January: 5.5 days
The month with the highest number of rainy days is April (10.3 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in January
Jeffrey City, WY
- Average snowfall in January: 2.36"
The months with the highest snowfall are March and December (3.15").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Jeffrey City, WY
- Average snowfall days in January: 10.1 days
The month with the highest number of snowfall days is December (10.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Jeffrey City, WY
- Average daylight in January: 9h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January: 6h and 3min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).
Average sunshine days in January
Jeffrey City, WY
- Average sunshine days in January: 20.8 days
The month with the most sunshine days is September (22.1 days).
The month with the least sunshine days is April (14.5 days).
Average UV index in January
Jeffrey City, WY
- 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
Jeffrey City, WY
- Average cloud cover in January: 35
The month with the most cloud cover is February (Cloud cover 37).
The months with the least cloud cover are August and September (Cloud cover 13).
Average visibility in January
Jeffrey City, WY
- 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).
Jeffrey City, Wyoming, USA
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