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
In January, Riverton experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 30.9°F (-0.6°C) in December to a still subzero cold 31.5°F (-0.3°C). An average nighttime temperature of 14.5°F (-9.7°C) is witnessed throughout January.Humidity
With an average relative humidity of 77%, January is the most humid month.Rainfall
January is the month with the least rainfall. Rain falls for 2.5 days and accumulates 0.24" (6mm) of precipitation.Snowfall
Months with snowfall in Riverton are January through May, September through December. In Riverton, during January, snow falls for 5.6 days and regularly aggregates up to 1.69" (43mm) of snow. In Riverton, during the entire year, snow falls for 42.8 days and aggregates up to 25.47" (647mm) of snow.Daylight
In January, the average length of the day is 9h and 26min.On the first day of the month, sunrise is at 7:44 am and sunset at 4:49 pm. On the last day of January, sunrise is at 7:29 am and sunset at 5:24 pm MST.
Sunshine
With an average of 6.6h of sunshine, January has the least sunshine of the year.UV index
January, February, November and 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 unsafe exposure to UV radiation for ordinary individuals.Note: In January, the maximum UV index of 2 suggests these recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Stay sun-safe with clothing that is both closely woven and worn loosely. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in January?
What is the most humid month?
What is the average humidity in January?
What is the driest month?
How much does it rain in January?
How many days does it snow in January?
What is the average length of the day in January?
When is the sunrise / sunset in January?
What is the month with the least sunshine?
How many hours of sunshine does Riverton have in January?
When is the lowest UV index?
How high is the UV index in January?
Average temperature in January
Riverton, WY
- Average high temperature in January: 31.5°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is December (30.9°F).
- Average low temperature in January: 14.5°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (14.5°F).
Average pressure in January
Riverton, WY
- Average pressure in January: 30.22"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in January
Riverton, WY
- Average wind speed in January: 5.5mph
The windiest month (with the highest average wind speed) is June (7.5mph).
The calmest month (with the lowest average wind speed) is January (5.5mph).
Average humidity in January
Riverton, WY
- Average humidity in January: 77%
The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are July and August (31%).
Average rainfall in January
Riverton, WY
- Average rainfall in January: 0.24"
The wettest month (with the highest rainfall) is May (1.42").
The driest month (with the least rainfall) is January (0.24").
Average rainfall days in January
Riverton, WY
- Average rainfall days in January: 2.5 days
The month with the highest number of rainy days is May (9.9 days).
The month with the least rainy days is January (2.5 days).
Average snowfall in January
Riverton, WY
- Average snowfall in January: 1.69"
The month with the highest snowfall is April (5.39").
The months with the least snowfall are June, July and August (0").
Average snowfall days in January
Riverton, WY
- Average snowfall days in January: 5.6 days
The month with the highest number of snowfall days is February (7.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in January /
Average sunshine in January
Riverton, WY
- Average daylight in January: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January: 6h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 36min).
Average sunshine days in January
Riverton, WY
- Average sunshine days in January: 24.5 days
The month with the most sunshine days is January (24.5 days).
The month with the least sunshine days is April (15.5 days).
Average UV index in January
Riverton, WY
- Average UV index in January: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Riverton, WY
- Average cloud cover in January: 25
The months with the most cloud cover are February and April (Cloud cover 28).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in January
Riverton, 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).
Riverton, Wyoming, USA
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