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
Casper marks the onset of January with an average high-temperature of a still subzero cold 28.9°F (-1.7°C), subtly divergent from December's 28.4°F (-2°C). Casper in January anticipates an average nighttime temperature of 15.6°F (-9.1°C).Humidity
With an average relative humidity of 79%, January is the most humid month in Casper.Rainfall
January, August and September are months with the least rain in Casper when the rain falls for 3.6 days and typically aggregates up to 0.43" (11mm) of rain.Snowfall
January through May, September through December are months with snowfall in Casper. In January, in Casper, Wyoming, it is snowing for 10.1 days. Throughout January, 3.54" (90mm) of snow is accumulated. In Casper, during the entire year, snow falls for 61.5 days and aggregates up to 32.13" (816mm) of snow.Daylight
In January, the average length of the day in Casper is 9h and 28min.On the first day of the month, sunrise is at 7:36 am and sunset at 4:41 pm. On the last day of January, in Casper, Wyoming, sunrise is at 7:21 am and sunset at 5:16 pm MST.
Sunshine
The average sunshine in January is 6.6h.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 minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 2 during January leads to these instructions:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Casper in January?
What is the most humid month in Casper?
What is the average humidity in January in Casper?
What is the driest month in Casper?
How much does it rain in Casper in January?
How much does it snow in Casper in January?
How many hours of daylight does Casper have in January?
What time are sunrise and sunset in January in Casper?
How long on average sun shines in January in Casper?
When is the lowest UV index in Casper?
What is the UV index reading in January in Casper?
Average temperature in January
Casper, WY
- Average high temperature in January: 28.9°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is December (28.4°F).
- Average low temperature in January: 15.6°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is December (15.1°F).
Average pressure in January
Casper, WY
- Average pressure in January: 30.16"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in January
Casper, WY
- Average wind speed in January: 12.1mph
The windiest month (with the highest average wind speed) is January (12.1mph).
The calmest months (with the lowest average wind speed) are July and August (8.5mph).
Average humidity in January
Casper, WY
- Average humidity in January: 79%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (37%).
Average rainfall in January
Casper, WY
- Average rainfall in January: 0.43"
The wettest month (with the highest rainfall) is May (1.77").
The driest months (with the least rainfall) are January, August and September (0.43").
Average rainfall days in January
Casper, WY
- Average rainfall days in January: 3.6 days
The month with the highest number of rainy days is May (14.1 days).
The month with the least rainy days is January (3.6 days).
Average snowfall in January
Casper, WY
- Average snowfall in January: 3.54"
The month with the highest snowfall is November (5.47").
The months with the least snowfall are June, July and August (0").
Average snowfall days in January
Casper, WY
- Average snowfall days in January: 10.1 days
The month with the highest number of snowfall days is February (11.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in January /
Average sunshine in January
Casper, WY
- Average daylight in January: 9h and 3min
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 months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 6min).
Average sunshine days in January
Casper, WY
- Average sunshine days in January: 20.3 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.9 days).
Average UV index in January
Casper, WY
- Average UV index in January: 2
The months with the highest UV index are June, July and August (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
Casper, WY
- Average cloud cover in January: 31
The month with the most cloud cover is February (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in January
Casper, 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).
Casper, Wyoming, USA
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