Casper, WY weather in January
In January, Casper sees highs around 35°F and lows around 15°F: cold, with some rain and some snow. There are about 6 days with rain or snow. Snowfall averages about 9.0 in. It is one of the coldest months in Casper. Dress for deep cold.
- Normal high
- 35°F
- Normal low
- 15°F
- Wet days
- 6
- 0.5 in total
- Snowfall
- 9.0 in
- snow on the ground 17 days
How January changes from start to finish
| January 1 | January 31 | |
|---|---|---|
| Normal high | 34°F | 36°F |
| Normal low | 14°F | 15°F |
| Chance of a wet day | 21% | 22% |
| Sunrise / sunset | 7:36 am / 4:41 pm | 7:20 am / 5:16 pm |
| Daylight | 9.1 h | 9.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Mountain Time).
A typical January day
- 6 am23°Fdew point 13°F
- 9 am25°Fdew point 14°F
- Noon31°Fdew point 16°F
- 3 pm33°Fdew point 17°F
- 6 pm27°Fdew point 16°F
- 9 pm24°Fdew point 15°F
NOAA hourly normals (local standard time) from Casper Natrona Co Airport (8 mi away); average wind 15 mph; clear or few clouds in 67% of daytime hours, mostly cloudy or overcast in 28%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow6 of 31
- Notable rainat least 0.10 in2 of 31
- Freezing nightslow 32°F or below29 of 31
- Snow on the groundsnow depth 1 in or more17 of 31
Average days per January, counted from daily records for each year 1991-2020.
Rain and snow in January
Normal precipitation is 0.5 in; a dry January brings about 0.3 in and a wet one about 0.7 in (25th and 75th percentiles). Days with half an inch or more are rare. Normal snowfall is 9.0 in, with about 3 days of an inch or more.
How January varies from year to year
- Warmest January, 1991-20202003: average high 44°F
- Coolest January2007: average high 28°F
- Wettest January2009: 1.1 in
- Driest January2004: 0.03 in
- Highest reading58°F (January 27, 2015)
- Lowest reading-28°F (January 5, 2017)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
January compared with December and February
| December | January | February | |
|---|---|---|---|
| Normal high | 35°F | 35°F | 38°F |
| Normal low | 15°F | 15°F | 15°F |
| Wet days | 7 | 6 | 7 |
| Comfortable days | 0 | 0 | 0 |
| Daylight | 9.1 h | 9.4 h | 10.6 h |
Highs change by 0°F from December and +3°F into February.
Nearby alternatives in January
- Warmer: Fort Collins, CO170 mi · high 45°F · 4 wet days
- Cooler: Steamboat Springs, CO167 mi · high 29°F · 15 wet days
How Casper ranks in January
- Normal high300th warmest of 378 cities; 3rd of 4 in Wyoming
- Wet days68th driest of 378
- Comfortable days338th most of 339
What to pack for Casper in January
- A warm jacket – lows near 15°F, highs near 35°F
- Waterproof boots – snow on the ground on about 17 days
- A hat and gloves – about 29 freezing nights
Heating and cooling
January has 1237 heating degree days and 0 cooling degree days (base 65°F), 16% of the year's total heating and cooling demand.
Questions
How cold is Casper in January?
The normal high is 35°F and the normal low is 15°F. From 1991 to 2020 the coldest January reading was -28°F (January 5, 2017).
Does it rain a lot in Casper in January?
About 6 days in January have at least 0.01 in of precipitation, and the normal total is 0.5 in. The wettest January in 1991-2020 was in 2009 (1.1 in); the driest was in 2004 (0.03 in).
Does it snow in Casper in January?
Yes. Normal snowfall in January is 9.0 in, and snow covers the ground on about 17 days.
Is January a good time to visit Casper?
January ranks 11th of 12 months on our comfort score for Casper (32 out of 100). It has almost no comfortable days. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates, humidity and wind by hour and cloud cover: Casper Natrona Co Airport (USW00024089), 7.9 mi WNW of the city center, 5,338 ft (233 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Natrona County International Airport (725690-24089), 8.4 mi WNW of the city center, 5,319 ft (214 ft higher than the city). Hourly observations, 1991-2020.