Casper in Winter
In winter (December, January and February), Casper sees average daytime highs around 30°F and overnight lows near 13°F, with 2.7 in of precipitation over about 17 wet days across the season. It is the coldest season of the year and the 3rd-wettest season.
Across winter, daytime highs hold fairly steady around 30°F. The sky is clear or mostly clear about 40% of the time across winter, and the air most often feels dry.
Winter is Casper's weakest season of the year to visit on our travel score. For the whole year in context, see Casper's year-round climate.
- Avg daytime high
- 30°F
- coldest season of the year
- Avg overnight low
- 13°F
- Precipitation
- 2.7 in
- 17 wet days
- Avg wind
- 9 mph
- Travel score
- 0.0
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Casper in Winter
Across winter, daytime highs hold fairly steady around 30°F.
A typical winter day in Casper reaches about 30°F and drops to 13°F overnight. The warmest of the three months is February, the coolest January.
How winter really feels in Casper
Once humidity and wind are folded in, winter brings about 0 days that feel above 90°F and 90 that feel at or below 32°F.
The story in winter is cold — wind chill drags the overnight "feels like" below the raw low.
Casper weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 29° / 12° | 0.8 | 5.6 | 5.7 | 9.2 | 0.0 |
| Feb | 32° / 13° | 1.0 | 5.9 | 5.8 | 10.2 | 0.0 |
| Mar | 42° / 22° | 1.5 | 7.1 | 6 | 11.6 | 0.5 |
| Apr | 50° / 29° | 2.3 | 10.8 | 7 | 13.1 | 2.3 |
| May | 62° / 39° | 2.7 | 11.1 | 2.3 | 14.4 | 5.0 |
| Jun | 75° / 49° | 1.4 | 6.3 | 0.1 | 15.1 | 7.5 |
| Jul | 84° / 56° | 0.7 | 4.5 | 0 | 14.8 | 6.5 |
| Aug | 82° / 55° | 0.6 | 4.1 | 0 | 13.8 | 7.3 |
| Sep | 71° / 46° | 1.1 | 5.6 | 0.7 | 12.3 | 7.5 |
| Oct | 55° / 33° | 1.8 | 7 | 4.1 | 10.8 | 4.0 |
| Nov | 41° / 22° | 1.1 | 5.7 | 5.5 | 9.5 | 0.4 |
| Dec | 30° / 13° | 0.9 | 5.6 | 6.1 | 8.9 | 0.0 |
Cloud cover in Winter
The sky is clear or mostly clear about 40% of the time across winter.
Chance of precipitation in Winter
Casper gets around 2.7 in of rain and snow over 17 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 9 mph across winter.
Sunrise & sunset in Winter
Daylight runs from about 9 h 06 min in early December to 10 h 54 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 2.8 kWh/m².
Is winter a good time to visit Casper?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a weaker month for outdoor sightseeing in Casper.
What to pack for Casper in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Casper sees daytime highs around 30°F and nights near 13°F. Pack a warm layer and a heavy coat. About 17 days see rain.
UV index in Casper in Winter
Clear-sky midday UV across winter averages around 2. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Casper peaks around July 11 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 5 | 6 | 8 | 10 | 10 | 8 | 7 | 4 | 3 | 2 |
| Level | Low | Moderate | High | High | Very high | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | High |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 10 | Very high |
| Jul | 10 | Very high |
| Aug | 8 | Very high |
| Sep | 7 | High |
| Oct | 4 | Moderate |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Where is Casper?
Casper sits at 42.9°N, 106.3°W, 5,118 ft above sea level, in United States. The nearest listed city is Gillette, 106 mi away.
Topography around Casper
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Casper.
Within 2 miles, the terrain around Casper has only modest variations in elevation — a maximum elevation change of 282 ft around an average of 5,180 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,173 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,770 ft.
The land around Casper is covered by grassland (49%) and artificial surfaces (32%) within 2 miles, grassland (81%) within 10 miles, and grassland (91%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Casper (42.8666°, -106.3131°, elevation 5,118 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.