Casper, WY weather in April
Casper is cool and snowy in April: highs average 56°F and nights drop to about 28°F. There are about 10 days with rain or snow. Snowfall averages about 10.5 in. Expect snow on the ground at times.
- Normal high
- 56°F
- Normal low
- 28°F
- Wet days
- 10
- 1.4 in total
- Snowfall
- 10.5 in
- snow on the ground 3 days
How April changes from start to finish
| April 1 | April 30 | |
|---|---|---|
| Normal high | 54°F | 60°F |
| Normal low | 26°F | 31°F |
| Chance of a wet day | 32% | 35% |
| Sunrise / sunset | 6:47 am / 7:31 pm | 6:00 am / 8:04 pm |
| Daylight | 12.7 h | 14.1 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 April day
- 6 am34°Fdew point 26°F
- 9 am45°Fdew point 28°F
- Noon52°Fdew point 26°F
- 3 pm54°Fdew point 25°F
- 6 pm49°Fdew point 26°F
- 9 pm40°Fdew point 28°F
NOAA hourly normals (local standard time) from Casper Natrona Co Airport (8 mi away); average wind 12 mph; clear or few clouds in 56% of daytime hours, mostly cloudy or overcast in 36%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F8 of 30
- Hot dayshigh 90°F or more0 of 30
- Muggy daysdaily mean dew point 65°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow10 of 30
- Notable rainat least 0.10 in5 of 30
- Freezing nightslow 32°F or below21 of 30
- Snow on the groundsnow depth 1 in or more3 of 30
Average days per April, counted from daily records for each year 1991-2020.
Rain and snow in April
Normal precipitation is 1.4 in; a dry April brings about 1.0 in and a wet one about 1.7 in (25th and 75th percentiles). Days with half an inch or more are rare. Normal snowfall is 10.5 in, with about 3 days of an inch or more.
How April varies from year to year
- Warmest April, 1991-20201992: average high 65°F
- Coolest April1997: average high 48°F
- Wettest April2016: 3.6 in
- Driest April1992: 0.08 in
- Highest reading84°F (April 30, 1992)
- Lowest reading-6°F (April 12, 1997)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
April compared with March and May
| March | April | May | |
|---|---|---|---|
| Normal high | 49°F | 56°F | 67°F |
| Normal low | 23°F | 28°F | 37°F |
| Wet days | 8 | 10 | 11 |
| Comfortable days | 3 | 8 | 15 |
| Daylight | 11.9 h | 13.4 h | 14.7 h |
Highs change by +7°F from March and +11°F into May.
Nearby alternatives in April
- Warmer: Fort Collins, CO170 mi · high 63°F · 9 wet days
- Cooler: Keystone, SD162 mi · high 51°F · 10 wet days
How Casper ranks in April
- Normal high320th warmest of 378 cities; 2nd of 4 in Wyoming
- Wet days238th driest of 378
- Comfortable days227th most of 340
What to pack for Casper in April
- A warm jacket – lows near 28°F, highs near 56°F
- Layers – afternoons near 56°F but nights near 28°F
- A rain jacket or umbrella – rain or snow on about 10 days
- Waterproof boots – about 10.5 in of snow in a typical year
- A hat and gloves – about 21 freezing nights
Heating and cooling
April has 683 heating degree days and 0 cooling degree days (base 65°F), 9% of the year's total heating and cooling demand.
Questions
How cold is Casper in April?
The normal high is 56°F and the normal low is 28°F. From 1991 to 2020 the coldest April reading was -6°F (April 12, 1997).
Does it rain a lot in Casper in April?
About 10 days in April have at least 0.01 in of precipitation, and the normal total is 1.4 in. The wettest April in 1991-2020 was in 2016 (3.6 in); the driest was in 1992 (0.08 in).
Does it snow in Casper in April?
Yes. Normal snowfall in April is 10.5 in, and snow covers the ground on about 3 days.
Is April a good time to visit Casper?
April ranks 4th of 12 months on our comfort score for Casper (61 out of 100). It has about 8 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.