Casper Weather in April
Average highs run from 54°F on April 1 to 60°F on April 30, and lows from 29°F to 34°F. Normal precipitation for the month is 1.47 in over about 8 wet days.
April day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
April at a glance
- Average high
- 57°F
- Average low
- 31°F
- Precipitation
- 1.47 in
- Snowfall
- 10.5 in
- Record high
- 84°FApr 30, 1992
- Record low
- -6°FApr 12, 1997
- Chance of a freeze
- 100%
- Daylight
- 12 h 45 min to 14 h 04 min
- Cloud cover
- 65%
- Humidity
- 57%
- Dew point
- 26°F
- Wind
- 11.4 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Apr 1 | 54°F | 29°F | 75°F 2004 | -1°F 1975 | 21% | 21% |
| Apr 2 | 54°F | 29°F | 75°F 2011 | -2°F 1975 | 21% | 21% |
| Apr 3 | 54°F | 29°F | 74°F 2021 | -5°F 2020 | 22% | 21% |
| Apr 4 | 54°F | 29°F | 75°F 2021 | 5°F 1968 | 22% | 21% |
| Apr 5 | 55°F | 29°F | 76°F 1991 | 3°F 2023 | 22% | 21% |
| Apr 6 | 55°F | 29°F | 77°F 1991 | 6°F 1997 | 22% | 21% |
| Apr 7 | 55°F | 29°F | 77°F 1988 | 14°F 1973 | 23% | 21% |
| Apr 8 | 55°F | 30°F | 73°F 1977 | 6°F 1982 | 23% | 21% |
| Apr 9 | 55°F | 30°F | 78°F 1977 | 4°F 1973 | 23% | 20% |
| Apr 10 | 55°F | 30°F | 76°F 1996 | -2°F 1997 | 24% | 20% |
| Apr 11 | 56°F | 30°F | 80°F 2025 | 0°F 1997 | 24% | 20% |
| Apr 12 | 56°F | 30°F | 77°F 2025 | -6°F 1997 | 24% | 20% |
| Apr 13 | 56°F | 30°F | 79°F 2017 | 7°F 2020 | 25% | 20% |
| Apr 14 | 56°F | 30°F | 78°F 2015 | 9°F 1983 | 25% | 20% |
| Apr 15 | 56°F | 30°F | 79°F 1962 | 14°F 1953 | 25% | 19% |
| Apr 16 | 56°F | 31°F | 80°F 1994 | 14°F 1951 | 26% | 19% |
| Apr 17 | 57°F | 31°F | 81°F 1994 | 16°F 1960 | 26% | 19% |
| Apr 18 | 57°F | 31°F | 80°F 2001 | 4°F 2013 | 26% | 18% |
| Apr 19 | 57°F | 31°F | 81°F 1962 | -4°F 1966 | 27% | 18% |
| Apr 20 | 57°F | 31°F | 81°F 1962 | -2°F 1966 | 27% | 18% |
| Apr 21 | 58°F | 32°F | 83°F 1989 | 14°F 1973 | 27% | 17% |
| Apr 22 | 58°F | 32°F | 81°F 1994 | 12°F 1967 | 27% | 17% |
| Apr 23 | 58°F | 32°F | 82°F 1989 | 9°F 2013 | 28% | 17% |
| Apr 24 | 58°F | 32°F | 83°F 2012 | 15°F 1958 | 28% | 16% |
| Apr 25 | 59°F | 32°F | 79°F 1987 | 18°F 2008 | 28% | 16% |
| Apr 26 | 59°F | 33°F | 80°F 1981 | 17°F 1988 | 29% | 15% |
| Apr 27 | 59°F | 33°F | 81°F 1952 | 15°F 1984 | 29% | 15% |
| Apr 28 | 60°F | 33°F | 80°F 1987 | 13°F 1984 | 29% | 15% |
| Apr 29 | 60°F | 34°F | 83°F 1992 | 16°F 1990 | 29% | 14% |
| Apr 30 | 60°F | 34°F | 84°F 1992 | 18°F 1967 | 30% | 14% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- April 1
- sunrise 6:47 AM, sunset 7:32 PM
- April 30
- sunrise 6:01 AM, sunset 8:05 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00481569 (Casper Wwtp), public domain. Records: NOAA GHCN-Daily, station USW00024089, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.