Casper weather in April: Casper, Wyoming: normal highs, lows, rain and records for April
Casper in April has a normal high of 56°F and a normal low of 28°F, a daily mean of 42°F, rising from 54°F on the 1st to 60°F by the 30th. Measurable precipitation falls on 10 days in a normal April, 1.41 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 13°C and low of −2°C, 36 mm of precipitation and 27 cm of snow in April.
- NOAA stationCasper-Natrona County Airport
- Station IDUSW00024089
- Location42.90°N 106.46°W
- Elevation5,338 ft (1,627 m)
- Population58,823
- Jan 35° 15°
- Feb 38° 15°
- Mar 49° 23°
- Apr 56° 28°
- May 67° 37°
- Jun 80° 45°
- Jul 89° 53°
- Aug 87° 51°
- Sep 76° 42°
- Oct 60° 31°
- Nov 46° 22°
- Dec 35° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Casper in April?
The normal high is 56°F and the normal low 28°F, for a daily mean of 42.3°F. April is 6.5°F warmer than March and 9.7°F cooler than May. April is the 7th warmest month of the year in Casper and the 2nd wettest. Across the month the normal high rises 6°F, from 54°F on April 1 to 60°F on April 30. From one year to the next April's mean temperature typically moves about 2.9°F either way (NOAA's standard deviation), so roughly two Aprils in three average between 39°F and 45°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 35%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| April 1 | 54°F | 26°F | 31% | 12% |
| April 8 | 55°F | 27°F | 33% | 14% |
| April 15 | 56°F | 28°F | 34% | 15% |
| April 22 | 58°F | 29°F | 34% | 15% |
| April 30 | 60°F | 31°F | 35% | 16% |
Every day of April: normal high, low and chance of precipitation (warmest afternoon April 30, coldest night April 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| April 1 | 54°F | 26°F | 31% | 12% | 12 h 40 min |
| April 2 | 54°F | 26°F | 32% | 12% | 12 h 40 min |
| April 3 | 54°F | 26°F | 32% | 13% | 12 h 50 min |
| April 4 | 54°F | 27°F | 32% | 13% | 12 h 50 min |
| April 5 | 54°F | 27°F | 32% | 13% | 12 h 50 min |
| April 6 | 54°F | 27°F | 32% | 13% | 13 h |
| April 7 | 55°F | 27°F | 33% | 13% | 13 h |
| April 8 | 55°F | 27°F | 33% | 14% | 13 h |
| April 9 | 55°F | 27°F | 33% | 14% | 13 h |
| April 10 | 55°F | 27°F | 33% | 14% | 13 h 10 min |
| April 11 | 55°F | 27°F | 33% | 14% | 13 h 10 min |
| April 12 | 55°F | 27°F | 34% | 14% | 13 h 10 min |
| April 13 | 56°F | 28°F | 34% | 14% | 13 h 20 min |
| April 14 | 56°F | 28°F | 34% | 15% | 13 h 20 min |
| April 15 | 56°F | 28°F | 34% | 15% | 13 h 20 min |
| April 16 | 56°F | 28°F | 34% | 15% | 13 h 20 min |
| April 17 | 56°F | 28°F | 34% | 15% | 13 h 30 min |
| April 18 | 57°F | 28°F | 34% | 15% | 13 h 30 min |
| April 19 | 57°F | 28°F | 34% | 15% | 13 h 30 min |
| April 20 | 57°F | 29°F | 34% | 15% | 13 h 30 min |
| April 21 | 57°F | 29°F | 34% | 15% | 13 h 40 min |
| April 22 | 58°F | 29°F | 34% | 15% | 13 h 40 min |
| April 23 | 58°F | 29°F | 34% | 15% | 13 h 40 min |
| April 24 | 58°F | 30°F | 34% | 15% | 13 h 50 min |
| April 25 | 58°F | 30°F | 34% | 16% | 13 h 50 min |
| April 26 | 59°F | 30°F | 35% | 16% | 13 h 50 min |
| April 27 | 59°F | 30°F | 35% | 16% | 13 h 50 min |
| April 28 | 59°F | 31°F | 35% | 16% | 14 h |
| April 29 | 60°F | 31°F | 35% | 16% | 14 h |
| April 30 | 60°F | 31°F | 35% | 16% | 14 h |
- Normal high
- 56°FApril average
- Normal low
- 28°FApril average
- Precipitation
- 1.41 inmonth total
- Days with precipitation
- 100.01 inch or more
- Snowfall
- 10.5 inmonth total
- Nights at 32°F or colder
- 21
- Daylight
- 12 h 40 min to 14 hApril 1 to April 30
- Days at 70°F or more
- 5
- Days at 80°F or more
- 1
- Sunshine
- 72%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024089; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Casper in April?
On a given April day the chance of 0.01 inch or more is 33% on average, highest around April 30 (35%). In all, 1.41 in falls on 10 days of a normal April.
In a normal April in Casper, 21 nights fall to freezing, 1 days stay below freezing all day and snowfall averages 10.5 inches.
Snow falls on 6 days in a normal April, and an inch or more covers the ground on 3 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024089.
How humid and windy is Casper in April?
At 3 p.m. the normal temperature is 58°F with 32% relative humidity and a dew point of 28°F; at 6 a.m. it is 37°F with 74% humidity. The wind averages 10.9 mph, most often from the west-northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 37°F | 30°F | 74% | 8.2 mph | 62% |
| 9 a.m. | 49°F | 31°F | 50% | 12.2 mph | 64% |
| noon | 56°F | 29°F | 36% | 13.5 mph | 55% |
| 3 p.m. | 58°F | 28°F | 32% | 14.7 mph | 55% |
| 6 p.m. | 53°F | 29°F | 39% | 13.1 mph | 57% |
| 9 p.m. | 44°F | 31°F | 61% | 9.1 mph | 58% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024089. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for April in Casper?
The warmest April temperature on Casper's official record (since 1939) is 84°F, on April 30, 1992; the coldest is −6°F, on April 12, 1997. The wettest April brought 5.75 in (1941); the snowiest, 56.3 inches (1973).
The April mean against the 1991-2020 normal of 42.3°F: 2021 40.8°F (−1.5), 2022 37.6°F (−4.7), 2023 39.3°F (−3.0), 2024 43.6°F (+1.3), 2025 41.4°F (−0.9), 2026 44.0°F (+1.8). 2 of 6 ran warmer than normal.
| April | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 40.8°F | −1.5°F | 0.87 in |
| 2022 | 37.6°F | −4.7°F | 1.98 in |
| 2023 | 39.3°F | −3.0°F | 1.49 in |
| 2024 | 43.6°F | +1.3°F | 1.22 in |
| 2025 | 41.4°F | −0.9°F | 1.59 in |
| 2026 | 44.0°F | +1.8°F | 1.28 in |
Source: records: ACIS, NWS threaded record CPRthr; recent months: ACIS, station USW00024089. Records and recent months use complete months only.
How does April in Casper compare across Wyoming?
Across the 71 places PlainClimate covers in Wyoming, April normal highs run from 46°F in Sundance to 63°F in Basin; Casper's is 56°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.