Prosser Weather in April
Average highs run from 60°F on April 1 to 70°F on April 30, and lows from 38°F to 43°F. Normal precipitation for the month is 0.74 in over about 5 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
- 65°F
- Average low
- 40°F
- Precipitation
- 0.74 in
- Record high
- 96°FApr 29, 1926
- Record low
- 15°FApr 15, 1901
- Chance of a freeze
- 72%
- Daylight
- 12 h 50 min to 14 h 20 min
- Cloud cover
- 62%
- Humidity
- 60%
- Dew point
- 35°F
- Wind
- 10.1 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Apr 1 | 60°F | 38°F | 78°F 1911 | 19°F 1936 | 18% |
| Apr 2 | 61°F | 38°F | 81°F 1990 | 16°F 1935 | 18% |
| Apr 3 | 61°F | 38°F | 84°F 1992 | 17°F 1918 | 18% |
| Apr 4 | 61°F | 38°F | 79°F 1951 | 19°F 1896 | 18% |
| Apr 5 | 61°F | 38°F | 85°F 1960 | 22°F 1899 | 18% |
| Apr 6 | 62°F | 38°F | 82°F 1924 | 24°F 1895 | 18% |
| Apr 7 | 62°F | 38°F | 84°F 1934 | 19°F 1901 | 18% |
| Apr 8 | 62°F | 39°F | 88°F 1977 | 21°F 1982 | 18% |
| Apr 9 | 62°F | 39°F | 89°F 1925 | 21°F 1929 | 18% |
| Apr 10 | 63°F | 39°F | 88°F 1925 | 23°F 1933 | 18% |
| Apr 11 | 63°F | 39°F | 84°F 1925 | 22°F 1903 | 18% |
| Apr 12 | 63°F | 39°F | 88°F 1936 | 23°F 1922 | 18% |
| Apr 13 | 64°F | 39°F | 87°F 1947 | 17°F 1911 | 18% |
| Apr 14 | 64°F | 39°F | 88°F 1947 | 21°F 1911 | 18% |
| Apr 15 | 64°F | 40°F | 89°F 1926 | 15°F 1901 | 17% |
| Apr 16 | 65°F | 40°F | 89°F 1926 | 25°F 1909 | 17% |
| Apr 17 | 65°F | 40°F | 88°F 1936 | 20°F 2013 | 17% |
| Apr 18 | 65°F | 40°F | 87°F 1897 | 21°F 1909 | 17% |
| Apr 19 | 66°F | 40°F | 89°F 1934 | 21°F 1927 | 17% |
| Apr 20 | 66°F | 41°F | 91°F 1934 | 18°F 1927 | 17% |
| Apr 21 | 66°F | 41°F | 93°F 1934 | 24°F 1920 | 17% |
| Apr 22 | 67°F | 41°F | 93°F 1934 | 25°F 1920 | 17% |
| Apr 23 | 67°F | 41°F | 87°F 1910 | 27°F 1924 | 17% |
| Apr 24 | 67°F | 41°F | 88°F 1977 | 26°F 1921 | 17% |
| Apr 25 | 68°F | 42°F | 94°F 1910 | 24°F 1924 | 17% |
| Apr 26 | 68°F | 42°F | 89°F 1926 | 27°F 1924 | 17% |
| Apr 27 | 68°F | 42°F | 91°F 1895 | 28°F 1955 | 17% |
| Apr 28 | 69°F | 43°F | 94°F 1926 | 25°F 1907 | 18% |
| Apr 29 | 69°F | 43°F | 96°F 1926 | 28°F 1972 | 18% |
| Apr 30 | 70°F | 43°F | 89°F 1957 | 27°F 1907 | 18% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- April 1
- sunrise 6:38 AM, sunset 7:28 PM
- April 30
- sunrise 5:47 AM, sunset 8:07 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00456768 (Prosser), public domain. Records: NOAA GHCN-Daily, station USC00458207, 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.