Prosser Weather in July
Average highs run from 86°F on July 1 to 92°F on July 31, and lows from 57°F to 61°F. Normal precipitation for the month is 0.21 in over about 2 wet days.
July day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
July at a glance
- Average high
- 90°F
- Average low
- 60°F
- Precipitation
- 0.21 in
- Record high
- 112°FJul 27, 1939
- Record low
- 39°FJul 2, 1955
- Chance of a freeze
- 1%
- Days of 90°F or more
- 17.9
- Daylight
- 15 h 42 min to 14 h 50 min
- Cloud cover
- 30%
- Humidity
- 46%
- Dew point
- 49°F
- Wind
- 9.2 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 |
|---|---|---|---|---|---|
| Jul 1 | 86°F | 57°F | 106°F 1924 | 42°F 1910 | 8% |
| Jul 2 | 86°F | 57°F | 106°F 1924 | 39°F 1955 | 8% |
| Jul 3 | 87°F | 57°F | 108°F 1922 | 39°F 1921 | 8% |
| Jul 4 | 87°F | 57°F | 103°F 1967 | 41°F 1916 | 7% |
| Jul 5 | 88°F | 58°F | 104°F 1926 | 42°F 1902 | 7% |
| Jul 6 | 88°F | 58°F | 106°F 1975 | 40°F 1902 | 7% |
| Jul 7 | 88°F | 58°F | 108°F 1968 | 40°F 1902 | 7% |
| Jul 8 | 89°F | 58°F | 102°F 1968 | 41°F 1911 | 7% |
| Jul 9 | 89°F | 59°F | 105°F 1919 | 42°F 1921 | 7% |
| Jul 10 | 89°F | 59°F | 105°F 1952 | 42°F 1921 | 6% |
| Jul 11 | 90°F | 59°F | 105°F 1926 | 41°F 1932 | 6% |
| Jul 12 | 90°F | 59°F | 107°F 2002 | 40°F 1943 | 6% |
| Jul 13 | 90°F | 59°F | 109°F 2002 | 39°F 1913 | 6% |
| Jul 14 | 91°F | 60°F | 109°F 2002 | 40°F 1903 | 6% |
| Jul 15 | 91°F | 60°F | 108°F 1919 | 42°F 1924 | 6% |
| Jul 16 | 91°F | 60°F | 108°F 1941 | 41°F 1904 | 6% |
| Jul 17 | 91°F | 60°F | 107°F 1918 | 41°F 1909 | 6% |
| Jul 18 | 92°F | 60°F | 106°F 1917 | 40°F 1919 | 6% |
| Jul 19 | 92°F | 61°F | 107°F 1960 | 44°F 1926 | 6% |
| Jul 20 | 92°F | 61°F | 105°F 1931 | 44°F 1929 | 6% |
| Jul 21 | 92°F | 61°F | 105°F 1938 | 42°F 1914 | 6% |
| Jul 22 | 92°F | 61°F | 105°F 1994 | 43°F 1934 | 6% |
| Jul 23 | 92°F | 61°F | 107°F 2006 | 41°F 1917 | 5% |
| Jul 24 | 92°F | 61°F | 111°F 2006 | 44°F 1948 | 5% |
| Jul 25 | 92°F | 61°F | 107°F 2006 | 43°F 1929 | 5% |
| Jul 26 | 93°F | 61°F | 108°F 1939 | 42°F 1908 | 5% |
| Jul 27 | 93°F | 61°F | 112°F 1939 | 40°F 1895 | 5% |
| Jul 28 | 93°F | 61°F | 110°F 1998 | 40°F 1912 | 5% |
| Jul 29 | 93°F | 61°F | 109°F 1998 | 39°F 1917 | 5% |
| Jul 30 | 92°F | 61°F | 106°F 2003 | 44°F 1908 | 5% |
| Jul 31 | 92°F | 61°F | 106°F 2003 | 42°F 1937 | 5% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- July 1
- sunrise 5:12 AM, sunset 8:54 PM
- July 31
- sunrise 5:40 AM, sunset 8:30 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.