May weather in Prosser, WA
The average temperature in Prosser in May is 61.0°F (47.9°F–74.1°F). Average precipitation: 0.88 inches.
May is a spring month in Prosser, and is warmer than the annual average of 53°F. Daily temperatures swing about 26.2°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 14h 46m. For travel, May is a comfortable month to visit.
Avg High
74.1°F
Avg Low
47.9°F
Precipitation
0.88 in
Daylight
14h 46m
May records in Prosser
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 90.0°F (1998) | 26.1°F (1954) | 0.36 in (2022) |
| May 2 | 90.0°F (1998) | 25.0°F (1999) | 0.39 in (1933) |
| May 3 | 88.0°F (1937) | 28.0°F (1949) | 0.22 in (1977) |
| May 4 | 88.0°F (2016) | 28.0°F (1949) | 0.51 in (1942) |
| May 5 | 91.0°F (1966) | 28.9°F (1939) | 0.35 in (2017) |
| May 6 | 93.9°F (1966) | 28.0°F (1938) | 0.60 in (1963) |
| May 7 | 97.0°F (1987) | 26.1°F (1930) | 0.38 in (1983) |
| May 8 | 95.0°F (1987) | 27.0°F (1999) | 0.65 in (1972) |
| May 9 | 93.0°F (1987) | 28.9°F (1999) | 0.46 in (1957) |
| May 10 | 93.0°F (1936) | 28.9°F (1935) | 0.60 in (1961) |
| May 11 | 93.0°F (1949) | 28.9°F (1985) | 0.57 in (1951) |
| May 12 | 95.0°F (1949) | 30.0°F (1943) | 0.50 in (1958) |
| May 13 | 99.0°F (1993) | 30.0°F (1955) | 1.49 in (2015) |
| May 14 | 95.0°F (1939) | 30.0°F (1943) | 0.45 in (2017) |
| May 15 | 93.9°F (1939) | 30.9°F (1974) | 1.05 in (2011) |
| May 16 | 91.9°F (1973) | 30.0°F (1974) | 0.63 in (1994) |
| May 17 | 98.1°F (2006) | 30.0°F (1971) | 0.63 in (2019) |
| May 18 | 98.1°F (2006) | 30.0°F (1941) | 0.22 in (1933) |
| May 19 | 98.1°F (2006) | 32.0°F (1975) | 0.28 in (2020) |
| May 20 | 96.1°F (2023) | 30.9°F (1927) | 0.57 in (1960) |
| May 21 | 96.1°F (2023) | 28.9°F (2013) | 0.89 in (1972) |
| May 22 | 91.9°F (1958) | 30.9°F (1930) | 0.22 in (1972) |
| May 23 | 95.0°F (1958) | 32.0°F (1950) | 0.46 in (1946) |
| May 24 | 100.0°F (2001) | 30.9°F (1926) | 0.31 in (1973) |
| May 25 | 97.0°F (1947) | 32.0°F (1930) | 0.48 in (1981) |
| May 26 | 98.1°F (1936) | 32.0°F (1940) | 0.47 in (1980) |
| May 27 | 97.0°F (1934) | 33.1°F (1955) | 0.36 in (1945) |
| May 28 | 99.0°F (1934) | 33.1°F (1976) | 0.22 in (1982) |
| May 29 | 97.0°F (1983) | 32.0°F (1951) | 0.25 in (1934) |
| May 30 | 100.0°F (1983) | 34.0°F (1927) | 0.79 in (1961) |
| May 31 | 93.9°F (2009) | 32.0°F (1955) | 0.75 in (2000) |