Corvallis Weather in May
Average highs run from 62°F on May 1 to 71°F on May 31, and lows from 35°F to 42°F. Normal precipitation for the month is 1.55 in over about 11 wet days.
May day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 67°F
- Average low
- 39°F
- Precipitation
- 1.55 in
- Record high
- 102°FMay 30, 1936
- Record low
- 18°FMay 6, 1903
- Chance of a freeze
- 97%
- Daylight
- 14 h 24 min to 15 h 31 min
- Cloud cover
- 69%
- Humidity
- 71%
- Dew point
- 35°F
- Wind
- 4.3 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 |
|---|---|---|---|---|---|---|
| May 1 | 62°F | 35°F | 83°F 2000 | 21°F 1954 | 33% | 0% |
| May 2 | 63°F | 35°F | 85°F 1985 | 22°F 1954 | 33% | 0% |
| May 3 | 63°F | 36°F | 88°F 1903 | 25°F 1907 | 33% | 0% |
| May 4 | 63°F | 36°F | 86°F 1966 | 26°F 1922 | 33% | 0% |
| May 5 | 64°F | 36°F | 86°F 1966 | 21°F 2010 | 33% | 0% |
| May 6 | 64°F | 36°F | 86°F 1992 | 18°F 1903 | 34% | 0% |
| May 7 | 64°F | 37°F | 86°F 1987 | 22°F 2010 | 34% | 0% |
| May 8 | 65°F | 37°F | 89°F 1901 | 22°F 2010 | 34% | 0% |
| May 9 | 65°F | 37°F | 85°F 1994 | 23°F 2022 | 34% | 0% |
| May 10 | 66°F | 37°F | 89°F 1940 | 21°F 1946 | 34% | 0% |
| May 11 | 66°F | 38°F | 89°F 1993 | 24°F 2022 | 34% | 0% |
| May 12 | 66°F | 38°F | 90°F 1993 | 24°F 1985 | 35% | 0% |
| May 13 | 66°F | 38°F | 92°F 1931 | 25°F 1953 | 35% | 0% |
| May 14 | 67°F | 38°F | 90°F 1931 | 28°F 1986 | 35% | 0% |
| May 15 | 67°F | 39°F | 99°F 1934 | 27°F 1986 | 35% | 0% |
| May 16 | 67°F | 39°F | 90°F 2012 | 26°F 1974 | 35% | 0% |
| May 17 | 68°F | 39°F | 86°F 2007 | 27°F 1974 | 36% | 0% |
| May 18 | 68°F | 39°F | 88°F 1901 | 28°F 1965 | 36% | 0% |
| May 19 | 68°F | 40°F | 90°F 2009 | 26°F 1974 | 36% | 0% |
| May 20 | 68°F | 40°F | 89°F 1958 | 30°F 1903 | 36% | 0% |
| May 21 | 69°F | 40°F | 89°F 1919 | 28°F 1931 | 37% | 0% |
| May 22 | 69°F | 40°F | 90°F 1919 | 24°F 2010 | 37% | 0% |
| May 23 | 69°F | 41°F | 90°F 2001 | 27°F 1930 | 37% | 0% |
| May 24 | 69°F | 41°F | 93°F 2001 | 30°F 1975 | 37% | 0% |
| May 25 | 70°F | 41°F | 91°F 1928 | 28°F 1904 | 37% | 0% |
| May 26 | 70°F | 41°F | 94°F 1936 | 27°F 1930 | 37% | 0% |
| May 27 | 70°F | 41°F | 95°F 1936 | 28°F 1973 | 38% | 0% |
| May 28 | 70°F | 42°F | 92°F 1919 | 27°F 1922 | 38% | 0% |
| May 29 | 70°F | 42°F | 93°F 1936 | 29°F 1951 | 38% | 0% |
| May 30 | 71°F | 42°F | 102°F 1936 | 30°F 1979 | 38% | 0% |
| May 31 | 71°F | 42°F | 94°F 1986 | 25°F 1917 | 38% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- May 1
- sunrise 6:22 AM, sunset 8:46 PM
- May 31
- sunrise 5:49 AM, sunset 9:20 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00248783 (Western Ag Rsch Ctr), public domain. Records: NOAA GHCN-Daily, station USC00243885, 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.