Grangeville Weather in May
Average highs run from 60°F on May 1 to 66°F on May 31, and lows from 38°F to 45°F. Normal precipitation for the month is 3.44 in over about 13 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
- 64°F
- Average low
- 42°F
- Precipitation
- 3.44 in
- Snowfall
- 0.2 in
- Record high
- 96°FMay 25, 1928
- Record low
- 19°FMay 1, 1954
- Chance of a freeze
- 74%
- Daylight
- 14 h 22 min to 15 h 29 min
- Cloud cover
- 69%
- Humidity
- 68%
- Dew point
- 40°F
- Wind
- 5.1 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 | 60°F | 38°F | 81°F 1998 | 19°F 1954 | 43% | 2% |
| May 2 | 61°F | 38°F | 81°F 2025 | 21°F 1954 | 43% | 2% |
| May 3 | 61°F | 38°F | 83°F 1966 | 26°F 1965 | 43% | 2% |
| May 4 | 61°F | 39°F | 85°F 1966 | 27°F 1959 | 43% | 1% |
| May 5 | 61°F | 39°F | 88°F 1966 | 25°F 1982 | 43% | 1% |
| May 6 | 62°F | 39°F | 85°F 1992 | 26°F 1959 | 43% | 1% |
| May 7 | 62°F | 39°F | 87°F 1987 | 22°F 2010 | 43% | 1% |
| May 8 | 62°F | 40°F | 85°F 1987 | 26°F 1999 | 42% | 1% |
| May 9 | 63°F | 40°F | 86°F 1906 | 27°F 1990 | 42% | 1% |
| May 10 | 63°F | 40°F | 85°F 1940 | 29°F 1943 | 42% | 1% |
| May 11 | 63°F | 41°F | 88°F 1993 | 25°F 1973 | 42% | 1% |
| May 12 | 63°F | 41°F | 91°F 1993 | 20°F 1956 | 42% | 1% |
| May 13 | 64°F | 41°F | 89°F 1931 | 28°F 1985 | 42% | 1% |
| May 14 | 64°F | 41°F | 87°F 1973 | 26°F 1970 | 42% | 1% |
| May 15 | 64°F | 42°F | 90°F 1939 | 29°F 1943 | 43% | 1% |
| May 16 | 64°F | 42°F | 85°F 1970 | 21°F 1974 | 43% | 1% |
| May 17 | 64°F | 42°F | 84°F 1973 | 25°F 1974 | 43% | 1% |
| May 18 | 65°F | 42°F | 88°F 1954 | 25°F 1965 | 43% | 1% |
| May 19 | 65°F | 43°F | 85°F 1993 | 26°F 1974 | 43% | 0% |
| May 20 | 65°F | 43°F | 84°F 1958 | 28°F 1931 | 43% | 0% |
| May 21 | 65°F | 43°F | 92°F 1928 | 28°F 1973 | 43% | 0% |
| May 22 | 65°F | 43°F | 88°F 1988 | 25°F 1960 | 43% | 0% |
| May 23 | 65°F | 43°F | 90°F 2001 | 27°F 1964 | 43% | 0% |
| May 24 | 65°F | 44°F | 93°F 1934 | 28°F 1975 | 43% | 0% |
| May 25 | 66°F | 44°F | 96°F 1928 | 28°F 1984 | 43% | 0% |
| May 26 | 66°F | 44°F | 90°F 1928 | 28°F 1967 | 43% | 0% |
| May 27 | 66°F | 44°F | 89°F 1934 | 29°F 1973 | 43% | 0% |
| May 28 | 66°F | 44°F | 91°F 1934 | 30°F 1977 | 43% | 0% |
| May 29 | 66°F | 45°F | 90°F 1986 | 28°F 1977 | 43% | 0% |
| May 30 | 66°F | 45°F | 90°F 1986 | 31°F 1979 | 43% | 0% |
| May 31 | 66°F | 45°F | 92°F 2025 | 31°F 1951 | 43% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- May 1
- sunrise 5:31 AM, sunset 7:53 PM
- May 31
- sunrise 4:58 AM, sunset 8:27 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00103771 (Grangeville), public domain. Records: NOAA GHCN-Daily, station USC00103771, 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.