Chelan County Weather in May
Average highs run from 63°F on May 1 to 70°F on May 31, and lows from 35°F to 43°F. Normal precipitation for the month is 1.31 in over about 8 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
- 1.31 in
- Snowfall
- 0.1 in
- Record high
- 103°FMay 30, 1986
- Record low
- 32°FMay 4, 1962
- Chance of a freeze
- 89%
- Daylight
- 14 h 32 min to 15 h 45 min
- Cloud cover
- 71%
- Humidity
- 77%
- Dew point
- 36°F
- Wind
- 4.0 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 | 63°F | 35°F | 87°F 1998 | 34°F 1963 | 26% | 1% |
| May 2 | 63°F | 35°F | 85°F 2014 | 35°F 1997 | 26% | 1% |
| May 3 | 64°F | 36°F | 87°F 1966 | 34°F 1996 | 26% | 1% |
| May 4 | 64°F | 36°F | 89°F 1966 | 32°F 1962 | 26% | 1% |
| May 5 | 64°F | 36°F | 91°F 1966 | 32°F 1968 | 25% | 1% |
| May 6 | 64°F | 36°F | 93°F 1992 | 33°F 2002 | 25% | 1% |
| May 7 | 65°F | 37°F | 92°F 1987 | 34°F 1996 | 25% | 0% |
| May 8 | 65°F | 37°F | 93°F 1987 | 35°F 1996 | 25% | 0% |
| May 9 | 65°F | 37°F | 92°F 1987 | 34°F 1985 | 25% | 0% |
| May 10 | 66°F | 38°F | 92°F 2013 | 36°F 1970 | 25% | 0% |
| May 11 | 66°F | 38°F | 92°F 1993 | 32°F 1985 | 25% | 0% |
| May 12 | 66°F | 38°F | 98°F 1993 | 32°F 1985 | 25% | 0% |
| May 13 | 66°F | 38°F | 91°F 1993 | 35°F 1970 | 25% | 0% |
| May 14 | 67°F | 39°F | 93°F 1997 | 36°F 1971 | 25% | 0% |
| May 15 | 67°F | 39°F | 91°F 1973 | 38°F 1974 | 25% | 0% |
| May 16 | 67°F | 39°F | 95°F 2006 | 35°F 1969 | 25% | 0% |
| May 17 | 67°F | 40°F | 96°F 2006 | 37°F 1988 | 25% | 0% |
| May 18 | 68°F | 40°F | 97°F 2006 | 39°F 1965 | 25% | 0% |
| May 19 | 68°F | 40°F | 91°F 2023 | 34°F 1975 | 25% | 0% |
| May 20 | 68°F | 40°F | 92°F 2023 | 35°F 1971 | 25% | 0% |
| May 21 | 68°F | 41°F | 89°F 1963 | 36°F 2010 | 25% | 0% |
| May 22 | 68°F | 41°F | 90°F 1979 | 37°F 1960 | 24% | 0% |
| May 23 | 69°F | 41°F | 93°F 2001 | 38°F 1964 | 24% | 0% |
| May 24 | 69°F | 41°F | 94°F 1999 | 35°F 1975 | 24% | 0% |
| May 25 | 69°F | 42°F | 93°F 1983 | 39°F 1984 | 24% | 0% |
| May 26 | 69°F | 42°F | 89°F 2001 | 40°F 1973 | 24% | 0% |
| May 27 | 69°F | 42°F | 89°F 2005 | 39°F 1977 | 24% | 0% |
| May 28 | 69°F | 42°F | 94°F 1983 | 41°F 1976 | 24% | 0% |
| May 29 | 69°F | 42°F | 98°F 1983 | 40°F 1976 | 23% | 0% |
| May 30 | 70°F | 43°F | 103°F 1986 | 42°F 1984 | 23% | 0% |
| May 31 | 70°F | 43°F | 103°F 1986 | 41°F 1984 | 23% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- May 1
- sunrise 5:44 AM, sunset 8:16 PM
- May 31
- sunrise 5:08 AM, sunset 8:53 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00456534 (Plain), public domain. Records: NOAA GHCN-Daily, station USW00094239, 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.