Trail Weather in May
Average highs run from 68°F on May 1 to 76°F on May 31, and lows from 40°F to 45°F. Normal precipitation for the month is 2.03 in over about 10 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
- 72°F
- Average low
- 43°F
- Precipitation
- 2.03 in
- Record high
- 103°FMay 30, 1986
- Record low
- 28°FMay 1, 1954
- Chance of a freeze
- 41%
- Days of 90°F or more
- 1.7
- Daylight
- 14 h 06 min to 15 h 06 min
- Cloud cover
- 57%
- Humidity
- 80%
- Dew point
- 46°F
- Wind
- 3.6 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 | 68°F | 40°F | 92°F 1946 | 28°F 1954 | 38% | 0% |
| May 2 | 69°F | 40°F | 91°F 1945 | 30°F 2001 | 37% | 0% |
| May 3 | 69°F | 40°F | 95°F 1992 | 31°F 1928 | 37% | 0% |
| May 4 | 69°F | 41°F | 98°F 1992 | 28°F 1996 | 36% | 0% |
| May 5 | 69°F | 41°F | 97°F 1992 | 30°F 1978 | 36% | 0% |
| May 6 | 70°F | 41°F | 101°F 1987 | 28°F 1968 | 35% | 0% |
| May 7 | 70°F | 41°F | 97°F 1987 | 30°F 1965 | 35% | 0% |
| May 8 | 70°F | 41°F | 96°F 1987 | 31°F 1990 | 34% | 0% |
| May 9 | 71°F | 42°F | 95°F 1936 | 33°F 1965 | 34% | 0% |
| May 10 | 71°F | 42°F | 95°F 1931 | 31°F 1983 | 34% | 0% |
| May 11 | 71°F | 42°F | 97°F 1997 | 33°F 1943 | 33% | 0% |
| May 12 | 72°F | 42°F | 96°F 1936 | 33°F 1935 | 33% | 0% |
| May 13 | 72°F | 42°F | 95°F 1973 | 32°F 1955 | 33% | 0% |
| May 14 | 72°F | 42°F | 96°F 2014 | 33°F 1943 | 33% | 0% |
| May 15 | 72°F | 43°F | 98°F 2008 | 34°F 1980 | 32% | 0% |
| May 16 | 73°F | 43°F | 102°F 2008 | 32°F 1962 | 32% | 0% |
| May 17 | 73°F | 43°F | 100°F 2008 | 32°F 1971 | 32% | 0% |
| May 18 | 73°F | 43°F | 96°F 2006 | 32°F 2003 | 32% | 0% |
| May 19 | 73°F | 43°F | 95°F 2008 | 34°F 1941 | 32% | 0% |
| May 20 | 74°F | 43°F | 93°F 1963 | 33°F 1976 | 31% | 0% |
| May 21 | 74°F | 44°F | 96°F 2001 | 34°F 1975 | 31% | 0% |
| May 22 | 74°F | 44°F | 100°F 1941 | 33°F 1964 | 31% | 0% |
| May 23 | 74°F | 44°F | 96°F 2017 | 35°F 1944 | 30% | 0% |
| May 24 | 74°F | 44°F | 98°F 1928 | 33°F 1961 | 30% | 0% |
| May 25 | 75°F | 44°F | 97°F 1936 | 32°F 1975 | 30% | 0% |
| May 26 | 75°F | 44°F | 95°F 2005 | 37°F 1973 | 29% | 0% |
| May 27 | 75°F | 44°F | 99°F 1983 | 34°F 1961 | 29% | 0% |
| May 28 | 75°F | 44°F | 99°F 1983 | 34°F 1929 | 28% | 0% |
| May 29 | 75°F | 45°F | 98°F 1931 | 30°F 1979 | 28% | 0% |
| May 30 | 75°F | 45°F | 103°F 1986 | 34°F 1979 | 27% | 0% |
| May 31 | 76°F | 45°F | 100°F 1986 | 34°F 1984 | 27% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- May 1
- sunrise 6:06 AM, sunset 8:12 PM
- May 31
- sunrise 5:36 AM, sunset 8:42 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00355055 (Lost Creek Dam), public domain. Records: NOAA GHCN-Daily, station USW00024225, 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.