Merlin Weather in May
Average highs run from 70°F on May 1 to 77°F on May 31, and lows from 43°F to 48°F. Normal precipitation for the month is 1.39 in over about 9 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
- 74°F
- Average low
- 46°F
- Precipitation
- 1.39 in
- Record high
- 91°FMay 16, 2008
- Record low
- 22°FMay 6, 1965
- Chance of a freeze
- 10%
- Days of 90°F or more
- 2.9
- Daylight
- 14 h 06 min to 15 h 05 min
- Cloud cover
- 58%
- Humidity
- 83%
- Dew point
- 46°F
- Wind
- 3.8 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 | 70°F | 43°F | 78°F 2014 | 25°F 1964 | 34% | 0% |
| May 2 | 70°F | 43°F | 76°F 1966 | 24°F 1964 | 34% | 0% |
| May 3 | 71°F | 43°F | 84°F 1966 | 26°F 1950 | 33% | 0% |
| May 4 | 71°F | 43°F | 85°F 1992 | 26°F 1965 | 33% | 0% |
| May 5 | 71°F | 44°F | 85°F 1992 | 24°F 1964 | 32% | 0% |
| May 6 | 72°F | 44°F | 87°F 1987 | 22°F 1965 | 32% | 0% |
| May 7 | 72°F | 44°F | 87°F 1987 | 25°F 2002 | 32% | 0% |
| May 8 | 72°F | 44°F | 84°F 1987 | 26°F 1999 | 31% | 0% |
| May 9 | 73°F | 45°F | 80°F 1987 | 25°F 1983 | 31% | 0% |
| May 10 | 73°F | 45°F | 84°F 1969 | 27°F 1967 | 31% | 0% |
| May 11 | 73°F | 45°F | 85°F 1969 | 28°F 1966 | 30% | 0% |
| May 12 | 73°F | 45°F | 84°F 1959 | 28°F 1970 | 30% | 0% |
| May 13 | 74°F | 45°F | 85°F 1973 | 26°F 1955 | 30% | 0% |
| May 14 | 74°F | 46°F | 83°F 2014 | 28°F 1966 | 30% | 0% |
| May 15 | 74°F | 46°F | 87°F 2008 | 28°F 1974 | 29% | 0% |
| May 16 | 74°F | 46°F | 91°F 2008 | 27°F 1974 | 29% | 0% |
| May 17 | 75°F | 46°F | 89°F 2008 | 25°F 1974 | 29% | 0% |
| May 18 | 75°F | 46°F | 85°F 2008 | 28°F 1950 | 29% | 0% |
| May 19 | 75°F | 46°F | 84°F 2008 | 29°F 1962 | 29% | 0% |
| May 20 | 75°F | 47°F | 87°F 1963 | 27°F 1960 | 28% | 0% |
| May 21 | 75°F | 47°F | 83°F 2001 | 27°F 1960 | 28% | 0% |
| May 22 | 76°F | 47°F | 88°F 2001 | 28°F 1960 | 28% | 0% |
| May 23 | 76°F | 47°F | 85°F 1983 | 30°F 1960 | 27% | 0% |
| May 24 | 76°F | 47°F | 85°F 1992 | 29°F 1960 | 27% | 0% |
| May 25 | 76°F | 47°F | 84°F 1966 | 30°F 1973 | 27% | 0% |
| May 26 | 76°F | 48°F | 84°F 2005 | 30°F 1953 | 26% | 0% |
| May 27 | 77°F | 48°F | 87°F 1983 | 29°F 1966 | 26% | 0% |
| May 28 | 77°F | 48°F | 89°F 1983 | 29°F 1951 | 25% | 0% |
| May 29 | 77°F | 48°F | 87°F 1984 | 31°F 1951 | 25% | 0% |
| May 30 | 77°F | 48°F | 91°F 1986 | 29°F 1971 | 24% | 0% |
| May 31 | 77°F | 48°F | 89°F 1986 | 27°F 1966 | 24% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- May 1
- sunrise 6:08 AM, sunset 8:14 PM
- May 31
- sunrise 5:39 AM, sunset 8:44 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00353445 (Grants Pass), public domain. Records: NOAA GHCN-Daily, station USW00024235, 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.