Saint Clair Weather in May
Average highs run from 61°F on May 1 to 72°F on May 31, and lows from 44°F to 54°F. Normal precipitation for the month is 3.53 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
- 67°F
- Average low
- 49°F
- Precipitation
- 3.53 in
- Record high
- 96°FMay 29, 2006
- Record low
- 21°FMay 10, 1941
- Chance of a freeze
- 17%
- Daylight
- 14 h 07 min to 15 h 06 min
- Cloud cover
- 70%
- Humidity
- 75%
- Dew point
- 47°F
- Wind
- 10.7 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 | 61°F | 44°F | 85°F 1942 | 28°F 1945 | 43% | |
| May 2 | 62°F | 44°F | 84°F 2001 | 26°F 1945 | 43% | |
| May 3 | 62°F | 44°F | 89°F 2012 | 29°F 1941 | 43% | |
| May 4 | 62°F | 45°F | 89°F 1949 | 28°F 1978 | 43% | |
| May 5 | 63°F | 45°F | 91°F 1949 | 30°F 1940 | 43% | |
| May 6 | 63°F | 46°F | 91°F 1949 | 30°F 1954 | 43% | |
| May 7 | 64°F | 46°F | 89°F 1949 | 26°F 1947 | 43% | |
| May 8 | 64°F | 46°F | 86°F 1963 | 27°F 1947 | 43% | |
| May 9 | 64°F | 47°F | 88°F 1953 | 29°F 1966 | 43% | |
| May 10 | 65°F | 47°F | 87°F 2004 | 21°F 1941 | 43% | |
| May 11 | 65°F | 47°F | 83°F 1979 | 29°F 1945 | 43% | |
| May 12 | 65°F | 48°F | 86°F 1991 | 29°F 1987 | 42% | |
| May 13 | 66°F | 48°F | 89°F 1991 | 32°F 1946 | 42% | |
| May 14 | 66°F | 48°F | 90°F 1962 | 30°F 1943 | 42% | |
| May 15 | 67°F | 49°F | 93°F 1962 | 36°F 1945 | 42% | |
| May 16 | 67°F | 49°F | 93°F 1962 | 31°F 1967 | 42% | |
| May 17 | 67°F | 49°F | 93°F 1962 | 33°F 1957 | 41% | 0% |
| May 18 | 68°F | 50°F | 92°F 1962 | 31°F 1941 | 41% | 0% |
| May 19 | 68°F | 50°F | 95°F 1998 | 30°F 1935 | 41% | 0% |
| May 20 | 68°F | 50°F | 91°F 1977 | 32°F 2002 | 41% | 0% |
| May 21 | 69°F | 51°F | 92°F 1934 | 32°F 1935 | 40% | 0% |
| May 22 | 69°F | 51°F | 90°F 1964 | 32°F 1978 | 40% | 0% |
| May 23 | 69°F | 51°F | 90°F 1964 | 32°F 1963 | 40% | 0% |
| May 24 | 70°F | 51°F | 89°F 1964 | 32°F 1945 | 40% | 0% |
| May 25 | 70°F | 52°F | 89°F 1975 | 35°F 1949 | 40% | 0% |
| May 26 | 70°F | 52°F | 89°F 2020 | 36°F 1949 | 40% | 0% |
| May 27 | 71°F | 52°F | 90°F 1944 | 34°F 1949 | 39% | 0% |
| May 28 | 71°F | 53°F | 93°F 1987 | 38°F 1989 | 39% | 0% |
| May 29 | 71°F | 53°F | 96°F 2006 | 35°F 1945 | 39% | 0% |
| May 30 | 72°F | 53°F | 95°F 1987 | 37°F 1961 | 39% | 0% |
| May 31 | 72°F | 54°F | 95°F 1988 | 38°F 1948 | 39% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- May 1
- sunrise 6:24 AM, sunset 8:31 PM
- May 31
- sunrise 5:55 AM, sunset 9:01 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00206680 (Port Huron), public domain. Records: NOAA GHCN-Daily, station USC00206680, 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.