Grafton Weather in May
Average highs run from 61°F on May 1 to 76°F on May 31, and lows from 39°F to 53°F.
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
- 68°F
- Average low
- 46°F
- Record high
- 101°FMay 21, 1964
- Record low
- 5°FMay 3, 1967
- Chance of a freeze
- 61%
- Days of 90°F or more
- 0.6
- Daylight
- 14 h 34 min to 15 h 49 min
- Cloud cover
- 65%
- Humidity
- 63%
- Dew point
- 41°F
- Wind
- 11.6 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| May 1 | 61°F | 39°F | 85°F 1952 | 18°F 1958 | |
| May 2 | 61°F | 40°F | 92°F 1959 | 20°F 1967 | |
| May 3 | 62°F | 40°F | 93°F 1952 | 5°F 1967 | |
| May 4 | 62°F | 41°F | 95°F 1985 | 23°F 2005 | |
| May 5 | 63°F | 41°F | 93°F 2016 | 20°F 2008 | |
| May 6 | 63°F | 42°F | 86°F 1953 | 19°F 1976 | |
| May 7 | 64°F | 42°F | 88°F 1953 | 18°F 1976 | |
| May 8 | 64°F | 42°F | 94°F 1985 | 18°F 1955 | |
| May 9 | 65°F | 43°F | 90°F 1976 | 20°F 1945 | |
| May 10 | 65°F | 43°F | 96°F 1987 | 19°F 1981 | |
| May 11 | 66°F | 44°F | 99°F 2025 | 20°F 1946 | |
| May 12 | 66°F | 44°F | 97°F 2025 | 18°F 1946 | |
| May 13 | 67°F | 45°F | 96°F 2025 | 25°F 1945 | |
| May 14 | 68°F | 45°F | 92°F 2025 | 23°F 2016 | |
| May 15 | 68°F | 46°F | 97°F 1987 | 27°F 1945 | |
| May 16 | 69°F | 46°F | 87°F 1984 | 25°F 1961 | |
| May 17 | 69°F | 47°F | 89°F 1972 | 25°F 2002 | |
| May 18 | 70°F | 47°F | 95°F 1988 | 25°F 2002 | |
| May 19 | 70°F | 48°F | 96°F 1948 | 27°F 2015 | |
| May 20 | 71°F | 48°F | 91°F 1955 | 28°F 1969 | |
| May 21 | 71°F | 49°F | 101°F 1964 | 27°F 2008 | |
| May 22 | 72°F | 49°F | 96°F 1980 | 25°F 1963 | |
| May 23 | 72°F | 49°F | 93°F 1980 | 29°F 2002 | |
| May 24 | 73°F | 50°F | 91°F 1980 | 24°F 2002 | |
| May 25 | 73°F | 50°F | 94°F 2018 | 30°F 2007 | |
| May 26 | 74°F | 51°F | 92°F 2026 | 29°F 1961 | |
| May 27 | 74°F | 51°F | 97°F 1969 | 27°F 1947 | |
| May 28 | 74°F | 52°F | 95°F 2006 | 23°F 1947 | |
| May 29 | 75°F | 52°F | 93°F 1988 | 30°F 1947 | |
| May 30 | 75°F | 52°F | 93°F 2019 | 29°F 1947 | |
| May 31 | 76°F | 53°F | 96°F 1986 | 33°F 1946 |
Chance of rain
Sunrise and sunset
Times for 2026, local time (CDT).
- May 1
- sunrise 6:10 AM, sunset 8:44 PM
- May 31
- sunrise 5:33 AM, sunset 9:22 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00323594 (Grafton), public domain. Records: NOAA GHCN-Daily, station USW00014916, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.