Grayson County Weather in May
Average highs run from 66°F on May 1 to 73°F on May 31, and lows from 47°F to 56°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
- 69°F
- Average low
- 52°F
- Record high
- 92°FMay 24, 1901
- Record low
- 19°FMay 5, 1986
- Chance of a freeze
- 13%
- Daylight
- 13 h 42 min to 14 h 30 min
- Cloud cover
- 63%
- Humidity
- 79%
- Dew point
- 53°F
- Wind
- 4.5 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 | 66°F | 47°F | 85°F 1942 | 24°F 1971 | 0% | |
| May 2 | 66°F | 47°F | 88°F 1936 | 23°F 1943 | 0% | |
| May 3 | 66°F | 47°F | 83°F 1942 | 23°F 1981 | 0% | |
| May 4 | 67°F | 48°F | 84°F 1928 | 21°F 1939 | 0% | |
| May 5 | 67°F | 48°F | 85°F 1949 | 19°F 1986 | 0% | |
| May 6 | 67°F | 48°F | 84°F 1949 | 22°F 1910 | 0% | |
| May 7 | 67°F | 49°F | 84°F 1930 | 23°F 1970 | 0% | |
| May 8 | 68°F | 49°F | 83°F 1940 | 21°F 1925 | 0% | |
| May 9 | 68°F | 49°F | 83°F 1936 | 22°F 1947 | 0% | |
| May 10 | 68°F | 50°F | 85°F 1905 | 20°F 1947 | 0% | |
| May 11 | 68°F | 50°F | 82°F 1896 | 21°F 1947 | 0% | |
| May 12 | 69°F | 51°F | 81°F 1896 | 24°F 1913 | 0% | |
| May 13 | 69°F | 51°F | 81°F 1962 | 27°F 1910 | 0% | |
| May 14 | 69°F | 51°F | 81°F 1962 | 25°F 1941 | 0% | |
| May 15 | 69°F | 52°F | 84°F 1908 | 19°F 1910 | 0% | |
| May 16 | 69°F | 52°F | 83°F 1900 | 28°F 1920 | 0% | |
| May 17 | 70°F | 52°F | 84°F 1900 | 28°F 1921 | 0% | |
| May 18 | 70°F | 52°F | 85°F 1940 | 28°F 1973 | 0% | |
| May 19 | 70°F | 53°F | 88°F 1934 | 25°F 1910 | 0% | |
| May 20 | 70°F | 53°F | 85°F 1934 | 24°F 2002 | 0% | |
| May 21 | 71°F | 53°F | 88°F 1941 | 26°F 2002 | 0% | |
| May 22 | 71°F | 54°F | 81°F 1902 | 23°F 2002 | 0% | |
| May 23 | 71°F | 54°F | 89°F 1908 | 27°F 2002 | 0% | |
| May 24 | 71°F | 54°F | 92°F 1901 | 28°F 1963 | 0% | |
| May 25 | 72°F | 55°F | 82°F 1975 | 30°F 1925 | 0% | |
| May 26 | 72°F | 55°F | 83°F 1896 | 24°F 1925 | 0% | |
| May 27 | 72°F | 55°F | 82°F 1911 | 21°F 1925 | 0% | |
| May 28 | 72°F | 55°F | 84°F 1931 | 27°F 1994 | 0% | |
| May 29 | 72°F | 56°F | 86°F 1931 | 27°F 1949 | 0% | |
| May 30 | 73°F | 56°F | 85°F 1931 | 30°F 1902 | 0% | |
| May 31 | 73°F | 56°F | 85°F 1937 | 28°F 1947 | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- May 1
- sunrise 6:31 AM, sunset 8:13 PM
- May 31
- sunrise 6:08 AM, sunset 8:38 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00442730 (Elk Creek 4SSW), public domain. Records: NOAA GHCN-Daily, station USC00441209, 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.