Grayson County Weather in September
Average highs run from 75°F on September 1 to 68°F on September 30, and lows from 58°F to 51°F.
September day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 72°F
- Average low
- 55°F
- Record high
- 92°FSep 3, 1925
- Record low
- 21°FSep 24, 1983
- Chance of a freeze
- 0%
- Daylight
- 12 h 57 min to 11 h 51 min
- Cloud cover
- 55%
- Humidity
- 74%
- Dew point
- 55°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 |
|---|---|---|---|---|---|---|
| Sep 1 | 75°F | 58°F | 91°F 1932 | 33°F 1946 | 0% | |
| Sep 2 | 75°F | 58°F | 90°F 1953 | 34°F 1967 | 0% | |
| Sep 3 | 75°F | 58°F | 92°F 1925 | 33°F 1909 | 0% | |
| Sep 4 | 74°F | 58°F | 92°F 1925 | 36°F 1952 | 0% | |
| Sep 5 | 74°F | 58°F | 91°F 1925 | 30°F 1997 | 0% | |
| Sep 6 | 74°F | 58°F | 92°F 1925 | 27°F 1924 | 0% | |
| Sep 7 | 74°F | 57°F | 88°F 1925 | 31°F 1924 | 0% | |
| Sep 8 | 74°F | 57°F | 87°F 1939 | 31°F 2024 | 0% | |
| Sep 9 | 74°F | 57°F | 90°F 1925 | 31°F 2024 | 0% | |
| Sep 10 | 73°F | 57°F | 88°F 1925 | 31°F 2024 | 0% | |
| Sep 11 | 73°F | 57°F | 91°F 1925 | 30°F 1943 | 0% | |
| Sep 12 | 73°F | 56°F | 91°F 1925 | 27°F 1917 | 0% | |
| Sep 13 | 73°F | 56°F | 89°F 1925 | 27°F 1917 | 0% | |
| Sep 14 | 73°F | 56°F | 90°F 1998 | 28°F 1975 | 0% | |
| Sep 15 | 72°F | 56°F | 90°F 1998 | 27°F 1964 | 0% | |
| Sep 16 | 72°F | 55°F | 88°F 1998 | 28°F 1904 | 0% | |
| Sep 17 | 72°F | 55°F | 87°F 2019 | 28°F 1984 | 0% | |
| Sep 18 | 72°F | 55°F | 85°F 1927 | 25°F 1943 | 0% | |
| Sep 19 | 71°F | 55°F | 90°F 1925 | 26°F 1903 | 0% | |
| Sep 20 | 71°F | 54°F | 88°F 1925 | 26°F 1916 | 0% | |
| Sep 21 | 71°F | 54°F | 89°F 1931 | 25°F 1956 | 0% | |
| Sep 22 | 71°F | 54°F | 87°F 1931 | 26°F 1918 | 0% | |
| Sep 23 | 70°F | 53°F | 85°F 1931 | 27°F 1918 | 0% | |
| Sep 24 | 70°F | 53°F | 88°F 1930 | 21°F 1983 | 0% | |
| Sep 25 | 70°F | 53°F | 84°F 2007 | 25°F 1903 | 0% | |
| Sep 26 | 70°F | 52°F | 84°F 1933 | 27°F 1950 | 0% | |
| Sep 27 | 69°F | 52°F | 88°F 1930 | 28°F 1914 | 0% | |
| Sep 28 | 69°F | 52°F | 85°F 1939 | 27°F 1909 | 0% | |
| Sep 29 | 69°F | 51°F | 85°F 1953 | 24°F 1942 | 0% | |
| Sep 30 | 68°F | 51°F | 85°F 1953 | 25°F 1908 | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- September 1
- sunrise 6:56 AM, sunset 7:53 PM
- September 30
- sunrise 7:19 AM, sunset 7:10 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.