Union Weather in September
Average highs run from 82°F on September 1 to 71°F on September 30, and lows from 64°F to 53°F. Normal precipitation for the month is 4.25 in over about 9 wet days.
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
- 77°F
- Average low
- 59°F
- Precipitation
- 4.25 in
- Record high
- 105°FSep 2, 1953
- Record low
- 34°FSep 22, 1904
- Chance of a freeze
- 0%
- Days of 90°F or more
- 1.9
- Daylight
- 13 h 05 min to 11 h 48 min
- Cloud cover
- 55%
- Humidity
- 74%
- Dew point
- 57°F
- Wind
- 6.0 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 | 82°F | 64°F | 98°F 2010 | 48°F 1869 | 27% | 0% |
| Sep 2 | 82°F | 64°F | 105°F 1953 | 48°F 1896 | 27% | 0% |
| Sep 3 | 81°F | 64°F | 100°F 1993 | 44°F 1862 | 27% | 0% |
| Sep 4 | 81°F | 63°F | 95°F 1964 | 46°F 1883 | 27% | 0% |
| Sep 5 | 81°F | 63°F | 95°F 2023 | 49°F 1862 | 27% | 0% |
| Sep 6 | 81°F | 63°F | 99°F 1881 | 44°F 1902 | 27% | 0% |
| Sep 7 | 80°F | 63°F | 101°F 1881 | 47°F 1883 | 27% | 0% |
| Sep 8 | 80°F | 62°F | 98°F 2015 | 45°F 1848 | 27% | 0% |
| Sep 9 | 80°F | 62°F | 94°F 1854 | 47°F 1901 | 27% | 0% |
| Sep 10 | 79°F | 62°F | 98°F 1983 | 41°F 1883 | 27% | 0% |
| Sep 11 | 79°F | 61°F | 99°F 1983 | 45°F 1917 | 28% | 0% |
| Sep 12 | 79°F | 61°F | 95°F 1895 | 45°F 1853 | 28% | 0% |
| Sep 13 | 78°F | 61°F | 94°F 1952 | 44°F 1845 | 28% | 0% |
| Sep 14 | 78°F | 60°F | 94°F 2016 | 40°F 1911 | 28% | 0% |
| Sep 15 | 78°F | 60°F | 94°F 1993 | 42°F 1859 | 28% | 0% |
| Sep 16 | 77°F | 59°F | 95°F 1991 | 40°F 1851 | 28% | 0% |
| Sep 17 | 77°F | 59°F | 95°F 1991 | 37°F 1848 | 28% | 0% |
| Sep 18 | 76°F | 59°F | 90°F 1914 | 41°F 1868 | 29% | 0% |
| Sep 19 | 76°F | 58°F | 93°F 1983 | 43°F 1855 | 29% | 0% |
| Sep 20 | 76°F | 58°F | 92°F 1983 | 40°F 1855 | 29% | 0% |
| Sep 21 | 75°F | 57°F | 98°F 1895 | 39°F 1854 | 29% | 0% |
| Sep 22 | 75°F | 57°F | 96°F 1895 | 34°F 1904 | 30% | 0% |
| Sep 23 | 74°F | 56°F | 97°F 1895 | 34°F 1904 | 30% | 0% |
| Sep 24 | 74°F | 56°F | 92°F 1959 | 40°F 1863 | 30% | 0% |
| Sep 25 | 74°F | 56°F | 91°F 1970 | 38°F 1851 | 31% | 0% |
| Sep 26 | 73°F | 55°F | 92°F 1881 | 39°F 1858 | 31% | 0% |
| Sep 27 | 73°F | 55°F | 91°F 1998 | 35°F 1947 | 31% | 0% |
| Sep 28 | 72°F | 54°F | 89°F 2025 | 35°F 1848 | 31% | 0% |
| Sep 29 | 72°F | 54°F | 89°F 1945 | 39°F 1860 | 31% | 0% |
| Sep 30 | 71°F | 53°F | 89°F 1986 | 38°F 1854 | 31% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- September 1
- sunrise 6:24 AM, sunset 7:29 PM
- September 30
- sunrise 6:53 AM, sunset 6:41 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00282023 (Cranford), public domain. Records: NOAA GHCN-Daily, station USW00014734, 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.