Rochester Weather in September
Average highs run from 76°F on September 1 to 66°F on September 30, and lows from 56°F to 45°F. Normal precipitation for the month is 3.60 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
- 72°F
- Average low
- 50°F
- Precipitation
- 3.60 in
- Record high
- 100°FSep 6, 1913
- Record low
- 22°FSep 28, 1893
- Chance of a freeze
- 27%
- Daylight
- 13 h 13 min to 11 h 45 min
- Cloud cover
- 53%
- Humidity
- 73%
- Dew point
- 51°F
- Wind
- 10.3 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 | 76°F | 56°F | 94°F 1937 | 34°F 1909 | 31% | 0% |
| Sep 2 | 76°F | 55°F | 94°F 1929 | 35°F 1909 | 31% | 0% |
| Sep 3 | 76°F | 55°F | 94°F 1937 | 33°F 1974 | 31% | 0% |
| Sep 4 | 75°F | 55°F | 95°F 1893 | 36°F 1974 | 31% | 0% |
| Sep 5 | 75°F | 54°F | 94°F 1913 | 34°F 1918 | 31% | 0% |
| Sep 6 | 75°F | 54°F | 100°F 1913 | 36°F 1932 | 31% | 0% |
| Sep 7 | 75°F | 54°F | 96°F 1913 | 34°F 1934 | 31% | 0% |
| Sep 8 | 75°F | 53°F | 97°F 1931 | 37°F 1995 | 31% | 0% |
| Sep 9 | 74°F | 53°F | 97°F 1955 | 37°F 1969 | 31% | 0% |
| Sep 10 | 74°F | 53°F | 98°F 1931 | 29°F 1917 | 31% | 0% |
| Sep 11 | 74°F | 52°F | 94°F 1931 | 24°F 1917 | 31% | |
| Sep 12 | 73°F | 52°F | 94°F 1948 | 30°F 1955 | 31% | |
| Sep 13 | 73°F | 52°F | 93°F 1908 | 32°F 1953 | 31% | |
| Sep 14 | 73°F | 51°F | 95°F 1939 | 33°F 1929 | 31% | |
| Sep 15 | 72°F | 51°F | 96°F 1939 | 31°F 2011 | 31% | |
| Sep 16 | 72°F | 50°F | 96°F 1939 | 28°F 1937 | 31% | |
| Sep 17 | 72°F | 50°F | 94°F 1955 | 29°F 1916 | 31% | |
| Sep 18 | 71°F | 50°F | 93°F 1955 | 26°F 1929 | 32% | |
| Sep 19 | 71°F | 49°F | 92°F 1908 | 30°F 1929 | 32% | |
| Sep 20 | 71°F | 49°F | 92°F 1908 | 28°F 1991 | 32% | |
| Sep 21 | 70°F | 48°F | 94°F 1908 | 27°F 1918 | 32% | |
| Sep 22 | 70°F | 48°F | 95°F 1908 | 24°F 1974 | 32% | |
| Sep 23 | 69°F | 48°F | 92°F 1937 | 28°F 1989 | 32% | |
| Sep 24 | 69°F | 47°F | 89°F 2017 | 27°F 1942 | 32% | |
| Sep 25 | 68°F | 47°F | 89°F 1956 | 26°F 1893 | 32% | |
| Sep 26 | 68°F | 46°F | 86°F 1908 | 26°F 1893 | 32% | |
| Sep 27 | 68°F | 46°F | 86°F 1943 | 28°F 1942 | 32% | |
| Sep 28 | 67°F | 45°F | 83°F 1952 | 22°F 1893 | 32% | |
| Sep 29 | 67°F | 45°F | 86°F 1953 | 23°F 1967 | 32% | |
| Sep 30 | 66°F | 45°F | 90°F 2023 | 24°F 1939 | 32% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- September 1
- sunrise 6:33 AM, sunset 7:46 PM
- September 30
- sunrise 7:07 AM, sunset 6:52 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00014925 (Rochester Intl AP), public domain. Records: NOAA GHCN-Daily, station USW00014925, 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.