Mill Creek Weather in September
Average highs run from 73°F on September 1 to 65°F on September 30, and lows from 51°F to 44°F. Normal precipitation for the month is 4.02 in.
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
- 69°F
- Average low
- 48°F
- Precipitation
- 4.02 in
- Record high
- 97°FSep 3, 1953
- Record low
- 26°FSep 29, 1942
- Chance of a freeze
- 30%
- Daylight
- 13 h 01 min to 11 h 49 min
- Cloud cover
- 58%
- Humidity
- 73%
- Dew point
- 51°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 | 73°F | 51°F | 94°F 1932 | 38°F 1946 | 0% | |
| Sep 2 | 72°F | 51°F | 93°F 1953 | 38°F 1987 | 0% | |
| Sep 3 | 72°F | 51°F | 97°F 1953 | 39°F 1934 | 0% | |
| Sep 4 | 72°F | 51°F | 91°F 1953 | 36°F 1997 | 0% | |
| Sep 5 | 72°F | 50°F | 92°F 1954 | 37°F 1997 | 0% | |
| Sep 6 | 72°F | 50°F | 89°F 1954 | 38°F 1950 | 0% | |
| Sep 7 | 71°F | 50°F | 89°F 1954 | 38°F 1976 | 0% | |
| Sep 8 | 71°F | 50°F | 91°F 1939 | 36°F 1932 | 0% | |
| Sep 9 | 71°F | 50°F | 91°F 1941 | 35°F 2024 | 0% | |
| Sep 10 | 71°F | 49°F | 90°F 1964 | 36°F 1956 | 0% | |
| Sep 11 | 70°F | 49°F | 91°F 2019 | 36°F 1949 | 0% | |
| Sep 12 | 70°F | 49°F | 92°F 1952 | 36°F 1940 | 0% | |
| Sep 13 | 70°F | 49°F | 92°F 1952 | 33°F 1985 | 0% | |
| Sep 14 | 70°F | 48°F | 89°F 1998 | 31°F 1953 | 0% | |
| Sep 15 | 69°F | 48°F | 90°F 1939 | 31°F 1964 | 0% | |
| Sep 16 | 69°F | 48°F | 89°F 1936 | 35°F 1946 | 0% | |
| Sep 17 | 69°F | 47°F | 86°F 1931 | 34°F 1985 | 0% | |
| Sep 18 | 69°F | 47°F | 87°F 1927 | 33°F 1937 | 0% | |
| Sep 19 | 68°F | 47°F | 89°F 1965 | 31°F 1959 | 0% | |
| Sep 20 | 68°F | 47°F | 88°F 2025 | 31°F 1956 | 0% | |
| Sep 21 | 68°F | 46°F | 88°F 1931 | 29°F 1956 | 0% | |
| Sep 22 | 67°F | 46°F | 88°F 2016 | 30°F 1999 | 0% | |
| Sep 23 | 67°F | 46°F | 87°F 1930 | 29°F 1974 | 0% | |
| Sep 24 | 67°F | 45°F | 90°F 1930 | 27°F 1963 | 0% | |
| Sep 25 | 67°F | 45°F | 86°F 1933 | 27°F 1963 | 0% | |
| Sep 26 | 66°F | 45°F | 88°F 2017 | 30°F 1950 | 0% | |
| Sep 27 | 66°F | 45°F | 85°F 1946 | 30°F 1991 | 0% | |
| Sep 28 | 66°F | 44°F | 85°F 1945 | 27°F 1957 | 0% | |
| Sep 29 | 65°F | 44°F | 90°F 1953 | 26°F 1942 | 0% | |
| Sep 30 | 65°F | 44°F | 90°F 1953 | 28°F 1947 | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- September 1
- sunrise 6:49 AM, sunset 7:50 PM
- September 30
- sunrise 7:15 AM, sunset 7:04 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00464971 (Kumbrabow), public domain. Records: NOAA GHCN-Daily, station USW00013729, 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.