Quincy Weather in September
Average highs run from 86°F on September 1 to 78°F on September 30, and lows from 42°F to 37°F. Normal precipitation for the month is 0.42 in over about 2 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
- 82°F
- Average low
- 40°F
- Precipitation
- 0.42 in
- Record high
- 106°FSep 4, 2024
- Record low
- 15°FSep 19, 1965
- Chance of a freeze
- 66%
- Days of 90°F or more
- 9.0
- Daylight
- 13 h 03 min to 11 h 48 min
- Cloud cover
- 26%
- Humidity
- 35%
- Dew point
- 31°F
- Wind
- 4.7 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 | 86°F | 42°F | 97°F 2024 | 31°F 1960 | 4% | 0% |
| Sep 2 | 86°F | 42°F | 97°F 1988 | 28°F 1964 | 4% | 0% |
| Sep 3 | 86°F | 42°F | 98°F 1988 | 29°F 1964 | 4% | 0% |
| Sep 4 | 85°F | 42°F | 106°F 2024 | 25°F 1978 | 4% | 0% |
| Sep 5 | 85°F | 42°F | 104°F 2024 | 27°F 1965 | 4% | 0% |
| Sep 6 | 85°F | 42°F | 104°F 2024 | 32°F 1960 | 4% | 0% |
| Sep 7 | 85°F | 42°F | 100°F 2022 | 29°F 1961 | 5% | 0% |
| Sep 8 | 85°F | 41°F | 97°F 2022 | 29°F 1964 | 5% | 0% |
| Sep 9 | 84°F | 41°F | 97°F 2024 | 28°F 1964 | 5% | 0% |
| Sep 10 | 84°F | 41°F | 99°F 2024 | 28°F 1964 | 5% | 0% |
| Sep 11 | 84°F | 41°F | 95°F 2024 | 27°F 1985 | 5% | 0% |
| Sep 12 | 84°F | 41°F | 93°F 1971 | 30°F 1965 | 5% | 0% |
| Sep 13 | 83°F | 41°F | 95°F 1971 | 31°F 1960 | 6% | 0% |
| Sep 14 | 83°F | 40°F | 93°F 1971 | 22°F 1970 | 6% | 0% |
| Sep 15 | 83°F | 40°F | 92°F 1981 | 27°F 1970 | 6% | 0% |
| Sep 16 | 83°F | 40°F | 91°F 2008 | 26°F 1959 | 6% | 0% |
| Sep 17 | 82°F | 40°F | 89°F 1962 | 21°F 1965 | 6% | 0% |
| Sep 18 | 82°F | 40°F | 91°F 1974 | 25°F 1978 | 7% | 0% |
| Sep 19 | 82°F | 39°F | 90°F 1974 | 15°F 1965 | 7% | 0% |
| Sep 20 | 81°F | 39°F | 91°F 1960 | 20°F 1978 | 7% | 0% |
| Sep 21 | 81°F | 39°F | 90°F 1974 | 25°F 1968 | 7% | 0% |
| Sep 22 | 81°F | 39°F | 95°F 2024 | 26°F 1961 | 8% | 0% |
| Sep 23 | 80°F | 38°F | 98°F 2024 | 24°F 1972 | 8% | 0% |
| Sep 24 | 80°F | 38°F | 94°F 2024 | 21°F 1958 | 8% | 0% |
| Sep 25 | 80°F | 38°F | 92°F 2003 | 25°F 1961 | 9% | 0% |
| Sep 26 | 79°F | 38°F | 93°F 2009 | 29°F 1961 | 9% | 0% |
| Sep 27 | 79°F | 37°F | 94°F 2009 | 27°F 1970 | 9% | 0% |
| Sep 28 | 79°F | 37°F | 91°F 2009 | 23°F 1959 | 9% | 0% |
| Sep 29 | 78°F | 37°F | 88°F 2008 | 25°F 1961 | 10% | 0% |
| Sep 30 | 78°F | 37°F | 93°F 2024 | 23°F 1961 | 10% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:32 AM, sunset 7:35 PM
- September 30
- sunrise 6:59 AM, sunset 6:47 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00047195 (Quincy), public domain. Records: NOAA GHCN-Daily, station USC00041700, 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.