September weather in Dunkirk, NY
The average temperature in Dunkirk in September is 62.8°F (52.5°F–73.0°F). Average precipitation: 4.37 inches.
September is a fall month in Dunkirk, and is warmer than the annual average of 48.4°F. Daily temperatures swing about 20.5°F between overnight low and afternoon high. Daylight averages about 12h 16m. For travel, September is a comfortable month to visit.
Avg High
73.0°F
Avg Low
52.5°F
Precipitation
4.37 in
Daylight
12h 16m
September records in Dunkirk
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 81.0°F (2015) | 45.0°F (2017) | 0.33 in (2016) |
| September 2 | 89.1°F (2018) | 43.0°F (2017) | 0.99 in (2019) |
| September 3 | 87.1°F (2018) | 43.0°F (2017) | 0.51 in (2017) |
| September 4 | 87.1°F (2018) | 46.0°F (2024) | 0.40 in (2019) |
| September 5 | 88.0°F (2018) | 51.1°F (2025) | 0.93 in (2017) |
| September 6 | 91.9°F (2018) | 51.1°F (2019) | 0.33 in (2020) |
| September 7 | 90.0°F (2023) | 48.0°F (2017) | 1.67 in (2024) |
| September 8 | 87.1°F (2015) | 46.0°F (2025) | 1.62 in (2017) |
| September 9 | 90.0°F (2015) | 46.0°F (2025) | 0.87 in (2016) |
| September 10 | 84.0°F (2016) | 42.1°F (2017) | 2.01 in (2018) |
| September 11 | 90.0°F (2016) | 45.0°F (2017) | 1.57 in (2016) |
| September 12 | 82.9°F (2019) | 44.1°F (2020) | 1.08 in (2015) |
| September 13 | 80.1°F (2020) | 45.0°F (2020) | 1.92 in (2015) |
| September 14 | 82.9°F (2018) | 51.1°F (2023) | 0.71 in (2022) |
| September 15 | 84.9°F (2021) | 42.1°F (2020) | 0.50 in (2021) |
| September 16 | 84.0°F (2024) | 42.1°F (2020) | 0.60 in (2021) |
| September 17 | 84.0°F (2018) | 45.0°F (2023) | 0.00 in (2015) |
| September 18 | 82.9°F (2021) | 48.0°F (2019) | 1.93 in (2016) |
| September 19 | 84.0°F (2015) | 36.0°F (2020) | 0.17 in (2015) |
| September 20 | 82.9°F (2016) | 36.0°F (2020) | 0.54 in (2022) |
| September 21 | 84.9°F (2021) | 39.9°F (2020) | 0.00 in (2015) |
| September 22 | 90.0°F (2018) | 45.0°F (2015) | 0.41 in (2018) |
| September 23 | 87.1°F (2019) | 44.1°F (2018) | 0.52 in (2021) |
| September 24 | 86.0°F (2017) | 45.0°F (2022) | 0.23 in (2019) |
| September 25 | 86.0°F (2017) | 42.1°F (2016) | 0.48 in (2025) |
| September 26 | 89.1°F (2017) | 46.9°F (2021) | 0.74 in (2024) |
| September 27 | 88.0°F (2017) | 48.9°F (2018) | 1.80 in (2022) |
| September 28 | 86.0°F (2017) | 50.0°F (2018) | 0.04 in (2022) |
| September 29 | 81.0°F (2020) | 45.0°F (2021) | 0.21 in (2020) |
| September 30 | 75.9°F (2025) | 35.1°F (2022) | 1.27 in (2015) |