September weather in McNabb, IL
The average temperature in McNabb in September is 65.8°F (54.5°F–77.1°F). Average precipitation: 3.45 inches.
September is a fall month in McNabb, and is warmer than the annual average of 51.4°F. Daily temperatures swing about 22.6°F between overnight low and afternoon high. Daylight averages about 12h 16m. For travel, September is one of the best months of the year to visit.
Avg High
77.1°F
Avg Low
54.5°F
Precipitation
3.45 in
Daylight
12h 16m
September records in McNabb
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.0°F (2015) | 50.0°F (2023) | 1.49 in (2012) |
| September 2 | 90.0°F (2015) | 43.0°F (2017) | 0.18 in (2020) |
| September 3 | 91.9°F (2015) | 48.9°F (2024) | 0.91 in (2025) |
| September 4 | 93.0°F (2023) | 46.0°F (2025) | 0.47 in (2014) |
| September 5 | 91.0°F (2023) | 54.0°F (2019) | 0.33 in (2018) |
| September 6 | 91.9°F (2015) | 45.0°F (2025) | 1.32 in (2020) |
| September 7 | 91.0°F (2015) | 42.1°F (2025) | 1.16 in (2012) |
| September 8 | 90.0°F (2016) | 41.0°F (2025) | 1.80 in (2016) |
| September 9 | 95.0°F (2013) | 43.0°F (2024) | 0.45 in (2014) |
| September 10 | 95.0°F (2013) | 46.9°F (2024) | 1.10 in (2014) |
| September 11 | 91.9°F (2013) | 46.0°F (2017) | 2.03 in (2022) |
| September 12 | 89.1°F (2019) | 46.0°F (2014) | 1.26 in (2020) |
| September 13 | 88.0°F (2025) | 39.9°F (2014) | 0.60 in (2019) |
| September 14 | 89.1°F (2025) | 37.9°F (2014) | 0.15 in (2012) |
| September 15 | 89.1°F (2025) | 46.9°F (2012) | 1.47 in (2019) |
| September 16 | 88.0°F (2018) | 43.0°F (2014) | 0.21 in (2023) |
| September 17 | 89.1°F (2018) | 42.1°F (2014) | 0.39 in (2023) |
| September 18 | 88.0°F (2018) | 46.0°F (2012) | 0.74 in (2015) |
| September 19 | 91.9°F (2013) | 39.9°F (2012) | 0.61 in (2015) |
| September 20 | 93.0°F (2017) | 39.9°F (2012) | 0.75 in (2019) |
| September 21 | 93.0°F (2022) | 42.1°F (2020) | 0.60 in (2021) |
| September 22 | 93.0°F (2017) | 43.0°F (2013) | 2.20 in (2019) |
| September 23 | 93.9°F (2017) | 37.0°F (2012) | 0.08 in (2019) |
| September 24 | 90.0°F (2017) | 35.1°F (2012) | 0.45 in (2024) |
| September 25 | 93.0°F (2017) | 48.0°F (2021) | 0.85 in (2018) |
| September 26 | 91.0°F (2017) | 46.9°F (2018) | 0.02 in (2023) |
| September 27 | 87.1°F (2021) | 39.0°F (2022) | 1.04 in (2019) |
| September 28 | 87.1°F (2021) | 37.9°F (2022) | 1.40 in (2019) |
| September 29 | 88.0°F (2025) | 36.0°F (2022) | 0.39 in (2019) |
| September 30 | 87.1°F (2021) | 39.9°F (2022) | 0.20 in (2019) |