October weather in Lemont, IL
The average temperature in Lemont in October is 53.9°F (42.5°F–65.2°F). Average precipitation: 3.68 inches.
October is a fall month in Lemont, and is warmer than the annual average of 51.4°F. Daily temperatures swing about 22.7°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 10h 51m. For travel, October is a comfortable month to visit.
Avg High
65.2°F
Avg Low
42.5°F
Precipitation
3.68 in
Daylight
10h 51m
October records in Lemont
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 89.1°F (2019) | 44.1°F (2014) | 0.62 in (1998) |
| October 2 | 79.0°F (2014) | 42.1°F (2020) | 1.15 in (2016) |
| October 3 | 78.1°F (2017) | 41.0°F (2020) | 3.48 in (2014) |
| October 4 | 88.0°F (2018) | 35.1°F (2014) | 1.20 in (2013) |
| October 5 | 78.1°F (2016) | 35.1°F (2014) | 1.54 in (2001) |
| October 6 | 82.9°F (2016) | 34.0°F (2020) | 1.12 in (1995) |
| October 7 | 77.0°F (2020) | 48.0°F (2020) | 1.80 in (2025) |
| October 8 | 81.0°F (2015) | 39.9°F (2016) | 1.26 in (2008) |
| October 9 | 86.0°F (2018) | 42.1°F (2016) | 0.83 in (1993) |
| October 10 | 88.0°F (2018) | 37.0°F (2014) | 0.30 in (2009) |
| October 11 | 89.1°F (2020) | 39.9°F (2014) | 1.61 in (2017) |
| October 12 | 82.0°F (2020) | 32.0°F (2018) | 1.27 in (2021) |
| October 13 | 77.0°F (2015) | 32.0°F (2019) | 0.49 in (2016) |
| October 14 | 77.0°F (2017) | 35.1°F (2018) | 2.03 in (2001) |
| October 15 | 69.1°F (2016) | 36.0°F (2018) | 4.20 in (2017) |
| October 16 | 72.0°F (2016) | 32.0°F (2018) | 0.35 in (1993) |
| October 17 | 73.9°F (2016) | 32.0°F (2015) | 1.20 in (2006) |
| October 18 | 80.1°F (2016) | 30.0°F (2015) | 1.72 in (1998) |
| October 19 | 80.1°F (2016) | 21.9°F (2015) | 1.10 in (2025) |
| October 20 | 73.9°F (2016) | 30.0°F (2015) | 1.20 in (1995) |
| October 21 | 80.1°F (2017) | 32.0°F (2018) | 0.65 in (2020) |
| October 22 | 79.0°F (2017) | 26.1°F (2018) | 1.74 in (2020) |
| October 23 | 78.1°F (2020) | 34.0°F (2016) | 2.46 in (2009) |
| October 24 | 72.0°F (2016) | 32.0°F (2018) | 0.58 in (2017) |
| October 25 | 68.0°F (2014) | 30.9°F (2020) | 3.25 in (2021) |
| October 26 | 72.0°F (2014) | 30.9°F (2020) | 0.90 in (2022) |
| October 27 | 72.0°F (2014) | 32.0°F (2020) | 2.82 in (2019) |
| October 28 | 80.1°F (2014) | 28.0°F (2020) | 0.62 in (2015) |
| October 29 | 66.0°F (2016) | 28.9°F (2017) | 0.50 in (2021) |
| October 30 | 75.0°F (2016) | 28.0°F (2020) | 1.62 in (2009) |
| October 31 | 63.0°F (2015) | 30.0°F (2020) | 3.44 in (2013) |