October weather in Winthrop Harbor, IL
The average temperature in Winthrop Harbor in October is 51.8°F (42.7°F–60.9°F). Average precipitation: 3.25 inches.
October is a fall month in Winthrop Harbor, and is warmer than the annual average of 48.3°F. Daily temperatures swing about 18.2°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 10h 49m. For travel, October is a comfortable month to visit.
Avg High
60.9°F
Avg Low
42.7°F
Precipitation
3.25 in
Daylight
10h 49m
October records in Winthrop Harbor
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 82.0°F (2000) | 32.0°F (2003) | 1.32 in (2018) |
| October 2 | 82.9°F (2021) | 28.0°F (2003) | 1.57 in (2019) |
| October 3 | 91.9°F (2025) | 36.0°F (2004) | 1.40 in (2014) |
| October 4 | 91.0°F (2025) | 32.0°F (2004) | 0.50 in (2002) |
| October 5 | 86.0°F (2025) | 26.1°F (2004) | 1.07 in (2013) |
| October 6 | 87.1°F (2025) | 30.9°F (2001) | 1.26 in (2018) |
| October 7 | 87.1°F (2007) | 26.1°F (2001) | 1.27 in (2021) |
| October 8 | 86.0°F (2007) | 32.0°F (2000) | 0.36 in (2008) |
| October 9 | 82.9°F (2018) | 30.9°F (2000) | 0.33 in (2009) |
| October 10 | 84.9°F (2010) | 30.2°F (2009) | 0.45 in (2017) |
| October 11 | 84.0°F (2024) | 27.1°F (2009) | 1.33 in (2017) |
| October 12 | 78.1°F (2008) | 29.1°F (2006) | 0.74 in (2001) |
| October 13 | 77.0°F (2000) | 31.1°F (2009) | 2.84 in (2001) |
| October 14 | 75.9°F (2020) | 28.2°F (2006) | 2.01 in (2017) |
| October 15 | 77.0°F (1999) | 31.1°F (2006) | 0.62 in (2009) |
| October 16 | 72.0°F (2016) | 28.9°F (2002) | 0.48 in (2007) |
| October 17 | 81.0°F (2016) | 29.1°F (2015) | 0.47 in (2006) |
| October 18 | 77.0°F (2007) | 26.2°F (2018) | 0.78 in (2025) |
| October 19 | 75.9°F (2000) | 31.1°F (2022) | 0.89 in (2011) |
| October 20 | 82.0°F (2003) | 28.9°F (2002) | 0.38 in (2008) |
| October 21 | 81.0°F (2024) | 25.2°F (2018) | 0.28 in (2006) |
| October 22 | 77.0°F (2022) | 28.2°F (2013) | 1.54 in (2009) |
| October 23 | 75.0°F (2022) | 29.1°F (2013) | 1.43 in (2009) |
| October 24 | 81.0°F (2023) | 25.2°F (2006) | 1.13 in (2021) |
| October 25 | 73.9°F (2012) | 23.2°F (2006) | 0.73 in (2022) |
| October 26 | 73.9°F (2000) | 31.1°F (2019) | 1.87 in (2019) |
| October 27 | 75.0°F (2014) | 28.0°F (2005) | 0.53 in (2015) |
| October 28 | 72.0°F (1999) | 28.0°F (2005) | 0.39 in (2015) |
| October 29 | 82.0°F (2024) | 29.1°F (2008) | 0.73 in (2021) |
| October 30 | 79.0°F (2024) | 23.2°F (2020) | 1.23 in (2018) |
| October 31 | 73.0°F (2024) | 21.2°F (2020) | 0.68 in (2013) |