October weather in Decatur, IN
The average temperature in Decatur in October is 53.1°F (42.1°F–64.0°F). Average precipitation: 2.91 inches.
October is a fall month in Decatur, and is warmer than the annual average of 50.7°F. Daily temperatures swing about 21.9°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 10h 53m. For travel, October is a comfortable month to visit.
Avg High
64.0°F
Avg Low
42.1°F
Precipitation
2.91 in
Daylight
10h 53m
October records in Decatur
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 88.0°F (2019) | 33.1°F (2009) | 0.76 in (1945) |
| October 2 | 89.1°F (2019) | 33.1°F (2009) | 1.10 in (2009) |
| October 3 | 84.9°F (2005) | 35.1°F (2020) | 1.70 in (1944) |
| October 4 | 88.0°F (2023) | 33.1°F (2022) | 1.78 in (1954) |
| October 5 | 89.1°F (2025) | 34.0°F (2008) | 1.56 in (1941) |
| October 6 | 88.0°F (2007) | 35.1°F (2009) | 1.41 in (2001) |
| October 7 | 88.0°F (2007) | 35.1°F (2006) | 1.75 in (1941) |
| October 8 | 90.0°F (2007) | 28.9°F (2012) | 0.83 in (1984) |
| October 9 | 90.0°F (2007) | 30.0°F (2012) | 3.96 in (1950) |
| October 10 | 86.0°F (2018) | 35.1°F (2025) | 1.79 in (1990) |
| October 11 | 86.0°F (2010) | 32.0°F (2012) | 1.11 in (1959) |
| October 12 | 84.0°F (2008) | 32.0°F (2012) | 2.60 in (1949) |
| October 13 | 84.9°F (2008) | 32.0°F (2006) | 1.10 in (1969) |
| October 14 | 82.0°F (2008) | 33.1°F (2006) | 0.81 in (2023) |
| October 15 | 81.0°F (2021) | 28.0°F (2006) | 1.68 in (1985) |
| October 16 | 79.0°F (2007) | 28.0°F (2006) | 1.72 in (1992) |
| October 17 | 72.0°F (2016) | 28.9°F (2009) | 1.80 in (2006) |
| October 18 | 81.0°F (2016) | 26.1°F (2009) | 2.48 in (1946) |
| October 19 | 82.9°F (2025) | 27.0°F (2009) | 1.30 in (1947) |
| October 20 | 72.0°F (2017) | 30.9°F (2010) | 2.20 in (2011) |
| October 21 | 77.0°F (2017) | 33.1°F (2022) | 3.05 in (2020) |
| October 22 | 79.0°F (2007) | 28.9°F (2010) | 1.22 in (1971) |
| October 23 | 79.0°F (2020) | 28.0°F (2008) | 1.12 in (2007) |
| October 24 | 81.0°F (2023) | 30.0°F (2008) | 1.52 in (1957) |
| October 25 | 79.0°F (2012) | 26.1°F (2006) | 2.16 in (2021) |
| October 26 | 77.0°F (2012) | 26.1°F (2006) | 3.37 in (1991) |
| October 27 | 77.0°F (2023) | 28.9°F (2017) | 1.38 in (2019) |
| October 28 | 77.0°F (2014) | 28.0°F (2013) | 1.21 in (2015) |
| October 29 | 68.0°F (2014) | 26.1°F (2005) | 0.61 in (2018) |
| October 30 | 79.0°F (2024) | 25.0°F (2008) | 0.64 in (1973) |
| October 31 | 78.1°F (2024) | 25.0°F (2008) | 0.56 in (2019) |