October weather in Castalia, IA
The average temperature in Castalia in October is 48.8°F (37.0°F–60.6°F). Average precipitation: 3.00 inches.
October is a fall month in Castalia, and is warmer than the annual average of 46°F. Daily temperatures swing about 23.6°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 10h 47m. For travel, October is cool.
Avg High
60.6°F
Avg Low
37.0°F
Precipitation
3.00 in
Snow
0.1 in
October records in Castalia
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 90.0°F (2023) | 28.0°F (2003) | 1.42 in (1911) |
| October 2 | 89.1°F (2023) | 21.0°F (2003) | 2.34 in (1927) |
| October 3 | 86.0°F (2023) | 23.0°F (1989) | 1.46 in (1926) |
| October 4 | 89.1°F (2025) | 21.9°F (1935) | 1.45 in (2013) |
| October 5 | 87.1°F (2025) | 25.0°F (1935) | 1.03 in (1998) |
| October 6 | 84.9°F (2007) | 18.0°F (1935) | 2.21 in (1914) |
| October 7 | 87.1°F (2007) | 25.0°F (1989) | 2.54 in (2017) |
| October 8 | 84.0°F (2007) | 21.9°F (1917) | 2.80 in (1997) |
| October 9 | 84.9°F (1938) | 23.0°F (1915) | 0.94 in (1993) |
| October 10 | 89.1°F (1928) | 18.0°F (1925) | 1.30 in (1904) |
| October 11 | 84.0°F (1928) | 21.9°F (1988) | 1.61 in (1901) |
| October 12 | 82.0°F (2010) | 16.0°F (1917) | 2.08 in (1997) |
| October 13 | 82.9°F (2010) | 21.9°F (1909) | 1.66 in (2023) |
| October 14 | 75.0°F (1933) | 21.9°F (1937) | 4.39 in (2012) |
| October 15 | 81.0°F (1935) | 21.0°F (1937) | 1.94 in (1920) |
| October 16 | 82.9°F (1938) | 17.1°F (1915) | 1.01 in (1897) |
| October 17 | 82.0°F (1938) | 19.0°F (2002) | 2.45 in (1898) |
| October 18 | 81.0°F (1910) | 21.0°F (1909) | 0.82 in (2007) |
| October 19 | 78.1°F (2003) | 19.9°F (1930) | 1.54 in (1937) |
| October 20 | 77.0°F (2015) | 16.0°F (1930) | 1.31 in (1943) |
| October 21 | 81.0°F (2003) | 18.0°F (1913) | 0.96 in (1894) |
| October 22 | 82.0°F (2024) | 16.0°F (1930) | 1.40 in (2017) |
| October 23 | 81.0°F (2022) | 18.0°F (1936) | 2.57 in (2020) |
| October 24 | 77.0°F (1989) | 21.0°F (1917) | 0.95 in (2009) |
| October 25 | 81.0°F (1927) | 19.0°F (1926) | 1.14 in (2022) |
| October 26 | 84.0°F (1927) | 16.0°F (1942) | 2.20 in (2016) |
| October 27 | 82.0°F (1927) | 14.0°F (1925) | 1.12 in (1918) |
| October 28 | 73.9°F (1945) | 7.0°F (1925) | 1.44 in (2015) |
| October 29 | 84.0°F (1937) | -2.0°F (1925) | 2.05 in (1896) |
| October 30 | 81.0°F (2024) | -7.1°F (1925) | 1.65 in (1919) |
| October 31 | 79.0°F (1933) | 17.1°F (1913) | 1.78 in (2024) |