October weather in St. Marys, IA
The average temperature in St. Marys in October is 52.5°F (40.1°F–64.8°F). Average precipitation: 3.02 inches. Average snowfall is 0.5 inches.
October is a fall month in St. Marys, and is warmer than the annual average of 49.9°F. Daily temperatures swing about 24.7°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 10h 52m. For travel, October is a comfortable month to visit.
Avg High
64.8°F
Avg Low
40.1°F
Precipitation
3.02 in
Snow
0.5 in
October records in St. Marys
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 91.9°F (1976) | 25.0°F (1985) | 1.31 in (1927) |
| October 2 | 95.0°F (1953) | 21.0°F (1974) | 2.65 in (2019) |
| October 3 | 90.0°F (1897) | 25.0°F (2003) | 1.94 in (1925) |
| October 4 | 93.9°F (1938) | 25.0°F (1968) | 1.45 in (1941) |
| October 5 | 93.9°F (1963) | 28.0°F (1980) | 1.81 in (1954) |
| October 6 | 93.0°F (1947) | 21.9°F (1952) | 1.87 in (1931) |
| October 7 | 95.0°F (1939) | 19.9°F (2012) | 1.48 in (1914) |
| October 8 | 91.0°F (1938) | 23.0°F (1976) | 1.06 in (1970) |
| October 9 | 88.0°F (1938) | 21.9°F (2000) | 1.88 in (1970) |
| October 10 | 88.0°F (1928) | 21.9°F (2000) | 1.50 in (1961) |
| October 11 | 84.9°F (1928) | 21.9°F (1967) | 3.95 in (1973) |
| October 12 | 90.0°F (1975) | 24.1°F (1917) | 1.14 in (2021) |
| October 13 | 90.0°F (1975) | 19.9°F (1909) | 1.85 in (1997) |
| October 14 | 88.0°F (1897) | 19.9°F (1937) | 2.20 in (2007) |
| October 15 | 90.0°F (1938) | 27.0°F (1952) | 1.23 in (1984) |
| October 16 | 88.0°F (1950) | 23.0°F (1943) | 2.69 in (1933) |
| October 17 | 88.0°F (1947) | 17.1°F (1976) | 2.41 in (1935) |
| October 18 | 89.1°F (1950) | 17.1°F (1976) | 1.67 in (1946) |
| October 19 | 82.9°F (1924) | 16.0°F (1972) | 1.18 in (1985) |
| October 20 | 90.0°F (1947) | 18.0°F (1952) | 1.12 in (1936) |
| October 21 | 89.1°F (1947) | 17.1°F (1930) | 1.17 in (1908) |
| October 22 | 87.1°F (1899) | 16.0°F (1976) | 2.77 in (1979) |
| October 23 | 84.9°F (1899) | 14.0°F (1981) | 1.75 in (2020) |
| October 24 | 84.9°F (1927) | 16.0°F (1981) | 1.57 in (1977) |
| October 25 | 88.0°F (1940) | 19.9°F (1968) | 2.41 in (2021) |
| October 26 | 87.1°F (1940) | 15.1°F (1942) | 0.73 in (1997) |
| October 27 | 84.0°F (1922) | 17.1°F (1997) | 2.00 in (1918) |
| October 28 | 84.0°F (1927) | 5.0°F (1925) | 1.17 in (2021) |
| October 29 | 91.0°F (1937) | 9.0°F (1925) | 2.30 in (1896) |
| October 30 | 88.0°F (1950) | 3.9°F (1925) | 1.01 in (1942) |
| October 31 | 88.0°F (1950) | 18.0°F (1923) | 2.43 in (1900) |