October weather in Helena, MT
The average temperature in Helena in October is 45.5°F (33.5°F–57.6°F). Average precipitation: 0.78 inches. Average snowfall is 2.8 inches.
October is a fall month in Helena, and is cooler than the annual average of 45.5°F. Daily temperatures swing about 24.1°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 10h 38m. For travel, October is cool.
Avg High
57.6°F
Avg Low
33.5°F
Precipitation
0.78 in
Snow
2.8 in
October records in Helena
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 87.1°F (1997) | 15.1°F (1950) | 0.67 in (2022) |
| October 2 | 84.9°F (1992) | 19.0°F (1950) | 0.64 in (1967) |
| October 3 | 84.9°F (1963) | 18.0°F (1999) | 0.48 in (2005) |
| October 4 | 89.1°F (2024) | 24.1°F (1957) | 0.67 in (1992) |
| October 5 | 84.0°F (2021) | 23.0°F (1974) | 0.75 in (2007) |
| October 6 | 84.0°F (1960) | 19.0°F (1974) | 0.22 in (1963) |
| October 7 | 80.1°F (2020) | 19.0°F (1985) | 0.45 in (1997) |
| October 8 | 82.0°F (2020) | 17.1°F (1985) | 0.24 in (1993) |
| October 9 | 84.0°F (1942) | 6.1°F (1985) | 0.30 in (2018) |
| October 10 | 87.1°F (2015) | 9.0°F (2009) | 0.31 in (1962) |
| October 11 | 82.9°F (1995) | 14.0°F (2009) | 0.68 in (1975) |
| October 12 | 81.0°F (1958) | 8.1°F (2009) | 0.60 in (2000) |
| October 13 | 77.0°F (2015) | 19.0°F (1969) | 0.66 in (1975) |
| October 14 | 81.0°F (1958) | 18.0°F (1949) | 0.57 in (1962) |
| October 15 | 82.9°F (1991) | 16.0°F (1969) | 0.45 in (1938) |
| October 16 | 80.1°F (1991) | 12.0°F (1946) | 0.38 in (1988) |
| October 17 | 80.1°F (2003) | 15.1°F (1948) | 0.63 in (2020) |
| October 18 | 82.0°F (1958) | 15.1°F (1949) | 0.28 in (1938) |
| October 19 | 82.0°F (2023) | 15.1°F (1949) | 0.59 in (2009) |
| October 20 | 81.0°F (2023) | 18.0°F (1995) | 0.24 in (1971) |
| October 21 | 82.0°F (2003) | 15.1°F (1981) | 0.63 in (1975) |
| October 22 | 75.0°F (1963) | 10.0°F (1957) | 0.60 in (2022) |
| October 23 | 75.0°F (1939) | 10.0°F (1957) | 0.80 in (1954) |
| October 24 | 72.0°F (1959) | 8.2°F (2020) | 0.43 in (1969) |
| October 25 | 79.0°F (1990) | -3.8°F (2020) | 0.56 in (2023) |
| October 26 | 73.0°F (1960) | -5.8°F (2020) | 0.44 in (1991) |
| October 27 | 75.9°F (2001) | 5.2°F (2023) | 0.30 in (1999) |
| October 28 | 73.0°F (1990) | 3.0°F (1991) | 0.24 in (2013) |
| October 29 | 73.9°F (2021) | -2.0°F (1991) | 0.49 in (1992) |
| October 30 | 72.0°F (1990) | -8.0°F (1991) | 0.52 in (2016) |
| October 31 | 68.0°F (1967) | -2.0°F (1984) | 0.50 in (1973) |