October weather in Westby, MT
The average temperature in Westby in October is 41.0°F (28.6°F–53.5°F). Average precipitation: 0.97 inches.
October is a fall month in Westby, and is warmer than the annual average of 39.1°F. Daily temperatures swing about 24.9°F between overnight low and afternoon high. Daylight averages about 10h 31m. For travel, October is cool.
Avg High
53.5°F
Avg Low
28.6°F
Precipitation
0.97 in
Daylight
10h 31m
October records in Westby
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 91.9°F (1992) | 12.0°F (1944) | 0.60 in (2009) |
| October 2 | 84.9°F (1943) | 14.0°F (1989) | 0.84 in (2018) |
| October 3 | 88.0°F (1943) | 12.9°F (1989) | 1.16 in (1994) |
| October 4 | 89.1°F (1943) | 15.1°F (2018) | 0.76 in (2023) |
| October 5 | 84.9°F (1987) | 14.0°F (2000) | 1.41 in (1937) |
| October 6 | 84.9°F (1987) | 12.9°F (1974) | 1.10 in (1967) |
| October 7 | 89.1°F (2021) | 12.9°F (2000) | 0.52 in (1959) |
| October 8 | 84.0°F (1980) | 12.9°F (2000) | 0.65 in (1946) |
| October 9 | 86.0°F (1955) | 8.1°F (1959) | 0.40 in (1946) |
| October 10 | 87.1°F (1942) | 9.0°F (1959) | 0.54 in (2005) |
| October 11 | 82.9°F (2015) | 16.0°F (2018) | 0.45 in (1998) |
| October 12 | 78.1°F (1958) | 19.0°F (1959) | 1.03 in (1994) |
| October 13 | 81.0°F (1988) | 18.0°F (1937) | 0.26 in (1946) |
| October 14 | 82.0°F (1964) | 16.0°F (2017) | 0.93 in (1975) |
| October 15 | 82.9°F (1953) | 12.9°F (1992) | 0.65 in (1962) |
| October 16 | 82.9°F (1961) | 12.0°F (1989) | 0.23 in (2025) |
| October 17 | 77.0°F (1963) | 8.1°F (1948) | 0.62 in (2025) |
| October 18 | 79.0°F (1953) | 6.1°F (1972) | 1.37 in (1971) |
| October 19 | 79.0°F (1947) | 1.9°F (1960) | 0.21 in (1971) |
| October 20 | 82.0°F (2003) | 14.0°F (1949) | 0.65 in (1958) |
| October 21 | 80.1°F (1940) | 10.9°F (1976) | 0.97 in (1953) |
| October 22 | 78.1°F (2003) | 5.0°F (2020) | 1.08 in (1953) |
| October 23 | 73.0°F (1937) | -0.9°F (2020) | 0.35 in (2010) |
| October 24 | 78.1°F (1948) | -6.0°F (2020) | 0.35 in (2010) |
| October 25 | 75.0°F (1999) | 3.0°F (2020) | 0.44 in (1954) |
| October 26 | 75.0°F (1990) | -2.9°F (2020) | 1.38 in (1989) |
| October 27 | 77.0°F (1944) | -5.1°F (2020) | 0.30 in (1946) |
| October 28 | 79.0°F (1937) | 3.9°F (1984) | 0.65 in (1940) |
| October 29 | 75.9°F (1937) | 3.9°F (1991) | 0.40 in (1970) |
| October 30 | 81.0°F (1950) | -5.1°F (1991) | 0.50 in (1949) |
| October 31 | 72.0°F (1944) | -5.1°F (1991) | 0.21 in (2000) |