October weather in Index, WA
The average temperature in Index in October is 49.9°F (41.5°F–58.3°F). Average precipitation: 12.30 inches.
October is a fall month in Index, and is warmer than the annual average of 49.8°F. Daily temperatures swing about 16.8°F between overnight low and afternoon high. Expect about 17 days with precipitation. Daylight averages about 10h 34m. For travel, October is a wet month.
Avg High
58.3°F
Avg Low
41.5°F
Precipitation
12.30 in
Snow
0.1 in
October records in Index
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 82.9°F (1988) | 32.0°F (2019) | 1.81 in (2017) |
| October 2 | 82.0°F (1980) | 32.0°F (1977) | 1.57 in (2007) |
| October 3 | 82.0°F (1979) | 32.0°F (1973) | 2.10 in (1995) |
| October 4 | 81.0°F (2022) | 33.1°F (1973) | 3.42 in (1997) |
| October 5 | 86.0°F (1980) | 30.9°F (1974) | 2.07 in (1975) |
| October 6 | 82.9°F (1987) | 33.1°F (1974) | 2.51 in (1981) |
| October 7 | 80.1°F (1976) | 32.0°F (1983) | 1.73 in (1982) |
| October 8 | 77.0°F (1971) | 30.0°F (1985) | 2.38 in (2019) |
| October 9 | 80.1°F (2022) | 30.0°F (1985) | 3.92 in (2016) |
| October 10 | 79.0°F (1991) | 30.9°F (2019) | 4.17 in (1995) |
| October 11 | 81.0°F (1987) | 28.0°F (2009) | 2.87 in (2015) |
| October 12 | 73.0°F (1982) | 28.0°F (2009) | 2.35 in (2020) |
| October 13 | 77.0°F (1982) | 32.0°F (1970) | 2.83 in (1973) |
| October 14 | 78.1°F (1978) | 30.9°F (1970) | 2.90 in (2020) |
| October 15 | 77.0°F (1986) | 28.0°F (1992) | 2.02 in (1988) |
| October 16 | 75.9°F (2015) | 30.0°F (1971) | 5.32 in (1988) |
| October 17 | 81.0°F (2022) | 28.9°F (1971) | 1.65 in (2003) |
| October 18 | 82.0°F (2022) | 28.9°F (1976) | 2.43 in (1996) |
| October 19 | 73.0°F (1978) | 28.9°F (1984) | 3.90 in (2017) |
| October 20 | 71.1°F (1987) | 30.9°F (1984) | 3.35 in (2016) |
| October 21 | 73.0°F (1998) | 28.0°F (1984) | 5.85 in (2003) |
| October 22 | 73.9°F (2005) | 28.9°F (1976) | 4.35 in (2017) |
| October 23 | 75.0°F (1986) | 32.0°F (1984) | 1.63 in (2009) |
| October 24 | 73.9°F (2007) | 28.9°F (1975) | 2.91 in (1985) |
| October 25 | 66.9°F (1983) | 26.1°F (2020) | 2.69 in (1985) |
| October 26 | 66.0°F (1998) | 30.0°F (1978) | 4.12 in (1994) |
| October 27 | 64.9°F (1973) | 30.0°F (1971) | 2.00 in (2009) |
| October 28 | 70.0°F (2008) | 23.0°F (1971) | 3.42 in (1973) |
| October 29 | 69.1°F (2017) | 25.0°F (1971) | 4.30 in (2021) |
| October 30 | 66.0°F (1970) | 23.0°F (2002) | 3.48 in (1997) |
| October 31 | 64.9°F (1988) | 23.0°F (2002) | 6.68 in (2015) |