August weather in Eureka, MT
The average temperature in Eureka in August is 68.6°F (51.2°F–86.0°F). Average precipitation: 1.05 inches.
August is a summer month in Eureka, and is warmer than the annual average of 47°F. Daily temperatures swing about 34.8°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 14h 11m. For travel, August is a comfortable month to visit.
Avg High
86.0°F
Avg Low
51.2°F
Precipitation
1.05 in
Daylight
14h 11m
August records in Eureka
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 100.0°F (1965) | 34.0°F (2008) | 0.80 in (2013) |
| August 2 | 100.9°F (1965) | 41.0°F (1963) | 0.57 in (2010) |
| August 3 | 100.0°F (1961) | 37.9°F (2002) | 0.85 in (1984) |
| August 4 | 102.9°F (1961) | 39.9°F (1969) | 0.24 in (2025) |
| August 5 | 104.0°F (1971) | 43.0°F (1982) | 0.75 in (1996) |
| August 6 | 102.0°F (1963) | 37.0°F (1964) | 0.36 in (2000) |
| August 7 | 99.0°F (1963) | 37.0°F (1973) | 0.50 in (1995) |
| August 8 | 99.0°F (1972) | 39.9°F (1988) | 1.09 in (2021) |
| August 9 | 100.0°F (2000) | 39.0°F (1974) | 0.32 in (1982) |
| August 10 | 106.0°F (2018) | 36.0°F (1997) | 1.25 in (2019) |
| August 11 | 106.0°F (2018) | 39.0°F (1961) | 0.54 in (1987) |
| August 12 | 99.0°F (1971) | 37.9°F (1966) | 0.43 in (1999) |
| August 13 | 100.9°F (2015) | 35.1°F (2005) | 0.78 in (1989) |
| August 14 | 105.1°F (1994) | 39.0°F (1974) | 0.57 in (1968) |
| August 15 | 104.0°F (1994) | 34.0°F (1974) | 1.02 in (1989) |
| August 16 | 100.9°F (1967) | 39.9°F (1963) | 0.44 in (1972) |
| August 17 | 104.0°F (1967) | 33.1°F (1969) | 1.59 in (2021) |
| August 18 | 102.9°F (1967) | 34.0°F (1973) | 1.33 in (2005) |
| August 19 | 102.9°F (1967) | 30.0°F (1973) | 1.05 in (2004) |
| August 20 | 102.9°F (1967) | 34.0°F (1964) | 0.47 in (2021) |
| August 21 | 96.1°F (1967) | 37.0°F (1988) | 0.63 in (1993) |
| August 22 | 95.0°F (1961) | 35.1°F (1992) | 1.20 in (1992) |
| August 23 | 98.1°F (1961) | 36.0°F (1966) | 0.96 in (2004) |
| August 24 | 102.0°F (1969) | 33.1°F (1964) | 0.81 in (1989) |
| August 25 | 102.0°F (1969) | 32.0°F (1992) | 0.47 in (2004) |
| August 26 | 98.1°F (1981) | 35.1°F (1967) | 0.40 in (1989) |
| August 27 | 100.0°F (1981) | 37.9°F (1994) | 1.47 in (1966) |
| August 28 | 97.0°F (1971) | 34.0°F (2000) | 0.25 in (2024) |
| August 29 | 96.1°F (1972) | 30.0°F (1969) | 0.52 in (2010) |
| August 30 | 96.1°F (2017) | 33.1°F (1962) | 1.79 in (2023) |
| August 31 | 96.1°F (1967) | 33.1°F (1964) | 0.38 in (1979) |