August weather in Irwin, ID
The average temperature in Irwin in August is 64.2°F (44.2°F–84.2°F). Average precipitation: 1.25 inches.
August is a summer month in Irwin, and is warmer than the annual average of 42.6°F. Daily temperatures swing about 40°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 13h 47m. For travel, August is a comfortable month to visit.
Avg High
84.2°F
Avg Low
44.2°F
Precipitation
1.25 in
Daylight
13h 47m
August records in Irwin
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 93.9°F (2000) | 34.0°F (1975) | 0.97 in (2011) |
| August 2 | 95.0°F (1961) | 33.1°F (1963) | 0.56 in (1984) |
| August 3 | 99.0°F (2024) | 34.0°F (1963) | 0.91 in (2003) |
| August 4 | 100.9°F (2024) | 26.1°F (1980) | 0.91 in (2023) |
| August 5 | 96.1°F (1994) | 30.9°F (1980) | 0.38 in (1962) |
| August 6 | 97.0°F (2024) | 30.9°F (1969) | 0.59 in (1974) |
| August 7 | 100.9°F (1990) | 34.0°F (1969) | 1.34 in (2022) |
| August 8 | 100.0°F (1990) | 32.0°F (1967) | 0.91 in (1979) |
| August 9 | 100.0°F (1990) | 30.9°F (1985) | 0.67 in (2015) |
| August 10 | 97.0°F (1990) | 32.0°F (1980) | 0.52 in (1997) |
| August 11 | 95.0°F (2018) | 34.0°F (1980) | 0.58 in (1993) |
| August 12 | 97.0°F (2018) | 34.0°F (1987) | 0.78 in (1988) |
| August 13 | 97.0°F (2025) | 33.1°F (1987) | 0.97 in (1978) |
| August 14 | 102.0°F (2025) | 28.9°F (1985) | 0.60 in (2014) |
| August 15 | 97.0°F (2025) | 30.9°F (2002) | 0.63 in (1960) |
| August 16 | 93.9°F (2023) | 32.0°F (1968) | 1.34 in (1980) |
| August 17 | 93.0°F (1966) | 28.9°F (1987) | 0.54 in (2004) |
| August 18 | 97.0°F (2020) | 30.0°F (1987) | 0.61 in (2005) |
| August 19 | 93.9°F (2024) | 30.9°F (1995) | 0.67 in (2024) |
| August 20 | 97.0°F (2025) | 28.0°F (1964) | 0.75 in (1983) |
| August 21 | 95.0°F (2019) | 28.0°F (1964) | 0.90 in (2014) |
| August 22 | 95.0°F (1969) | 28.0°F (1988) | 0.63 in (1968) |
| August 23 | 93.9°F (2025) | 30.0°F (1985) | 0.81 in (1976) |
| August 24 | 97.0°F (2025) | 27.0°F (1992) | 0.76 in (1995) |
| August 25 | 96.1°F (1985) | 26.1°F (1992) | 1.12 in (1961) |
| August 26 | 95.0°F (1985) | 24.1°F (1992) | 0.60 in (1977) |
| August 27 | 91.0°F (1971) | 27.0°F (1976) | 0.42 in (2025) |
| August 28 | 93.0°F (2012) | 25.0°F (1960) | 0.91 in (2025) |
| August 29 | 91.0°F (2005) | 30.0°F (1960) | 0.72 in (1971) |
| August 30 | 93.9°F (1991) | 27.0°F (1962) | 0.57 in (1982) |
| August 31 | 97.0°F (2022) | 23.0°F (1962) | 1.02 in (2011) |