August weather in Gillette, WY
The average temperature in Gillette in August is 70.6°F (55.7°F–85.4°F). Average precipitation: 1.38 inches.
August is a summer month in Gillette, and is warmer than the annual average of 46.8°F. Daily temperatures swing about 29.7°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 13h 51m. For travel, August is a comfortable month to visit.
Avg High
85.4°F
Avg Low
55.7°F
Precipitation
1.38 in
Daylight
13h 51m
August records in Gillette
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 102.0°F (1955) | 42.1°F (1968) | 1.66 in (2023) |
| August 2 | 100.0°F (1961) | 43.0°F (1978) | 1.50 in (1953) |
| August 3 | 102.0°F (1947) | 39.9°F (1974) | 0.84 in (2010) |
| August 4 | 104.0°F (1947) | 37.9°F (1980) | 0.88 in (1999) |
| August 5 | 102.0°F (1961) | 42.1°F (1980) | 0.83 in (2010) |
| August 6 | 105.1°F (1949) | 44.1°F (1996) | 0.53 in (1989) |
| August 7 | 106.0°F (1949) | 43.0°F (1996) | 0.76 in (2024) |
| August 8 | 100.9°F (1958) | 41.0°F (1939) | 2.11 in (1909) |
| August 9 | 100.0°F (1936) | 39.9°F (1948) | 0.47 in (1977) |
| August 10 | 102.0°F (1957) | 37.9°F (1939) | 1.35 in (2005) |
| August 11 | 102.0°F (1957) | 39.0°F (1977) | 0.70 in (1930) |
| August 12 | 104.0°F (1972) | 39.9°F (1952) | 1.00 in (1988) |
| August 13 | 99.0°F (1937) | 39.9°F (1966) | 1.00 in (2006) |
| August 14 | 100.0°F (1937) | 41.0°F (1995) | 1.04 in (1951) |
| August 15 | 102.9°F (1929) | 41.0°F (1944) | 3.26 in (1912) |
| August 16 | 102.0°F (1906) | 39.9°F (1925) | 0.69 in (1927) |
| August 17 | 100.9°F (1906) | 35.1°F (2002) | 2.82 in (1960) |
| August 18 | 99.0°F (1906) | 39.0°F (1950) | 1.06 in (2015) |
| August 19 | 100.9°F (1986) | 39.0°F (1950) | 0.74 in (2007) |
| August 20 | 99.0°F (2025) | 32.0°F (1964) | 1.28 in (1990) |
| August 21 | 102.0°F (2024) | 37.9°F (1974) | 0.89 in (1923) |
| August 22 | 102.9°F (1949) | 33.1°F (1966) | 0.55 in (2007) |
| August 23 | 98.1°F (1937) | 34.0°F (2015) | 2.00 in (2014) |
| August 24 | 98.1°F (1944) | 32.0°F (1910) | 0.78 in (1906) |
| August 25 | 100.0°F (2011) | 30.9°F (1917) | 0.83 in (1946) |
| August 26 | 100.0°F (1926) | 36.0°F (1917) | 1.35 in (2019) |
| August 27 | 99.0°F (1937) | 36.0°F (1917) | 1.81 in (1955) |
| August 28 | 100.0°F (1983) | 36.0°F (1911) | 1.20 in (1941) |
| August 29 | 102.0°F (2012) | 36.0°F (1917) | 2.60 in (1996) |
| August 30 | 102.9°F (1948) | 36.0°F (1964) | 0.63 in (1962) |
| August 31 | 96.1°F (1983) | 35.1°F (1932) | 0.41 in (1957) |