August weather in Grand Lake, CO
The average temperature in Grand Lake in August is 55.8°F (38.4°F–73.3°F). Average precipitation: 2.09 inches.
August is a summer month in Grand Lake, and is warmer than the annual average of 36.9°F. Daily temperatures swing about 34.9°F between overnight low and afternoon high. Expect about 15 days with precipitation. Daylight averages about 13h 36m. For travel, August is a comfortable month to visit.
Avg High
73.3°F
Avg Low
38.4°F
Precipitation
2.09 in
Daylight
13h 36m
August records in Grand Lake
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 87.1°F (2000) | 23.0°F (1973) | 0.65 in (1953) |
| August 2 | 88.0°F (2024) | 27.0°F (1973) | 0.96 in (1953) |
| August 3 | 87.1°F (1941) | 28.0°F (1975) | 1.15 in (2021) |
| August 4 | 84.9°F (2024) | 28.0°F (1944) | 0.71 in (1966) |
| August 5 | 89.1°F (1979) | 25.0°F (1956) | 1.45 in (1954) |
| August 6 | 88.0°F (1979) | 25.0°F (1962) | 0.75 in (2010) |
| August 7 | 89.1°F (1979) | 28.0°F (1950) | 0.57 in (1941) |
| August 8 | 91.9°F (1995) | 25.0°F (1956) | 0.42 in (1986) |
| August 9 | 89.1°F (2000) | 28.0°F (1950) | 0.51 in (1916) |
| August 10 | 86.0°F (2003) | 25.0°F (1956) | 0.95 in (1997) |
| August 11 | 84.9°F (2022) | 28.0°F (1974) | 0.85 in (1963) |
| August 12 | 89.1°F (1971) | 28.0°F (1951) | 0.82 in (1957) |
| August 13 | 89.1°F (1994) | 26.1°F (1953) | 0.85 in (1909) |
| August 14 | 87.1°F (1940) | 27.0°F (1950) | 0.46 in (2014) |
| August 15 | 84.9°F (1988) | 26.1°F (1950) | 1.12 in (2015) |
| August 16 | 84.9°F (2002) | 25.0°F (1944) | 0.75 in (2008) |
| August 17 | 84.0°F (1986) | 24.1°F (1960) | 1.77 in (2003) |
| August 18 | 84.9°F (1986) | 25.0°F (1960) | 0.85 in (1972) |
| August 19 | 84.9°F (1986) | 23.0°F (1978) | 0.91 in (2004) |
| August 20 | 86.0°F (2025) | 19.9°F (1980) | 1.92 in (1917) |
| August 21 | 82.9°F (1960) | 23.0°F (1978) | 1.57 in (1984) |
| August 22 | 82.9°F (1960) | 26.1°F (1964) | 0.80 in (1911) |
| August 23 | 82.9°F (1949) | 27.0°F (1950) | 0.24 in (1940) |
| August 24 | 82.9°F (1988) | 24.1°F (1968) | 0.78 in (1940) |
| August 25 | 84.0°F (1988) | 23.0°F (1962) | 0.61 in (1963) |
| August 26 | 82.9°F (1994) | 24.1°F (1962) | 0.62 in (1980) |
| August 27 | 82.9°F (1994) | 21.0°F (1992) | 1.75 in (1999) |
| August 28 | 84.0°F (2001) | 21.9°F (1964) | 1.77 in (1984) |
| August 29 | 82.9°F (1948) | 18.0°F (1978) | 1.00 in (1909) |
| August 30 | 84.0°F (1948) | 21.9°F (1964) | 0.75 in (1909) |
| August 31 | 89.1°F (1960) | 24.1°F (1962) | 0.27 in (2001) |