August weather in Waltham, MA
The average temperature in Waltham in August is 71.9°F (60.3°F–83.6°F). Average precipitation: 3.47 inches.
August is a summer month in Waltham, and is warmer than the annual average of 50.5°F. Daily temperatures swing about 23.3°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 13h 44m. For travel, August is a comfortable month to visit.
Avg High
83.6°F
Avg Low
60.3°F
Precipitation
3.47 in
Daylight
13h 44m
August records in Waltham
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 97.0°F (1955) | 43.0°F (1964) | 1.40 in (2005) |
| August 2 | 98.1°F (2006) | 46.0°F (1953) | 0.94 in (2017) |
| August 3 | 96.1°F (2007) | 45.0°F (1953) | 1.81 in (2001) |
| August 4 | 99.0°F (2022) | 45.0°F (1964) | 1.05 in (1969) |
| August 5 | 100.9°F (1955) | 50.0°F (1951) | 1.78 in (1952) |
| August 6 | 97.0°F (2022) | 45.0°F (1951) | 1.08 in (1952) |
| August 7 | 97.0°F (2022) | 46.0°F (1964) | 1.41 in (2019) |
| August 8 | 97.0°F (2022) | 48.9°F (1957) | 3.56 in (2023) |
| August 9 | 99.0°F (1949) | 48.0°F (1964) | 1.23 in (2011) |
| August 10 | 100.0°F (1949) | 44.1°F (1964) | 1.52 in (1952) |
| August 11 | 96.1°F (2020) | 45.0°F (1963) | 0.50 in (2015) |
| August 12 | 95.0°F (2002) | 46.0°F (1968) | 1.94 in (2004) |
| August 13 | 98.1°F (2002) | 45.0°F (2006) | 1.46 in (2014) |
| August 14 | 99.0°F (2002) | 43.0°F (1964) | 1.22 in (1999) |
| August 15 | 98.1°F (1970) | 46.0°F (1964) | 1.43 in (2011) |
| August 16 | 96.1°F (1970) | 39.0°F (1964) | 1.03 in (1951) |
| August 17 | 93.9°F (2002) | 46.9°F (1963) | 1.14 in (1962) |
| August 18 | 95.0°F (2002) | 46.9°F (2000) | 3.00 in (1955) |
| August 19 | 95.0°F (2019) | 44.1°F (1968) | 6.94 in (1955) |
| August 20 | 95.0°F (2022) | 42.1°F (1964) | 3.39 in (1950) |
| August 21 | 95.0°F (1955) | 45.0°F (2000) | 1.56 in (2004) |
| August 22 | 129.9°F (2019) | 46.0°F (1950) | 0.79 in (2021) |
| August 23 | 93.9°F (2020) | 42.1°F (1957) | 1.50 in (2021) |
| August 24 | 91.0°F (1969) | 45.0°F (1962) | 1.20 in (1953) |
| August 25 | 97.0°F (2007) | 45.0°F (1956) | 1.96 in (2010) |
| August 26 | 95.0°F (1949) | 42.1°F (1963) | 1.07 in (1964) |
| August 27 | 97.0°F (1949) | 44.1°F (1954) | 1.10 in (2011) |
| August 28 | 95.0°F (1949) | 44.1°F (1957) | 2.86 in (2011) |
| August 29 | 99.0°F (1953) | 44.1°F (1954) | 1.48 in (1962) |
| August 30 | 96.1°F (1953) | 41.0°F (1965) | 0.51 in (2005) |
| August 31 | 96.1°F (1953) | 33.1°F (1965) | 3.03 in (1954) |