August weather in Morristown, NJ
The average temperature in Morristown in August is 74.2°F (63.7°F–84.7°F). Average precipitation: 4.94 inches.
August is a summer month in Morristown, and is warmer than the annual average of 53.3°F. Daily temperatures swing about 21°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 13h 38m. For travel, August is a comfortable month to visit.
Avg High
84.7°F
Avg Low
63.7°F
Precipitation
4.94 in
Daylight
13h 38m
August records in Morristown
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 102.0°F (1954) | 44.1°F (1936) | 1.59 in (2025) |
| August 2 | 99.0°F (1999) | 50.0°F (1934) | 3.01 in (1971) |
| August 3 | 99.0°F (1955) | 46.9°F (1953) | 5.14 in (1973) |
| August 4 | 102.9°F (1944) | 48.0°F (1966) | 1.64 in (1978) |
| August 5 | 104.0°F (1944) | 45.0°F (1951) | 1.32 in (1969) |
| August 6 | 98.1°F (1955) | 39.0°F (1934) | 2.82 in (2003) |
| August 7 | 97.0°F (1955) | 46.9°F (1934) | 2.76 in (2024) |
| August 8 | 98.1°F (2001) | 48.0°F (1957) | 2.61 in (2007) |
| August 9 | 100.9°F (2001) | 48.9°F (1989) | 4.22 in (1959) |
| August 10 | 104.0°F (2001) | 46.0°F (1964) | 2.83 in (1942) |
| August 11 | 102.0°F (1944) | 44.1°F (1986) | 3.20 in (1990) |
| August 12 | 100.9°F (1944) | 48.0°F (1932) | 2.53 in (1978) |
| August 13 | 100.0°F (2016) | 45.0°F (1941) | 4.94 in (1955) |
| August 14 | 100.9°F (2002) | 37.9°F (1941) | 3.42 in (1942) |
| August 15 | 100.9°F (2002) | 45.0°F (1964) | 1.37 in (1995) |
| August 16 | 100.0°F (1944) | 48.9°F (1963) | 2.15 in (1934) |
| August 17 | 99.0°F (1944) | 46.0°F (1945) | 1.93 in (1942) |
| August 18 | 98.1°F (2002) | 39.9°F (1941) | 1.75 in (1974) |
| August 19 | 99.0°F (2002) | 44.1°F (1943) | 3.02 in (1955) |
| August 20 | 96.1°F (2002) | 41.0°F (1949) | 2.32 in (1939) |
| August 21 | 96.1°F (1983) | 41.0°F (1940) | 1.77 in (1948) |
| August 22 | 95.0°F (1955) | 42.1°F (1982) | 2.01 in (2009) |
| August 23 | 97.0°F (1943) | 46.9°F (1952) | 1.87 in (2010) |
| August 24 | 93.0°F (1947) | 41.0°F (1952) | 3.07 in (1936) |
| August 25 | 93.9°F (1947) | 36.0°F (1940) | 1.58 in (1945) |
| August 26 | 95.0°F (1948) | 37.0°F (1944) | 3.85 in (1985) |
| August 27 | 102.0°F (1948) | 37.9°F (1944) | 1.63 in (1931) |
| August 28 | 98.1°F (1948) | 37.9°F (1944) | 8.76 in (1971) |
| August 29 | 102.0°F (1953) | 39.0°F (1935) | 1.25 in (2000) |
| August 30 | 100.0°F (1953) | 35.1°F (1934) | 1.76 in (2009) |
| August 31 | 102.9°F (1953) | 6.1°F (1932) | 1.82 in (1954) |