September weather in Lambertville, NJ
The average temperature in Lambertville in September is 66.7°F (53.7°F–79.8°F). Average precipitation: 4.44 inches.
September is a fall month in Lambertville, and is warmer than the annual average of 53.1°F. Daily temperatures swing about 26.1°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 15m. For travel, September is a comfortable month to visit.
Avg High
79.8°F
Avg Low
53.7°F
Precipitation
4.44 in
Daylight
12h 15m
September records in Lambertville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 98.1°F (1953) | 46.9°F (1963) | 1.93 in (1952) |
| September 2 | 104.0°F (1953) | 43.0°F (1949) | 8.42 in (2021) |
| September 3 | 100.0°F (1953) | 43.0°F (1967) | 1.95 in (2006) |
| September 4 | 95.0°F (1973) | 41.0°F (1994) | 1.88 in (1974) |
| September 5 | 95.0°F (1983) | 39.0°F (1994) | 1.03 in (2025) |
| September 6 | 99.0°F (1983) | 43.0°F (1984) | 2.68 in (1979) |
| September 7 | 95.0°F (1983) | 39.9°F (1984) | 3.00 in (2011) |
| September 8 | 91.9°F (1976) | 39.9°F (2000) | 3.85 in (2011) |
| September 9 | 93.9°F (1959) | 39.0°F (2000) | 2.42 in (1996) |
| September 10 | 100.0°F (1983) | 37.0°F (1956) | 1.19 in (1948) |
| September 11 | 100.0°F (1983) | 39.0°F (1994) | 2.47 in (1945) |
| September 12 | 95.0°F (1952) | 37.0°F (1994) | 3.73 in (1960) |
| September 13 | 95.0°F (1952) | 41.0°F (1941) | 2.80 in (1944) |
| September 14 | 93.0°F (1931) | 39.0°F (1975) | 2.14 in (1933) |
| September 15 | 91.9°F (1995) | 35.1°F (2001) | 1.40 in (1966) |
| September 16 | 93.0°F (1970) | 34.0°F (2001) | 1.87 in (1999) |
| September 17 | 93.0°F (1991) | 37.0°F (1959) | 4.02 in (1999) |
| September 18 | 91.9°F (1965) | 37.0°F (1937) | 1.40 in (1958) |
| September 19 | 95.0°F (1983) | 37.0°F (1959) | 2.65 in (1938) |
| September 20 | 93.0°F (1983) | 33.1°F (1993) | 4.55 in (1989) |
| September 21 | 91.0°F (1931) | 33.1°F (1956) | 3.55 in (1938) |
| September 22 | 93.9°F (1931) | 34.0°F (1962) | 2.99 in (1979) |
| September 23 | 95.0°F (1970) | 35.1°F (1947) | 2.17 in (1975) |
| September 24 | 93.9°F (1970) | 28.9°F (1963) | 1.86 in (1975) |
| September 25 | 93.9°F (1970) | 34.0°F (1963) | 2.18 in (1991) |
| September 26 | 91.0°F (1970) | 33.1°F (1999) | 1.48 in (2018) |
| September 27 | 87.1°F (1933) | 30.0°F (1947) | 5.34 in (1985) |
| September 28 | 90.0°F (1998) | 30.0°F (1947) | 1.35 in (2018) |
| September 29 | 91.9°F (1959) | 30.0°F (2000) | 5.45 in (2004) |
| September 30 | 89.1°F (1986) | 30.9°F (2000) | 1.60 in (2020) |