September weather in Port Washington, WI
The average temperature in Port Washington in September is 62.5°F (53.7°F–71.3°F). Average precipitation: 3.08 inches.
September is a fall month in Port Washington, and is warmer than the annual average of 46.7°F. Daily temperatures swing about 17.6°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 17m. For travel, September is one of the best months of the year to visit.
Avg High
71.3°F
Avg Low
53.7°F
Precipitation
3.08 in
Daylight
12h 17m
September records in Port Washington
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 89.1°F (1960) | 41.0°F (1909) | 2.25 in (1905) |
| September 2 | 95.0°F (1899) | 34.0°F (1906) | 3.50 in (2000) |
| September 3 | 91.9°F (1985) | 39.9°F (1916) | 1.45 in (1970) |
| September 4 | 93.9°F (1990) | 44.1°F (1974) | 2.05 in (1921) |
| September 5 | 96.1°F (1912) | 39.9°F (1988) | 1.88 in (2008) |
| September 6 | 97.0°F (1922) | 39.9°F (1924) | 1.48 in (1925) |
| September 7 | 93.9°F (1913) | 44.1°F (1986) | 2.50 in (1907) |
| September 8 | 96.1°F (1919) | 44.1°F (1898) | 3.38 in (1941) |
| September 9 | 95.0°F (1908) | 39.9°F (1902) | 3.36 in (1965) |
| September 10 | 93.0°F (1961) | 30.0°F (1902) | 3.47 in (1986) |
| September 11 | 100.0°F (1982) | 30.0°F (1902) | 2.91 in (1986) |
| September 12 | 93.0°F (1927) | 30.0°F (1902) | 1.52 in (1961) |
| September 13 | 91.0°F (1982) | 33.1°F (1923) | 3.29 in (1961) |
| September 14 | 96.1°F (1927) | 30.9°F (1923) | 2.74 in (1914) |
| September 15 | 95.0°F (1927) | 36.0°F (1923) | 1.05 in (1912) |
| September 16 | 91.9°F (1899) | 33.1°F (1916) | 1.52 in (1915) |
| September 17 | 89.1°F (1925) | 30.9°F (1901) | 2.10 in (1907) |
| September 18 | 89.1°F (1925) | 30.9°F (1901) | 2.62 in (1960) |
| September 19 | 95.0°F (1895) | 32.0°F (1896) | 2.60 in (1906) |
| September 20 | 96.1°F (1895) | 19.9°F (1897) | 2.00 in (1923) |
| September 21 | 86.0°F (1908) | 33.1°F (1896) | 2.26 in (1947) |
| September 22 | 88.0°F (2007) | 32.0°F (1974) | 3.25 in (1988) |
| September 23 | 84.0°F (1984) | 28.0°F (1995) | 1.74 in (1926) |
| September 24 | 89.1°F (1920) | 35.1°F (1894) | 1.40 in (1899) |
| September 25 | 87.1°F (1920) | 32.0°F (1899) | 1.57 in (1994) |
| September 26 | 88.0°F (1998) | 28.0°F (1926) | 2.32 in (1959) |
| September 27 | 88.0°F (1998) | 33.1°F (1991) | 1.85 in (1907) |
| September 28 | 84.0°F (1971) | 28.0°F (1899) | 1.40 in (1906) |
| September 29 | 86.0°F (1898) | 27.0°F (1899) | 2.40 in (1896) |
| September 30 | 91.9°F (1897) | 28.9°F (1899) | 1.60 in (1941) |