September weather in St. John, ND
The average temperature in St. John in September is 53.8°F (42.6°F–65.1°F). Average precipitation: 1.74 inches.
September is a fall month in St. John, and is warmer than the annual average of 36.5°F. Daily temperatures swing about 22.5°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 20m. For travel, September is a comfortable month to visit.
Avg High
65.1°F
Avg Low
42.6°F
Precipitation
1.74 in
Daylight
12h 20m
September records in St. John
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.0°F (1983) | 34.0°F (1946) | 0.35 in (1976) |
| September 2 | 95.0°F (1960) | 28.0°F (1946) | 1.00 in (1968) |
| September 3 | 93.9°F (1983) | 30.0°F (1961) | 1.65 in (1941) |
| September 4 | 91.9°F (1945) | 30.0°F (1974) | 2.47 in (1941) |
| September 5 | 93.9°F (1945) | 34.0°F (1962) | 0.67 in (1904) |
| September 6 | 96.1°F (1978) | 32.0°F (1956) | 1.84 in (1981) |
| September 7 | 98.1°F (1976) | 35.1°F (1946) | 0.72 in (2000) |
| September 8 | 90.0°F (1959) | 30.9°F (1956) | 0.52 in (1941) |
| September 9 | 93.0°F (1978) | 30.0°F (2006) | 0.77 in (1950) |
| September 10 | 89.1°F (1994) | 26.1°F (1955) | 0.37 in (1945) |
| September 11 | 88.0°F (1939) | 28.0°F (1940) | 1.97 in (2003) |
| September 12 | 91.0°F (1966) | 28.0°F (1905) | 2.57 in (1980) |
| September 13 | 87.1°F (1959) | 24.1°F (1970) | 0.28 in (1972) |
| September 14 | 93.0°F (1946) | 23.0°F (1956) | 6.40 in (1905) |
| September 15 | 84.9°F (1946) | 25.0°F (1945) | 1.78 in (1983) |
| September 16 | 88.0°F (1952) | 28.9°F (1959) | 1.15 in (1967) |
| September 17 | 86.0°F (1979) | 28.9°F (1959) | 0.56 in (1987) |
| September 18 | 93.0°F (1939) | 28.9°F (1904) | 1.57 in (1975) |
| September 19 | 86.0°F (1970) | 19.9°F (1952) | 1.30 in (1975) |
| September 20 | 88.0°F (1960) | 27.0°F (1904) | 1.02 in (2004) |
| September 21 | 93.0°F (1938) | 26.1°F (1904) | 1.14 in (1970) |
| September 22 | 95.0°F (1938) | 23.0°F (1947) | 1.01 in (1959) |
| September 23 | 80.1°F (2007) | 25.0°F (1983) | 0.62 in (2008) |
| September 24 | 84.0°F (1949) | 23.0°F (1947) | 1.07 in (1977) |
| September 25 | 95.0°F (1938) | 19.9°F (1939) | 0.64 in (1973) |
| September 26 | 89.1°F (1963) | 17.1°F (1965) | 0.76 in (1964) |
| September 27 | 89.1°F (1952) | 19.0°F (1942) | 0.61 in (1996) |
| September 28 | 84.0°F (1905) | 18.0°F (1942) | 1.82 in (1982) |
| September 29 | 84.0°F (1905) | 17.1°F (1945) | 0.34 in (1958) |
| September 30 | 82.9°F (2007) | 25.0°F (1939) | 0.36 in (1983) |