September weather in Harlem, MT
The average temperature in Harlem in September is 57.9°F (41.7°F–74.1°F). Average precipitation: 1.09 inches.
September is a fall month in Harlem, and is warmer than the annual average of 43.6°F. Daily temperatures swing about 32.4°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 12h 20m. For travel, September is a comfortable month to visit.
Avg High
74.1°F
Avg Low
41.7°F
Precipitation
1.09 in
Daylight
12h 20m
September records in Harlem
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.0°F (1983) | 30.0°F (1930) | 1.01 in (2008) |
| September 2 | 100.0°F (1940) | 30.0°F (1974) | 0.67 in (1951) |
| September 3 | 97.0°F (1945) | 25.0°F (1962) | 0.47 in (1958) |
| September 4 | 98.1°F (1967) | 27.0°F (1935) | 0.43 in (1993) |
| September 5 | 100.0°F (1967) | 27.0°F (1956) | 0.68 in (1938) |
| September 6 | 100.0°F (1988) | 30.0°F (1949) | 0.60 in (1937) |
| September 7 | 96.1°F (1957) | 28.0°F (1935) | 0.85 in (1946) |
| September 8 | 93.9°F (1994) | 25.0°F (1943) | 0.65 in (1946) |
| September 9 | 97.0°F (1998) | 21.9°F (1962) | 0.54 in (1983) |
| September 10 | 93.9°F (1981) | 19.0°F (1955) | 0.34 in (1984) |
| September 11 | 93.9°F (1958) | 23.0°F (1989) | 1.15 in (1930) |
| September 12 | 93.9°F (1981) | 19.0°F (1949) | 2.80 in (1978) |
| September 13 | 91.0°F (1959) | 19.9°F (1970) | 0.82 in (1967) |
| September 14 | 93.9°F (1935) | 28.0°F (1951) | 0.52 in (1986) |
| September 15 | 93.0°F (2000) | 25.0°F (1970) | 0.95 in (2006) |
| September 16 | 93.0°F (1998) | 24.1°F (1936) | 1.23 in (1996) |
| September 17 | 91.9°F (1964) | 24.1°F (2006) | 0.96 in (1977) |
| September 18 | 93.0°F (1966) | 19.0°F (1991) | 0.82 in (1947) |
| September 19 | 91.9°F (1981) | 23.0°F (1957) | 0.73 in (1986) |
| September 20 | 93.0°F (1984) | 17.1°F (1934) | 1.20 in (1968) |
| September 21 | 91.9°F (1936) | 12.9°F (1995) | 1.03 in (1959) |
| September 22 | 91.9°F (1938) | 21.9°F (1995) | 0.50 in (1934) |
| September 23 | 93.9°F (1992) | 21.0°F (1943) | 0.57 in (1930) |
| September 24 | 91.0°F (1938) | 18.0°F (1961) | 0.67 in (1931) |
| September 25 | 91.9°F (2001) | 18.0°F (1934) | 5.76 in (1986) |
| September 26 | 95.0°F (1952) | 17.1°F (1934) | 0.37 in (1981) |
| September 27 | 91.0°F (1962) | 14.0°F (1961) | 0.99 in (1982) |
| September 28 | 90.0°F (1967) | 15.1°F (1984) | 0.98 in (1954) |
| September 29 | 91.0°F (1967) | 16.0°F (1984) | 0.42 in (1937) |
| September 30 | 93.0°F (1997) | 21.0°F (1958) | 0.52 in (1977) |