September weather in Lynnville, IA
The average temperature in Lynnville in September is 62.7°F (50.2°F–75.2°F). Average precipitation: 3.71 inches.
September is a fall month in Lynnville, and is warmer than the annual average of 47.5°F. Daily temperatures swing about 25°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 16m. For travel, September is one of the best months of the year to visit.
Avg High
75.2°F
Avg Low
50.2°F
Precipitation
3.71 in
Daylight
12h 16m
September records in Lynnville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.0°F (1913) | 33.1°F (1949) | 3.00 in (2018) |
| September 2 | 99.0°F (1913) | 35.1°F (1967) | 4.54 in (2018) |
| September 3 | 100.0°F (1913) | 36.0°F (1974) | 1.42 in (1961) |
| September 4 | 100.9°F (1925) | 33.1°F (1974) | 2.56 in (1949) |
| September 5 | 100.0°F (1913) | 33.1°F (1974) | 1.37 in (1994) |
| September 6 | 98.1°F (1922) | 37.0°F (1988) | 1.32 in (1958) |
| September 7 | 98.1°F (1922) | 35.1°F (1986) | 2.43 in (2007) |
| September 8 | 98.1°F (1912) | 33.1°F (1986) | 2.04 in (2016) |
| September 9 | 98.1°F (1955) | 33.1°F (1986) | 1.41 in (1989) |
| September 10 | 98.1°F (2013) | 30.9°F (1976) | 3.20 in (2014) |
| September 11 | 96.1°F (2013) | 30.9°F (1976) | 1.05 in (1921) |
| September 12 | 96.1°F (1927) | 37.0°F (2007) | 1.64 in (1961) |
| September 13 | 95.0°F (1927) | 33.1°F (2014) | 4.05 in (1961) |
| September 14 | 96.1°F (2025) | 33.1°F (1996) | 3.14 in (1914) |
| September 15 | 97.0°F (1927) | 32.0°F (1996) | 2.95 in (1970) |
| September 16 | 97.0°F (1931) | 32.0°F (1984) | 3.04 in (1921) |
| September 17 | 95.0°F (1925) | 32.0°F (1900) | 1.45 in (1914) |
| September 18 | 93.9°F (1925) | 32.0°F (1973) | 1.92 in (2022) |
| September 19 | 93.0°F (1925) | 32.0°F (1981) | 2.31 in (1983) |
| September 20 | 93.0°F (1908) | 27.0°F (1991) | 1.85 in (1978) |
| September 21 | 95.0°F (2022) | 27.0°F (1991) | 2.13 in (1986) |
| September 22 | 91.9°F (1930) | 26.1°F (1974) | 0.98 in (2019) |
| September 23 | 91.9°F (1930) | 25.0°F (2012) | 1.47 in (1985) |
| September 24 | 89.1°F (2017) | 24.1°F (2012) | 1.87 in (1960) |
| September 25 | 90.0°F (1956) | 28.0°F (1907) | 2.25 in (1915) |
| September 26 | 88.0°F (1956) | 27.0°F (1928) | 2.10 in (1915) |
| September 27 | 90.0°F (1954) | 28.0°F (1980) | 2.05 in (1959) |
| September 28 | 97.0°F (1953) | 25.0°F (1951) | 1.14 in (1965) |
| September 29 | 90.0°F (1953) | 21.0°F (1984) | 2.00 in (1954) |
| September 30 | 91.0°F (1952) | 21.9°F (1984) | 5.52 in (1919) |