Weather on September 18
Milwaukee, WI
55 Years of Data
Avg High
74°F
Avg Low
55°F
Warmest
1985
76°F avg
Coldest
2012
51°F avg
About This Date
September 18th in Milwaukee, WI typically brings pleasant fall weather, with average highs around 74°F and lows near 55°F. Over 55 years of records, the warmest September 18th was in 1985 (76°F average), while the coldest was 2012 (51°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 31% of September 18th dates historically, with the wettest September 18th recording 5.66" of rain. The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
Planning for September 18th in Milwaukee, WI? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 86° | 60° | 73° | — | — |
| 2024 | 86° | 56° | 71° | — | — |
| 2023 | 70° | 50° | 60° | 0.18" | — |
| 2022 | 84° | 68° | 76° | — | — |
| 2021 | 72° | 60° | 66° | — | — |
| 2020 | 59° | 47° | 53° | — | — |
| 2019 | 77° | 63° | 70° | — | — |
| 2018 | 72° | 63° | 67° | 0.2" | — |
| 2017 | 71° | 54° | 62° | — | — |
| 2016 | 78° | 58° | 68° | — | — |
| 2015 | 72° | 61° | 66° | 2.21" | — |
| 2014 | 59° | 51° | 55° | — | — |
| 2013 | 79° | 61° | 70° | 0.1" | — |
| 2012coldest | 59° | 43° | 51° | — | — |
| 2011 | 65° | 60° | 62° | 1.32" | — |
| 2010 | 78° | 51° | 65° | 1.07" | — |
| 2009 | 75° | 52° | 63° | — | — |
| 2008 | 78° | 51° | 65° | — | — |
| 2007 | 76° | 54° | 65° | — | — |
| 2006 | 85° | 54° | 69° | 0.56" | — |
| 2005 | 79° | 55° | 67° | — | — |
| 2004 | 74° | 50° | 62° | — | — |
| 2003 | 83° | 60° | 71° | — | — |
| 2002 | 85° | 56° | 70° | 0.33" | — |
| 2001 | 65° | 54° | 59° | 0.08" | — |
| 2000 | 79° | 52° | 65° | — | — |
| 1999 | 72° | 48° | 60° | — | — |
| 1998 | 77° | 54° | 65° | — | — |
| 1997 | 82° | 52° | 67° | — | — |
| 1996 | 68° | 51° | 60° | — | — |
| 1995 | 63° | 45° | 54° | — | — |
| 1994 | 82° | 56° | 69° | — | — |
| 1993 | 64° | 49° | 56° | — | — |
| 1992 | 73° | 49° | 61° | 0.08" | — |
| 1991 | 63° | 44° | 53° | 0.05" | — |
| 1990 | 67° | 50° | 58° | 0.61" | — |
| 1989 | 75° | 52° | 63° | — | — |
| 1988 | 75° | 67° | 71° | — | — |
| 1987 | 63° | 54° | 58° | 1.78" | — |
| 1986 | 66° | 57° | 62° | — | — |
| 1985warmest | 86° | 67° | 76° | — | — |
| 1984 | 76° | 50° | 63° | — | — |
| 1983 | 81° | 63° | 72° | 0.23" | — |
| 1982 | 64° | 49° | 56° | — | — |
| 1981 | 60° | 45° | 52° | — | — |
| 1980 | 75° | 50° | 63° | — | — |
| 1979 | 78° | 54° | 66° | — | — |
| 1978 | 81° | 60° | 70° | 1.93" | — |
| 1977 | 83° | 62° | 72° | 0.79" | — |
| 1976 | 78° | 58° | 68° | — | — |
| 1975 | 75° | 65° | 70° | — | — |
| 1974 | 69° | 51° | 60° | — | — |
| 1973 | 67° | 42° | 54° | — | — |
| 1972 | 79° | 61° | 70° | 5.66" | — |
| 1971 | 63° | 55° | 59° | — | — |
55 years of data from W ALLIS