Weather on September 20
Milwaukee, WI
55 Years of Data
About This Date
September 20th in Milwaukee, WI typically brings pleasant fall weather, with average highs around 72°F and lows near 54°F. Over 55 years of records, the warmest September 20th was in 2021 (76°F average), while the coldest was 2006 (48°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 44% of September 20th dates historically, with the wettest September 20th recording 5.41" of rain. The last decade has been 5.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.4°F warmer on this date compared to 20-30 years ago.
Planning for September 20th in Milwaukee, WI? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 66° | 72° | 0.2" | — |
| 2024 | 90° | 58° | 74° | 0.38" | — |
| 2023 | 70° | 58° | 64° | 0.08" | — |
| 2022 | 80° | 60° | 70° | 0.05" | — |
| 2021warmest | 80° | 71° | 76° | 0.2" | — |
| 2020 | 68° | 46° | 57° | — | — |
| 2019 | 79° | 64° | 71° | — | — |
| 2018 | 83° | 67° | 75° | 5.41" | — |
| 2017 | 86° | 58° | 72° | — | — |
| 2016 | 79° | 58° | 68° | — | — |
| 2015 | 69° | 50° | 60° | — | — |
| 2014 | 78° | 63° | 70° | 0.53" | — |
| 2013 | 75° | 60° | 68° | — | — |
| 2012 | 69° | 50° | 60° | — | — |
| 2011 | 75° | 49° | 62° | — | — |
| 2010 | 60° | 53° | 57° | 0.08" | — |
| 2009 | 75° | 53° | 64° | — | — |
| 2008 | 79° | 55° | 67° | — | — |
| 2007 | 80° | 56° | 68° | — | — |
| 2006coldest | 56° | 41° | 48° | — | — |
| 2005 | 83° | 56° | 69° | 0.41" | — |
| 2004 | 79° | 56° | 67° | — | — |
| 2003 | 67° | 43° | 55° | — | — |
| 2002 | 82° | 65° | 73° | 2.13" | — |
| 2001 | 62° | 53° | 58° | 0.2" | — |
| 2000 | 81° | 57° | 69° | — | — |
| 1999 | 81° | 49° | 65° | 1.55" | — |
| 1998 | 82° | 65° | 73° | — | — |
| 1997 | 61° | 47° | 54° | — | — |
| 1996 | 73° | 51° | 62° | 0.1" | — |
| 1995 | 59° | 48° | 54° | 0.3" | — |
| 1994 | 86° | 63° | 74° | — | — |
| 1993 | 61° | 58° | 59° | 1.88" | — |
| 1992 | 68° | 48° | 58° | 1.07" | — |
| 1991 | 59° | 39° | 49° | — | — |
| 1990 | 72° | 50° | 61° | — | — |
| 1989 | 76° | 56° | 66° | — | — |
| 1988 | 59° | 52° | 55° | 0.18" | — |
| 1987 | 58° | 52° | 55° | 1.65" | — |
| 1986 | 63° | 58° | 60° | — | — |
| 1985 | 79° | 59° | 69° | — | — |
| 1984 | 75° | 59° | 67° | — | — |
| 1983 | 74° | 45° | 59° | 1.22" | — |
| 1982 | 58° | 46° | 52° | 0.05" | — |
| 1981 | 65° | 49° | 57° | — | — |
| 1980 | 72° | 65° | 68° | 1.73" | — |
| 1979 | 79° | 52° | 65° | — | — |
| 1978 | 77° | 59° | 68° | 2.11" | — |
| 1977 | 57° | 48° | 53° | — | — |
| 1976 | 64° | 51° | 58° | 0.03" | — |
| 1975 | 56° | 50° | 53° | — | — |
| 1974 | 67° | 52° | 59° | — | — |
| 1973 | 59° | 39° | 49° | — | — |
| 1972 | 78° | 62° | 70° | 2.74" | — |
| 1971 | 66° | 51° | 59° | — | — |
Milwaukee, WI Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Milwaukee, WI Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Milwaukee, WI Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Milwaukee, WI
Milwaukee, WI has no months that meet our "pleasant" threshold — every season has tradeoffs.