Weather on May 18
Madison, WI
55 Years of Data
Avg High
71°F
Avg Low
47°F
Warmest
1971
73°F avg
Coldest
2002
41°F avg
About This Date
May 18th in Madison, WI typically brings pleasant spring weather, with average highs around 71°F and lows near 47°F. Over 55 years of records, the warmest May 18th was in 1971 (73°F average), while the coldest was 2002 (41°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 36% of May 18th dates historically, with the wettest May 18th recording 6.22" of rain. The last decade has been 2.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.9°F cooler on this date compared to 20-30 years ago.
Planning for May 18th in Madison, WI? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 68° | 45° | 56° | — | — |
| 2024 | 79° | 49° | 64° | — | — |
| 2023 | 66° | 38° | 52° | — | — |
| 2022 | 69° | 47° | 58° | 0.79" | — |
| 2021 | 73° | 57° | 65° | — | — |
| 2020 | 54° | 50° | 52° | 3.25" | — |
| 2019 | 59° | 41° | 50° | 0.84" | — |
| 2018 | 77° | 49° | 63° | — | — |
| 2017 | 81° | 58° | 69° | 1.57" | — |
| 2016 | 63° | 34° | 48° | — | — |
| 2015 | 79° | 60° | 69° | 2.62" | — |
| 2014 | 63° | 46° | 54° | — | — |
| 2013 | 65° | 48° | 56° | 1.55" | — |
| 2012 | 74° | 47° | 60° | — | — |
| 2011 | 66° | 43° | 54° | — | — |
| 2010 | 69° | 42° | 56° | — | — |
| 2009 | 64° | 36° | 50° | — | — |
| 2008 | 71° | 48° | 60° | 0.05" | — |
| 2007 | 64° | 39° | 52° | — | — |
| 2006 | 70° | 44° | 57° | 0.66" | — |
| 2005 | 70° | 48° | 59° | — | — |
| 2004 | 77° | 55° | 66° | 2.62" | — |
| 2003 | 70° | 45° | 57° | — | — |
| 2002coldest | 53° | 28° | 41° | — | — |
| 2001 | 87° | 55° | 71° | — | — |
| 2000 | 68° | 49° | 58° | 6.22" | — |
| 1999 | 71° | 54° | 62° | 0.38" | — |
| 1998 | 84° | 54° | 69° | — | — |
| 1997 | 68° | 38° | 53° | — | — |
| 1996 | 89° | 50° | 70° | 0.05" | — |
| 1995 | 66° | 43° | 54° | — | — |
| 1994 | 68° | 34° | 51° | — | — |
| 1993 | 60° | 38° | 49° | 0.71" | — |
| 1992 | 77° | 47° | 62° | — | — |
| 1991 | 64° | 44° | 54° | 0.3" | — |
| 1990 | 55° | 43° | 49° | — | — |
| 1989 | 82° | 53° | 68° | — | — |
| 1988 | 70° | 32° | 51° | — | — |
| 1987 | 86° | 58° | 72° | — | — |
| 1986 | 61° | 46° | 53° | 1.98" | — |
| 1985 | 69° | 45° | 57° | 0.28" | — |
| 1984 | 80° | 55° | 68° | — | — |
| 1983 | 62° | 44° | 53° | — | — |
| 1982 | 83° | 54° | 68° | 0.28" | — |
| 1981 | 60° | 40° | 50° | — | — |
| 1980 | 56° | 49° | 52° | 1.63" | — |
| 1979 | 83° | 61° | 72° | — | — |
| 1978 | 74° | 43° | 58° | — | — |
| 1977 | 83° | 63° | 73° | — | — |
| 1976 | 64° | 31° | 47° | — | — |
| 1975 | 77° | 45° | 61° | — | — |
| 1974 | 68° | 48° | 58° | 0.23" | — |
| 1973 | 63° | 39° | 51° | — | — |
| 1972 | 85° | 51° | 68° | — | — |
| 1971warmest | 84° | 62° | 73° | 0.41" | — |
55 years of data from UW ARBORETUM - MADISON