Weather on May 18
Green Bay, WI
55 Years of Data
Avg High
68°F
Avg Low
46°F
Warmest
1998
76°F avg
Coldest
2002
41°F avg
About This Date
May 18th in Green Bay, WI typically brings mild spring weather, with average highs around 68°F and lows near 46°F. Over 55 years of records, the warmest May 18th was in 1998 (76°F average), while the coldest was 2002 (41°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 45% of May 18th dates historically, with the wettest May 18th recording 2.62" of rain. The last decade has been 3.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.0°F cooler on this date compared to 20-30 years ago.
Planning for May 18th in Green Bay, 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 | 57° | 42° | 50° | — | — |
| 2024 | 86° | 53° | 70° | 0.43" | — |
| 2023 | 71° | 36° | 53° | 0.03" | — |
| 2022 | 67° | 49° | 58° | 0.18" | — |
| 2021 | 77° | 48° | 63° | — | — |
| 2020 | 51° | 48° | 50° | 2.03" | — |
| 2019 | 49° | 44° | 46° | 0.43" | — |
| 2018 | 67° | 47° | 57° | — | — |
| 2017 | 67° | 40° | 53° | 0.08" | — |
| 2016 | 67° | 36° | 51° | — | — |
| 2015 | 70° | 49° | 59° | — | — |
| 2014 | 72° | 46° | 59° | — | — |
| 2013 | 74° | 52° | 63° | 0.1" | — |
| 2012 | 84° | 51° | 68° | — | — |
| 2011 | 60° | 46° | 53° | 0.08" | — |
| 2010 | 75° | 42° | 59° | — | — |
| 2009 | 66° | 37° | 52° | — | — |
| 2008 | 59° | 37° | 48° | 0.03" | — |
| 2007 | 71° | 40° | 55° | — | — |
| 2006 | 58° | 46° | 52° | — | — |
| 2005 | 68° | 53° | 61° | 0.23" | — |
| 2004 | 65° | 47° | 56° | — | — |
| 2003 | 69° | 48° | 59° | — | — |
| 2002coldest | 52° | 30° | 41° | — | — |
| 2001 | 75° | 48° | 62° | — | — |
| 2000 | 53° | 39° | 46° | 0.81" | — |
| 1999 | 68° | 48° | 58° | 0.3" | — |
| 1998warmest | 87° | 65° | 76° | — | — |
| 1997 | 59° | 42° | 51° | 0.13" | — |
| 1996 | 88° | 54° | 71° | — | — |
| 1995 | 73° | 40° | 56° | — | — |
| 1994 | 65° | 40° | 52° | — | — |
| 1993 | 56° | 38° | 47° | 0.33" | — |
| 1992 | 60° | 40° | 50° | — | — |
| 1991 | 50° | 45° | 47° | — | — |
| 1990 | 64° | 46° | 55° | — | — |
| 1989 | 77° | 54° | 65° | 0.05" | — |
| 1988 | 70° | 37° | 53° | — | — |
| 1987 | 55° | 45° | 50° | 0.3" | — |
| 1986 | 65° | 44° | 54° | — | — |
| 1985 | 64° | 44° | 54° | 0.2" | — |
| 1984 | 78° | 57° | 68° | 0.18" | — |
| 1983 | 60° | 39° | 50° | 0.08" | — |
| 1982 | 75° | 59° | 67° | 0.56" | — |
| 1981 | 60° | 33° | 47° | — | — |
| 1980 | 66° | 49° | 57° | 0.61" | — |
| 1979 | 80° | 60° | 70° | 1.55" | — |
| 1978 | 81° | 49° | 65° | — | — |
| 1977 | 84° | 60° | 72° | — | — |
| 1976 | 65° | 36° | 50° | — | — |
| 1975 | 83° | 47° | 65° | 0.53" | — |
| 1974 | 53° | 47° | 50° | — | — |
| 1973 | 69° | 37° | 53° | 0.3" | — |
| 1972 | 88° | 52° | 70° | — | — |
| 1971 | 73° | 49° | 61° | 2.62" | — |
55 years of data from GREEN BAY