Weather on August 18
Green Bay, WI
55 Years of Data
Avg High
78°F
Avg Low
57°F
Warmest
1972
78°F avg
Coldest
1977
56°F avg
About This Date
August 18th in Green Bay, WI typically brings pleasant summer weather, with average highs around 78°F and lows near 57°F. Over 55 years of records, the warmest August 18th was in 1972 (78°F average), while the coldest was 1977 (56°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 31% of August 18th dates historically, with the wettest August 18th recording 4.22" of rain. The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
Planning for August 18th in Green Bay, WI? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 67° | 62° | 64° | 1.09" | — |
| 2024 | 78° | 60° | 69° | — | — |
| 2023 | 76° | 51° | 63° | — | — |
| 2022 | 83° | 59° | 71° | — | — |
| 2021 | 87° | 59° | 73° | — | — |
| 2020 | 77° | 51° | 64° | — | — |
| 2019 | 78° | 63° | 70° | — | — |
| 2018 | 79° | 57° | 68° | — | — |
| 2017 | 73° | 62° | 68° | — | — |
| 2016 | 87° | 59° | 73° | — | — |
| 2015 | 79° | 68° | 73° | 0.41" | — |
| 2014 | 77° | 52° | 64° | 1.22" | — |
| 2013 | 81° | 54° | 67° | — | — |
| 2012 | 75° | 46° | 61° | — | — |
| 2011 | 83° | 55° | 69° | — | — |
| 2010 | 78° | 53° | 66° | — | — |
| 2009 | 78° | 54° | 66° | — | — |
| 2008 | 90° | 60° | 75° | — | — |
| 2007 | 66° | 46° | 56° | 0.97" | — |
| 2006 | 79° | 61° | 70° | — | — |
| 2005 | 80° | 65° | 72° | 4.22" | — |
| 2004 | 82° | 53° | 68° | 0.76" | — |
| 2003 | 82° | 54° | 68° | — | — |
| 2002 | 74° | 51° | 62° | — | — |
| 2001 | 75° | 57° | 66° | 2.34" | — |
| 2000 | 75° | 56° | 65° | — | — |
| 1999 | 66° | 55° | 61° | 0.18" | — |
| 1998 | 70° | 55° | 62° | — | — |
| 1997 | 68° | 49° | 58° | — | — |
| 1996 | 80° | 51° | 66° | — | — |
| 1995 | 84° | 71° | 78° | — | — |
| 1994 | 71° | 64° | 68° | 2.01" | — |
| 1993 | 81° | 64° | 72° | — | — |
| 1992 | 76° | 52° | 64° | 0.41" | — |
| 1991 | 68° | 58° | 63° | 0.64" | — |
| 1990 | 77° | 64° | 71° | 1.83" | — |
| 1989 | 80° | 46° | 63° | — | — |
| 1988 | 70° | 65° | 67° | 0.03" | — |
| 1987 | 77° | 55° | 66° | — | — |
| 1986 | 73° | 53° | 63° | — | — |
| 1985 | 70° | 53° | 61° | — | — |
| 1984 | 78° | 60° | 69° | — | — |
| 1983 | 82° | 65° | 73° | — | — |
| 1982 | 82° | 54° | 68° | — | — |
| 1981 | 75° | 45° | 60° | — | — |
| 1980 | 80° | 62° | 71° | — | — |
| 1979 | 76° | 61° | 68° | — | — |
| 1978 | 85° | 65° | 75° | 1.37" | — |
| 1977coldest | 70° | 43° | 56° | — | — |
| 1976 | 84° | 57° | 71° | — | — |
| 1975 | 73° | 49° | 61° | — | — |
| 1974 | 81° | 58° | 69° | 0.08" | — |
| 1973 | 87° | 60° | 74° | 0.86" | — |
| 1972warmest | 89° | 67° | 78° | 0.69" | — |
| 1971 | 83° | 55° | 69° | — | — |
55 years of data from GREEN BAY