Weather on August 18
Ann Arbor, MI
55 Years of Data
Avg High
81°F
Avg Low
59°F
Warmest
1988
80°F avg
Coldest
2007
54°F avg
About This Date
August 18th in Ann Arbor, MI typically brings warm summer weather, with average highs around 81°F and lows near 59°F. Over 55 years of records, the warmest August 18th was in 1988 (80°F average), while the coldest was 2007 (54°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 38% of August 18th dates historically, with the wettest August 18th recording 4.11" of rain. The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
Planning for August 18th in Ann Arbor, MI? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 55° | 67° | — | — |
| 2024 | 81° | 65° | 73° | 0.13" | — |
| 2023 | 74° | 50° | 62° | — | — |
| 2022 | 83° | 50° | 66° | — | — |
| 2021 | 86° | 63° | 74° | — | — |
| 2020 | 77° | 50° | 64° | — | — |
| 2019 | 85° | 64° | 74° | 0.91" | — |
| 2018 | 85° | 66° | 75° | — | — |
| 2017 | 80° | 58° | 69° | — | — |
| 2016 | 83° | 59° | 71° | — | — |
| 2015 | 83° | 63° | 73° | — | — |
| 2014 | 80° | 61° | 70° | — | — |
| 2013 | 81° | 54° | 67° | — | — |
| 2012 | 75° | 46° | 61° | — | — |
| 2011 | 82° | 62° | 72° | 0.28" | — |
| 2010 | 82° | 59° | 71° | 0.03" | — |
| 2009 | 80° | 67° | 73° | 0.13" | — |
| 2008 | 81° | 63° | 72° | — | — |
| 2007coldest | 69° | 40° | 54° | 0.46" | — |
| 2006 | 81° | 66° | 73° | — | — |
| 2005 | 83° | 61° | 72° | — | — |
| 2004 | 77° | 54° | 65° | 0.03" | — |
| 2003 | 79° | 50° | 64° | 0.03" | — |
| 2002 | 79° | 53° | 66° | — | — |
| 2001 | 80° | 54° | 67° | 0.84" | — |
| 2000 | 76° | 61° | 68° | — | — |
| 1999 | 73° | 61° | 67° | — | — |
| 1998 | 85° | 66° | 75° | 0.86" | — |
| 1997 | 70° | 55° | 62° | 0.1" | — |
| 1996 | 85° | 57° | 71° | — | — |
| 1995 | 86° | 69° | 78° | 0.13" | — |
| 1994 | 81° | 58° | 69° | — | — |
| 1993 | 87° | 64° | 76° | — | — |
| 1992 | 74° | 54° | 64° | — | — |
| 1991 | 81° | 60° | 70° | 0.08" | — |
| 1990 | 82° | 69° | 76° | — | — |
| 1989 | 76° | 52° | 64° | — | — |
| 1988warmest | 94° | 67° | 80° | 4.11" | — |
| 1987 | 84° | 58° | 71° | 0.05" | — |
| 1986 | 83° | 61° | 72° | — | — |
| 1985 | 81° | 64° | 72° | 0.86" | — |
| 1984 | 83° | 63° | 73° | 0.33" | — |
| 1983 | 87° | 71° | 79° | 0.08" | — |
| 1982 | 80° | 53° | 67° | — | — |
| 1981 | 76° | 46° | 61° | — | — |
| 1980 | 82° | 62° | 72° | 0.05" | — |
| 1979 | 71° | 55° | 63° | 1.68" | — |
| 1978 | 85° | 64° | 74° | 0.05" | — |
| 1977 | 71° | 47° | 59° | — | — |
| 1976 | 85° | 54° | 69° | — | — |
| 1975 | 79° | 54° | 66° | — | — |
| 1974 | 83° | 60° | 71° | — | — |
| 1973 | 85° | 62° | 73° | — | — |
| 1972 | 86° | 70° | 78° | — | — |
| 1971 | 91° | 59° | 75° | — | — |
55 years of data from ANN ARBOR 1W