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Ann Arbor, MI Weather on May 15
May 15th in Ann Arbor, MI typically brings mild spring weather, with average highs around 69°F and lows near 47°F. Over 55 years of records, the warmest May 15th was in 1998 (73°F average), while the coldest was 2016 (40°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 56% of May 15th dates historically, with the wettest May 15th recording 2.21" of rain. The last decade has been 3.9°F warmer on this date compared to 20-30 years ago.
What to Expect on May 15
Planning for May 15th in Ann Arbor, MI? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
May 15 Weather Records for Ann Arbor
- •The all-time record high for May 15th in Ann Arbor, MI is 89°F, set in 1998.
- •The coldest May 15th on record dropped to 32°F in 2016.
- •A freeze (32°F or below) has occurred on May 15th in 2 of the last 55 years.
- •Last year (1971), May 15th was 10°F warmer than the long-term average.
Frequently Asked Questions
What was the warmest May 15 ever in Ann Arbor?
The warmest May 15 in Ann Arbor, MI reached 89°F in 1998. That is 20°F above the long-term average high of 69°F.
What was the coldest May 15 ever in Ann Arbor?
The coldest May 15 in Ann Arbor, MI dropped to 32°F in 2016. That is 15°F below the long-term average low of 47°F.
What is the average temperature on May 15 in Ann Arbor?
On May 15, Ann Arbor averages a high of 69°F and a low of 47°F based on 55 years of NOAA weather observations from ANN ARBOR 1W.
How many years of weather data are available for May 15 in Ann Arbor?
We have 55 years of weather records for May 15 in Ann Arbor, MI, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
May 15 Weather History in Ann Arbor
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 81°F | 55°F | 0.08" | -- |
| 2024 | 76°F | 54°F | 0.03" | -- |
| 2023 | 72°F | 40°F | 0" | -- |
| 2022 | 84°F | 49°F | 0.23" | -- |
| 2021 | 72°F | 35°F | 0" | -- |
| 2020 | 71°F | 50°F | 1.63" | -- |
| 2019 | 74°F | 36°F | 0" | -- |
| 2018 | 72°F | 56°F | 0.79" | -- |
| 2017 | 71°F | 36°F | 0" | -- |
| 2016 | 49°F | 32°F | 0.05" | -- |
| 2015 | 75°F | 50°F | 0.28" | -- |
| 2014 | 60°F | 41°F | 0.38" | -- |
| 2013 | 79°F | 47°F | 0" | -- |
| 2012 | 77°F | 44°F | 0" | -- |
| 2011 | 64°F | 49°F | 0.08" | -- |
| 2010 | 70°F | 43°F | 0" | -- |
| 2009 | 72°F | 42°F | 0" | -- |
| 2008 | 61°F | 41°F | 0" | -- |
| 2007 | 86°F | 57°F | 1.27" | -- |
| 2006 | 56°F | 51°F | 0.41" | -- |
| 2005 | 55°F | 39°F | 0" | -- |
| 2004 | 54°F | 47°F | 0" | -- |
| 2003 | 57°F | 49°F | 0.89" | -- |
| 2002 | 68°F | 37°F | 0" | -- |
| 2001 | 59°F | 53°F | 2.21" | -- |
| 2000 | 64°F | 32°F | 0" | -- |
| 1999 | 73°F | 54°F | 0" | -- |
| 1998 | 89°F | 57°F | 0" | -- |
| 1997 | 53°F | 41°F | 0.61" | -- |
| 1996 | 57°F | 47°F | 0.41" | -- |
| 1995 | 72°F | 50°F | 0" | -- |
| 1994 | 72°F | 56°F | 0.15" | -- |
| 1993 | 74°F | 57°F | 0.05" | -- |
| 1992 | 71°F | 39°F | 0" | -- |
| 1991 | 86°F | 56°F | 0" | -- |
| 1990 | 70°F | 50°F | 0.3" | -- |
| 1989 | 64°F | 45°F | 0" | -- |
| 1988 | 87°F | 46°F | 0" | -- |
| 1987 | 76°F | 46°F | 0.84" | -- |
| 1986 | 76°F | 52°F | 0.05" | -- |
| 1985 | 79°F | 57°F | 0.64" | -- |
| 1984 | 59°F | 34°F | 0.03" | -- |
| 1983 | 67°F | 45°F | 0.03" | -- |
| 1982 | 81°F | 59°F | 0" | -- |
| 1981 | 47°F | 43°F | 1.09" | -- |
| 1980 | 59°F | 41°F | 0.05" | -- |
| 1979 | 65°F | 49°F | 0.18" | -- |
| 1978 | 57°F | 50°F | 0.28" | -- |
| 1977 | 75°F | 44°F | 0" | -- |
| 1976 | 68°F | 61°F | 0.38" | -- |
| 1975 | 70°F | 54°F | 0.03" | -- |
| 1974 | 73°F | 53°F | 1.6" | -- |
| 1973 | 55°F | 35°F | 0" | -- |
| 1972 | 65°F | 53°F | 1.27" | -- |
| 1971 | 79°F | 48°F | 0" | -- |
Based on 55 years of data from NOAA station: ANN ARBOR 1W
Monthly Climate Averages
Historical temperature and precipitation averages for Ann Arbor, MI, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.