Ann Arbor weather in May: Ann Arbor, Michigan: normal highs, lows, rain and records for May
Ann Arbor in May has a normal high of 70°F and a normal low of 46°F, a daily mean of 58°F, rising from 65°F on the 1st to 75°F by the 31st. Measurable precipitation falls on 14 days in a normal May, 3.35 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 21°C and low of 8°C, 85 mm of precipitation in May.
- NOAA stationAnn Arbor Municipal Airport
- Station IDUSW00094889
- Location42.22°N 83.74°W
- Elevation839 ft (256 m)
- From the center4 miles
- Population122,925
- Jan 32° 15°
- Feb 35° 16°
- Mar 45° 25°
- Apr 59° 35°
- May 70° 46°
- Jun 79° 54°
- Jul 84° 57°
- Aug 81° 57°
- Sep 74° 48°
- Oct 62° 38°
- Nov 48° 30°
- Dec 36° 22°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Ann Arbor in May?
The normal high is 70°F and the normal low 46°F, for a daily mean of 57.8°F. May is 10.8°F warmer than April and 8.6°F cooler than June. May is the 5th warmest month of the year in Ann Arbor and the 2nd wettest. Across the month the normal high rises 10°F, from 65°F on May 1 to 75°F on May 31. From one year to the next May's mean temperature typically moves about 3.4°F either way (NOAA's standard deviation), so roughly two Mays in three average between 54°F and 61°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 44%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 65°F | 40°F | 43% | 24% |
| May 8 | 68°F | 43°F | 44% | 24% |
| May 15 | 70°F | 45°F | 44% | 24% |
| May 22 | 72°F | 48°F | 43% | 23% |
| May 31 | 75°F | 51°F | 41% | 22% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 65°F | 40°F | 43% | 24% | 14 h |
| May 2 | 65°F | 41°F | 43% | 24% | 14 h |
| May 3 | 66°F | 41°F | 44% | 24% | 14 h 10 min |
| May 4 | 66°F | 41°F | 44% | 24% | 14 h 10 min |
| May 5 | 66°F | 42°F | 44% | 24% | 14 h 10 min |
| May 6 | 67°F | 42°F | 44% | 24% | 14 h 10 min |
| May 7 | 67°F | 43°F | 44% | 24% | 14 h 20 min |
| May 8 | 68°F | 43°F | 44% | 24% | 14 h 20 min |
| May 9 | 68°F | 43°F | 44% | 24% | 14 h 20 min |
| May 10 | 68°F | 44°F | 44% | 24% | 14 h 20 min |
| May 11 | 69°F | 44°F | 44% | 24% | 14 h 20 min |
| May 12 | 69°F | 44°F | 44% | 24% | 14 h 30 min |
| May 13 | 69°F | 45°F | 44% | 24% | 14 h 30 min |
| May 14 | 70°F | 45°F | 44% | 24% | 14 h 30 min |
| May 15 | 70°F | 45°F | 44% | 24% | 14 h 30 min |
| May 16 | 70°F | 46°F | 44% | 24% | 14 h 30 min |
| May 17 | 71°F | 46°F | 44% | 24% | 14 h 40 min |
| May 18 | 71°F | 46°F | 43% | 24% | 14 h 40 min |
| May 19 | 71°F | 47°F | 43% | 24% | 14 h 40 min |
| May 20 | 72°F | 47°F | 43% | 23% | 14 h 40 min |
| May 21 | 72°F | 47°F | 43% | 23% | 14 h 40 min |
| May 22 | 72°F | 48°F | 43% | 23% | 14 h 50 min |
| May 23 | 72°F | 48°F | 43% | 23% | 14 h 50 min |
| May 24 | 73°F | 48°F | 42% | 23% | 14 h 50 min |
| May 25 | 73°F | 49°F | 42% | 23% | 14 h 50 min |
| May 26 | 73°F | 49°F | 42% | 23% | 14 h 50 min |
| May 27 | 74°F | 49°F | 42% | 23% | 14 h 50 min |
| May 28 | 74°F | 50°F | 42% | 22% | 15 h |
| May 29 | 74°F | 50°F | 42% | 22% | 15 h |
| May 30 | 75°F | 50°F | 41% | 22% | 15 h |
| May 31 | 75°F | 51°F | 41% | 22% | 15 h |
- Normal high
- 70°FMay average
- Normal low
- 46°FMay average
- Precipitation
- 3.35 inmonth total
- Days with precipitation
- 140.01 inch or more
- Nights at 32°F or colder
- 3
- Daylight
- 14 h to 15 hMay 1 to May 31
- Days at 70°F or more
- 16
- Days at 80°F or more
- 6
- Sunshine
- 70%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094889; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Ann Arbor in May?
On a given May day the chance of 0.01 inch or more is 43% on average, highest around May 10 (44%). In all, 3.35 in falls on 14 days of a normal May, 1 of them with an inch or more.
In a normal May in Ann Arbor, 3 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094889.
What are the records for May in Ann Arbor?
The warmest May temperature on this station's record (since 1998) is 93°F, on May 28, 2012; the coldest is 21°F, on May 4, 2005. The wettest May brought 7.26 in (2010).
The May mean against the 1991-2020 normal of 57.8°F: 2021 54.7°F (−3.1), 2022 60.5°F (+2.7), 2023 56.4°F (−1.4), 2024 61.9°F (+4.1), 2025 56.4°F (−1.4), 2026 55.8°F (−2.0). 2 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 54.7°F | −3.1°F | 2.39 in |
| 2022 | 60.5°F | +2.7°F | 3.11 in |
| 2023 | 56.4°F | −1.4°F | 0.99 in |
| 2024 | 61.9°F | +4.1°F | 3.51 in |
| 2025 | 56.4°F | −1.4°F | 4.45 in |
| 2026 | 55.8°F | −2.0°F | 2.31 in |
Source: records: ACIS, station USW00094889; recent months: ACIS, station USW00094889. Records and recent months use complete months only.
How does May in Ann Arbor compare across Michigan?
Across the 140 places PlainClimate covers in Michigan, May normal highs run from 57°F in Harrisville to 73°F in Eau Claire; Ann Arbor's is 70°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.