Ann Arbor weather in July

In July, Ann Arbor sees average daytime highs of 82°F and overnight lows near 63°F, with 3.3 in of rain across 10.8 wet days and about 14.8 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 82°F through the month. The sky is clear or mostly clear about 31% of the time in July, and the air most often feels humid.

Daylight stretches from about 15 h 06 min at the start of July to 14 h 24 min by month's end. Set against the rest of the year, July is Ann Arbor's 2nd-clearest and 11th-windiest month. For the whole year in context, see Ann Arbor's year-round climate.

Daytime high
82°
1st warmest
Overnight low
63°
12th coldest
Rainfall
3.3 in
10.8 wet days
Daylight
14 h 48 min
5:16 AM – 8:05 PM
Cloud cover
56%
2nd clearest
Wind
6 mph
11th windiest
Solar energy
6.23 kWh/m²
Travel score
6.3
out of 10

Ann Arbor is county seat of Washtenaw County, Michigan, United States.

Density
1,561/km²
people per km²
Founded
1824

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 82°F through the month.

A typical July day in Ann Arbor reaches about 82°F in the afternoon and slips back to 63°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 74°F and 89°F. Set against its neighbours, July runs about 4°F warmer than June and about 2°F warmer than August.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18162
28162
38162
48162
58163
68163
78263
88263
98263
108263
118263
128263
138263
148264
158264
168264
178264
188264
198264
208264
218264
228264
238264
248264
258264
268263
278163
288163
298163
308163
318163

How July really feels in Ann Arbor

Once humidity and wind are folded in, July averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

July sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Ann Arbor weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan31° / 19°2.49.76.19.30.0
Feb34° / 20°2.18.25.610.30.0
Mar45° / 28°2.59.73.611.61.0
Apr57° / 39°3.611.81.313.13.9
May68° / 49°3.912.5014.45.9
Jun78° / 59°3.710.50156.6
Jul82° / 63°3.310.8014.86.3
Aug80° / 61°3.310.3013.76.6
Sep73° / 54°2.78.6012.36.9
Oct60° / 43°2.79.30.210.84.9
Nov47° / 33°2.691.99.61.5
Dec36° / 25°2.394.690.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 23% of July, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15545
25644
35644
45545
55545
65545
75545
85644
95644
105545
115545
125545
135545
145446
155446
165446
175347
185347
195347
205347
215347
225248
235248
245248
255248
265248
275248
285248
295248
305347
315347

Chance of precipitation in July

Any precipitation

Ann Arbor gets around 3.3 in of rain over 10.8 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 35% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
235
335
434
534
634
733
833
933
1034
1134
1234
1335
1435
1535
1635
1735
1836
1936
2036
2136
2237
2337
2437
2537
2636
2736
2836
2935
3035
3135

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

Most of July feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, July lands in the humid band about 26% of days. Sticky, muggy-or-worse air turns up on roughly 30% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1262324234
2262324225
3262424225
4262424225
5252424225
6252424216
7252424216
8242424216
9242325216
10232325227
11232326227
12222226227
13212226237
14212227238
15202227238
16192128238
17192128238
18192128249
19182128249
20182128249
21172228249
22172228249
23162328249
24162328249
25162428239
26162428238
27162528238
28172528228
29172528227
30172528227
31182528217

Wind in July

Winds average 6 mph in July.

Across July, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 15 h 06 min at the start of July to 14 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over July. Sunrise moves from 5:07 AM to 5:30 AM, and sunset from 8:10 PM to 7:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.15:078:10
215.05:078:10
315.05:088:10
415.05:088:10
515.05:098:09
615.05:098:09
715.05:108:09
815.05:118:09
914.95:118:08
1014.95:128:08
1114.95:138:07
1214.95:138:07
1314.95:148:06
1414.95:158:06
1514.85:168:05
1614.85:168:05
1714.85:178:04
1814.85:188:03
1914.75:198:03
2014.75:208:02
2114.75:218:01
2214.65:228:00
2314.65:238:00
2414.65:237:59
2514.65:247:58
2614.55:257:57
2714.55:267:56
2814.55:277:55
2914.45:287:54
3014.45:297:53
3114.45:307:52

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.23 kWh/m².

For context, solar energy here swings from a low near 1.45 kWh/m² to a high of 6.3 kWh/m² in June across the year — July's 6.23 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.4Intense
86.4Intense
96.4Intense
106.4Intense
116.4Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.2Intense
186.2Intense
196.2Intense
206.1Intense
216.1Intense
226.1Intense
236.0Intense
246.0Intense
256.0Bright
266.0Bright
275.9Bright
285.9Bright
295.9Bright
305.8Bright
315.8Bright
Planning a trip in July

Is July a good time to visit Ann Arbor?

Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.3
Sightseeing
4th-best month of the year
6.6
Beach & pool
1st-best month of the year

July is a reasonable time to visit Ann Arbor for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Ann Arbor in July

From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In July, Ann Arbor sees daytime highs around 82°F and nights near 63°F. Pack light clothes and sun protection. Worth having: rain gear. About 11 days see rain.

light clothessun protectionrain gear

Sea temperature near Ann Arbor in July

The nearest coast averages about 75°F in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 34 mi away) is warmest in August at about 75°F and coldest in February near 33°F.

It's comfortable for a long swim from Jun 20 to Sep 20 — about 3.1 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan34Bracing
Feb33Bracing
Mar36Bracing
Apr44Bracing
May56Bracing
Jun67Cool
Jul75Refreshing
Aug75Warm
Sep70Refreshing
Oct58Bracing
Nov46Bracing
Dec38Bracing

UV index in Ann Arbor in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ann Arbor peaks around June 20 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 20UV 9Dec 20UV 1
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr6High
May7High
Jun9Very high
Jul9Very high
Aug7High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Ann Arbor in July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July falls, not just the annual average.

Air quality in Ann Arbor is worst in July — around 16 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1116 µg/m³Oct 238 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar14Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul16Moderate
Aug15Moderate
Sep12Good
Oct8Good
Nov9Good
Dec9Good
Location & terrain

Where is Ann Arbor?

Ann Arbor sits at 42.3°N, 83.7°W, 883 ft above sea level, in United States. The nearest listed city is Ypsilanti, 6.8 mi away.

Topography around Ann Arbor

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Ann Arbor.

Within 2 miles, the terrain around Ann Arbor has only modest variations in elevation — a maximum elevation change of 295 ft around an average of 883 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 436 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 945 ft.

The land around Ann Arbor is covered by trees (60%) and artificial surfaces (30%) within 2 miles, trees (49%) and grassland (24%) within 10 miles, and trees (40%) and cropland (29%) within 50 miles.

2 miles
295 ft
10 miles
436 ft
50 miles
945 ft
treesgrasslandcroplandartificial surfaceswater
July weather nearby: Ypsilanti 6.8 mi · Canton 14 mi · Westland 17 mi · Romulus 18 mi · Wayne 18 mi · Novi 19 mi · Livonia 21 mi · Garden City 21 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Ann Arbor (42.2776°, -83.7409°, elevation 883 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).