Ypsilanti weather in August

In August, Ypsilanti sees average daytime highs of 80°F and overnight lows near 62°F, with 3.2 in of rain across 10.2 wet days and about 13.7 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 81°F in the first days to 79°F by the end. The sky is clear or mostly clear about 31% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 14 h 18 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Ypsilanti's 3rd-clearest and 12th-windiest month. For the whole year in context, see Ypsilanti's year-round climate.

Daytime high
80°
2nd warmest
Overnight low
62°
11th coldest
Rainfall
3.2 in
10.2 wet days
Daylight
13 h 42 min
5:47 AM – 7:30 PM
Cloud cover
57%
3rd clearest
Wind
6 mph
12th windiest
Solar energy
5.37 kWh/m²
Travel score
6.6
out of 10

Ypsilanti is city in Washtenaw County, Michigan, United States.

Density
1,704/km²
people per km²
Founded
1823

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 81°F in the first days to 79°F by the end.

A typical August day in Ypsilanti reaches about 80°F in the afternoon and slips back to 62°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 72°F and 87°F. Set against its neighbours, August runs about 2°F cooler than July and about 7°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18264
28264
38163
48163
58163
68163
78163
88163
98163
108163
118063
128063
138062
148062
158062
168062
178062
188062
198062
208062
218062
227962
237962
247961
257961
267961
277961
287961
297960
307860
317860

How August really feels in Ypsilanti

Once humidity and wind are folded in, August 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

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

Ypsilanti weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan32° / 19°2.49.65.89.30.0
Feb35° / 20°2.085.410.30.0
Mar45° / 28°2.59.83.611.61.0
Apr57° / 39°3.611.71.213.13.9
May69° / 50°3.812.7014.45.9
Jun78° / 60°3.610.70156.5
Jul82° / 64°3.311.2014.86.1
Aug80° / 62°3.210.2013.76.6
Sep73° / 54°2.78.8012.37.0
Oct61° / 43°2.690.210.85.0
Nov47° / 34°2.68.91.69.61.6
Dec37° / 25°2.38.84.590.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15347
25347
35347
45347
55347
65347
75347
85248
95149
105149
115149
125149
135050
145149
155050
165050
175149
185149
195050
205149
215149
225149
235149
245248
255347
265347
275446
285545
295545
305545
315545

Chance of precipitation in August

Any precipitation

Ypsilanti gets around 3.2 in of rain over 10.2 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 33% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
235
334
434
534
634
734
834
934
1034
1134
1234
1334
1434
1534
1634
1734
1834
1934
2033
2133
2233
2332
2432
2531
2630
2730
2829
2929
3029
3129

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the comfortable band about 26% of days. Sticky, muggy-or-worse air turns up on roughly 28% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1182528227
2192528227
3192527227
4192527227
5192527227
6202527226
7202527226
8202526226
9212526226
10212526236
11212525236
12212525236
13212625236
14212625235
15212624235
16212624245
17212624244
18202724244
19202625254
20202625254
21202625254
22202625254
23212625253
24212625253
25222625253
26222624253
27232624243
28242624243
29252623233
30262623223
31272623223

Wind in August

Winds average 6 mph in August, the calmest month.

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

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
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 August

DaylightNight

Daylight runs from about 14 h 18 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over August. Sunrise moves from 5:31 AM to 6:03 AM, and sunset from 7:50 PM to 7:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.35:317:50
214.35:327:49
314.25:337:48
414.25:347:47
514.25:357:45
614.15:367:44
714.15:377:43
814.15:387:42
914.05:397:40
1014.05:407:39
1113.95:417:38
1213.95:427:36
1313.95:447:35
1413.85:457:33
1513.85:467:32
1613.75:477:30
1713.75:487:29
1813.65:497:27
1913.65:507:26
2013.65:517:24
2113.55:527:23
2213.55:537:21
2313.45:547:19
2413.45:557:18
2513.35:577:16
2613.35:587:14
2713.25:597:13
2813.26:007:11
2913.16:017:09
3013.16:027:08
3113.06:037:06

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.37 kWh/m².

For context, solar energy here swings from a low near 1.45 kWh/m² to a high of 6.36 kWh/m² in June across the year — August's 5.37 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.8Bright
35.8Bright
45.8Bright
55.7Bright
65.7Bright
75.7Bright
85.6Bright
95.6Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.4Bright
155.4Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.1Bright
255.1Bright
265.1Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
314.9Bright
Planning a trip in August

Is August a good time to visit Ypsilanti?

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

6.6
Sightseeing
2nd-best month of the year
6.5
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Ypsilanti for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Ypsilanti in August

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

In August, Ypsilanti sees daytime highs around 80°F and nights near 62°F. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Ypsilanti in August

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

The sea at the nearest coast (about 28 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 Ypsilanti in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ypsilanti 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 Ypsilanti in August

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Ypsilanti is worst in July — around 16 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1216 µg/m³Oct 239 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar14Moderate
Apr14Moderate
May15Moderate
Jun16Moderate
Jul16Moderate
Aug15Moderate
Sep12Moderate
Oct9Good
Nov9Good
Dec10Good
Location & terrain

Where is Ypsilanti?

Ypsilanti sits at 42.2°N, 83.6°W, 719 ft above sea level, in United States. The nearest listed city is Ann Arbor, 6.8 mi away.

Topography around Ypsilanti

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

Within 2 miles, the terrain around Ypsilanti has only modest variations in elevation — a maximum elevation change of 203 ft around an average of 761 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 509 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 945 ft.

The land around Ypsilanti is covered by trees (52%) and artificial surfaces (26%) within 2 miles, trees (47%) and grassland (23%) within 10 miles, and trees (37%) and cropland (28%) within 50 miles.

2 miles
203 ft
10 miles
509 ft
50 miles
945 ft
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Ann Arbor 6.8 mi · Canton 8.1 mi · Romulus 11 mi · Wayne 12 mi · Westland 12 mi · Garden City 16 mi · Inkster 16 mi · Livonia 16 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 Ypsilanti (42.2411°, -83.613°, elevation 719 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).