Kalamazoo weather in September

In September, Kalamazoo sees average daytime highs of 73°F and overnight lows near 54°F, with 3.1 in of rain across 9.7 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 77°F in the first days to 68°F by the end. The sky is clear or mostly clear about 36% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Kalamazoo's 1st-clearest and 9th-windiest month. For the whole year in context, see Kalamazoo's year-round climate.

Daytime high
73°
4th warmest
Overnight low
54°
9th coldest
Rainfall
3.1 in
9.7 wet days
Daylight
12 h 18 min
6:28 AM – 6:45 PM
Cloud cover
54%
1st clearest
Wind
7 mph
9th windiest
Solar energy
4.32 kWh/m²
Travel score
6.8
out of 10

Kalamazoo is county seat of Kalamazoo County, Michigan, United States.

Density
1,170/km²
people per km²
Founded
1829

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 77°F in the first days to 68°F by the end.

A typical September day in Kalamazoo reaches about 73°F in the afternoon and slips back to 54°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 62°F and 83°F. Set against its neighbours, September runs about 7°F cooler than August and about 13°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
17859
27758
37758
47758
57658
67657
77657
87556
97556
107556
117455
127455
137455
147354
157354
167354
177253
187253
197152
207152
217152
227051
237051
246950
256950
266850
276849
286849
296748
306748

How September really feels in Kalamazoo

Once humidity and wind are folded in, September 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

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

Kalamazoo weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan31° / 19°2.811.310.49.30.0
Feb34° / 20°2.28.36.610.30.0
Mar45° / 28°2.710.24.411.61.0
Apr57° / 39°3.912.71.413.13.8
May68° / 49°4.413.1014.45.8
Jun78° / 59°4.311.70156.4
Jul81° / 63°4.011.4014.86.3
Aug79° / 61°3.811.1013.76.6
Sep73° / 54°3.19.7012.36.8
Oct60° / 43°3.4110.210.84.6
Nov46° / 33°2.810.139.61.3
Dec36° / 25°2.5117.990.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 47%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15743
25644
35644
45644
55743
65743
75644
85644
95545
105545
115545
125446
135347
145347
155248
165248
175248
185248
195248
205149
215149
225149
235149
245149
255149
265050
275050
285050
295149
305149

Chance of precipitation in September

Any precipitation

Kalamazoo gets around 3.1 in of rain over 9.7 wet days in September. 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 37% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
131
231
331
431
531
632
732
832
932
1032
1132
1232
1333
1433
1532
1632
1732
1832
1932
2032
2133
2233
2334
2434
2535
2636
2737
2837
2937
3037

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 53% of days. Sticky, muggy-or-worse air turns up on roughly 10% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1282622204
2292621194
3312721183
4332720173
5352720163
6362719152
7382719142
8402719132
9412619122
10432618111
11452618101
1247251891
1348241891
1450241781
1551231781
1654221671
1756211571
1858211560
1960201460
2062191360
2164191250
2266181150
2368171050
246917950
257216840
267316740
277415740
287515640
297614640
307714630

Wind in September

Winds average 7 mph in September.

Across September, 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.

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over September. Sunrise moves from 6:12 AM to 6:44 AM, and sunset from 7:12 PM to 6:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.06:127:12
213.06:137:10
312.96:147:09
412.96:157:07
512.86:167:05
612.86:177:03
712.76:187:02
812.76:207:00
912.66:216:58
1012.66:226:56
1112.56:236:54
1212.56:246:52
1312.46:256:51
1412.46:266:49
1512.36:276:47
1612.36:286:45
1712.26:296:43
1812.26:306:41
1912.16:326:40
2012.16:336:38
2112.06:346:36
2212.06:356:34
2311.96:366:32
2411.96:376:30
2511.86:386:29
2611.86:396:27
2711.76:406:25
2811.76:416:23
2911.66:436:21
3011.66:446:20

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.32 kWh/m².

For context, solar energy here swings from a low near 1.4 kWh/m² to a high of 6.36 kWh/m² in June across the year — September's 4.32 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.8Bright
44.8Bright
54.7Bright
64.7Bright
74.7Bright
84.6Bright
94.6Bright
104.5Bright
114.5Bright
124.4Bright
134.4Bright
144.3Bright
154.3Bright
164.3Bright
174.2Bright
184.2Bright
194.1Bright
204.1Bright
214.1Bright
224.0Bright
234.0Moderate
243.9Moderate
253.9Moderate
263.8Moderate
273.8Moderate
283.8Moderate
293.7Moderate
303.7Moderate
Planning a trip in September

Is September a good time to visit Kalamazoo?

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

6.8
Sightseeing
1st-best month of the year
4.9
Beach & pool
4th-best month of the year

September is a reasonable time to visit Kalamazoo for sightseeing.

What to pack for Kalamazoo in September

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

In September, Kalamazoo sees daytime highs around 73°F and nights near 54°F. Worth packing: light clothes and rain gear. About 10 days see rain.

light clothesrain gear

Sea temperature near Kalamazoo in September

The nearest coast averages about 68°F in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 40 mi away) is warmest in August at about 72°F and coldest in March near 36°F.

It's comfortable for a long swim from Jul 14 to Sep 13 — about 2 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan39Bracing
Feb37Bracing
Mar36Bracing
Apr39Bracing
May45Bracing
Jun58Bracing
Jul69Refreshing
Aug72Refreshing
Sep68Cool
Oct59Bracing
Nov49Bracing
Dec43Bracing

UV index in Kalamazoo in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kalamazoo peaks around June 22 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 22UV 9Dec 21UV 1
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr6High
May7High
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Kalamazoo in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Kalamazoo is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1515 µg/m³Oct 228 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar13Moderate
Apr12Moderate
May14Moderate
Jun15Moderate
Jul16Moderate
Aug15Moderate
Sep11Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Kalamazoo?

Kalamazoo sits at 42.3°N, 85.6°W, 784 ft above sea level, in United States. The nearest listed city is Portage, 6.2 mi away.

Topography around Kalamazoo

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

Within 2 miles, the terrain around Kalamazoo has only modest variations in elevation — a maximum elevation change of 236 ft around an average of 830 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 397 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 617 ft.

The land around Kalamazoo is covered by trees (50%) and artificial surfaces (36%) within 2 miles, trees (57%) within 10 miles, and trees (42%) and cropland (35%) within 50 miles.

2 miles
236 ft
10 miles
397 ft
50 miles
617 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Portage 6.2 mi · Battle Creek 21 mi · Kentwood 40 mi · Holland 43 mi · Wyoming 43 mi · Grandville 43 mi · Jenison 43 mi · Granger 46 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 Kalamazoo (42.2917°, -85.5872°, elevation 784 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).