Burlington weather in September

In September, Burlington sees average daytime highs of 76°F and overnight lows near 57°F, with 3.6 in of rain across 7.9 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 81°F in the first days to 72°F by the end. The sky is clear or mostly clear about 48% 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 Burlington's 1st-clearest and 9th-windiest month. For the whole year in context, see Burlington's year-round climate.

Daytime high
76°
4th warmest
Overnight low
57°
9th coldest
Rainfall
3.6 in
7.9 wet days
Daylight
12 h 18 min
5:51 AM – 6:07 PM
Cloud cover
46%
1st clearest
Wind
7 mph
9th windiest
Solar energy
4.68 kWh/m²
Travel score
7.3
out of 10

Burlington is city in Des Moines County, Iowa, United States.

Density
644/km²
people per km²
Founded
1833

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 81°F in the first days to 72°F by the end.

A typical September day in Burlington reaches about 76°F in the afternoon and slips back to 57°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 66°F and 87°F. Set against its neighbours, September runs about 6°F cooler than August and about 13°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18162
28162
38162
48061
58061
68061
78060
87960
97959
107859
117859
127858
137758
147757
157757
167657
177656
187656
197555
207555
217555
227454
237454
247453
257353
267353
277352
287252
297251
307151

How September really feels in Burlington

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.

Burlington weather by month

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

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan33° / 18°1.87.44.79.40.0
Feb37° / 21°2.06.93.810.40.0
Mar50° / 32°2.99.92.311.72.2
Apr62° / 43°4.411.90.613.15.0
May72° / 54°4.613014.26.2
Jun82° / 64°4.611.6014.96.0
Jul85° / 67°3.19.5014.65.5
Aug83° / 65°3.39013.66.1
Sep76° / 57°3.67.9012.37.3
Oct64° / 45°2.88.10.210.96.0
Nov49° / 33°2.67.71.19.72.3
Dec38° / 23°2.16.93.39.10.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 39%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16436
26436
36436
46535
56535
66535
76535
86436
96436
106337
116238
126139
136139
145941
155941
165842
175743
185743
195644
205743
215842
225842
235842
245941
255941
265941
276040
285941
296040
306040

Chance of precipitation in September

Any precipitation

Burlington gets around 3.6 in of rain over 7.9 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 27% and peaks near 29% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
127
227
327
427
527
627
727
828
928
1028
1128
1229
1329
1429
1529
1629
1729
1828
1928
2027
2127
2226
2326
2425
2525
2625
2724
2824
2924
3023

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 45% of days. Sticky, muggy-or-worse air turns up on roughly 18% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11723222711
21923222610
3212422249
4222422238
5242522227
6262522216
7282521206
8312521195
9332420184
10352420174
11372419173
12392319163
13412318163
14432217152
15452216152
16472115142
17492115142
18512114131
19542013121
20552012121
21571912111
22591911101
2361181191
2464181080
2564181080
2666171070
276817960
286917950
297016950
307216840

Wind in September

Winds average 7 mph in September.

Across September, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167light breeze
177light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze

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 5:36 AM to 6:05 AM, and sunset from 6:33 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:366:33
212.95:376:31
312.95:386:29
412.85:396:28
512.85:406:26
612.75:416:24
712.75:426:23
812.65:436:21
912.65:446:19
1012.55:456:17
1112.55:466:16
1212.55:476:14
1312.45:486:12
1412.45:496:10
1512.35:506:09
1612.35:516:07
1712.25:526:05
1812.25:536:03
1912.15:546:01
2012.15:556:00
2112.05:565:58
2212.05:575:56
2311.95:585:54
2411.95:595:53
2511.86:005:51
2611.86:015:49
2711.86:025:47
2811.76:035:46
2911.76:045:44
3011.66:055:42

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.68 kWh/m².

For context, solar energy here swings from a low near 1.78 kWh/m² to a high of 6.41 kWh/m² in July across the year — September's 4.68 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.1Bright
55.1Bright
65.0Bright
75.0Bright
85.0Bright
94.9Bright
104.9Bright
114.8Bright
124.8Bright
134.8Bright
144.7Bright
154.7Bright
164.6Bright
174.6Bright
184.5Bright
194.5Bright
204.5Bright
214.4Bright
224.4Bright
234.3Bright
244.3Bright
254.3Bright
264.2Bright
274.2Bright
284.1Bright
294.1Bright
304.0Bright
Planning a trip in September

Is September a good time to visit Burlington?

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

7.3
Sightseeing
1st-best month of the year
6.3
Beach & pool
4th-best month of the year

September is one of the better times to visit Burlington for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Burlington in September

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

In September, Burlington sees daytime highs around 76°F and nights near 57°F. Worth packing: light clothes and sun protection. About 8 days see rain.

light clothessun protection

UV index in Burlington in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Burlington peaks around June 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 19UV 9Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun10Very high
Jul9Very high
Aug8Very high
Sep7High
Oct3Moderate
Nov3Moderate
Dec2Low

Air quality in Burlington 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 Burlington is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodJul 1815 µg/m³Oct 227 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar12Good
Apr10Good
May13Moderate
Jun13Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct7Good
Nov8Good
Dec9Good
Location & terrain

Where is Burlington?

Burlington sits at 40.8°N, 91.1°W, 607 ft above sea level, in United States. The nearest listed city is Macomb, 34 mi away.

Topography around Burlington

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

Within 2 miles, the terrain around Burlington has only modest variations in elevation — a maximum elevation change of 243 ft around an average of 633 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 272 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 443 ft.

The land around Burlington is covered by trees (34%) and artificial surfaces (26%) within 2 miles, cropland (47%) and trees (31%) within 10 miles, and cropland (64%) and trees (24%) within 50 miles.

2 miles
243 ft
10 miles
272 ft
50 miles
443 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Macomb 34 mi · Galesburg 40 mi · Muscatine 43 mi · Rock Island 56 mi · Davenport 57 mi · Moline 57 mi · Bettendorf 58 mi · East Moline 59 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 Burlington (40.8075°, -91.1129°, elevation 607 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. 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).