Moline weather in September

In September, Moline sees average daytime highs of 75°F and overnight lows near 56°F, with 3.4 in of rain across 8.3 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 79°F in the first days to 70°F by the end. The sky is clear or mostly clear about 46% 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 Moline's 1st-clearest and 9th-windiest month. For the whole year in context, see Moline's year-round climate.

Daytime high
75°
4th warmest
Overnight low
56°
9th coldest
Rainfall
3.4 in
8.3 wet days
Daylight
12 h 18 min
5:48 AM – 6:05 PM
Cloud cover
47%
1st clearest
Wind
7 mph
9th windiest
Solar energy
4.57 kWh/m²
Travel score
7.2
out of 10

Moline is city in Rock Island County, Illinois, United States.

Density
989/km²
people per km²
Founded
1848

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 79°F in the first days to 70°F by the end.

A typical September day in Moline reaches about 75°F in the afternoon and slips back to 56°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 64°F and 85°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)
18061
28061
37961
47960
57960
67860
77859
87859
97758
107758
117758
127657
137657
147656
157556
167556
177455
187455
197454
207354
217353
227353
237253
247252
257152
267151
277151
287051
297050
306950

How September really feels in Moline

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.

Moline weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan30° / 16°1.87.65.39.30.0
Feb35° / 20°1.96.64.210.30.0
Mar48° / 31°2.89.52.411.71.7
Apr60° / 42°4.2120.813.14.6
May71° / 53°4.712.9014.36.1
Jun80° / 63°4.711.9014.96.2
Jul83° / 66°3.610.2014.75.8
Aug81° / 64°3.59.2013.76.6
Sep75° / 56°3.48.3012.37.2
Oct62° / 44°2.78.50.210.95.5
Nov48° / 32°2.47.81.29.71.7
Dec35° / 22°2.17.249.10.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 40%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16238
26238
36337
46337
56337
66337
76436
86436
96337
106238
116238
126139
136040
145941
155941
165842
175842
185842
195842
205842
215743
225743
235743
245743
255842
265842
275842
285842
295842
305743

Chance of precipitation in September

Any precipitation

Moline gets around 3.4 in of rain over 8.3 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 28% and peaks near 29% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
128
228
328
428
528
628
728
828
928
1029
1129
1229
1329
1429
1529
1629
1729
1829
1928
2028
2128
2228
2327
2427
2527
2627
2727
2827
2926
3026

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 48% of days. Sticky, muggy-or-worse air turns up on roughly 15% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
12025222310
2222522229
3242622218
4262621208
5282621187
6302620176
7322620176
8342619165
9362618155
10382518154
11402517144
12422417143
13442416133
14462315133
15472315123
16492314122
17522213112
18522213112
19562112101
20572111101
2159201191
2260201091
2362191081
246618970
256618970
266817960
277116850
287116850
297315840
307415740

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
167calm
177light breeze
187light 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 5:32 AM to 6:03 AM, and sunset from 6:31 PM to 5:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:326:31
212.95:346:29
312.95:356:28
412.85:366:26
512.85:376:24
612.75:386:22
712.75:396:21
812.75:406:19
912.65:416:17
1012.65:426:15
1112.55:436:14
1212.55:446:12
1312.45:456:10
1412.45:466:08
1512.35:476:06
1612.35:486:05
1712.25:496:03
1812.25:506:01
1912.15:515:59
2012.15:525:57
2112.05:535:56
2212.05:555:54
2311.95:565:52
2411.95:575:50
2511.85:585:48
2611.85:595:47
2711.86:005:45
2811.76:015:43
2911.76:025:41
3011.66:035:40

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.57 kWh/m².

For context, solar energy here swings from a low near 1.7 kWh/m² to a high of 6.38 kWh/m² in June across the year — September's 4.57 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.0Bright
55.0Bright
65.0Bright
74.9Bright
84.9Bright
94.8Bright
104.8Bright
114.7Bright
124.7Bright
134.7Bright
144.6Bright
154.6Bright
164.5Bright
174.5Bright
184.4Bright
194.4Bright
204.3Bright
214.3Bright
224.3Bright
234.2Bright
244.2Bright
254.1Bright
264.1Bright
274.0Bright
284.0Bright
294.0Moderate
303.9Moderate
Planning a trip in September

Is September a good time to visit Moline?

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

7.2
Sightseeing
1st-best month of the year
5.8
Beach & pool
4th-best month of the year

September is one of the better times to visit Moline for general sightseeing.

What to pack for Moline in September

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

In September, Moline sees daytime highs around 75°F and nights near 56°F. Worth packing: light clothes, rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

UV index in Moline 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 Moline peaks around June 18 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 highHighModerateLowJun 18UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul8Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov3Moderate
Dec2Low

Air quality in Moline 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 Moline is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodJul 1916 µg/m³Oct 228 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar13Moderate
Apr11Good
May13Moderate
Jun13Moderate
Jul16Moderate
Aug15Moderate
Sep11Good
Oct7Good
Nov8Good
Dec9Good
Location & terrain

Where is Moline?

Moline sits at 41.5°N, 90.5°W, 577 ft above sea level, in United States. The nearest listed city is Bettendorf, 1.2 mi away.

Topography around Moline

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

Within 2 miles, the terrain around Moline has only modest variations in elevation — a maximum elevation change of 200 ft around an average of 636 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 361 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 568 ft.

The land around Moline is covered by trees (38%) and artificial surfaces (38%) within 2 miles, cropland (33%) and trees (30%) within 10 miles, and cropland (74%) within 50 miles.

2 miles
200 ft
10 miles
361 ft
50 miles
568 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Bettendorf 1.2 mi · Rock Island 3.1 mi · Davenport 3.7 mi · East Moline 3.7 mi · Muscatine 28 mi · Clinton 29 mi · Galesburg 39 mi · Sterling 47 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 Moline (41.5067°, -90.5151°, elevation 577 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).