Owensboro weather in September

In September, Owensboro sees average daytime highs of 80°F and overnight lows near 61°F, with 3.5 in of rain across 7.9 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 84°F in the first days to 76°F by the end. The sky is clear or mostly clear about 47% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Owensboro's 1st-clearest and 10th-windiest month. For the whole year in context, see Owensboro's year-round climate.

Daytime high
80°
4th warmest
Overnight low
61°
9th coldest
Rainfall
3.5 in
7.9 wet days
Daylight
12 h 12 min
5:36 AM – 5:50 PM
Cloud cover
46%
1st clearest
Wind
6 mph
10th windiest
Solar energy
4.71 kWh/m²
Travel score
6.8
out of 10

Owensboro is county seat of Daviess County, Kentucky, United States.

Density
1,052/km²
people per km²
Founded
1797

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 84°F in the first days to 76°F by the end.

A typical September day in Owensboro reaches about 80°F in the afternoon and slips back to 61°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 71°F and 90°F. Set against its neighbours, September runs about 6°F cooler than August and about 11°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18567
28566
38466
48466
58465
68465
78364
88364
98364
108263
118263
128262
138162
148162
158161
168061
178060
188060
197960
207959
217959
227858
237858
247858
257757
267757
277756
287656
297655
307655

How September really feels in Owensboro

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.

Owensboro weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan43° / 28°3.89.82.39.70.5
Feb47° / 31°3.69.42.510.51.5
Mar57° / 39°4.711.6111.74.0
Apr68° / 49°5.111.6012.96.0
May77° / 59°4.712.30146.4
Jun84° / 68°3.811.1014.65.3
Jul87° / 71°3.510.3014.34.7
Aug86° / 69°3.08.1013.55.2
Sep80° / 61°3.57.9012.36.8
Oct69° / 49°3.78.10116.8
Nov56° / 39°3.890.6104.0
Dec46° / 32°4.410.61.99.41.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 38%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16040
26040
36040
46139
56139
66238
76238
86238
96238
106337
116337
126238
136238
146238
156238
166139
176238
186238
196238
206238
216238
226238
236337
246337
256436
266436
276535
286535
296535
306535

Chance of precipitation in September

Any precipitation

Owensboro gets around 3.5 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 26% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
126
226
326
426
526
626
725
825
925
1024
1124
1224
1324
1425
1525
1626
1726
1827
1927
2028
2128
2228
2328
2428
2528
2627
2726
2826
2925
3024

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 29% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1915223123
21016223122
31116233020
41217233018
51318232917
61419232915
71620232813
81720232812
91921232710
10202123269
11222223258
12232223247
13252223237
14262223226
15282223216
16302222205
17322222195
18342221185
19362121184
20382120174
21402020164
22422019153
23451919143
24471918133
25491818123
26501817123
27521817112
28551716102
29551716102
30561715102

Wind in September

Winds average 6 mph in September.

Across September, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over September. Sunrise moves from 5:23 AM to 5:48 AM, and sunset from 6:14 PM to 5:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:236:14
212.85:236:12
312.85:246:11
412.75:256:09
512.75:266:08
612.75:276:06
712.65:286:04
812.65:296:03
912.55:296:01
1012.55:306:00
1112.45:315:58
1212.45:325:56
1312.45:335:55
1412.35:345:53
1512.35:355:52
1612.25:365:50
1712.25:365:48
1812.25:375:47
1912.15:385:45
2012.15:395:43
2112.05:405:42
2212.05:415:40
2311.95:425:39
2411.95:435:37
2511.95:445:35
2611.85:445:34
2711.85:455:32
2811.75:465:31
2911.75:475:29
3011.75:485:27

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.71 kWh/m².

For context, solar energy here swings from a low near 1.85 kWh/m² to a high of 6.36 kWh/m² in June across the year — September's 4.71 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.1Bright
45.1Bright
55.1Bright
65.0Bright
75.0Bright
85.0Bright
94.9Bright
104.9Bright
114.9Bright
124.8Bright
134.8Bright
144.8Bright
154.7Bright
164.7Bright
174.7Bright
184.6Bright
194.6Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.4Bright
254.4Bright
264.4Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
Planning a trip in September

Hazard calendar for Owensboro

In seasonPeak

In September, Owensboro sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Owensboro sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Owensboro?

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
7.1
Beach & pool
2nd-best month of the year

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

What to pack for Owensboro in September

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

In September, Owensboro sees daytime highs around 80°F and nights near 61°F. Worth packing: light clothes and sun protection. About 8 days see rain.

light clothessun protection

UV index in Owensboro 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 Owensboro peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 23UV 9Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5High
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep7High
Oct4Moderate
Nov3Moderate
Dec2Moderate

Air quality in Owensboro 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 Owensboro is worst in July — around 20 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (November, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1519 µg/m³Nov 168 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar12Good
Apr12Good
May15Moderate
Jun17Moderate
Jul20Moderate
Aug16Moderate
Sep12Moderate
Oct8Good
Nov8Good
Dec8Good
Location & terrain

Where is Owensboro?

Owensboro sits at 37.8°N, 87.1°W, 394 ft above sea level, in United States. The nearest listed city is Henderson, 26 mi away.

Topography around Owensboro

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

Within 2 miles, the terrain around Owensboro has only modest variations in elevation — a maximum elevation change of 157 ft around an average of 394 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 269 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 617 ft.

The land around Owensboro is covered by artificial surfaces (32%) and trees (24%) within 2 miles, cropland (57%) and trees (22%) within 10 miles, and trees (50%) and cropland (35%) within 50 miles.

2 miles
157 ft
10 miles
269 ft
50 miles
617 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Henderson 26 mi · Evansville 28 mi · Madisonville 37 mi · Jasper 43 mi · Radcliff 64 mi · Bowling Green 65 mi · Hopkinsville 66 mi · Vincennes 66 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 Owensboro (37.7742°, -87.1133°, elevation 394 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).