Danville weather in September

In September, Danville sees average daytime highs of 79°F and overnight lows near 60°F, with 3.7 in of rain across 8.5 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 83°F in the first days to 75°F by the end. The sky is clear or mostly clear about 44% 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 Danville's 1st-clearest and 10th-windiest month. For the whole year in context, see Danville's year-round climate.

Daytime high
79°
4th warmest
Overnight low
60°
9th coldest
Rainfall
3.7 in
8.5 wet days
Daylight
12 h 12 min
6:26 AM – 6:41 PM
Cloud cover
50%
1st clearest
Wind
5 mph
10th windiest
Solar energy
4.58 kWh/m²
Travel score
6.9
out of 10

Danville is city in Boyle County, Kentucky, United States.

Density
405/km²
people per km²
Founded
1785

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 83°F in the first days to 75°F by the end.

A typical September day in Danville reaches about 79°F in the afternoon and slips back to 60°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 70°F and 88°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)
18465
28365
38365
48364
58364
68264
78263
88263
98263
108162
118162
128162
138061
148061
158060
167960
177960
187859
197859
207859
217758
227758
237757
247657
257657
267656
277556
287555
297455
307455

How September really feels in Danville

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.

Danville weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan43° / 28°3.710.43.19.70.5
Feb47° / 31°3.910.22.710.51.4
Mar56° / 38°4.611.81.511.73.7
Apr67° / 48°4.911.90.212.95.8
May75° / 57°4.913.40146.2
Jun83° / 66°4.313014.65.4
Jul86° / 69°4.312.8014.34.7
Aug85° / 67°3.310.5013.45.2
Sep79° / 60°3.78.5012.36.9
Oct68° / 49°3.48.40.1116.6
Nov55° / 39°3.590.5103.8
Dec46° / 33°4.310.829.41.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 41%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15941
25941
36040
45941
55941
65941
75941
86040
95941
105941
115941
125842
135842
145842
155842
165743
175743
185743
195743
205743
215743
225743
235842
245842
255941
265941
275941
285941
296139
306139

Chance of precipitation in September

Any precipitation

Danville gets around 3.7 in of rain over 8.5 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 30% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
130
230
330
430
529
629
728
827
927
1026
1126
1226
1326
1427
1527
1627
1728
1828
1929
2029
2130
2230
2330
2430
2529
2629
2728
2828
2927
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 29% of days. Sticky, muggy-or-worse air turns up on roughly 25% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11018233217
21019233215
31120243114
41221243013
51322242911
61423252810
7152425279
8162425268
9182526257
10192526246
11212526235
12222526234
13242426224
14252426213
15272426213
16292326202
17312325192
18322325182
19342324172
20362223162
21382223161
22402222151
23422221141
24442120131
25462120131
26482119121
27492118111
28502117111
29522017101
3054201691

Wind in September

Winds average 5 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
155calm
165calm
175calm
185calm
195calm
205calm
215calm
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 6:13 AM to 6:39 AM, and sunset from 7:04 PM to 6:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:137:04
212.86:147:03
312.86:157:01
412.76:167:00
512.76:176:58
612.66:186:57
712.66:186:55
812.66:196:53
912.56:206:52
1012.56:216:50
1112.46:226:49
1212.46:236:47
1312.46:246:45
1412.36:256:44
1512.36:256:42
1612.26:266:41
1712.26:276:39
1812.26:286:37
1912.16:296:36
2012.16:306:34
2112.06:316:32
2212.06:326:31
2311.96:326:29
2411.96:336:28
2511.96:346:26
2611.86:356:24
2711.86:366:23
2811.76:376:21
2911.76:386:20
3011.76:396:18

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.58 kWh/m².

For context, solar energy here swings from a low near 1.83 kWh/m² to a high of 6.15 kWh/m² in June across the year — September's 4.58 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.0Bright
45.0Bright
55.0Bright
64.9Bright
74.9Bright
84.9Bright
94.8Bright
104.8Bright
114.7Bright
124.7Bright
134.7Bright
144.6Bright
154.6Bright
164.5Bright
174.5Bright
184.5Bright
194.4Bright
204.4Bright
214.4Bright
224.3Bright
234.3Bright
244.3Bright
254.3Bright
264.2Bright
274.2Bright
284.2Bright
294.2Bright
304.1Bright
Planning a trip in September

Is September a good time to visit Danville?

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

6.9
Sightseeing
1st-best month of the year
6.7
Beach & pool
2nd-best month of the year

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

What to pack for Danville in September

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

In September, Danville sees daytime highs around 79°F and nights near 60°F. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Danville 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 Danville 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
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Moderate

Air quality in Danville 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 Danville is worst in July — around 18 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (December, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1518 µg/m³Dec 116 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar9Good
Apr10Good
May13Moderate
Jun16Moderate
Jul18Moderate
Aug14Moderate
Sep11Good
Oct7Good
Nov6Good
Dec6Good
Location & terrain

Where is Danville?

Danville sits at 37.6°N, 84.8°W, 984 ft above sea level, in United States. The nearest listed city is Nicholasville, 19 mi away.

Topography around Danville

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

Within 2 miles, the terrain around Danville has only modest variations in elevation — a maximum elevation change of 246 ft around an average of 945 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 755 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,293 ft.

The land around Danville is covered by grassland (45%) and trees (27%) within 2 miles, grassland (58%) and trees (26%) within 10 miles, and trees (51%) and grassland (38%) within 50 miles.

2 miles
246 ft
10 miles
755 ft
50 miles
1,293 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Nicholasville 19 mi · Richmond 27 mi · Lexington 29 mi · Lexington-Fayette 33 mi · Frankfort 39 mi · Winchester 40 mi · Georgetown 40 mi · Shelbyville 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 Danville (37.6456°, -84.7722°, elevation 984 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).