Winchester weather in September

In September, Winchester sees average daytime highs of 79°F and overnight lows near 60°F, with 3.5 in of rain across 8.3 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 74°F by the end. The sky is clear or mostly clear about 42% 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 Winchester's 1st-clearest and 10th-windiest month. For the whole year in context, see Winchester's year-round climate.

Daytime high
79°
4th warmest
Overnight low
60°
9th coldest
Rainfall
3.5 in
8.3 wet days
Daylight
12 h 12 min
6:24 AM – 6:38 PM
Cloud cover
50%
1st clearest
Wind
5 mph
10th windiest
Solar energy
4.57 kWh/m²
Travel score
7.0
out of 10

Winchester is city in and the county seat of Clark County, Kentucky, United States.

Density
903/km²
people per km²

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 74°F by the end.

A typical September day in Winchester 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 69°F and 88°F. Set against its neighbours, September runs about 6°F cooler than August and about 12°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18365
28364
38364
48364
58263
68263
78263
88162
98162
108162
118061
128061
138060
147960
157960
167959
177859
187859
197858
207758
217758
227657
237657
247656
257556
267555
277555
287455
297454
307454

How September really feels in Winchester

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.

Winchester 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
Jan42° / 28°3.710.43.29.70.3
Feb46° / 30°3.810.53.110.51.2
Mar55° / 37°4.4121.811.73.4
Apr66° / 47°4.812.40.3135.6
May74° / 56°4.713.30146.2
Jun82° / 65°4.313.1014.65.5
Jul85° / 68°4.112.4014.44.9
Aug85° / 67°3.110.7013.55.3
Sep79° / 60°3.58.3012.37.0
Oct67° / 48°3.38.70.1116.4
Nov55° / 38°3.59.10.59.93.6
Dec46° / 32°4.210.82.29.41.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% 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 42%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16040
26040
36040
46040
56040
66040
76040
85941
95941
105941
115842
125842
135743
145743
155743
165644
175644
185644
195644
205644
215644
225644
235644
245743
255743
265743
275743
285842
295941
305941

Chance of precipitation in September

Any precipitation

Winchester gets around 3.5 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 31% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
131
230
330
430
529
629
728
827
927
1026
1126
1226
1326
1426
1527
1627
1727
1827
1928
2028
2128
2228
2328
2428
2528
2627
2727
2826
2926
3025

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 23% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11119233314
21220233213
31221243112
41322243011
51522242910
6162324289
7172425268
8182425257
9202525246
10212525235
11232426234
12252426224
13262326213
14282326203
15302226202
16322226192
17332126182
18352125171
19372125161
20392025151
21412024141
22432023131
23452022130
24472022120
25492021110
26502020100
27512019100
2854191890
2956191780
3057191670

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 6:11 AM to 6:36 AM, and sunset from 7:02 PM to 6:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:117:02
212.86:117:01
312.86:126:59
412.76:136:58
512.76:146:56
612.76:156:54
712.66:166:53
812.66:176:51
912.56:186:50
1012.56:196:48
1112.56:196:46
1212.46:206:45
1312.46:216:43
1412.36:226:42
1512.36:236:40
1612.26:246:38
1712.26:256:37
1812.26:266:35
1912.16:266:33
2012.16:276:32
2112.06:286:30
2212.06:296:29
2311.96:306:27
2411.96:316:25
2511.96:326:24
2611.86:336:22
2711.86:346:20
2811.76:356:19
2911.76:356:17
3011.76:366:16

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 1.81 kWh/m² to a high of 6.14 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
35.0Bright
45.0Bright
55.0Bright
64.9Bright
74.9Bright
84.9Bright
94.8Bright
104.8Bright
114.8Bright
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
254.2Bright
264.2Bright
274.2Bright
284.2Bright
294.1Bright
304.1Bright
Planning a trip in September

Is September a good time to visit Winchester?

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

7.0
Sightseeing
1st-best month of the year
6.6
Beach & pool
2nd-best month of the year

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

What to pack for Winchester in September

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

In September, Winchester sees daytime highs around 79°F and nights near 60°F. Worth packing: light clothes, rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

UV index in Winchester 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 Winchester peaks around June 20 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 20UV 9Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5High
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Winchester 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 Winchester is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (December, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1418 µg/m³Dec 107 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar10Good
Apr11Good
May14Moderate
Jun16Moderate
Jul18Moderate
Aug14Moderate
Sep11Good
Oct7Good
Nov7Good
Dec7Good
Location & terrain

Where is Winchester?

Winchester sits at 38.0°N, 84.2°W, 994 ft above sea level, in United States. The nearest listed city is Lexington-Fayette, 16 mi away.

Topography around Winchester

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

Within 2 miles, the terrain around Winchester has only modest variations in elevation — a maximum elevation change of 177 ft around an average of 971 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 561 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,257 ft.

The land around Winchester is covered by grassland (45%) and trees (31%) within 2 miles, grassland (50%) and trees (30%) within 10 miles, and trees (57%) and grassland (35%) within 50 miles.

2 miles
177 ft
10 miles
561 ft
50 miles
1,257 ft
treesgrasslandcroplandartificial surfaces
September weather nearby: Lexington-Fayette 16 mi · Lexington 16 mi · Richmond 18 mi · Nicholasville 23 mi · Georgetown 25 mi · Danville 40 mi · Frankfort 40 mi · Shelbyville 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 Winchester (37.9901°, -84.1796°, elevation 994 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).