Richmond weather in September

In September, Richmond sees average daytime highs of 79°F and overnight lows near 60°F, with 3.6 in of rain across 8.2 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 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 Richmond's 1st-clearest and 10th-windiest month. For the whole year in context, see Richmond's year-round climate.

Daytime high
79°
4th warmest
Overnight low
60°
9th coldest
Rainfall
3.6 in
8.2 wet days
Daylight
12 h 12 min
6:24 AM – 6:39 PM
Cloud cover
50%
1st clearest
Wind
5 mph
10th windiest
Solar energy
4.55 kWh/m²
Travel score
6.9
out of 10

Richmond is city in and the county seat of Madison County, Kentucky, United States.

Density
559/km²
people per km²
Founded
1798

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 Richmond 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 11°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18365
28365
38364
48364
58364
68263
78263
88263
98162
108162
118162
128061
138061
148060
157960
167960
177959
187859
197859
207858
217758
227758
237657
247657
257656
267656
277556
287555
297455
307454

How September really feels in Richmond

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.

Richmond 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°3.710.339.70.5
Feb47° / 31°3.810.52.710.51.5
Mar56° / 38°4.512.31.611.73.7
Apr67° / 48°4.611.90.212.95.8
May75° / 57°4.613.20146.2
Jun83° / 65°4.213014.65.5
Jul86° / 69°4.212.9014.34.8
Aug85° / 67°3.110.4013.55.3
Sep79° / 60°3.68.2012.36.9
Oct68° / 48°3.28.50.1116.6
Nov56° / 39°3.58.80.5103.8
Dec47° / 32°4.2112.19.41.4

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 16% 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
86040
96040
106040
115941
125941
135842
145842
155842
165743
175743
185644
195644
205644
215644
225644
235743
245743
255743
265842
275842
285941
295941
305941

Chance of precipitation in September

Any precipitation

Richmond gets around 3.6 in of rain over 8.2 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 30% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
130
230
329
429
528
628
727
826
926
1026
1126
1226
1326
1426
1527
1627
1727
1828
1928
2028
2128
2228
2328
2428
2528
2627
2726
2826
2925
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 30% of days. Sticky, muggy-or-worse air turns up on roughly 24% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11017253315
21018253314
31119253213
41220253112
51321263011
6142226289
7162326278
8172326267
9182426256
10202427245
11212427235
12232427234
13242427223
14262327213
15282327203
16292326192
17312226182
18332226182
19352225171
20362225161
21382224151
22402124141
23422123131
24442122121
25462121120
26482120110
27492119100
2852211890
2952211890
3054211780

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
225calm
235calm
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 6:37 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
212.86:127:01
312.86:136:59
412.76:146:58
512.76:156:56
612.76:166:55
712.66:166:53
812.66:176:52
912.56:186:50
1012.56:196:48
1112.46:206:47
1212.46:216:45
1312.46:226:44
1412.36:236:42
1512.36:236:40
1612.26:246:39
1712.26:256:37
1812.26:266:35
1912.16:276:34
2012.16:286:32
2112.06:296:31
2212.06:306:29
2311.96:306:27
2411.96:316:26
2511.96:326:24
2611.86:336:23
2711.86:346:21
2811.76:356:19
2911.76:366:18
3011.76:376:16

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.55 kWh/m².

For context, solar energy here swings from a low near 1.83 kWh/m² to a high of 6.13 kWh/m² in June across the year — September's 4.55 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
84.8Bright
94.8Bright
104.8Bright
114.7Bright
124.7Bright
134.7Bright
144.6Bright
154.6Bright
164.5Bright
174.5Bright
184.5Bright
194.4Bright
204.4Bright
214.3Bright
224.3Bright
234.3Bright
244.2Bright
254.2Bright
264.2Bright
274.2Bright
284.1Bright
294.1Bright
304.1Bright
Planning a trip in September

Is September a good time to visit Richmond?

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 Richmond for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Richmond in September

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

In September, Richmond 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 Richmond 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 Richmond 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 Richmond 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 Richmond is worst in July — around 18 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (December, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1517 µg/m³Dec 136 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar9Good
Apr10Good
May13Moderate
Jun15Moderate
Jul18Moderate
Aug14Moderate
Sep10Good
Oct6Good
Nov6Good
Dec6Good
Location & terrain

Where is Richmond?

Richmond sits at 37.7°N, 84.3°W, 948 ft above sea level, in United States. The nearest listed city is Nicholasville, 18 mi away.

Topography around Richmond

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

Within 2 miles, the terrain around Richmond has only modest variations in elevation — a maximum elevation change of 217 ft around an average of 935 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 607 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,240 ft.

The land around Richmond is covered by grassland (40%), artificial surfaces (30%) and trees (26%) within 2 miles, grassland (59%) and trees (36%) within 10 miles, and trees (57%) and grassland (34%) within 50 miles.

2 miles
217 ft
10 miles
607 ft
50 miles
1,240 ft
treesgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Nicholasville 18 mi · Winchester 18 mi · Lexington 19 mi · Lexington-Fayette 23 mi · Danville 27 mi · Georgetown 35 mi · Frankfort 44 mi · Shelbyville 60 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 Richmond (37.7479°, -84.2947°, elevation 948 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).