Radcliff weather in September

In September, Radcliff sees average daytime highs of 80°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 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 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 Radcliff's 1st-clearest and 10th-windiest month. For the whole year in context, see Radcliff's year-round climate.

Daytime high
80°
4th warmest
Overnight low
60°
9th coldest
Rainfall
3.5 in
8.3 wet days
Daylight
12 h 12 min
6:31 AM – 6:45 PM
Cloud cover
49%
1st clearest
Wind
5 mph
10th windiest
Solar energy
4.64 kWh/m²
Travel score
6.8
out of 10

Radcliff is city in Hardin County, Kentucky.

Density
696/km²
people per km²
Founded
1919

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 Radcliff reaches about 80°F in the afternoon and slips back to 60°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 70°F and 89°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)
18566
28465
38465
48465
58364
68364
78364
88363
98263
108262
118262
128162
138161
148161
158061
168060
178060
187959
197959
207859
217858
227858
237757
247757
257756
267656
277656
287655
297555
307555

How September really feels in Radcliff

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.

Radcliff 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°3.8102.69.70.4
Feb47° / 31°3.69.72.710.51.4
Mar57° / 38°4.812.11.311.73.7
Apr67° / 48°5.112.20.112.95.8
May76° / 58°5.213.10146.3
Jun84° / 67°4.312.3014.65.3
Jul87° / 70°4.112.2014.44.6
Aug86° / 68°3.29.8013.55.1
Sep80° / 60°3.58.3012.36.8
Oct68° / 49°3.68.10116.7
Nov56° / 39°3.79.10.5103.8
Dec46° / 32°4.410.81.99.41.2

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 17% of September, with mostly cloudy or overcast conditions the remaining 40%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25941
35941
45941
56040
66040
76040
86040
96040
106040
115941
125941
135941
145941
155842
165941
175941
185941
195941
205941
215941
226040
236139
246139
256238
266337
276436
286436
296436
306535

Chance of precipitation in September

Any precipitation

Radcliff 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 27% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
130
229
329
429
528
628
727
826
926
1025
1125
1225
1325
1425
1526
1626
1727
1828
1928
2029
2129
2229
2329
2429
2529
2628
2728
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 32% of days. Sticky, muggy-or-worse air turns up on roughly 27% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11114263019
21215253018
31316252916
41417252915
51518252814
61619252712
71720252711
81821252610
9202225259
10212225258
11222324247
12242324236
13252324235
14272324225
15292323214
16302223204
17322223194
18352122183
19362122183
20392022173
21412021163
22432021152
23451920142
24471919132
25491819122
26511818112
27531817102
28531817102
2955181692
3057181582

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
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 6:18 AM to 6:43 AM, and sunset from 7:09 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:187:09
212.86:197:08
312.86:207:06
412.76:207:05
512.76:217:03
612.76:227:01
712.66:237:00
812.66:246:58
912.56:256:57
1012.56:266:55
1112.46:276:53
1212.46:276:52
1312.46:286:50
1412.36:296:49
1512.36:306:47
1612.26:316:45
1712.26:326:44
1812.26:336:42
1912.16:346:40
2012.16:346:39
2112.06:356:37
2212.06:366:36
2311.96:376:34
2411.96:386:32
2511.96:396:31
2611.86:406:29
2711.86:416:28
2811.76:426:26
2911.76:436:24
3011.76:436:23

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.64 kWh/m².

For context, solar energy here swings from a low near 1.84 kWh/m² to a high of 6.24 kWh/m² in June across the year — September's 4.64 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.1Bright
35.1Bright
45.0Bright
55.0Bright
65.0Bright
74.9Bright
84.9Bright
94.9Bright
104.8Bright
114.8Bright
124.8Bright
134.7Bright
144.7Bright
154.7Bright
164.6Bright
174.6Bright
184.5Bright
194.5Bright
204.5Bright
214.5Bright
224.4Bright
234.4Bright
244.4Bright
254.3Bright
264.3Bright
274.3Bright
284.3Bright
294.2Bright
304.2Bright
Planning a trip in September

Is September a good time to visit Radcliff?

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
6.9
Beach & pool
2nd-best month of the year

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

What to pack for Radcliff in September

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

In September, Radcliff sees daytime highs around 80°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 Radcliff 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 Radcliff peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 22UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5High
Apr6High
May7Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Radcliff 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 Radcliff is worst in July — around 19 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (November, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1519 µg/m³Nov 187 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar11Good
Apr11Good
May14Moderate
Jun16Moderate
Jul19Moderate
Aug15Moderate
Sep11Good
Oct7Good
Nov7Good
Dec7Good
Location & terrain

Where is Radcliff?

Radcliff sits at 37.8°N, 85.9°W, 771 ft above sea level, in United States. The nearest listed city is Elizabethtown, 11 mi away.

Topography around Radcliff

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

Within 2 miles, the terrain around Radcliff has only modest variations in elevation — a maximum elevation change of 308 ft around an average of 738 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 636 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 899 ft.

The land around Radcliff is covered by trees (55%) and grassland (28%) within 2 miles, trees (60%) and grassland (24%) within 10 miles, and trees (58%) and grassland (25%) within 50 miles.

2 miles
308 ft
10 miles
636 ft
50 miles
899 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Elizabethtown 11 mi · Valley Station 19 mi · Pleasure Ridge Park 22 mi · Okolona 25 mi · Shively 26 mi · Newburg 27 mi · Highview 27 mi · Fern Creek 30 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 Radcliff (37.8404°, -85.9491°, elevation 771 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).