Greenwood weather in September

In September, Greenwood sees average daytime highs of 78°F and overnight lows near 58°F, with 3.0 in of rain across 7.9 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 81°F in the first days to 73°F by the end. The sky is clear or mostly clear about 43% 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 36 min by month's end. Set against the rest of the year, September is Greenwood's 1st-clearest and 10th-windiest month. For the whole year in context, see Greenwood's year-round climate.

Daytime high
78°
4th warmest
Overnight low
58°
9th coldest
Rainfall
3.0 in
7.9 wet days
Daylight
12 h 18 min
6:31 AM – 6:46 PM
Cloud cover
49%
1st clearest
Wind
6 mph
10th windiest
Solar energy
4.62 kWh/m²
Travel score
7.2
out of 10

Greenwood is city in Johnson County, Indiana, United States.

Density
769/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 81°F in the first days to 73°F by the end.

A typical September day in Greenwood reaches about 78°F in the afternoon and slips back to 58°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 67°F and 88°F. Set against its neighbours, September runs about 5°F cooler than August and about 12°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18263
28263
38262
48162
58162
68161
78061
88061
98060
108060
117959
127959
137959
147858
157858
167857
177757
187757
197656
207656
217655
227555
237555
247554
257454
267453
277453
287353
297352
307352

How September really feels in Greenwood

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.

Greenwood weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan37° / 23°3.39.349.50.0
Feb41° / 25°2.78.63.810.40.2
Mar52° / 34°4.011.21.811.72.5
Apr64° / 45°4.812.10.3135.2
May73° / 55°4.913.3014.16.2
Jun81° / 64°4.311.8014.75.9
Jul84° / 67°3.511.5014.55.4
Aug83° / 65°2.89.2013.66.0
Sep78° / 58°3.07.9012.37.2
Oct65° / 46°3.38.7010.96.1
Nov52° / 36°3.590.89.82.7
Dec41° / 28°3.310.13.39.30.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% 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 (%)
15941
25941
36040
46040
56040
66040
76040
86040
96040
105941
115941
126040
135941
145941
155941
165941
175842
185842
195941
205941
216040
225941
236040
246040
256139
266139
276040
286040
296040
306040

Chance of precipitation in September

Any precipitation

Greenwood gets around 3.0 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 27% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
128
227
327
427
527
626
726
825
925
1024
1124
1224
1325
1425
1525
1626
1726
1826
1927
2027
2128
2228
2328
2428
2528
2628
2728
2828
2927
3027

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 45% of days. Sticky, muggy-or-worse air turns up on roughly 17% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
12120232510
22221232410
3242123249
4252223238
5272222227
6282222216
7302322206
8322322195
9342322184
10352321174
11372321163
12382321163
13402320152
14412319152
15432319141
16452218141
17472217131
18492116121
19502116121
20532015111
21542014111
22581913100
2359191390
2461181290
2563181180
2664171180
2765161180
2866161170
2968151070
3069151060

Wind in September

Winds average 6 mph in September.

Across September, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over September. Sunrise moves from 6:17 AM to 6:45 AM, and sunset from 7:12 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:177:12
212.96:187:10
312.86:197:08
412.86:207:07
512.76:217:05
612.76:227:03
712.76:227:02
812.66:237:00
912.66:246:58
1012.56:256:57
1112.56:266:55
1212.46:276:53
1312.46:286:52
1412.36:296:50
1512.36:306:48
1612.36:316:46
1712.26:326:45
1812.26:336:43
1912.16:346:41
2012.16:356:40
2112.06:366:38
2212.06:376:36
2311.96:386:34
2411.96:396:33
2511.96:406:31
2611.86:416:29
2711.86:426:28
2811.76:436:26
2911.76:446:24
3011.66:456:23

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.62 kWh/m².

For context, solar energy here swings from a low near 1.74 kWh/m² to a high of 6.27 kWh/m² in July across the year — September's 4.62 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
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.7Bright
144.7Bright
154.6Bright
164.6Bright
174.6Bright
184.5Bright
194.5Bright
204.5Bright
214.4Bright
224.4Bright
234.3Bright
244.3Bright
254.3Bright
264.2Bright
274.2Bright
284.1Bright
294.1Bright
304.1Bright
Planning a trip in September

Is September a good time to visit Greenwood?

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

7.2
Sightseeing
1st-best month of the year
6.5
Beach & pool
3rd-best month of the year

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

What to pack for Greenwood in September

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

In September, Greenwood sees daytime highs around 78°F and nights near 58°F. Worth packing: light clothes and sun protection. About 8 days see rain.

light clothessun protection

UV index in Greenwood 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 Greenwood 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 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 23UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Greenwood 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 Greenwood is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodJul 1416 µg/m³Oct 218 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Moderate
Mar12Moderate
Apr12Good
May14Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Greenwood?

Greenwood sits at 39.6°N, 86.1°W, 804 ft above sea level, in United States. The nearest listed city is Franklin, 9.3 mi away.

Topography around Greenwood

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

Within 2 miles, the terrain around Greenwood has only modest variations in elevation — a maximum elevation change of 131 ft around an average of 807 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 492 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 758 ft.

The land around Greenwood is covered by artificial surfaces (34%), grassland (32%) and trees (26%) within 2 miles, cropland (35%), trees (26%) and grassland (23%) within 10 miles, and cropland (52%) and trees (34%) within 50 miles.

2 miles
131 ft
10 miles
492 ft
50 miles
758 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Franklin 9.3 mi · Indianapolis 11 mi · Lawrence 16 mi · Plainfield 17 mi · Broad Ripple 17 mi · Avon 19 mi · Shelbyville 19 mi · Fairfield Heights 21 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 Greenwood (39.6137°, -86.1067°, elevation 804 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).