Crawfordsville weather in September

In September, Crawfordsville sees average daytime highs of 77°F and overnight lows near 57°F, with 2.7 in of rain across 7.4 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 81°F in the first days to 73°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 36 min by month's end. Set against the rest of the year, September is Crawfordsville's 1st-clearest and 9th-windiest month. For the whole year in context, see Crawfordsville's year-round climate.

Daytime high
77°
4th warmest
Overnight low
57°
9th coldest
Rainfall
2.7 in
7.4 wet days
Daylight
12 h 18 min
6:34 AM – 6:50 PM
Cloud cover
49%
1st clearest
Wind
7 mph
9th windiest
Solar energy
4.62 kWh/m²
Travel score
7.3
out of 10

Crawfordsville is city in Montgomery County, Indiana, United States.

Density
667/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 Crawfordsville reaches about 77°F in the afternoon and slips back to 57°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 66°F and 87°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)
18162
28162
38162
48062
58061
68061
78060
87960
97960
107959
117859
127858
137858
147858
157757
167757
177756
187656
197656
207655
217555
227555
237454
247454
257453
267353
277353
287352
297252
307251

How September really feels in Crawfordsville

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.

Crawfordsville 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
Jan35° / 21°3.19.44.89.50.0
Feb39° / 24°2.58.6410.40.1
Mar50° / 33°3.610.92.411.72.2
Apr63° / 44°4.611.90.4135.0
May72° / 54°4.613.4014.26.1
Jun80° / 64°4.312.1014.86.1
Jul83° / 66°3.511014.65.7
Aug82° / 64°3.08.9013.66.6
Sep77° / 57°2.77.4012.37.3
Oct64° / 46°3.38.90.110.95.9
Nov51° / 35°3.58.61.19.82.5
Dec39° / 26°2.89.93.89.20.1

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 16% of September, with mostly cloudy or overcast conditions the remaining 41%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16040
26139
36139
46139
56139
66238
76139
86139
96139
106139
116139
126040
136040
145941
155941
165842
175842
185842
195842
205842
215842
225941
235941
245842
255842
265941
275941
285842
295842
305842

Chance of precipitation in September

Any precipitation

Crawfordsville gets around 2.7 in of rain over 7.4 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 25% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
127
226
326
425
525
624
724
824
923
1023
1123
1223
1323
1423
1524
1624
1724
1825
1925
2026
2126
2226
2327
2427
2527
2627
2728
2828
2928
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 49% of days. Sticky, muggy-or-worse air turns up on roughly 15% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1222123268
2242122257
3262122247
4282222236
5302222225
6322221204
7342221194
8362221183
9382221173
10392220162
11412220152
12432120142
13442120141
14462119131
15482019121
16502018111
17512018101
18541917100
1956191690
2059181580
2160181480
2262171470
2363171370
2464171270
2567161160
2667161160
2769151060
2870151050
2970151050
307214950

Wind in September

Winds average 7 mph in September.

Across September, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167light breeze
177light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze

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 6:19 AM to 6:48 AM, and sunset from 7:15 PM to 6:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:197:15
212.96:207:13
312.86:217:12
412.86:227:10
512.86:237:08
612.76:247:07
712.76:257:05
812.66:267:03
912.66:277:02
1012.56:287:00
1112.56:296:58
1212.46:306:56
1312.46:316:55
1412.36:326:53
1512.36:336:51
1612.36:346:50
1712.26:356:48
1812.26:366:46
1912.16:376:44
2012.16:386:43
2112.06:396:41
2212.06:406:39
2311.96:416:38
2411.96:426:36
2511.96:436:34
2611.86:446:32
2711.86:456:31
2811.76:466:29
2911.76:476:27
3011.66:486:26

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 6.33 kWh/m² in June across the year — September's 4.62 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.0Bright
55.0Bright
65.0Bright
74.9Bright
84.9Bright
94.8Bright
104.8Bright
114.8Bright
124.7Bright
134.7Bright
144.7Bright
154.6Bright
164.6Bright
174.5Bright
184.5Bright
194.5Bright
204.4Bright
214.4Bright
224.3Bright
234.3Bright
244.3Bright
254.2Bright
264.2Bright
274.2Bright
284.1Bright
294.1Bright
304.0Bright
Planning a trip in September

Is September a good time to visit Crawfordsville?

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

7.3
Sightseeing
1st-best month of the year
6.4
Beach & pool
3rd-best month of the year

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

What to pack for Crawfordsville in September

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

In September, Crawfordsville sees daytime highs around 77°F and nights near 57°F. Worth packing: light clothes and sun protection. About 7 days see rain.

light clothessun protection

UV index in Crawfordsville 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 Crawfordsville peaks around July 12 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 highHighModerateJul 12UV 9Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Crawfordsville 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 Crawfordsville is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodJul 1416 µg/m³Oct 218 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Moderate
Mar12Moderate
Apr11Good
May14Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Crawfordsville?

Crawfordsville sits at 40.0°N, 86.9°W, 794 ft above sea level, in United States. The nearest listed city is Lebanon, 22 mi away.

Topography around Crawfordsville

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

Within 2 miles, the terrain around Crawfordsville has only modest variations in elevation — a maximum elevation change of 207 ft around an average of 774 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 374 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 633 ft.

The land around Crawfordsville is covered by trees (40%), cropland (26%) and grassland (20%) within 2 miles, cropland (70%) within 10 miles, and cropland (63%) and trees (26%) within 50 miles.

2 miles
207 ft
10 miles
374 ft
50 miles
633 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Lebanon 22 mi · Frankfort 25 mi · Lafayette 26 mi · West Lafayette 27 mi · Brownsburg 29 mi · Fairfield Heights 30 mi · Avon 32 mi · Zionsville 33 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 Crawfordsville (40.0412°, -86.8744°, elevation 794 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).