Zionsville weather in October

In October, Zionsville sees average daytime highs of 64°F and overnight lows near 46°F, with 3.3 in of precipitation across 9 wet days and about 10.9 hours of daylight. It is the 6th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 70°F in the first days to 58°F by the end. The sky is clear or mostly clear about 36% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of October to 10 h 18 min by month's end. Set against the rest of the year, October is Zionsville's 4th-clearest and 7th-windiest month. For the whole year in context, see Zionsville's year-round climate.

Daytime high
64°
6th warmest
Overnight low
46°
7th coldest
Precipitation
3.3 in
9 wet days
Daylight
10 h 54 min
7:02 AM – 5:58 PM
Cloud cover
56%
4th clearest
Wind
9 mph
7th windiest
Solar energy
3.24 kWh/m²
Travel score
5.8
out of 10

Zionsville is town in Boone County, Indiana, United States.

Density
189/km²
people per km²
Founded
1852

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 70°F in the first days to 58°F by the end.

A typical October day in Zionsville reaches about 64°F in the afternoon and slips back to 46°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 52°F and 76°F. Set against its neighbours, October runs about 12°F cooler than September and about 14°F warmer than November.

20°40°60°80°151015202531
Avg high (°F)Avg low (°F)
17151
27151
37050
47050
56949
66949
76849
86848
96748
106748
116747
126647
136546
146546
156546
166445
176445
186345
196244
206244
216244
226143
236143
246043
256042
265942
275942
285842
295841
305741
315740

How October really feels in Zionsville

Once humidity and wind are folded in, October 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

October sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Zionsville weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan35° / 21°3.19.54.79.50.0
Feb39° / 24°2.58.74.310.40.1
Mar50° / 33°3.710.92.411.72.2
Apr62° / 44°4.6120.4135.0
May72° / 54°4.813.7014.26.0
Jun80° / 64°4.312.1014.86.1
Jul83° / 67°3.511.8014.55.6
Aug82° / 65°3.09.1013.66.6
Sep76° / 57°2.87.8012.37.2
Oct64° / 46°3.390.110.95.8
Nov50° / 35°3.49.21.19.82.4
Dec39° / 26°2.99.63.59.20.1

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 13% of October, with mostly cloudy or overcast conditions the remaining 50%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25743
35644
45644
55545
65545
75446
85446
95347
105347
115347
125347
135248
145248
155248
165149
175050
184951
194951
204753
214753
224654
234555
244456
254456
264357
274258
284258
294159
304159
314060

Chance of precipitation in October

Any precipitation

Zionsville gets around 3.3 in of rain and snow over 9 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 29% and peaks near 31% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)
128
228
327
427
527
627
727
827
928
1028
1128
1228
1328
1428
1528
1629
1729
1829
1929
2030
2130
2230
2330
2430
2530
2630
2730
2831
2931
3031
3131

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

Most of October feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, October lands in the dry band about 84% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1721495
2741394
3741394
4741394
5761284
6761284
7771283
8781273
9791173
10801172
11821062
12821062
13841051
1485951
1586941
1686941
1788840
1888840
1989830
2089830
2189830
2290730
2390730
2491720
2591720
2691720
2791720
2891720
2991720
3093610
3193610

Wind in October

Winds average 9 mph in October.

Across October, daily wind ranges from about 8 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 36 min at the start of October to 10 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over October. Sunrise moves from 6:47 AM to 7:19 AM, and sunset from 6:22 PM to 5:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:476:22
211.56:486:20
311.56:496:18
411.56:506:17
511.46:516:15
611.46:526:13
711.36:536:12
811.36:546:10
911.26:556:09
1011.26:566:07
1111.16:576:05
1211.16:586:04
1311.16:596:02
1411.07:006:01
1511.07:015:59
1610.97:025:58
1710.97:035:56
1810.87:055:55
1910.87:065:53
2010.87:075:52
2110.77:085:51
2210.77:095:49
2310.67:105:48
2410.67:115:47
2510.57:125:45
2610.57:135:44
2710.57:155:43
2810.47:165:42
2910.47:175:40
3010.47:185:39
3110.37:195:38

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.24 kWh/m².

For context, solar energy here swings from a low near 1.71 kWh/m² to a high of 6.29 kWh/m² in June across the year — October's 3.24 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
14.0Moderate
23.9Moderate
33.9Moderate
43.8Moderate
53.8Moderate
63.7Moderate
73.7Moderate
83.6Moderate
93.6Moderate
103.6Moderate
113.5Moderate
123.5Moderate
133.4Moderate
143.4Moderate
153.3Moderate
163.3Moderate
173.2Moderate
183.2Moderate
193.1Moderate
203.1Moderate
213.0Moderate
223.0Moderate
232.9Moderate
242.9Moderate
252.8Moderate
262.8Moderate
272.8Moderate
282.7Moderate
292.7Moderate
302.7Moderate
312.6Moderate
Planning a trip in October

Is October a good time to visit Zionsville?

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

5.8
Sightseeing
5th-best month of the year
2.1
Beach & pool
6th-best month of the year

October is a reasonable time to visit Zionsville for sightseeing.

What to pack for Zionsville in October

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

In October, Zionsville sees daytime highs around 64°F and nights near 46°F. Worth packing: a warm layer and rain gear. About 9 days see rain.

a warm layerrain gear

UV index in Zionsville in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Zionsville 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 8 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
Oct3Moderate
Nov3Moderate
Dec2Low

Air quality in Zionsville in October

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.

Air quality in Zionsville 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 Zionsville?

Zionsville sits at 40.0°N, 86.3°W, 843 ft above sea level, in United States. The nearest listed city is Carmel, 8.1 mi away.

Topography around Zionsville

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

Within 2 miles, the terrain around Zionsville has only modest variations in elevation — a maximum elevation change of 167 ft around an average of 889 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 394 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 745 ft.

The land around Zionsville is covered by trees (50%) and grassland (29%) within 2 miles, trees (33%), cropland (28%) and grassland (23%) within 10 miles, and cropland (63%) and trees (24%) within 50 miles.

2 miles
167 ft
10 miles
394 ft
50 miles
745 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Carmel 8.1 mi · Broad Ripple 8.7 mi · Westfield 9.3 mi · Brownsburg 11 mi · Fairfield Heights 11 mi · Lebanon 13 mi · Fishers 13 mi · Indianapolis 14 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 Zionsville (39.9509°, -86.2619°, elevation 843 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).