Zionsville weather in May

In May, Zionsville sees average daytime highs of 72°F and overnight lows near 54°F, with 4.8 in of rain across 13.7 wet days and about 14.2 hours of daylight. It is the 5th-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 68°F in the first days to 76°F by the end. The sky is clear or mostly clear about 25% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 42 min at the start of May to 14 h 36 min by month's end. Set against the rest of the year, May is Zionsville's 7th-clearest and 8th-windiest month. For the whole year in context, see Zionsville's year-round climate.

Daytime high
72°
5th warmest
Overnight low
54°
8th coldest
Rainfall
4.8 in
13.7 wet days
Daylight
14 h 12 min
5:35 AM – 7:47 PM
Cloud cover
65%
7th clearest
Wind
8 mph
8th windiest
Solar energy
5.72 kWh/m²
Travel score
6.0
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 May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 68°F in the first days to 76°F by the end.

A typical May day in Zionsville reaches about 72°F in the afternoon and slips back to 54°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 60°F and 83°F. Set against its neighbours, May runs about 10°F warmer than April and about 8°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
16749
26749
36850
46850
56951
66951
76951
86952
97052
107052
117053
127153
137153
147154
157154
167254
177255
187255
197355
207355
217356
227456
237456
247457
257557
267558
277558
287658
297659
307659
317659

How May really feels in Zionsville

Once humidity and wind are folded in, May 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

May 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 May compares with the rest of the year at a glance. May is the 5th-warmest and 1st-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 61%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13763
23664
33763
43664
53664
63763
73763
83763
93763
103763
113862
123862
133862
143862
153862
163961
174060
183961
194060
204060
214060
224060
234159
244159
254159
264159
274159
284060
294060
304258
314258

Chance of precipitation in May

Any precipitation

Zionsville gets around 4.8 in of rain over 13.7 wet days in May, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 44% and peaks near 44% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
143
243
344
444
544
644
744
844
944
1044
1144
1244
1344
1444
1544
1644
1743
1843
1944
2044
2144
2244
2344
2444
2544
2644
2744
2844
2944
3044
3144

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 62% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
18411500
28112610
38012710
47813810
57813810
67514920
774141020
872141130
971151130
1070151230
1168151340
1267151440
1366151450
1464161550
1562161660
1662161660
1760161770
1859161870
1958161880
2057161980
2155162090
2253172091
23511721101
24501721111
25491821111
26481821121
27471821121
28461921131
29451922131
30441922141
31431922151

Wind in May

Winds average 8 mph in May.

Across May, 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
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light 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
318light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 42 min at the start of May to 14 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over May. Sunrise moves from 5:52 AM to 5:25 AM, and sunset from 7:32 PM to 8:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:527:32
213.75:517:33
313.75:507:34
413.85:487:35
513.85:477:36
613.95:467:37
713.95:457:38
813.95:447:39
914.05:437:40
1014.05:417:41
1114.05:407:42
1214.15:397:43
1314.15:387:44
1414.15:377:45
1514.25:367:46
1614.25:357:47
1714.25:347:48
1814.35:347:49
1914.35:337:50
2014.35:327:51
2114.35:317:52
2214.45:307:53
2314.45:297:54
2414.45:297:55
2514.55:287:55
2614.55:277:56
2714.55:277:57
2814.55:267:58
2914.65:267:59
3014.65:258:00
3114.65:258:00

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.72 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 — May's 5.72 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.4Bright
55.4Bright
65.4Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.6Bright
125.6Bright
135.6Bright
145.7Bright
155.7Bright
165.7Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
266.0Bright
276.0Bright
286.0Bright
296.0Intense
306.0Intense
316.0Intense
Planning a trip in May

Is May a good time to visit Zionsville?

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

6.0
Sightseeing
4th-best month of the year
4.2
Beach & pool
5th-best month of the year

May is a reasonable time to visit Zionsville for sightseeing.

What to pack for Zionsville in May

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

In May, Zionsville sees daytime highs around 72°F and nights near 54°F. Worth packing: light clothes, rain gear and sun protection. About 14 days see rain.

light clothesrain gearsun protection

UV index in Zionsville in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 — 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 May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May 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
May 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).