Marion weather in May

In May, Marion sees average daytime highs of 71°F and overnight lows near 53°F, with 4.4 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 67°F in the first days to 75°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 42 min by month's end. Set against the rest of the year, May is Marion's 7th-clearest and 8th-windiest month. For the whole year in context, see Marion's year-round climate.

Daytime high
71°
5th warmest
Overnight low
53°
8th coldest
Rainfall
4.4 in
13.7 wet days
Daylight
14 h 12 min
5:31 AM – 7:46 PM
Cloud cover
65%
7th clearest
Wind
9 mph
8th windiest
Solar energy
5.73 kWh/m²
Travel score
6.0
out of 10

Marion is city in and the county seat of Grant County, Indiana, United States.

Density
715/km²
people per km²
Founded
1831

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 67°F in the first days to 75°F by the end.

A typical May day in Marion reaches about 71°F in the afternoon and slips back to 53°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 59°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)
16748
26748
36749
46849
56849
66850
76950
86951
96951
107051
117051
127052
137152
147152
157153
167153
177253
187254
197254
207354
217355
227355
237455
247456
257456
267456
277557
287557
297558
307658
317658

How May really feels in Marion

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.

Marion 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
Jan34° / 20°2.99.75.29.40.0
Feb38° / 23°2.48.54.610.40.0
Mar49° / 31°3.510.62.811.72.0
Apr62° / 42°4.312.30.5134.8
May71° / 53°4.413.7014.26.0
Jun80° / 63°4.212.2014.86.2
Jul83° / 66°3.411.2014.65.9
Aug81° / 64°3.39.7013.66.6
Sep76° / 56°2.68.5012.37.1
Oct64° / 45°3.19.30.110.95.7
Nov50° / 35°3.391.49.72.3
Dec39° / 26°2.89.83.89.20.1

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 13% of May, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13565
23565
33565
43664
53664
63664
73664
83664
93664
103763
113763
123763
133862
143862
154060
163961
173961
183961
193862
203961
213961
223961
233961
244159
254060
264060
274159
284060
294159
304159
314159

Chance of precipitation in May

Any precipitation

Marion gets around 4.4 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
343
443
543
643
743
844
944
1044
1144
1244
1344
1444
1544
1644
1744
1844
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 66% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
187940
2841051
3841051
4821161
5801271
6791281
7781291
8771391
97513102
107314112
117214122
127114132
136915133
146815143
156715153
166515164
176515164
186415174
196215185
206215185
216015196
225716207
235616208
245616208
255416219
265317219
2752172110
2851172210
2949182211
3048182212
3147182212

Wind in May

Winds average 9 mph in May.

Across May, daily wind ranges from about 8 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
110light breeze
210light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light 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 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over May. Sunrise moves from 5:49 AM to 5:20 AM, and sunset from 7:31 PM to 8:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:497:31
213.75:477:32
313.85:467:33
413.85:457:34
513.95:447:35
613.95:427:36
713.95:417:37
814.05:407:38
914.05:397:39
1014.05:387:40
1114.15:377:41
1214.15:357:42
1314.15:347:43
1414.25:337:44
1514.25:327:45
1614.25:317:46
1714.35:307:47
1814.35:307:48
1914.35:297:49
2014.45:287:50
2114.45:277:51
2214.45:267:52
2314.55:257:53
2414.55:257:54
2514.55:247:55
2614.55:237:56
2714.65:237:56
2814.65:227:57
2914.65:217:58
3014.65:217:59
3114.75:208:00

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.73 kWh/m².

For context, solar energy here swings from a low near 1.68 kWh/m² to a high of 6.3 kWh/m² in July across the year — May's 5.73 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.4Bright
45.4Bright
55.4Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.6Bright
115.6Bright
125.6Bright
135.7Bright
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 Marion?

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
4.1
Beach & pool
5th-best month of the year

May is a reasonable time to visit Marion for sightseeing.

What to pack for Marion in May

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

In May, Marion sees daytime highs around 71°F and nights near 53°F. Worth packing: rain gear and sun protection. About 14 days see rain.

rain gearsun protection

UV index in Marion 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 Marion peaks around June 19 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 highHighModerateLowJun 19UV 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 Marion 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 Marion 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).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1416 µg/m³Oct 228 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Moderate
Mar12Moderate
Apr12Moderate
May14Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Marion?

Marion sits at 40.6°N, 85.7°W, 810 ft above sea level, in United States. The nearest listed city is Huntington, 24 mi away.

Topography around Marion

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

Within 2 miles, the terrain around Marion has only modest variations in elevation — a maximum elevation change of 167 ft around an average of 840 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 266 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 728 ft.

The land around Marion is covered by trees (38%), grassland (28%) and artificial surfaces (25%) within 2 miles, cropland (67%) within 10 miles, and cropland (75%) within 50 miles.

2 miles
167 ft
10 miles
266 ft
50 miles
728 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Huntington 24 mi · Kokomo 25 mi · Muncie 29 mi · Anderson 31 mi · Logansport 39 mi · Noblesville 40 mi · Westfield 43 mi · Fishers 45 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 Marion (40.5584°, -85.6591°, elevation 810 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).