Frankfort weather in May

In May, Frankfort sees average daytime highs of 72°F and overnight lows near 54°F, with 4.5 in of rain across 13.6 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 24% 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 Frankfort's 7th-clearest and 8th-windiest month. For the whole year in context, see Frankfort's year-round climate.

Daytime high
72°
5th warmest
Overnight low
54°
8th coldest
Rainfall
4.5 in
13.6 wet days
Daylight
14 h 12 min
5:36 AM – 7:49 PM
Cloud cover
65%
7th clearest
Wind
9 mph
8th windiest
Solar energy
5.74 kWh/m²
Travel score
6.1
out of 10

Frankfort is county seat in Clinton County, Indiana, United States.

Density
982/km²
people per km²
Founded
1830

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 Frankfort 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 84°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
36849
46850
56950
66951
76951
87051
97052
107052
117152
127153
137153
147153
157253
167254
177254
187355
197355
207355
217355
227456
237456
247456
257557
267557
277558
287658
297658
307659
317659

How May really feels in Frankfort

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.

Frankfort 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°3.09.54.99.50.0
Feb39° / 24°2.48.74.410.40.1
Mar50° / 32°3.510.82.411.72.1
Apr62° / 43°4.412.10.4135.0
May72° / 54°4.513.6014.26.1
Jun80° / 63°4.312.3014.86.1
Jul83° / 66°3.411.2014.65.7
Aug82° / 64°3.09.6013.66.5
Sep77° / 57°2.78.1012.37.2
Oct64° / 46°3.29.10.110.95.8
Nov50° / 35°3.49.11.29.82.4
Dec39° / 26°2.79.73.79.20.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% 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
23763
33664
43664
53664
63664
73664
83664
93664
103763
113763
123763
133862
143862
153862
163961
173961
183961
193961
204060
214060
224060
234060
244159
254159
264159
274159
284159
294159
304357
314357

Chance of precipitation in May

Any precipitation

Frankfort gets around 4.5 in of rain over 13.6 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 43% and peaks near 44% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
143
243
343
444
544
644
744
844
944
1044
1143
1243
1343
1443
1543
1643
1743
1843
1943
2043
2143
2243
2343
2443
2543
2643
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 64% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1869500
28410510
38211610
48111710
57912810
67812820
77613920
874141020
972141130
1071151130
1170151230
1268151340
1367161340
1466161440
1564161550
1664161550
1763161650
1860171760
1960171760
2058171870
2157171970
2256171980
2354172090
2453182090
25511821100
26501821110
27491821110
28481821120
29471921130
30461921130
31451921141

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 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 5:53 AM to 5:25 AM, and sunset from 7:34 PM to 8:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:537:34
213.75:517:35
313.85:507:36
413.85:497:37
513.85:487:38
613.95:467:39
713.95:457:40
814.05:447:41
914.05:437:42
1014.05:427:43
1114.15:417:44
1214.15:407:45
1314.15:387:46
1414.25:377:47
1514.25:367:48
1614.25:367:49
1714.35:357:50
1814.35:347:51
1914.35:337:52
2014.35:327:53
2114.45:317:54
2214.45:307:55
2314.45:307:56
2414.55:297:56
2514.55:287:57
2614.55:277:58
2714.55:277:59
2814.65:268:00
2914.65:268:01
3014.65:258:02
3114.65:258:02

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.74 kWh/m².

For context, solar energy here swings from a low near 1.71 kWh/m² to a high of 6.33 kWh/m² in July across the year — May's 5.74 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
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
246.0Bright
256.0Bright
266.0Bright
276.0Intense
286.0Intense
296.0Intense
306.1Intense
316.1Intense
Planning a trip in May

Is May a good time to visit Frankfort?

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

6.1
Sightseeing
3rd-best month of the year
4.3
Beach & pool
5th-best month of the year

May is a reasonable time to visit Frankfort for sightseeing.

What to pack for Frankfort in May

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

In May, Frankfort 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 Frankfort 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 Frankfort 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 highHighModerateLowJun 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 Frankfort 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 Frankfort is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 7 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
May13Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct7Good
Nov8Good
Dec9Good
Location & terrain

Where is Frankfort?

Frankfort sits at 40.3°N, 86.5°W, 850 ft above sea level, in United States. The nearest listed city is Lebanon, 16 mi away.

Topography around Frankfort

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

Within 2 miles, the terrain around Frankfort has only modest variations in elevation — a maximum elevation change of 98 ft around an average of 856 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 282 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 627 ft.

The land around Frankfort is covered by cropland (44%) within 2 miles, cropland (81%) within 10 miles, and cropland (70%) within 50 miles.

2 miles
98 ft
10 miles
282 ft
50 miles
627 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Lebanon 16 mi · Lafayette 21 mi · West Lafayette 23 mi · Kokomo 24 mi · Crawfordsville 25 mi · Westfield 26 mi · Zionsville 26 mi · Carmel 29 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 Frankfort (40.2795°, -86.5108°, elevation 850 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).