Troy weather in May

In May, Troy sees average daytime highs of 71°F and overnight lows near 53°F, with 4.4 in of rain across 13.1 wet days and about 14.2 hours of daylight. It is the 5th-warmest and 2nd-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 23% 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 Troy's 7th-clearest and 8th-windiest month. For the whole year in context, see Troy's year-round climate.

Daytime high
71°
5th warmest
Overnight low
53°
8th coldest
Rainfall
4.4 in
13.1 wet days
Daylight
14 h 12 min
5:27 AM – 7:39 PM
Cloud cover
65%
7th clearest
Wind
8 mph
8th windiest
Solar energy
5.74 kWh/m²
Travel score
6.1
out of 10

Troy is city in and seat of Miami County, Ohio, United States.

Density
830/km²
people per km²

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 Troy 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 9°F warmer than April and about 8°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
16748
26749
36749
46849
56850
66950
76951
86951
96951
107051
117052
127052
137152
147153
157153
167153
177253
187254
197254
207354
217355
227355
237455
247456
257456
267456
277557
287557
297558
307658
317658

How May really feels in Troy

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.

Troy weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan36° / 22°3.19.94.99.50.0
Feb39° / 24°2.594.310.40.1
Mar50° / 32°3.711.12.211.72.1
Apr62° / 43°4.512.50.6134.9
May71° / 53°4.413.1014.26.1
Jun80° / 62°3.911.7014.86.2
Jul83° / 66°3.211.4014.65.7
Aug82° / 64°3.19.4013.66.5
Sep76° / 57°2.77.8012.37.2
Oct64° / 45°2.98.10.210.95.8
Nov51° / 35°3.38.91.19.82.5
Dec40° / 27°3.29.73.39.20.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13763
23763
33763
43763
53763
63862
73862
83862
93961
103961
113961
124060
134060
143961
153961
164060
174060
184060
194060
204159
214060
224060
234060
244060
254060
264159
274159
284159
294159
304258
314258

Chance of precipitation in May

Any precipitation

Troy gets around 4.4 in of rain over 13.1 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 42% and peaks near 44% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
143
243
343
443
543
643
744
844
944
1044
1144
1244
1343
1443
1543
1643
1742
1842
1942
2042
2141
2241
2341
2441
2540
2640
2740
2840
2940
3040
3140

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 6% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
18213500
28114500
38014600
47815700
57615810
67515910
774151010
873151110
971151220
1070151320
1168151430
1267151530
1367151530
1464161640
1564161640
1662161750
1760161860
1860161860
1958161970
2058161970
2155172080
2254172090
23521721100
24521721100
25501821110
26491822110
27481822110
28481822120
29471823120
30461823130
31451823131

Wind in May

Winds average 8 mph in May.

Across May, daily wind ranges from about 7 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
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
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
257light breeze
267light breeze
277calm
287calm
297calm
307calm
317calm

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 5:44 AM to 5:16 AM, and sunset from 7:24 PM to 7:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:447:24
213.75:437:25
313.85:417:26
413.85:407:27
513.85:397:28
613.95:387:29
713.95:367:30
813.95:357:31
914.05:347:32
1014.05:337:33
1114.05:327:34
1214.15:317:35
1314.15:307:36
1414.15:297:37
1514.25:287:38
1614.25:277:39
1714.25:267:40
1814.35:257:41
1914.35:247:42
2014.35:237:43
2114.45:237:44
2214.45:227:45
2314.45:217:46
2414.45:207:47
2514.55:207:47
2614.55:197:48
2714.55:187:49
2814.55:187:50
2914.65:177:51
3014.65:177:52
3114.65:167:52

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 1.64 kWh/m² to a high of 6.24 kWh/m² in June across the year — May's 5.74 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.4Bright
35.4Bright
45.4Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
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 Troy?

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

6.1
Sightseeing
4th-best month of the year
4.2
Beach & pool
5th-best month of the year

May is a reasonable time to visit Troy for sightseeing.

What to pack for Troy in May

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

In May, Troy sees daytime highs around 71°F and nights near 53°F. Worth packing: rain gear and sun protection. About 13 days see rain.

rain gearsun protection

UV index in Troy 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 Troy peaks around June 21 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 21UV 9Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun10Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov3Moderate
Dec2Low

Air quality in Troy 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 Troy 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).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1117 µg/m³Oct 238 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar12Good
Apr12Moderate
May15Moderate
Jun17Moderate
Jul17Moderate
Aug15Moderate
Sep12Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Troy?

Troy sits at 40.0°N, 84.2°W, 827 ft above sea level, in United States. The nearest listed city is Piqua, 7.5 mi away.

Topography around Troy

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

Within 2 miles, the terrain around Troy has only modest variations in elevation — a maximum elevation change of 167 ft around an average of 846 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 433 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 991 ft.

The land around Troy is covered by grassland (29%), trees (27%) and artificial surfaces (22%) within 2 miles, cropland (60%) within 10 miles, and cropland (66%) within 50 miles.

2 miles
167 ft
10 miles
433 ft
50 miles
991 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Piqua 7.5 mi · Vandalia 11 mi · Huber Heights 14 mi · Sidney 17 mi · Trotwood 17 mi · Fairborn 18 mi · Riverside 19 mi · Dayton 19 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 Troy (40.0395°, -84.2033°, elevation 827 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).