Hamilton weather in May

In May, Hamilton sees average daytime highs of 73°F and overnight lows near 55°F, with 4.6 in of rain across 12.8 wet days and about 14.1 hours of daylight. It is the 5th-warmest and 2nd-wettest month of the year here.

Highs climb over the month, from about 69°F in the first days to 77°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 36 min at the start of May to 14 h 30 min by month's end. Set against the rest of the year, May is Hamilton's 7th-clearest and 8th-windiest month. For the whole year in context, see Hamilton's year-round climate.

Daytime high
73°
5th warmest
Overnight low
55°
8th coldest
Rainfall
4.6 in
12.8 wet days
Daylight
14 h 12 min
5:30 AM – 7:39 PM
Cloud cover
65%
7th clearest
Wind
7 mph
8th windiest
Solar energy
5.72 kWh/m²
Travel score
6.2
out of 10

Hamilton is city in Butler County, Ohio, United States.

Density
1,092/km²
people per km²
Founded
1794

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 69°F in the first days to 77°F by the end.

A typical May day in Hamilton reaches about 73°F in the afternoon and slips back to 55°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 61°F and 84°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)
16850
26951
36951
46951
57052
67052
77052
87153
97153
107153
117154
127254
137254
147255
157355
167355
177355
187356
197456
207456
217457
227457
237557
247558
257658
267658
277659
287659
297759
307760
317760

How May really feels in Hamilton

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.

Hamilton 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
Jan38° / 24°3.310.34.39.50.0
Feb41° / 26°2.99.23.710.50.3
Mar51° / 34°4.111.3211.72.5
Apr64° / 45°4.712.50.5135.2
May73° / 55°4.612.8014.16.2
Jun81° / 64°4.212.3014.75.9
Jul84° / 67°3.611.2014.55.4
Aug83° / 66°3.29.9013.56.0
Sep77° / 58°2.78012.37.2
Oct65° / 46°3.08.40.1116.0
Nov52° / 37°3.39.10.89.82.8
Dec42° / 29°3.610.139.30.2

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 15% of May, with mostly cloudy or overcast conditions the remaining 61%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13763
23763
33763
43664
53664
63664
73763
83862
93763
103763
113763
123763
133862
143862
153862
163862
173961
183961
193961
203961
214060
224060
234159
244159
254357
264357
274258
284258
294357
304357
314258

Chance of precipitation in May

Any precipitation

Hamilton gets around 4.6 in of rain over 12.8 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 41% and peaks near 43% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
143
243
343
443
543
643
743
843
943
1043
1143
1243
1343
1443
1542
1642
1742
1842
1941
2041
2141
2241
2340
2440
2539
2639
2739
2838
2938
3038
3138

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 58% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
18014600
27715710
37615810
47516810
57416910
672161020
771161120
869161230
968161330
1066161440
1165161540
1263161650
1361161760
1461161760
1559161870
1658161970
1756162080
1856162080
1954162190
2053162290
21511623100
22501623110
23481623111
24471724121
25461724131
26451724131
27441724141
28441724141
29431824151
30421823161
31411823171

Wind in May

Winds average 7 mph in May.

Across May, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
77light breeze
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 36 min at the start of May to 14 h 30 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 5:46 AM to 5:19 AM, and sunset from 7:25 PM to 7:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:467:25
213.75:457:26
313.75:447:27
413.75:437:28
513.85:417:28
613.85:407:29
713.95:397:30
813.95:387:31
913.95:377:32
1014.05:367:33
1114.05:357:34
1214.05:347:35
1314.15:337:36
1414.15:327:37
1514.15:317:38
1614.25:307:39
1714.25:297:40
1814.25:287:41
1914.25:277:42
2014.35:267:43
2114.35:267:44
2214.35:257:45
2314.45:247:45
2414.45:237:46
2514.45:237:47
2614.45:227:48
2714.55:217:49
2814.55:217:50
2914.55:207:50
3014.55:207:51
3114.55:197:52

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 1.67 kWh/m² to a high of 6.21 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
35.4Bright
45.4Bright
55.4Bright
65.4Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
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
296.0Bright
306.0Intense
316.0Intense
Planning a trip in May

Is May a good time to visit Hamilton?

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

6.2
Sightseeing
2nd-best month of the year
4.6
Beach & pool
5th-best month of the year

May is a reasonable time to visit Hamilton for sightseeing.

What to pack for Hamilton in May

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

In May, Hamilton sees daytime highs around 73°F and nights near 55°F. Worth packing: light clothes, rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

UV index in Hamilton in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Hamilton peaks around June 21 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 21UV 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 Hamilton 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 Hamilton 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 1217 µg/m³Oct 228 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar12Good
Apr12Good
May14Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Hamilton?

Hamilton sits at 39.4°N, 84.6°W, 594 ft above sea level, in United States. The nearest listed city is Fairfield, 3.7 mi away.

Topography around Hamilton

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

Within 2 miles, the terrain around Hamilton has only modest variations in elevation — a maximum elevation change of 308 ft around an average of 643 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 558 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 876 ft.

The land around Hamilton is covered by trees (34%), artificial surfaces (34%) and grassland (22%) within 2 miles, trees (39%) and grassland (31%) within 10 miles, and trees (41%) and cropland (39%) within 50 miles.

2 miles
308 ft
10 miles
558 ft
50 miles
876 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Fairfield 3.7 mi · Forest Park 8.1 mi · Middletown 12 mi · Oxford 12 mi · White Oak 13 mi · Mason 14 mi · Norwood 17 mi · Cincinnati 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 Hamilton (39.3995°, -84.5613°, elevation 594 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).