Dayton weather in July

In July, Dayton sees average daytime highs of 83°F and overnight lows near 66°F, with 3.4 in of rain across 11.6 wet days and about 14.5 hours of daylight. It is the 1st-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 83°F through the month. The sky is clear or mostly clear about 33% of the time in July, and the air most often feels muggy.

Daylight stretches from about 14 h 48 min at the start of July to 14 h 12 min by month's end. Set against the rest of the year, July is Dayton's 3rd-clearest and 11th-windiest month. For the whole year in context, see Dayton's year-round climate.

Daytime high
83°
1st warmest
Overnight low
66°
12th coldest
Rainfall
3.4 in
11.6 wet days
Daylight
14 h 36 min
5:26 AM – 7:59 PM
Cloud cover
55%
3rd clearest
Wind
6 mph
11th windiest
Solar energy
6.2 kWh/m²
Travel score
5.6
out of 10

Dayton is city and county seat of Montgomery County, Ohio, United States.

Density
926/km²
people per km²
Founded
1796

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 83°F through the month.

A typical July day in Dayton reaches about 83°F in the afternoon and slips back to 66°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 77°F and 90°F. Set against its neighbours, July runs about 3°F warmer than June and on par with August.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18366
28366
38366
48366
58366
68366
78366
88366
98366
108366
118367
128367
138367
148467
158467
168467
178467
188467
198467
208467
218367
228367
238367
248367
258367
268367
278366
288366
298366
308366
318366

How July really feels in Dayton

Once humidity and wind are folded in, July 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

July sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Dayton weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan37° / 23°3.29.84.69.50.0
Feb40° / 25°2.79.24.110.40.2
Mar50° / 33°3.911.12.311.72.2
Apr63° / 44°4.612.70.5135.0
May72° / 54°4.613.3014.26.1
Jun80° / 63°4.212.6014.86.0
Jul83° / 66°3.411.6014.55.6
Aug82° / 65°3.210.1013.66.3
Sep76° / 57°2.77.8012.37.2
Oct64° / 46°2.98.40.210.95.9
Nov51° / 36°3.2919.82.6
Dec41° / 28°3.49.73.39.20.2

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 22% of July, with mostly cloudy or overcast conditions the remaining 45%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15347
25446
35446
45545
55545
65545
75545
85743
95743
105743
115743
125743
135743
145743
155644
165644
175545
185545
195446
205446
215446
225446
235446
245446
255545
265545
275545
285545
295545
305545
315545

Chance of precipitation in July

Any precipitation

Dayton gets around 3.4 in of rain over 11.6 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 37% and peaks near 40% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
140
240
339
439
539
638
738
837
937
1037
1137
1236
1336
1436
1536
1636
1736
1836
1937
2037
2137
2237
2337
2437
2537
2637
2736
2836
2936
3036
3136

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the muggy band about 33% of days. Sticky, muggy-or-worse air turns up on roughly 49% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1131725359
21317253510
31317253410
41317263410
51317263411
61217263411
71217263412
81217263412
91117263413
101116263413
111016263414
121016263415
13916263415
14915253416
15815253417
16815243518
17815243518
18815243519
19715233519
20715233420
21716233420
22716233420
23717233320
24717243320
25718243219
26718253218
27719253118
28720263017
29720273016
30821272916
31821272816

Wind in July

Winds average 6 mph in July.

Across July, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
285calm
295calm
305calm
315calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 14 h 48 min at the start of July to 14 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over July. Sunrise moves from 5:17 AM to 5:38 AM, and sunset from 8:04 PM to 7:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.85:178:04
214.85:178:04
314.85:188:03
414.85:188:03
514.75:198:03
614.75:198:03
714.75:208:03
814.75:208:02
914.75:218:02
1014.75:218:02
1114.75:228:01
1214.65:238:01
1314.65:238:01
1414.65:248:00
1514.65:258:00
1614.65:267:59
1714.55:267:59
1814.55:277:58
1914.55:287:57
2014.55:297:57
2114.45:307:56
2214.45:307:55
2314.45:317:55
2414.45:327:54
2514.35:337:53
2614.35:347:52
2714.35:357:51
2814.25:367:50
2914.25:367:49
3014.25:377:48
3114.25:387:47

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.2 kWh/m².

For context, solar energy here swings from a low near 1.64 kWh/m² to a high of 6.22 kWh/m² in June across the year — July's 6.2 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.4Intense
26.4Intense
36.4Intense
46.4Intense
56.4Intense
66.4Intense
76.4Intense
86.4Intense
96.3Intense
106.3Intense
116.3Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.2Intense
176.2Intense
186.2Intense
196.2Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.0Intense
256.0Intense
266.0Intense
276.0Intense
286.0Bright
296.0Bright
306.0Bright
315.9Bright
Planning a trip in July

Is July a good time to visit Dayton?

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

5.6
Sightseeing
6th-best month of the year
6.8
Beach & pool
2nd-best month of the year

July is a reasonable time to visit Dayton for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Dayton in July

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

In July, Dayton sees daytime highs around 83°F and nights near 66°F. Pack light clothes and sun protection. Worth having: rain gear. About 12 days see rain.

light clothessun protectionrain gear

UV index in Dayton in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Dayton peaks around June 20 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 20UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun10Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov3Moderate
Dec2Low

Air quality in Dayton in July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July falls, not just the annual average.

Air quality in Dayton 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 Dayton?

Dayton sits at 39.8°N, 84.2°W, 738 ft above sea level, in United States. The nearest listed city is Riverside, 3.7 mi away.

Topography around Dayton

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

Within 2 miles, the terrain around Dayton has only modest variations in elevation — a maximum elevation change of 207 ft around an average of 764 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 430 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,089 ft.

The land around Dayton is covered by artificial surfaces (55%) and trees (20%) within 2 miles, trees (42%), grassland (26%) and artificial surfaces (20%) within 10 miles, and cropland (59%) and trees (25%) within 50 miles.

2 miles
207 ft
10 miles
430 ft
50 miles
1,089 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: Riverside 3.7 mi · Kettering 5.0 mi · Huber Heights 6.8 mi · Trotwood 6.8 mi · Beavercreek 7.5 mi · Vandalia 9.3 mi · Centerville 9.3 mi · Miamisburg 9.3 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 Dayton (39.7589°, -84.1916°, elevation 738 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).