Defiance weather in August

In August, Defiance sees average daytime highs of 81°F and overnight lows near 63°F, with 3.4 in of rain across 9.9 wet days and about 13.7 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 81°F through the month. The sky is clear or mostly clear about 35% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 14 h 12 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Defiance's 3rd-clearest and 12th-windiest month. For the whole year in context, see Defiance's year-round climate.

Daytime high
81°
2nd warmest
Overnight low
63°
11th coldest
Rainfall
3.4 in
9.9 wet days
Daylight
13 h 42 min
5:51 AM – 7:32 PM
Cloud cover
55%
3rd clearest
Wind
6 mph
12th windiest
Solar energy
5.42 kWh/m²
Travel score
6.5
out of 10

Defiance is city in and the county seat of Defiance County, Ohio, United States.

Density
534/km²
people per km²
Founded
1822

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 81°F through the month.

A typical August day in Defiance reaches about 81°F in the afternoon and slips back to 63°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 73°F and 88°F. Set against its neighbours, August runs about 2°F cooler than July and about 6°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18264
28264
38264
48264
58264
68264
78264
88264
98264
108164
118163
128163
138163
148163
158163
168163
178163
188163
198163
208163
218162
228162
238162
248162
258062
268062
278062
288062
298061
308061
318061

How August really feels in Defiance

Once humidity and wind are folded in, August 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

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

Defiance weather by month

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

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan33° / 20°2.810.169.40.0
Feb37° / 22°2.38.54.810.30.0
Mar48° / 30°3.210.63.111.71.6
Apr60° / 41°3.9120.713.14.6
May71° / 52°4.113.2014.36.0
Jun80° / 61°3.911.5014.96.3
Jul83° / 65°3.411.1014.75.7
Aug81° / 63°3.49.9013.76.5
Sep75° / 55°2.58.2012.37.1
Oct63° / 44°2.790.110.95.6
Nov49° / 34°3.08.91.39.72.2
Dec38° / 26°2.69.23.99.10.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 46%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25446
35446
45446
55545
65446
75446
85446
95347
105347
115347
125347
135347
145347
155347
165347
175347
185347
195347
205347
215347
225347
235347
245446
255446
265446
275446
285545
295644
305644
315644

Chance of precipitation in August

Any precipitation

Defiance gets around 3.4 in of rain over 9.9 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 32% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
134
233
333
433
533
632
732
832
933
1033
1133
1233
1333
1433
1533
1633
1733
1833
1933
2033
2132
2232
2332
2431
2530
2629
2729
2828
2928
3027
3127

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the comfortable band about 26% of days. Sticky, muggy-or-worse air turns up on roughly 34% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
111262825101
211262825101
311262725101
411262724101
512262724101
612262624101
713272624101
813272524101
913272525101
1014272425101
1114272425101
121427242590
131427242590
141428232690
151428232680
161428232680
171428232770
181428232770
191427242870
201527242870
211526242860
221526242860
231626242860
241725242860
251725242850
261825242750
271925242750
282025242650
292125242550
302325242450
312425232450

Wind in August

Winds average 6 mph in August, the calmest month.

Across August, daily wind ranges from about 6 mph on the calmest days to 7 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
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 12 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over August. Sunrise moves from 5:36 AM to 6:07 AM, and sunset from 7:51 PM to 7:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.25:367:51
214.25:377:50
314.25:387:48
414.15:397:47
514.15:407:46
614.15:417:45
714.05:427:44
814.05:437:42
913.95:447:41
1013.95:457:40
1113.95:467:39
1213.85:477:37
1313.85:487:36
1413.85:497:34
1513.75:507:33
1613.75:517:32
1713.65:537:30
1813.65:547:29
1913.55:557:27
2013.55:567:26
2113.55:577:24
2213.45:587:23
2313.45:597:21
2413.36:007:19
2513.36:017:18
2613.26:027:16
2713.26:037:15
2813.16:047:13
2913.16:057:11
3013.16:067:10
3113.06:077:08

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.42 kWh/m².

For context, solar energy here swings from a low near 1.58 kWh/m² to a high of 6.3 kWh/m² in June across the year — August's 5.42 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.6Bright
105.6Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.4Bright
165.4Bright
175.4Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.1Bright
275.1Bright
285.1Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in August

Is August a good time to visit Defiance?

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

6.5
Sightseeing
2nd-best month of the year
6.7
Beach & pool
2nd-best month of the year

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

What to pack for Defiance in August

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

In August, Defiance sees daytime highs around 81°F and nights near 63°F. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

UV index in Defiance in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Defiance peaks around June 18 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 18UV 9Dec 21UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May7Very high
Jun9Very high
Jul8Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov3Moderate
Dec1Low

Air quality in Defiance in August

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Defiance is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (October, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1316 µg/m³Oct 228 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar14Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug15Moderate
Sep12Moderate
Oct8Good
Nov9Good
Dec10Good
Location & terrain

Where is Defiance?

Defiance sits at 41.3°N, 84.4°W, 676 ft above sea level, in United States. The nearest listed city is Bowling Green, 37 mi away.

Topography around Defiance

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

Within 2 miles, the terrain around Defiance has only modest variations in elevation — a maximum elevation change of 138 ft around an average of 709 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 223 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 781 ft.

The land around Defiance is covered by trees (34%), grassland (23%) and artificial surfaces (20%) within 2 miles, cropland (66%) and trees (20%) within 10 miles, and cropland (73%) within 50 miles.

2 miles
138 ft
10 miles
223 ft
50 miles
781 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Bowling Green 37 mi · New Haven 37 mi · Lima 40 mi · Findlay 40 mi · Fort Wayne 42 mi · Perrysburg 42 mi · Sylvania 45 mi · Adrian 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 Defiance (41.2845°, -84.3558°, elevation 676 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).