Middletown weather in August

In August, Middletown sees average daytime highs of 83°F and overnight lows near 71°F, with 3.7 in of rain across 9.9 wet days and about 13.5 hours of daylight. It is the 2nd-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 84°F in the first days to 82°F by the end. The sky is clear or mostly clear about 34% of the time in August, and the air most often feels muggy.

Daylight stretches from about 14 h 06 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Middletown's 4th-clearest and 12th-windiest month. For the whole year in context, see Middletown's year-round climate.

Daytime high
83°
2nd warmest
Overnight low
71°
11th coldest
Rainfall
3.7 in
9.9 wet days
Daylight
13 h 36 min
5:20 AM – 6:54 PM
Cloud cover
55%
4th clearest
Wind
6 mph
12th windiest
Solar energy
5.34 kWh/m²
Travel score
5.9
out of 10

Middletown is town in New Castle County, Delaware, United States.

Density
674/km²
people per km²
Founded
1861

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 84°F in the first days to 82°F by the end.

A typical August day in Middletown reaches about 83°F in the afternoon and slips back to 71°F overnight — a 13°F spread between the day's warmth and the night's chill. On most days the high lands between 77°F and 89°F. Set against its neighbours, August runs about 2°F cooler than July and about 6°F warmer than September.

60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18572
28472
38472
48472
58472
68472
78472
88472
98471
108471
118471
128371
138371
148371
158371
168371
178371
188371
198370
208370
218370
228270
238270
248270
258269
268269
278269
288269
298269
308269
318168

How August really feels in Middletown

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.

Middletown weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan41° / 29°3.18.839.50.1
Feb43° / 30°2.98.9310.40.6
Mar52° / 38°4.010.31.811.72.7
Apr63° / 48°3.510.20.2135.5
May72° / 58°3.310.3014.16.6
Jun81° / 67°3.610.8014.76.1
Jul85° / 72°3.611.1014.55.2
Aug83° / 71°3.79.9013.55.9
Sep77° / 64°4.19.1012.37.0
Oct66° / 52°3.57.90116.3
Nov55° / 42°2.97.90.29.83.6
Dec46° / 34°3.78.91.69.31.1

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 20% of August, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15347
25446
35446
45446
55446
65446
75446
85446
95446
105347
115347
125347
135347
145347
155248
165248
175248
185248
195248
205446
215446
225446
235446
245446
255545
265545
275644
285644
295644
305743
315743

Chance of precipitation in August

Any precipitation

Middletown gets around 3.7 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 33% and peaks near 39% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
139
238
338
438
537
637
737
837
937
1036
1136
1236
1336
1435
1535
1634
1733
1832
1931
2030
2129
2229
2328
2427
2527
2626
2726
2826
2926
3026
3126

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 30% of days. Sticky, muggy-or-worse air turns up on roughly 62% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1192031363
2192031363
31102031363
42102030353
52102030353
62112030353
72112030343
82112029343
92112130343
102112130333
113112130333
123112130323
133112130323
143112130313
153112230313
163112231303
173112231293
184112331293
194122331282
204122332272
214122432272
224132432262
234132431262
244142431251
254152530251
265152529241
275162529241
285162628241
296172627231
306172627231
317172626221

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 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
286calm
296calm
306calm
316calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 06 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 66 minutes over August. Sunrise moves from 5:06 AM to 5:34 AM, and sunset from 7:12 PM to 6:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:067:12
214.15:077:11
314.05:087:10
414.05:097:09
514.05:107:08
613.95:117:06
713.95:127:05
813.95:137:04
913.85:137:03
1013.85:147:02
1113.85:157:00
1213.75:166:59
1313.75:176:58
1413.65:186:57
1513.65:196:55
1613.65:206:54
1713.55:216:52
1813.55:226:51
1913.45:236:50
2013.45:246:48
2113.45:256:47
2213.35:266:45
2313.35:276:44
2413.25:286:42
2513.25:296:41
2613.25:306:39
2713.15:316:38
2813.15:326:36
2913.05:336:35
3013.05:336:33
3113.05:346:31

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.34 kWh/m².

For context, solar energy here swings from a low near 1.88 kWh/m² to a high of 6.11 kWh/m² in June across the year — August's 5.34 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.4Bright
125.4Bright
135.4Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.1Bright
255.1Bright
265.1Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
314.9Bright
Planning a trip in August

Hazard calendar for Middletown

In seasonPeak

In August, Middletown sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Middletown sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Middletown?

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

5.9
Sightseeing
5th-best month of the year
6.9
Beach & pool
1st-best month of the year

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

What to pack for Middletown in August

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

In August, Middletown sees daytime highs around 83°F and nights near 71°F. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Middletown in August

The nearest coast averages about 76°F in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 29 mi away) is warmest in August at about 76°F and coldest in February near 37°F.

It's comfortable for a long swim from Jun 19 to Oct 3 — about 3.5 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan39Bracing
Feb37Bracing
Mar41Bracing
Apr49Bracing
May58Bracing
Jun67Cool
Jul74Refreshing
Aug76Warm
Sep73Refreshing
Oct64Cool
Nov53Bracing
Dec44Bracing

UV index in Middletown in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Middletown peaks around July 11 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 highHighModerateLowJul 11UV 8Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug6High
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

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

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1317 µg/m³Nov 128 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar13Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep12Good
Oct9Good
Nov8Good
Dec9Good
Location & terrain

Where is Middletown?

Middletown sits at 39.4°N, 75.7°W, 69 ft above sea level, in United States. The nearest listed city is Elkton, 12 mi away.

Topography around Middletown

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

Within 2 miles, the terrain around Middletown has only modest variations in elevation — a maximum elevation change of 151 ft around an average of 59 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 190 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,385 ft.

The land around Middletown is covered by grassland (38%) and trees (22%) within 2 miles, trees (36%) and cropland (28%) within 10 miles, and trees (44%) within 50 miles.

2 miles
151 ft
10 miles
190 ft
50 miles
1,385 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Elkton 12 mi · Bear 13 mi · Newark 16 mi · Wilmington 22 mi · Dover 22 mi · Aberdeen 24 mi · Bridgeton 25 mi · Edgewood 31 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 Middletown (39.4496°, -75.7163°, elevation 69 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).