Wilmington weather in July

In July, Wilmington sees average daytime highs of 86°F and overnight lows near 70°F, with 3.9 in of rain across 10.9 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 86°F through the month. The sky is clear or mostly clear about 29% 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 Wilmington's 5th-clearest and 11th-windiest month. For the whole year in context, see Wilmington's year-round climate.

Daytime high
86°
1st warmest
Overnight low
70°
12th coldest
Rainfall
3.9 in
10.9 wet days
Daylight
14 h 36 min
4:51 AM – 7:24 PM
Cloud cover
58%
5th clearest
Wind
6 mph
11th windiest
Solar energy
6.02 kWh/m²
Travel score
5.0
out of 10

Wilmington is seat of New Castle County, and largest city in Delaware, United States.

Density
1,615/km²
people per km²
Founded
1638

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 86°F through the month.

A typical July day in Wilmington reaches about 86°F in the afternoon and slips back to 70°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 79°F and 93°F. Set against its neighbours, July runs about 4°F warmer than June and about 2°F warmer than August.

60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18569
28569
38569
48569
58569
68569
78569
88670
98670
108670
118670
128670
138670
148670
158670
168670
178671
188671
198671
208671
218671
228671
238671
248671
258671
268571
278570
288570
298570
308570
318570

How July really feels in Wilmington

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.

Wilmington 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
Jan41° / 28°3.29.23.69.50.1
Feb43° / 29°3.08.73.210.40.6
Mar52° / 36°4.110.72.111.72.7
Apr63° / 46°3.610.50.3135.4
May73° / 55°3.510.9014.26.5
Jun81° / 65°3.910.4014.86.0
Jul86° / 70°3.910.9014.55.0
Aug83° / 68°3.910.4013.65.6
Sep77° / 61°4.29.6012.36.9
Oct66° / 50°3.68.1010.96.3
Nov55° / 40°3.07.90.29.83.6
Dec45° / 33°3.991.99.21.1

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% 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 48%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
25050
35050
45149
55149
65248
75248
85248
95347
105446
115446
125446
135446
145446
155446
165347
175347
185248
195149
205149
215149
225050
235050
245050
254951
265050
275050
285050
295050
305050
315149

Chance of precipitation in July

Any precipitation

Wilmington gets around 3.9 in of rain over 10.9 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 35% and peaks near 41% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
134
234
333
433
533
632
732
832
931
1031
1131
1231
1331
1431
1532
1632
1733
1834
1935
2036
2137
2238
2338
2439
2540
2640
2740
2840
2941
3041
3141

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 30% of days. Sticky, muggy-or-worse air turns up on roughly 59% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
18182330201
28182330211
38172330221
47172329221
57172329231
67172429231
77162429241
87162429241
97162329251
107152329251
116152329261
126142329261
136142230261
146142230271
156142230281
166132130282
175132130292
185122131292
195122131302
205122031302
215112032302
224112032312
234112132312
244102132312
254102132311
264102232311
274102232311
284102232311
295102331301
305102332301
315102331301

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
215calm
225calm
235calm
245calm
255calm
265calm
275calm
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 4:42 AM to 5:04 AM, and sunset from 7:29 PM to 7:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.84:427:29
214.84:427:29
314.84:437:29
414.84:437:29
514.74:447:29
614.74:457:28
714.74:457:28
814.74:467:28
914.74:467:28
1014.74:477:27
1114.74:487:27
1214.64:487:26
1314.64:497:26
1414.64:507:26
1514.64:507:25
1614.64:517:24
1714.54:527:24
1814.54:537:23
1914.54:537:23
2014.54:547:22
2114.44:557:21
2214.44:567:21
2314.44:577:20
2414.44:587:19
2514.34:587:18
2614.34:597:17
2714.35:007:17
2814.25:017:16
2914.25:027:15
3014.25:037:14
3114.25:047:13

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.02 kWh/m².

For context, solar energy here swings from a low near 1.85 kWh/m² to a high of 6.11 kWh/m² in June across the year — July's 6.02 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.3Intense
66.3Intense
76.2Intense
86.2Intense
96.2Intense
106.2Intense
116.2Intense
126.2Intense
136.2Intense
146.1Intense
156.1Intense
166.1Intense
176.0Intense
186.0Intense
196.0Bright
206.0Bright
215.9Bright
225.9Bright
235.9Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in July

Hazard calendar for Wilmington

In seasonPeak

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

Wilmington 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 July a good time to visit Wilmington?

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

5.0
Sightseeing
7th-best month of the year
6.8
Beach & pool
2nd-best month of the year

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

What to pack for Wilmington in July

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

In July, Wilmington sees daytime highs around 86°F and nights near 70°F. Pack light clothes and sun protection. Worth having: rain gear. About 11 days see rain.

light clothessun protectionrain gear

UV index in Wilmington 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 Wilmington 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 Wilmington 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 Wilmington 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 Wilmington?

Wilmington sits at 39.7°N, 75.5°W, 92 ft above sea level, in United States. The nearest listed city is Bear, 9.9 mi away.

Topography around Wilmington

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

Within 2 miles, the terrain around Wilmington has only modest variations in elevation — a maximum elevation change of 364 ft around an average of 82 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 545 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,483 ft.

The land around Wilmington is covered by artificial surfaces (47%) and trees (32%) within 2 miles, trees (51%) within 10 miles, and trees (53%) within 50 miles.

2 miles
364 ft
10 miles
545 ft
50 miles
1,483 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
July weather nearby: Bear 9.9 mi · Newark 12 mi · Chester 12 mi · West Chester 15 mi · Springfield 17 mi · Elkton 18 mi · Drexel Hill 19 mi · Havertown 21 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 Wilmington (39.746°, -75.5466°, elevation 92 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). 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).