Wilmington, DE weather in July
Wilmington is warm and often humid in July, with frequent rain: highs average 87°F and nights drop to about 68°F. Rain falls on about 10 days. This is the peak of the warm season in Wilmington.
- Normal high
- 87°F
- Normal low
- 68°F
- Wet days
- 10
- 4.4 in total
- Muggy days
- 17
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 86°F | 86°F |
| Normal low | 67°F | 68°F |
| Chance of a wet day | 33% | 32% |
| Sunrise / sunset | 5:37 am / 8:34 pm | 6:00 am / 8:16 pm |
| Daylight | 14.9 h | 14.3 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical July day
- 6 am73°Fdew point 66°F
- 9 am79°Fdew point 65°F
- Noon84°Fdew point 64°F
- 3 pm86°Fdew point 63°F
- 6 pm83°Fdew point 64°F
- 9 pm78°Fdew point 65°F
NOAA hourly normals (local standard time) from Philadelphia Intl Airport (19 mi away); average wind 8 mph; clear or few clouds in 68% of daytime hours, mostly cloudy or overcast in 23%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F2 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph18 of 31
- Hot dayshigh 90°F or more10 of 31
- Muggy daysdaily mean dew point 65°F or more17 of 31
- Wet daysat least 0.01 in of rain or melted snow10 of 31
- Notable rainat least 0.10 in7 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per July, counted from daily records for each year 1991-2020.
Rain in July
Normal precipitation is 4.4 in; a dry July brings about 3.1 in and a wet one about 6.0 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more.
How July varies from year to year
- Warmest July, 1991-20202011: average high 91°F
- Coolest July2000: average high 81°F
- Wettest July2004: 8.2 in
- Driest July1999: 0.9 in
- Highest reading103°F (July 7, 2010)
- Lowest reading52°F (July 3, 2001)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
July compared with June and August
| June | July | August | |
|---|---|---|---|
| Normal high | 82°F | 87°F | 85°F |
| Normal low | 63°F | 68°F | 67°F |
| Wet days | 11 | 10 | 9 |
| Comfortable days | 7 | 2 | 3 |
| Daylight | 14.9 h | 14.7 h | 13.7 h |
Highs change by +5°F from June and -2°F into August.
Nearby alternatives in July
- Cooler: Montauk, NY209 mi · high 80°F · 9 wet days
How Wilmington ranks in July
- Normal high197th warmest of 378 cities; 2nd of 2 in Delaware
- Wet days222nd driest of 378
- Comfortable days164th most of 340
What to pack for Wilmington in July
- Light, breathable clothing – highs near 87°F and about 17 muggy days
- A rain jacket or umbrella – rain on about 10 days
- A swimsuit – about 18 beach days
- Sunglasses and sunscreen – about 14.7 hours of daylight and highs near 87°F
Heating and cooling
July has 0 heating degree days and 389 cooling degree days (base 65°F), 7% of the year's total heating and cooling demand.
Questions
How hot is Wilmington in July?
The normal high is 87°F and the normal low is 68°F. From 1991 to 2020 the hottest July reading was 103°F (most recently on July 7, 2010).
Does it rain a lot in Wilmington in July?
About 10 days in July have at least 0.01 in of precipitation, and the normal total is 4.4 in. The wettest July in 1991-2020 was in 2004 (8.2 in); the driest was in 1999 (0.9 in).
Is July a good time to visit Wilmington?
July ranks 7th of 12 months on our comfort score for Wilmington (50 out of 100). It has about 2 comfortable days and about 10 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall and snow depth: Wilmington New Castle Co Airport (USW00013781), 5.8 mi SSW of the city center, 79 ft . NOAA normals and daily records, 1991-2020.
- Frost dates: Wilmington Porter Rsch (USC00079605), 1.9 mi N of the city center, 270 ft (179 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Philadelphia Intl Airport (USW00013739), 19 mi ENE of the city center, 10 ft (81 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Cloud cover: Millville Muni Airport (USW00013735), 37 mi SE of the city center, 70 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Philadelphia International Airport (724080-13739), 19 mi ENE of the city center, 7 ft (84 ft lower than the city). Hourly observations, 1991-2020.