Delaware Weather Forecast
Delaware weather: 69°F, clear. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Delaware weather in September
Weather map for Delaware
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Climate in Delaware month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 40° | 26° | 3,5 in | ★★☆☆☆ |
| February | 44° | 29° | 2,8 in | ★★☆☆☆ |
| March | 59° | 40° | 4,8 in | ★★★☆☆ |
| April | 66° | 48° | 3,6 in | ★★★★☆ |
| May | 73° | 57° | 4,3 in | ★★★★☆ |
| June | 84° | 66° | 2,9 in | ★★★★☆ |
| July | 87° | 71° | 6,1 in | ★★★★☆ |
| August | 83° | 68° | 3,0 in | ★★★★☆ |
| September | 78° | 64° | 4,2 in | ★★★★☆ |
| October | 69° | 52° | 1,5 in | ★★★★☆ |
| November | 57° | 42° | 1,9 in | ★★★★☆ |
| December | 46° | 33° | 4,4 in | ★★☆☆☆ |
Climate type: Continental. Source: Open-Meteo archive (ERA5).
Best time to visit Delaware
Go in June, August and October. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- A packable rain shell - 2 of the next 7 days carry a real chance of rain
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
How Delaware compares with nearby places
Annual averages, and the difference against Delaware.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Philadelphia International Airport | 52 mi | 56°F | 33°F cooler | 44 in |
| Maryland | 53 mi | 57°F | about the same | 50 in |
| ZIP Code 19103 | 58 mi | 56°F | 33°F cooler | 43 in |
| Philadelphia County | 58 mi | 56°F | 33°F cooler | 43 in |
| Philadelphia | 58 mi | 56°F | 33°F cooler | 43 in |
See the Delaware forecast by time range
Delaware weather - more answers
Explore Delaware
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is Delaware?
Delaware is a state in United States. Its coordinates are 39.1582, -75.5244. It lies in North America.
What is the weather like in Delaware right now?
It is currently 69°F (21°C) with clear. Humidity is 77% and wind is 5 mph.
When is the best time to visit Delaware?
June, August and October offer the most comfortable conditions in Delaware, which has a continental climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is Delaware in?
Delaware observes America/New_York (UTC-04:00). The local time is 10:06 AM.
How many people live in Delaware?
Delaware has a population of approximately 1 million.
What is the nearest airport to Delaware?
The closest airports are Philadelphia International Airport (PHL), 52 mi away, Ronald Reagan Washington National Airport (DCA), 84 mi away and Washington Dulles International Airport (IAD), 105 mi away.
What are the top things to do in Delaware?
Popular options include National Mall, Statue of Liberty (UNESCO World Heritage Site), Statue of Liberty, Hudson River, Empire State Building and Times Square.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (us-states) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 24, 2026 at 10:06 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
