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Delaware

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Delaware Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Delaware year round climate

  • Spring (March–May): Average 9.2–18.1°C, climate transitions from cold to warm, March has more rainfall, April starts to become dry. Common activities: Outdoor walks, flower viewing. Suggested clothing: Light jacket, long-sleeved shirt, and rain gear in March.
  • Summer (June–August): Average 23.1–26.4°C, hot and dry, less rainfall. Common activities: Beach activities, outdoor picnics. Suggested clothing: Light and breathable clothing, sun hat, sunscreen.
  • Autumn (September–November): Average 10.1–21.1°C, temperature gradually decreases, September has more rainfall, then becomes dry. Common activities: Maple leaf viewing, outdoor hiking. Suggested clothing: Comfortable jacket, long-sleeved shirt.
  • Winter (December–February): Average 4.0–5.9°C, cold and humid, more rainfall. Common activities: Indoor activities, museum visits. Suggested clothing: Warm jacket, hat, scarf, gloves.

Delaware climatological average

Annual average temperature: approx. 15°C / Annual rainfall: approx. 801 mm / Summer humidity: 60%–70% / Rainiest month: March

Delaware monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
4°C
138.1
February
5.9°C
60.5
March
9.2°C
166.5
April
14.3°C
43.8
May
18.1°C
0
June
23.1°C
0
July
26.4°C
0
August
24.7°C
42.2
September
21.1°C
113.8
October
14.9°C
34.9
November
10.1°C
46.6
December
5.4°C
155.3

Delaware weather for the next seven days

3/15
Sunday
Patchy rain nearby
13.3°C/4°C
3/16
Monday
Heavy rain
19.2°C/6.9°C
3/17
Tuesday
Heavy rain
5.5°C/-1.2°C
3/18
Wednesday
Partly Cloudy
4.6°C/-2.3°C
3/19
Thursday
Partly Cloudy
9.2°C/-0.8°C
3/20
Friday
Partly Cloudy
13°C/1.9°C
3/21
Saturday
Patchy rain nearby
11.5°C/6.3°C

Delaware Frequently Asked Questions and Useful Information for Travel

What are the top attractions in Delaware?

Delaware offers a diverse range of attractions. Popular choices include Cape Henlopen State Park for its natural beauty and beaches, Nemours Estate for its stunning architecture and gardens, and the Rehoboth Beach Boardwalk for a classic seaside experience. The Air Mobility Command Museum is also a fascinating stop for aviation enthusiasts.

Is Delaware a worthwhile destination to visit?

Absolutely! Delaware is known for its unique experiences, from beautiful beaches and scenic open spaces to vibrant city lights and historic locations. Whether you seek outdoor adventures, culinary delights, or cultural discoveries, your getaway to Delaware is sure to be memorable.

When is the best time to plan a trip to Delaware?

The shoulder seasons of spring (April to May) and fall (September to November) are ideal for mild weather and fewer crowds in Delaware. Summer (June to August) is the peak season for warm-weather activities, especially at the beaches. Fall is particularly beautiful with vibrant foliage and popular events like the Sea Witch Halloween Festival.

What fun activities can you do in Delaware?

Delaware is brimming with fun and discovery. You can explore unique beaches, enjoy beautiful natural wilderness, tour historic mansions, wander through charming gardens, and delve into rich history. Plus, enjoy tax-free shopping. Delaware offers endless opportunities for outdoor recreation, arts, culture, and vibrant events and festivals.

What are some must-see natural attractions in Delaware?

Delaware boasts several stunning natural attractions. Cape Henlopen State Park is a highlight, offering expansive beaches, walking trails, and scenic overlooks. The Delaware Water Gap National Recreation Area, while shared with Pennsylvania, offers breathtaking vistas and outdoor pursuits accessible from Delaware's western border. The DuPont State Recreational Forest provides opportunities for hiking and wildlife viewing.