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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 48–64°F, 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 73–79°F, hot and dry, less rainfall. Common activities: Beach activities, outdoor picnics. Suggested clothing: Light and breathable clothing, sun hat, sunscreen.
  • Autumn (September–November): Average 50–69°F, 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 39–42°F, 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. 59.0°F / Annual rainfall: approx. 801 mm / Summer humidity: 60%–70% / Rainiest month: March

Delaware monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
39.2°F
138.1
February
42.6°F
60.5
March
48.6°F
166.5
April
57.7°F
43.8
May
64.6°F
0
June
73.6°F
0
July
79.5°F
0
August
76.5°F
42.2
September
70°F
113.8
October
58.8°F
34.9
November
50.2°F
46.6
December
41.7°F
155.3

Delaware weather for the next seven days

9/16
Wednesday
Sunny
81.1°F/60.1°F
9/17
Thursday
Sunny
86.6°F/65°F
9/18
Friday
Partly Cloudy
83.3°F/69.5°F
9/19
Saturday
Patchy rain nearby
74.5°F/66.3°F
9/20
Sunday
Patchy rain nearby
80.6°F/66.9°F
9/21
Monday
Patchy rain nearby
73.6°F/67.1°F
9/22
Tuesday
Overcast
79.2°F/71.4°F