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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
6/15
Monday
Patchy rain nearby
28.9°C/18.2°C
6/16
Tuesday
Sunny
25.7°C/14.9°C
6/17
Wednesday
Patchy rain nearby
30.1°C/16.8°C
6/18
Thursday
Heavy rain
34.8°C/21.9°C
6/19
Friday
Heavy rain
27.2°C/19.7°C
6/20
Saturday
Sunny
24.7°C/15.9°C
6/21
Sunday
Partly Cloudy
28.3°C/16.6°C
