Delaware City Weather in September

September in Delaware City averages 26°C (79°F) during the day and 16°C (61°F) at night. Quite a bit of rainfall is typical this month, with around 110 mm (4.3 in) on average. An umbrella is a good idea.

Rainfall in Delaware City in September

Looking at the last 30 years, the data shows about 9 days with rain, averaging 110 mm (4.3 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Delaware City in September

September in Delaware City brings typical temperatures with highs around 26°C (79°F) and lows of 16°C (61°F). This kind of day-to-night contrast is typical for this time of year. With overnight lows of 16°C (61°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Delaware City in September

There are approximately 218 hours of sunshine this month, resulting in mostly clear days.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. May typically offers the best weather for Delaware City.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Delaware City's climate page.

Delaware City Temperature in September

Min Temperature 16°C (61°F)  

Max Temperature 26°C (79°F)  

Chance of Rain 29%  

Precipitation 110 mm (4.3 in)  

Rainy days 9 days  

Humidity 72% *  

Sunshine 218 hours *  

Percentage Sunshine 59% *  

* Data from: Philadelphia, the United States of America (55 KM, 34 Miles).

What to Wear in Delaware City in September

Warm but pleasant conditions in Delaware City in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Delaware City in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Delaware City's climate page.

More climate data for Delaware City

Temperature Rainfall Sunshine Humidity

See the full Delaware City climate overview or explore weather in the United States of America.