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Delaware weather in September

Planning a journey to Delaware this September and curious over the weather conditions to await? Your essential details are found on this page, answering your query:

What is the weather like in Delaware in September?

Delaware is a region in the United States of America. September in Delaware generally has warm temperatures, with high precipitation.

You can expect warm maximum daytime temperatures of around 26°C and nighttime temperatures around 16°C in Dover.

In September, precipitation varies across different areas. From high rainfall in Smyrna with an average of 102 mm to high rainfall in Seaford with 138 mm.

For a closer look at September's conditions in Delaware, see the map below. For a more detailed look at Delaware's yearly weather, check out our Delaware climate page.

Where to go in Delaware in September

Find more information for the most popular destinations in the Delaware on the map below. Click on a destination dot for more detailes.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

Popular destinations

What is the weather like in September for the 5 most popular destinations in Delaware?

Dover

In September Dover generally has high temperatures with maximum daytime temperatures around 26°C, minimum nighttime temperatures around 16°C and high monthly rainfall. So on average the conditions are pleasant that month.

Dover
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
29°C 
20°C 
110 mm 
11 days 
26°C 
16°C 
109 mm 
8 days 
October   >> October
>>  
20°C 
10°C 
143 mm 
11 days 
Climate in Dover

Newark

In September Newark generally has high temperatures with maximum daytime temperatures around 26°C, minimum nighttime temperatures around 15°C and high monthly rainfall. So on average the conditions are pleasant that month.

Newark
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
29°C 
18°C 
260 hours 
118 mm 
10 days 
26°C 
15°C 
218 hours 
118 mm 
9 days 
October   >> October
>>  
19°C 
8°C 
200 hours 
129 mm 
11 days 
Climate in Newark

Seaford

In September Seaford generally has high temperatures with maximum daytime temperatures around 27°C, minimum nighttime temperatures around 16°C and high monthly rainfall. So on average the conditions are pleasant that month.

Seaford
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
30°C 
19°C 
110 mm 
10 days 
27°C 
16°C 
138 mm 
9 days 
October   >> October
>>  
21°C 
10°C 
138 mm 
11 days 
Climate in Seaford

Harrington

In September Harrington generally has high temperatures with maximum daytime temperatures around 27°C, minimum nighttime temperatures around 16°C and high monthly rainfall. So on average the conditions are pleasant that month.

Harrington
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
30°C 
19°C 
117 mm 
11 days 
27°C 
16°C 
119 mm 
9 days 
October   >> October
>>  
21°C 
9°C 
148 mm 
12 days 
Climate in Harrington

Christiana

In September Christiana generally has high temperatures with maximum daytime temperatures around 26°C, minimum nighttime temperatures around 15°C and high monthly rainfall. So on average the conditions are pleasant that month.

Christiana
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
29°C 
19°C 
260 hours 
112 mm 
9 days 
26°C 
15°C 
218 hours 
112 mm 
8 days 
October   >> October
>>  
20°C 
9°C 
200 hours 
127 mm 
11 days 
Climate in Christiana

Is your destination not in the list? Have a look at other destinations in Delaware, in the United States of America.

Is September the best time to visit Delaware?

Given the typically pleasant weather conditions in Dover, September might be a good time to visit Delaware. However, the weather conditions may vary depending on your destination.

Generally speaking, the best visiting conditions can be found in May offering mostly perfect weather in Dover. In contrast, January, February and December tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in Delaware. Interested in the weather conditions in a specific month? Select the month below.

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  • Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

    Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.