If you plan to visit Wilmington in September, the weather is typically alright, with an average high temperature of +81°F during the day and approximately 7 sunny days. Expect some rainy, though, as there are typically 19 rainy days in the month and around 181 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flightsin one click on Avionero.
Average weather
☀️
+81°F
Avg. max. temperature
+50°F
Min.
+97°F
Max.
181 mm
Total precipitation
79%
Avg. humidity
2 m/s
Avg. wind
7 ☀️
Sunny Days
4 ⛅️
Cloudy
19 🌦
Rainy
Our opinion: Wilmington has OK weather in September.
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Average temperature in Wilmington in September
Here are the expected maximum, average and minimum temperatures in Wilmington for September based on the historical data.
Last Year
Historical Data
Going from a maximum of +93°F during the day to a minimum of +55°F during the night, the temperature in September averages around +82°F.
The average maximum temperature goes down 14% by the end of the month, compared with the beginning of the month, from +82°F to +77°F.
Is Wilmington warm or cold in September?
Wilmington is typically warm in September.
Maximum temperatures go down compared to the previous month from +84°F to +81°F. The minimum temperature also goes down from +75°F to +70°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how September is compared to other months in Wilmington:
Climate in Wilmington in September
Wilmington weather looks like this, on average, in September and the surrounding months.
August
September
October
Avg. temperature
+84°F
+81°F
+73°F
Min. temperature
+57°F
+50°F
+34°F
Max. temperature
+97°F
+97°F
+95°F
Rainfall
202 mm
181 mm
96 mm
Wind
2 m/s
2 m/s
2 m/s
Humidity
80%
79%
75%
Air pressure
1015 HPa
1016 HPa
1017 HPa
Sunny days
4
7
12
Cloudy days
3
4
7
Rainy days
24
19
12
Snowy days
0
0
0
September weather is still as ok as in August.It’s getting colder in September. From +84°F in the day, the average maximum temperature lowers to +81°F.As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 202 mm to 181 mm.It feels drier, as humidity decreases from 80% to 79%.The average wind speed doesn’t change much during September, staying around 2 m/s.The good news is there are likely to be more sunny days in September, from 4 to 7.
But maybe it is worth considering traveling in October as the weather gets better.
Wind speed in Wilmington in September based on historical data.
Last Year
Historical Data
The average wind speed is 2 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Wilmington is gradually increasing during September, going from 3 m/s to 3 m/s over the course of the month.
Rain
Amount of rainfall in mm during September in Wilmington based on historical data.
Last Year
Historical Data
Typically, there is a 37% chance of rain on an average day in September, with total rainfall of approximately 126 mm. The maximum amount of rainfall per day is around 26 mm, which is moderate rain.September is a pretty wet month with over 11 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
September is one of the rainiest months in Wilmington, here is a comparison with other months, total mm:
Wilmington wettest month is August, where a typical day has a 77% chance of precipitation and 202 mm of rainfall per day. April, on the other hand, is the driest month with a mere 43% chance of precipitation and 88 mm of rainfall per day.
How was the weather last September in Wilmington?
This is the weather in Wilmington in September 2024:
1 September
☀️
+82°F
2 September
☀️
+82°F
3 September
☀️
+85°F
4 September
☀️
+92°F
5 September
☀️
+93°F
6 September
☀️
+93°F
7 September
☀️
+92°F
8 September
☀️
+89°F
9 September
☀️
+85°F
10 September
☀️
+87°F
11 September
☀️
+88°F
12 September
☀️
+88°F
13 September
☀️
+86°F
14 September
☀️
+85°F
15 September
☀️
+79°F
16 September
☀️
+81°F
17 September
☀️
+84°F
18 September
☀️
+80°F
19 September
☀️
+82°F
20 September
☀️
+82°F
21 September
☁️
+79°F
22 September
☁️
+74°F
23 September
🌧️
+66°F
24 September
☀️
+83°F
25 September
☀️
+87°F
26 September
🌧️
+80°F
27 September
☁️
+74°F
28 September
☁️
+74°F
29 September
☁️
+79°F
30 September
☁️
+76°F
In September 2024 Wilmington had 22 sunny days, 6 cloudy days, and 2 rainy days. The average maximum temperature was +82°F, with an absolute maximum of +93°F and a minimum of +66°F. The average humidity was 80%, with a maximum of 98% and a minimum of 41%. The average wind speed was 2 m/s, with a maximum of 10 m/s and a minimum of 0 m/s.
Are you planning a trip in September?
Climate Change Over the Years
This is how Wilmington climate has changed over the last 43 years.
The climate in Wilmington in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1996 (+69°F) and the highest in 2019 (+75°F). The driest year was 2007 with only 840 mm of rainfall, and the wettest year was 2020 with 2153 mm.
FAQ
Frequently asked questions about the weather in Wilmington in September:
Is September a good time to visit Wilmington?
It’s always a good time to visit Wilmington, but the weather is changeable in September, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in Wilmington in September?
September is warm in Wilmington. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.
Is Wilmington rainy in September?
Wilmington is often rainy in September. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Wilmington in September?
Usually, it’s not very sunny in Wilmington in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
For this page, we’ve looked at the typical weather in Wilmington, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
