September weather forecast and climate
Wilmington, NC

What is the temperature in September in Wilmington?

In September, in Wilmington, the average high-temperature is 83.7°F (28.7°C), and the average low-temperature is 65.7°F (18.7°C).

How many days does it rain in September in Wilmington?

In Wilmington, in September, it is raining for 12.8 days, with typically 7.8" (199.1mm) of accumulated precipitation.

What is the rainiest month in Wilmington?

The month with the most rainfall in Wilmington, North Carolina, is September when the rain falls for 12.8 days and typically aggregates up to 7.8" (199.1mm) of precipitation.

How warm is the water in September in Wilmington?

In September, in Wilmington, the average sea temperature is 80.4°F (26.9°C). For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.
Average temperature in September - Wilmington, NC
  • Average high temperature in September: 83.7°F

The warmest month (with the highest average high temperature) is July (89.7°F).
The month with the lowest average high temperature is January (56.4°F).

  • Average low temperature in September: 65.6°F

The month with the highest average low temperature is July (72.6°F).
The coldest month (with the lowest average low temperature) is January (35.6°F).

Average humidity in September - Wilmington, NC
  • Average humidity in September: 79.9%

The month with the highest relative humidity is August (80.7%).
The month with the lowest relative humidity is April (66.8%).

Average rainfall in September - Wilmington, NC
  • Average rainfall in September: 7.8"

The wettest month (with the highest rainfall) is September (7.8").
The driest month (with the lowest rainfall) is April (2.8").

Average rainfall days in September - Wilmington, NC
  • Average rainfall days in September: 12.8 days

The month with the highest number of rainy days is July (16.4 days).
The month with the lowest number of rainy days is April (8.5 days).

Average snowfall in September - Wilmington, NC
  • Average snowfall in September: 0"

The month with the highest snowfall is December (0.8").
Months with the lowest snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in September - Wilmington, NC
  • Average snowfall days in September: 0 days

Months with the highest number of snowfall days are January, February and December (0.3 days).
Months with the lowest number of snowfall days are April, May, June, July, August, September, October and November (0 days).

Average sea temperature in September - Wilmington, NC
  • Average sea temperature in September: 80.4°F

The best month for swimming (with the highest average sea temperature) is August (82.8°F).
The coldest month (with the lowest average sea temperature) is February (57.5°F).

Average daylight in September / Average sunshine in September - Wilmington, NC
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 7.7h

The month with most sunshine is June (Average sunshine: 9.3h).
The month with least sunshine is December (Average sunshine: 5.8h).

Average UV index in September - Wilmington, NC
  • Average UV index in September: 8

Months with the highest UV index are June and July (UV index 10).
Months with the lowest UV index are January and December (UV index 3).

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