nomadseason

September Weather in Wilmington, Australia

Last updated: August 22, 2025

In September, the average temperature in Wilmington, Australia hovers around 15°C (59°F). Expect minimums to dip to 2°C (36°F) and maximums to reach an impressive 34°C (93°F). With an average precipitation of 15 mm (0.6 in) spread over 3 days, the humidity sits comfortably at 57%, making for a varied yet pleasant climate.

September Temperature in Wilmington

In September in Wilmington, the average temperature is 15°C (59°F). The maximum can reach 34°C (93°F) and the minimum can be as low as 2°C (36°F). This variation in temperature makes Wilmington an ideal destination for travelers seeking both warm and cool experiences.

September Weather in Wilmington: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Wilmington, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wilmington, September typically has an average temperature of 15°C (59°F), with highs reaching up to 34°C (93°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec757371655651515259646872
Data source: Temperature data for Wilmington generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Wilmington

In Wilmington in September, the precipitation amount is 15 mm (0.6 in) over the course of 3 days.

September Precipitation Trends in Wilmington

The chart displays monthly precipitation patterns in Wilmington, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Wilmington, September typically receives around 15 mm (0.6 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec13198212221192815293821
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Wilmington

In Wilmington in September, humidity is 57%. With an average temperature of 15°C (59°F), this humidity feels like a refreshing embrace, making it comfortable for traveling while adding a light dampness that keeps the air feeling vibrant and alive.

September Average Humidity in Wilmington

This chart illustrates the average monthly humidity levels in Wilmington, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Wilmington is approximately 57%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec30%35%50%60%69%71%72%64%57%40%40%37%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Wilmington

In Wilmington in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Wilmington.

Maximum UV Index Levels in Wilmington for September

The chart shows the monthly maximum UV Index (UVI) for Wilmington in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Wilmington typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151412964468111315
Data source: Wilmington September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Wilmington Compares to Other Months

Weather in Wilmington varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Wilmington, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Wilmington, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)13 mm (0.5 inches)30%extreme
February Weather23°C (73°F)19 mm (0.7 inches)35%extreme
March Weather22°C (71°F)7 mm (0.3 inches)50%extreme
April Weather18°C (65°F)21 mm (0.8 inches)60%very high
May Weather13°C (56°F)22 mm (0.9 inches)69%high
June Weather11°C (51°F)21 mm (0.8 inches)71%moderate
July Weather11°C (51°F)19 mm (0.7 inches)72%moderate
August Weather11°C (52°F)28 mm (1.1 inches)64%high
September Weather15°C (59°F)15 mm (0.6 inches)57%very high
October Weather18°C (64°F)29 mm (1.2 inches)40%extreme
November Weather20°C (68°F)38 mm (1.5 inches)40%extreme
December Weather22°C (73°F)21 mm (0.8 inches)37%extreme

Compare Wilmington's Climate with Cities Worldwide