September weather forecast
Darwin, Australia

September marks a significant increase in rainfall from 2mm (0.08") to 14mm (0.55"). Slight changes in the weather can be noticed with an increase in relative humidity from 59% to 64%. Despite the increased rainfall, the weather remains quite manageable, leaving plenty of hours for outdoor activities. As the seasons begin to transition, Darwin's flora comes to life, making it a visually stunning time for nature lovers and photographers. The gradual increase in precipitation won't hinder the attractive natural beauty of this city, making September a rewarding month to visit.

Temperature

The unfolding of September in Darwin shows an average high-temperature of a still tropical 31.7°C (89.1°F), indicating a slight variance from August's 30.2°C (86.4°F). An average low-temperature of 24°C (75.2°F) marks the nights in Darwin throughout September.

Heat index

During September, the heat index is appraised at a torrid 38°C (100.4°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
In terms of the heat index, values are set with light wind and shade conditions in mind. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', ties air temperature with relative humidity to produce the perceived temperature sensation. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

In Darwin, the average relative humidity in September is 64%.

Rainfall

In Darwin, Australia, in September, it is raining for 7.4 days, with typically 14mm (0.55") of accumulated precipitation. In Darwin, during the entire year, the rain falls for 191.8 days and collects up to 1282mm (50.47") of precipitation.

Sea temperature

In Darwin, the average seawater temperature in September is 27.8°C (82°F).
Note: For water activities like swimming, diving, and more, temperatures ranging between 25°C (77°F) and 29°C (84.2°F) offer superior comfort and enjoyment for lengthy durations.

Daylight

The average length of the day in September in Darwin, Australia, is 12h and 2min.
On the first day of September in Darwin, sunrise is at 6:50 am and sunset at 6:42 pm. On the last day of the month, sunrise is at 6:30 am and sunset at 6:42 pm ACST.

Sunshine

In September, the average sunshine is 9.8h.

UV index

The months with the lowest UV index in Darwin are January through October and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.
Note: In September, the average maximum UV index of 7 translates into the following recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Stay vigilant! UV rays get a boost in intensity due to sand and water reflections.