Nepean
September
Weather in Nepean for September 2025
Your guide to Nepean weather in September - trends and predictions
In general, the average temperature in Nepean at the beginning of September is 25.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.4 °C by the end of September.
With an average of 5 rainy days, Nepean experiences minimal rainfall in September, ensuring that most days remain pleasantly dry.
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25
Dry days
5
Rainy days
0
Snow days
23°/10°
Temperatures
13 km/h
Avg max wind
73 %
Avg humidity
Nepean in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  24° | 2 22° | 3  25° | 4 27° | 5 28° | 6  28° | 7  22° |
| 8  15° | 9  21° | 10 21° | 11 24° | 12 24° | 13 21° | 14 21° |
| 15  24° | 16 25° | 17 24° | 18 23° | 19 23° | 20 22° | 21 20° |
| 22 22° | 23 20° | 24 22° | 25  18° | 26 20° | 27 20° | 28 20° |
| 29 21° | 30 22° |
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Temperatures trend during September in Nepean
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Overcast | 24° /10° | 2 mm | 6 | |
| 2 Sept. | Overcast | 22° /10° | 0 mm | 5 | |
| 3 Sept. | Mist | 25° /10° | 0 mm | 6 | |
| 4 Sept. | Mist | 27° /14° | 0 mm | 7 | |
| 5 Sept. | Mist | 28° /15° | 0 mm | 7 | |
| 6 Sept. | Thundery outbreaks possible | 28° /15° | 0.2 mm | 6 | |
| 7 Sept. | Light rain shower | 22° /12° | 8.5 mm | 5 | |
| 8 Sept. | Light rain | 15° /10° | 1.7 mm | 4 | |
| 9 Sept. | Cloudy | 21° /6° | 0 mm | 5 | |
| 10 Sept. | Overcast | 21° /9° | 0 mm | 5 | |
| 11 Sept. | Overcast | 24° /9° | 0 mm | 5 | |
| 12 Sept. | Fog | 24° /13° | 0.1 mm | 6 | |
| 13 Sept. | Overcast | 21° /11° | 0.1 mm | 6 | |
| 14 Sept. | Mist | 21° /10° | 0 mm | 5 | |
| 15 Sept. | Partly cloudy | 24° /10° | 0 mm | 6 | |
| 16 Sept. | Cloudy | 25° /12° | 0 mm | 6 | |
| 17 Sept. | Cloudy | 24° /13° | 0.6 mm | 6 | |
| 18 Sept. | Fog | 23° /11° | 0.9 mm | 5 | |
| 19 Sept. | Thundery outbreaks possible | 23° /12° | 0 mm | 6 | |
| 20 Sept. | Overcast | 22° /10° | 0 mm | 5 | |
| 21 Sept. | Mist | 20° /8° | 0 mm | 5 | |
| 22 Sept. | Overcast | 22° /8° | 0 mm | 5 | |
| 23 Sept. | Mist | 20° /10° | 4.3 mm | 5 | |
| 24 Sept. | Mist | 22° /11° | 0 mm | 5 | |
| 25 Sept. | Sunny | 18° /10° | 48 mm | 5 | |
| 26 Sept. | Sunny | 20° /10° | 2.4 mm | 6 | |
| 27 Sept. | Mist | 20° /8° | 0 mm | 5 | |
| 28 Sept. | Partly cloudy | 20° /9° | 0 mm | 5 | |
| 29 Sept. | Mist | 21° /9° | 0 mm | 5 | |
| 30 Sept. | Partly cloudy | 22° /12° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Nepean in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Nepean forecast closer to your planned date for the most up-to-date weather information.
Nepean in September - FAQ
What are the expected maximum and minimum temperatures in Nepean during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Nepean during September?
Expect minimal rainfall in Nepean during September, with a total of 13 mm over approximately 5 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Nepean during September?
The average wind speed in Nepean during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Nepean
Explore the daily rainfall trends and prepare for Nepeans September weather 💧
UV exposure in Nepean during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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