New South Wales weather in September
September is one of the best months to visit New South Wales: highs of 20°C (67°F) and about 43 mm (1.7 in) of rain on average. Nights average 14°C (56°F) and cloud cover 47% (NASA POWER, 2001–2025 averages). The sea averages 19°C (66°F). It is the driest month of the year and the 4th coolest. Compared with August, it is warmer and about as wet; October brings highs of 22°C (71°F) and 64 mm (2.5 in) of rain.
Figures are long-term averages for Sydney, the largest city in New South Wales. See below for other places.
Is September a good time to visit New South Wales?
best month Weather score 82/100.
Yes. September is one of the best months for weather in New South Wales.
Does it rain a lot in New South Wales in September?
No, it is usually dry: about 43 mm (1.7 in) falls in an average September. It is the driest month of the year.
How warm is New South Wales in September?
Days average 20°C (67°F) and nights 14°C (56°F).
New South Wales weather by month
| Month | High | Low | Rain | Cloud | Sea | Weather |
|---|---|---|---|---|---|---|
| January | 26°C (78°F) | 20°C (69°F) | 83 mm | 59% | 22°C (72°F) | fair |
| February | 25°C (77°F) | 21°C (69°F) | 134 mm | 61% | 23°C (74°F) | least pleasant |
| March | 24°C (75°F) | 20°C (67°F) | 104 mm | 59% | 23°C (73°F) | fair |
| April | 22°C (72°F) | 18°C (64°F) | 73 mm | 54% | 22°C (72°F) | best |
| May | 20°C (67°F) | 15°C (59°F) | 54 mm | 52% | 21°C (70°F) | best |
| June | 17°C (63°F) | 13°C (55°F) | 87 mm | 58% | 20°C (67°F) | least pleasant |
| July | 17°C (62°F) | 12°C (53°F) | 44 mm | 49% | 18°C (64°F) | fair |
| August | 17°C (63°F) | 12°C (53°F) | 47 mm | 46% | 18°C (64°F) | fair |
| September | 20°C (67°F) | 14°C (56°F) | 43 mm | 47% | 19°C (66°F) | best |
| October | 22°C (71°F) | 15°C (60°F) | 64 mm | 55% | 19°C (67°F) | best |
| November | 23°C (73°F) | 17°C (63°F) | 83 mm | 61% | 20°C (68°F) | fair |
| December | 24°C (76°F) | 19°C (65°F) | 72 mm | 60% | 21°C (70°F) | fair |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine. Page updated . How we rate months
Weather across New South Wales in September
Weather can differ a lot within New South Wales: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Sydney | 20°C (67°F) | 14°C (56°F) | 43 mm | best |
| Newcastle | 20°C (68°F) | 14°C (58°F) | 52 mm | best |
| Central Coast | 21°C (69°F) | 11°C (52°F) | 44 mm | best |
| Wollongong | 18°C (65°F) | 8°C (47°F) | 45 mm | best |
| Maitland | 22°C (71°F) | 8°C (47°F) | 41 mm | best |
| Coffs Harbour | 21°C (70°F) | 15°C (59°F) | 44 mm | best |
| Blue Mountains | 20°C (68°F) | 8°C (46°F) | 47 mm | best |
| Pittwater | 21°C (69°F) | 11°C (52°F) | 44 mm | best |
| Port Macquarie | 21°C (69°F) | 16°C (62°F) | 44 mm | best |
| Blacktown | 20°C (68°F) | 7°C (44°F) | 49 mm | best |
| Tamworth | 22°C (72°F) | 8°C (46°F) | 39 mm | best |
| Dubbo | 22°C (71°F) | 7°C (45°F) | 34 mm | best |