Karratha Weather in September
What's the weather like in Karratha (Western Australia) in September 2025?
The climate in Karratha during September can be summarized as hot and very dry.
September is in the spring in Karratha and is typically the 5th coldest month of the year. Daytime maximum temperatures average around 32°C (90°F), whilst at night 17°C (62°F) is normal.
| Daytime temperature | 32.2°C 89.9°F |
|---|---|
| Nightly temperature | 16.7°C 62°F |
| Average temperature | 24.4°C 75.9°F |
| Daily sunshine | 11.8 hrs |
| Avg rainfall | 1 mm 0.1 ins |
| Rainy days | 1 days |
| Sea temperature | 23.9°C 75°F |
| Humidity | 35% |
| Windspeed | 17.3kph 11 mph |
On average September is the 3rd driest month of the year in Karratha with around 1mm 0.1 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 11.8 hours of sunshine per day.
September temperatures in Karratha
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Karratha in September 2025.
Other monthly averages
Best places to visit in September
Karratha weather stats
| Hottest month: | January | 37.6°C 99.7°F |
|---|---|---|
| Driest month: | October | 1mm 0ins |
| Sunniest month: | October | 12.7hrs |
| Coldest month: | July | 26.5°C 79.7°F |
| Wettest month: | February | 61mm 2.4ins |
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