Westport Weather in September
What's the weather like in Westport (West Coast) in September 2025?
The climate in Westport during September can be summarized as mild and very wet.
September is in the spring in Westport and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a cool 14°C (57°F), whilst at night 7°C (44°F) is normal.
| Daytime temperature | 14°C 57.2°F |
|---|---|
| Nightly temperature | 6.6°C 43.9°F |
| Average temperature | 10.3°C 50.5°F |
| Daily sunshine | 4.8 hrs |
| Avg rainfall | 203 mm 8 ins |
| Rainy days | 20 days |
| Sea temperature | 13°C 55.5°F |
| Humidity | 83% |
| Windspeed | 11.9kph 7 mph |
On average September is the 2nd wettest month of the year in Westport with around 203mm 8 inches of rain making it a very wet time to visit. This rainfall is typically spread over 20 days, although this may vary considerably.
On the flip side this corresponds to an average of 4.8 hours of sunshine per day.
September temperatures in Westport
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 Westport in September 2025.
Other monthly averages
Best places to visit in September
Westport weather stats
| Hottest month: | February | 20.2°C 68.4°F |
|---|---|---|
| Driest month: | February | 137mm 5.4ins |
| Sunniest month: | February | 7hrs |
| Coldest month: | July | 11.9°C 53.4°F |
| Wettest month: | May | 210mm 8.3ins |
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