Irvine Weather in September
What's the weather like in Irvine (Scotland) in September 2025?
The climate in Irvine during September can be summarized as mild and wet.
September is in the fall / autumn in Irvine and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a cool 16°C (60°F), whilst at night 9°C (48°F) is normal.
| Daytime temperature | 15.5°C 59.9°F |
|---|---|
| Nightly temperature | 9.1°C 48.4°F |
| Average temperature | 12.3°C 54.1°F |
| Daily sunshine | 4.1 hrs |
| Avg rainfall | 125 mm 4.9 ins |
| Rainy days | 19 days |
| Sea temperature | 14.5°C 58.1°F |
| Humidity | 86% |
| Windspeed | 16.9kph 11 mph |
On average September is the wettest month of the year in Irvine with around 125mm 4.9 inches of rain making it a wet time to visit. This rainfall is typically spread over 19 days, although this may vary considerably.
On the flip side this corresponds to an average of 4.1 hours of sunshine per day.
September temperatures in Irvine
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 Irvine in September 2025.
Other monthly averages
Best places to visit in September
Irvine weather stats
| Hottest month: | July | 17.9°C 64.2°F |
|---|---|---|
| Driest month: | April | 54mm 2.1ins |
| Sunniest month: | May | 6.8hrs |
| Coldest month: | January | 6.1°C 43°F |
| Wettest month: | September | 125mm 4.9ins |
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