Weather in Cork in September 2025
Average weather
Average temperature in Cork in September
Going from a maximum of +73°F during the day to a minimum of +43°F during the night, the temperature in September averages around +63°F.
The average maximum temperature goes down 6% by the end of the month, compared with the beginning of the month, from +64°F to +63°F.
Is Cork warm or cold in September?
Cork is typically mild in September.
Maximum temperatures go down compared to the previous month from +64°F to +61°F. The minimum temperature also goes down from +54°F to +52°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
September is one of the warmest months in Cork, here is the comparison with other months:
Climate in Cork in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +64°F | +61°F | +55°F | ||||
| Min. temperature | ||||||
| +41°F | +37°F | +30°F | ||||
| Max. temperature | ||||||
| +81°F | +75°F | +66°F | ||||
| Rainfall | ||||||
| 73 mm | 70 mm | 95 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Humidity | ||||||
| 84% | 86% | 87% | ||||
| Air pressure | ||||||
| 1014 HPa | 1014 HPa | 1010 HPa | ||||
| Sunny days | ||||||
| 0 | 1 | 1 | ||||
| Cloudy days | ||||||
| 11 | 12 | 11 | ||||
| Rainy days | ||||||
| 20 | 17 | 19 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as ok as in August. It’s getting colder in September. From +64°F in the day, the average maximum temperature lowers to +61°F. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 73 mm to 70 mm. Humidity rises from 84% to 86%. The average wind speed doesn’t change much during September, staying around 3 m/s. The good news is there are likely to be more sunny days in September, from 0 to 1.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 3 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Cork is gradually increasing during September, going from 1 m/s to 4 m/s over the course of the month.
Rain
How was the weather last September in Cork?
Climate Change Over the Years
The climate in Cork in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1986 (+52°F) and the highest in 2022 (+56°F). The driest year was 2010 with only 711 mm of rainfall, and the wettest year was 2009 with 1168 mm.
FAQ
Is September a good time to visit Cork?
Can you sunbathe in Cork in September?
Is Cork rainy in September?
Is it sunny in Cork in September?
Other cities in Ireland
Monthly weather in Cork
Source of the data
For this page, we’ve looked at the typical weather in Cork, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.