Click on a day for an hourly weather forecast
The temperatures in Carlow in September are quite cold with temperatures between 8°C and 16°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Carlow during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Carlow in September 2025.
If you’re planning to visit Carlow in the near future, we highly recommend that you review the 14 day weather forecast for Carlow before you arrive.
Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
---|---|---|---|---|---|---|---|
January | 7° / 1° | 7 | 21 | 3 | 68 mm | Awful | Carlow in January |
February | 8° / 1° | 7 | 18 | 3 | 61 mm | Awful | Carlow in February |
March | 10° / 2° | 6 | 23 | 3 | 52 mm | Bad | Carlow in March |
April | 12° / 3° | 5 | 24 | 0 | 51 mm | Ok | Carlow in April |
May | 14° / 6° | 5 | 26 | 0 | 61 mm | Good | Carlow in May |
June | 17° / 8° | 6 | 24 | 0 | 74 mm | Good | Carlow in June |
July | 18° / 10° | 6 | 25 | 0 | 70 mm | Good | Carlow in July |
August | 18° / 10° | 6 | 25 | 0 | 73 mm | Good | Carlow in August |
September | 16° / 8° | 5 | 25 | 0 | 56 mm | Good | Carlow in September |
October | 13° / 6° | 6 | 25 | 0 | 72 mm | Ok | Carlow in October |
November | 9° / 3° | 7 | 22 | 0 | 83 mm | Bad | Carlow in November |
December | 7° / 2° | 7 | 22 | 2 | 71 mm | Awful | Carlow in December |