Click on a day for an hourly weather forecast
The temperatures in Barnsley in September are usually low and can range between 10°C and 18°C.
You can expect about 3 to 8 days of rain in Barnsley 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 Barnsley in September 2025.
If you’re planning to visit Barnsley in the near future, we highly recommend that you review the 14 day weather forecast for Barnsley before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 6° / 2° | 9 | 17 | 6 | 66 mm | Awful | Barnsley in January |
| February | 7° / 2° | 8 | 15 | 5 | 57 mm | Awful | Barnsley in February |
| March | 10° / 3° | 7 | 22 | 3 | 54 mm | Awful | Barnsley in March |
| April | 13° / 4° | 5 | 24 | 1 | 50 mm | Ok | Barnsley in April |
| May | 15° / 7° | 6 | 26 | 0 | 69 mm | Good | Barnsley in May |
| June | 18° / 10° | 6 | 24 | 0 | 85 mm | Good | Barnsley in June |
| July | 20° / 12° | 6 | 25 | 0 | 83 mm | Good | Barnsley in July |
| August | 20° / 12° | 6 | 25 | 0 | 84 mm | Good | Barnsley in August |
| September | 18° / 10° | 5 | 25 | 0 | 54 mm | Good | Barnsley in September |
| October | 14° / 8° | 6 | 25 | 0 | 72 mm | Good | Barnsley in October |
| November | 9° / 5° | 8 | 21 | 1 | 77 mm | Bad | Barnsley in November |
| December | 7° / 3° | 8 | 20 | 3 | 69 mm | Awful | Barnsley in December |