Click on a day for an hourly weather forecast
The temperatures in Newcastle in September are quite cold with temperatures between 9°C and 17°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Newcastle 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 Newcastle in September 2025.
If you’re planning to visit Newcastle in the near future, we highly recommend that you review the 14 day weather forecast for Newcastle before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 6° / 1° | 6 | 19 | 5 | 47 mm | Awful | Newcastle in January |
| February | 7° / 1° | 7 | 17 | 5 | 43 mm | Bad | Newcastle in February |
| March | 10° / 2° | 5 | 24 | 2 | 40 mm | Bad | Newcastle in March |
| April | 12° / 3° | 4 | 25 | 1 | 38 mm | Ok | Newcastle in April |
| May | 15° / 6° | 5 | 26 | 0 | 53 mm | Good | Newcastle in May |
| June | 18° / 9° | 5 | 25 | 0 | 62 mm | Good | Newcastle in June |
| July | 19° / 11° | 4 | 27 | 0 | 59 mm | Good | Newcastle in July |
| August | 19° / 11° | 5 | 26 | 0 | 57 mm | Good | Newcastle in August |
| September | 17° / 9° | 3 | 27 | 0 | 36 mm | Good | Newcastle in September |
| October | 13° / 7° | 5 | 26 | 0 | 48 mm | Ok | Newcastle in October |
| November | 9° / 4° | 7 | 23 | 1 | 58 mm | Bad | Newcastle in November |
| December | 7° / 2° | 6 | 22 | 2 | 53 mm | Bad | Newcastle in December |