Click on a day for an hourly weather forecast
The temperatures in Newport in September are comfortable with low of 16°C and and high up to 22°C.
You can expect about 3 to 8 days of rain in Newport 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 Newport in September 2025.
If you’re planning to visit Newport in the near future, we highly recommend that you review the 14 day weather forecast for Newport before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 2° / -3° | 6 | 18 | 8 | 119 mm | Awful | Newport in January |
| February | 3° / -3° | 7 | 15 | 7 | 131 mm | Awful | Newport in February |
| March | 7° / 1° | 7 | 19 | 5 | 136 mm | Awful | Newport in March |
| April | 12° / 6° | 7 | 22 | 1 | 136 mm | Bad | Newport in April |
| May | 17° / 11° | 7 | 24 | 0 | 116 mm | Ok | Newport in May |
| June | 22° / 15° | 6 | 24 | 0 | 126 mm | Good | Newport in June |
| July | 26° / 19° | 7 | 24 | 0 | 145 mm | Good | Newport in July |
| August | 26° / 19° | 5 | 26 | 0 | 128 mm | Perfect | Newport in August |
| September | 22° / 16° | 4 | 26 | 0 | 93 mm | Good | Newport in September |
| October | 17° / 11° | 6 | 25 | 0 | 155 mm | Good | Newport in October |
| November | 11° / 5° | 5 | 24 | 1 | 108 mm | Ok | Newport in November |
| December | 6° / 1° | 7 | 19 | 5 | 150 mm | Awful | Newport in December |