Click on a day for an hourly weather forecast
The temperatures in Lowell in September are comfortable with low of 14°C and and high up to 24°C.
You can expect about 3 to 8 days of rain in Lowell 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 Lowell in September 2025.
If you’re planning to visit Lowell in the near future, we highly recommend that you review the 14 day weather forecast for Lowell before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 0° / -6° | 6 | 14 | 11 | 110 mm | Awful | Lowell in January |
| February | 1° / -6° | 6 | 12 | 11 | 124 mm | Awful | Lowell in February |
| March | 6° / -2° | 8 | 14 | 9 | 137 mm | Awful | Lowell in March |
| April | 13° / 4° | 8 | 21 | 2 | 124 mm | Awful | Lowell in April |
| May | 20° / 10° | 7 | 24 | 0 | 103 mm | Ok | Lowell in May |
| June | 25° / 14° | 7 | 23 | 0 | 125 mm | Good | Lowell in June |
| July | 29° / 18° | 7 | 24 | 0 | 120 mm | Ok | Lowell in July |
| August | 28° / 17° | 6 | 25 | 0 | 113 mm | Perfect | Lowell in August |
| September | 24° / 14° | 4 | 26 | 0 | 83 mm | Perfect | Lowell in September |
| October | 17° / 8° | 6 | 25 | 0 | 126 mm | Good | Lowell in October |
| November | 10° / 2° | 7 | 21 | 2 | 108 mm | Awful | Lowell in November |
| December | 4° / -2° | 7 | 16 | 7 | 139 mm | Awful | Lowell in December |