Click on a day for an hourly weather forecast
The temperatures in Morristown in September are comfortable with low of 16°C and and high up to 27°C.
You can expect about 3 to 8 days of rain in Morristown 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 Morristown in September 2025.
If you’re planning to visit Morristown in the near future, we highly recommend that you review the 14 day weather forecast for Morristown before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 7° / -2° | 9 | 20 | 2 | 109 mm | Awful | Morristown in January |
| February | 10° / 0° | 9 | 17 | 2 | 124 mm | Awful | Morristown in February |
| March | 14° / 4° | 9 | 21 | 1 | 117 mm | Ok | Morristown in March |
| April | 20° / 8° | 8 | 22 | 0 | 106 mm | Ok | Morristown in April |
| May | 24° / 13° | 10 | 21 | 0 | 114 mm | Good | Morristown in May |
| June | 29° / 17° | 10 | 20 | 0 | 104 mm | Ok | Morristown in June |
| July | 30° / 19° | 13 | 18 | 0 | 115 mm | Ok | Morristown in July |
| August | 30° / 18° | 10 | 22 | 0 | 89 mm | Ok | Morristown in August |
| September | 27° / 16° | 7 | 23 | 0 | 94 mm | Good | Morristown in September |
| October | 20° / 9° | 6 | 25 | 0 | 97 mm | Good | Morristown in October |
| November | 14° / 3° | 6 | 24 | 0 | 98 mm | Good | Morristown in November |
| December | 10° / 1° | 9 | 22 | 1 | 128 mm | Bad | Morristown in December |