Click on a day for an hourly weather forecast
The temperatures in Hunterdon in September are quite cold with temperatures between 5°C and 14°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Hunterdon 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 Hunterdon in September 2025.
If you’re planning to visit Hunterdon in the near future, we highly recommend that you review the 14 day weather forecast for Hunterdon before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 22° / 12° | 4 | 27 | 0 | 54 mm | Good | Hunterdon in January |
| February | 21° / 12° | 3 | 25 | 0 | 53 mm | Good | Hunterdon in February |
| March | 19° / 10° | 4 | 27 | 0 | 44 mm | Good | Hunterdon in March |
| April | 17° / 8° | 4 | 26 | 0 | 61 mm | Good | Hunterdon in April |
| May | 14° / 7° | 3 | 28 | 0 | 59 mm | Good | Hunterdon in May |
| June | 11° / 5° | 5 | 25 | 0 | 71 mm | Ok | Hunterdon in June |
| July | 11° / 4° | 5 | 26 | 0 | 59 mm | Ok | Hunterdon in July |
| August | 12° / 4° | 5 | 26 | 1 | 64 mm | Ok | Hunterdon in August |
| September | 14° / 5° | 4 | 26 | 0 | 40 mm | Good | Hunterdon in September |
| October | 16° / 6° | 5 | 26 | 0 | 72 mm | Good | Hunterdon in October |
| November | 18° / 8° | 4 | 26 | 0 | 53 mm | Good | Hunterdon in November |
| December | 20° / 10° | 4 | 27 | 0 | 59 mm | Good | Hunterdon in December |