Click on a day for an hourly weather forecast
The weather in Princeton in July is hot. The average temperatures are between 21°C and 29°C.
You can expect rain for roughly half of the month of July in Princeton. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Princeton in July 2025.
If you’re planning to visit Princeton in the near future, we highly recommend that you review the 14 day weather forecast for Princeton before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -3° | 6 | 18 | 7 | 89 mm | Awful | Princeton in January |
| February | 5° / -2° | 7 | 14 | 7 | 117 mm | Awful | Princeton in February |
| March | 9° / 2° | 7 | 18 | 5 | 127 mm | Awful | Princeton in March |
| April | 15° / 7° | 6 | 24 | 1 | 105 mm | Good | Princeton in April |
| May | 21° / 12° | 7 | 24 | 0 | 130 mm | Ok | Princeton in May |
| June | 26° / 17° | 7 | 23 | 0 | 131 mm | Good | Princeton in June |
| July | 29° / 21° | 9 | 22 | 0 | 180 mm | Ok | Princeton in July |
| August | 28° / 20° | 7 | 24 | 0 | 174 mm | Good | Princeton in August |
| September | 25° / 17° | 5 | 25 | 0 | 111 mm | Perfect | Princeton in September |
| October | 18° / 11° | 5 | 25 | 0 | 134 mm | Good | Princeton in October |
| November | 11° / 5° | 5 | 24 | 1 | 91 mm | Ok | Princeton in November |
| December | 7° / 1° | 7 | 20 | 5 | 142 mm | Awful | Princeton in December |