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The weather in New Haven in July is hot. The average temperatures are between 20°C and 28°C.
You can expect rain for roughly half of the month of July in New Haven. 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 New Haven in July 2025.
If you’re planning to visit New Haven in the near future, we highly recommend that you review the 14 day weather forecast for New Haven before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 2° / -4° | 7 | 15 | 9 | 130 mm | Awful | New Haven in January |
| February | 3° / -3° | 7 | 12 | 10 | 145 mm | Awful | New Haven in February |
| March | 7° / 0° | 8 | 17 | 6 | 153 mm | Awful | New Haven in March |
| April | 13° / 6° | 8 | 21 | 1 | 145 mm | Bad | New Haven in April |
| May | 19° / 11° | 8 | 23 | 0 | 143 mm | Ok | New Haven in May |
| June | 24° / 16° | 8 | 22 | 0 | 154 mm | Good | New Haven in June |
| July | 28° / 20° | 8 | 23 | 0 | 179 mm | Good | New Haven in July |
| August | 27° / 20° | 7 | 24 | 0 | 170 mm | Good | New Haven in August |
| September | 24° / 16° | 6 | 24 | 0 | 122 mm | Perfect | New Haven in September |
| October | 17° / 11° | 7 | 24 | 0 | 175 mm | Ok | New Haven in October |
| November | 11° / 5° | 7 | 22 | 1 | 121 mm | Bad | New Haven in November |
| December | 5° / 0° | 8 | 17 | 6 | 169 mm | Awful | New Haven in December |