New Haven weather in July
Temperature, sea and sunshine in July: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in July
Excellent
Best time to visit: July – August
What is the weather like in New Haven in July?
In July, New Haven is hot: daytime highs average 27 °C, and even at night it stays warm at around 20 °C. The sea averages 22.1 °C – refreshing for a swim. The sun shines for around 8 hours a day. Rain is frequent, with about 10 rainy days and 88 mm in total. The air is often humid and muggy. All in all, July is an excellent month for a holiday in New Haven.
July compared
How the weather changes from June to August. Tap a month to open it.
More details for July
- Daylight
- 14 h 54 min05:31 – 20:24
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 18 daysdew point 18 °C or moreAll months
- Wind
- 19 km/haverage daily peakAll months
- Cloud cover
- 53 %on averageAll months
- Hot days
- 5 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4America/New_York
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %73 %
- Sunshineweight 20 %88 %
- Few rainy daysweight 20 %61 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in July
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
New Haven in July: quick answers
Is New Haven hot in July?
Yes. In July, New Haven is hot: daytime highs average 27 °C and nights stay around 20 °C. On about 5 days the thermometer climbs to 30 °C or more.
Can you swim in New Haven in July?
Yes. In July the sea averages 22.1 °C – refreshing for a swim.
Does it rain much in New Haven in July?
Rain is frequent, with about 10 rainy days and 88 mm in total.
New Haven month by month
The whole year in New HavenAll destinations: USAWhere to go in JulySea temperature in July
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences