Climate averages 1991–2020
New Haven weather
in July.
A warm, moderately wet month: the warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a warm month in New Haven: daytime highs average 27.0°C and nights cool to about 19.9°C. By daytime temperature it is the warmest month of the year.
Expect about 82 mm of rain on roughly 10 days, which makes July a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 50 min on an average July day.
The nearest other city in this atlas is Bridgeport (26 km away). In July its highs average 27.6°C, 0.6°C warmer than New Haven, with 87 mm of rain.
Among the 498 cities listed in the United States, New Haven ranks joint 428th of 498 for the warmest July highs and joint 261st of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; New Haven is 3.3°C cooler than that mean.
From July to August, average highs fall by 0.8°C to 26.3°C, and monthly rainfall rises from 82 mm to 102 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
New Haven climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 2.7°C-3.6°C | -3.6°C | 108 | 10.1 | 9.610 h |
| February | 3.6°C-3.3°C | -3.3°C | 97 | 9.2 | 10.611 h |
| March | 7.3°C0.0°C | 0.0°C | 128 | 10.9 | 11.912 h |
| April | 13.1°C5.2°C | 5.2°C | 116 | 11.5 | 13.313 h |
| May | 18.4°C10.6°C | 10.6°C | 98 | 11.6 | 14.514 h |
| June | 23.6°C16.2°C | 16.2°C | 98 | 10.5 | 15.115 h |
| July, selected | 27.0°C19.9°C | 19.9°C | 82 | 9.5 | 14.815 h |
| August | 26.3°C19.6°C | 19.6°C | 102 | 9.6 | 13.814 h |
| September | 22.6°C16.2°C | 16.2°C | 109 | 8.9 | 12.513 h |
| October | 16.5°C10.5°C | 10.5°C | 129 | 10.1 | 11.111 h |
| November | 10.7°C4.9°C | 4.9°C | 110 | 9.5 | 9.910 h |
| December | 5.6°C0.0°C | 0.0°C | 137 | 11.2 | 9.39 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Bridgeport in JulyUnited States · 26 kmHigh 27.6°C · Low 20.1°C · 87 mm rain
- Waterbury in JulyUnited States · 30 kmHigh 28.2°C · Low 18.9°C · 90 mm rain
- New Britain in JulyUnited States · 41 kmHigh 28.5°C · Low 18.5°C · 89 mm rain
- Danbury in JulyUnited States · 45 kmHigh 28.1°C · Low 18.9°C · 108 mm rain
- Norwalk in JulyUnited States · 45 kmHigh 28.1°C · Low 20.5°C · 92 mm rain
- Hartford in JulyUnited States · 55 kmHigh 28.6°C · Low 18.4°C · 89 mm rain
- Stamford in JulyUnited States · 58 kmHigh 28.3°C · Low 20.5°C · 92 mm rain
- Greenburgh in JulyUnited States · 82 kmHigh 28.4°C · Low 20.2°C · 97 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for New Haven) is explained once on the New Haven year overview and on the Sources, method and limits page.