Climate averages 1991–2020
Trenton weather
in July.
A hot, wet month: the warmest and one of the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Trenton: daytime highs average 29.6°C and nights cool to about 20.0°C. By daytime temperature it is the warmest month of the year.
Expect about 106 mm of rain on roughly 11 days, which makes July a wet month (one of the wettest months of the year). Daylight, from sunrise to sunset, lasts about 14 h 44 min on an average July day.
The nearest other city in this atlas is Cherry Hill (40 km away). In July its highs average 29.6°C, about as warm as Trenton, with 95 mm of rain.
Among the 498 cities listed in the United States, Trenton ranks joint 279th of 498 for the warmest July highs and joint 412th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Trenton is 0.7°C cooler than that mean.
From July to August, average highs fall by 1.1°C to 28.4°C, and monthly rainfall falls from 106 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
Trenton climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.2°C-3.8°C | -3.8°C | 83 | 9.3 | 9.710 h |
| February | 5.8°C-3.4°C | -3.4°C | 77 | 8.9 | 10.611 h |
| March | 10.2°C0.3°C | 0.3°C | 106 | 10.3 | 11.912 h |
| April | 16.6°C5.9°C | 5.9°C | 92 | 10.6 | 13.213 h |
| May | 21.8°C11.6°C | 11.6°C | 88 | 11.4 | 14.414 h |
| June | 26.8°C16.9°C | 16.9°C | 102 | 10.8 | 15.015 h |
| July, selected | 29.6°C20.0°C | 20.0°C | 106 | 11.3 | 14.715 h |
| August | 28.4°C19.3°C | 19.3°C | 102 | 10.4 | 13.814 h |
| September | 24.7°C15.7°C | 15.7°C | 101 | 9.2 | 12.512 h |
| October | 18.2°C9.5°C | 9.5°C | 92 | 8.4 | 11.211 h |
| November | 12.1°C3.7°C | 3.7°C | 75 | 7.8 | 10.010 h |
| December | 6.7°C-0.9°C | -0.9°C | 102 | 9.4 | 9.49 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
- Cherry Hill in JulyUnited States · 40 kmHigh 29.6°C · Low 20.7°C · 95 mm rain
- Edison in JulyUnited States · 44 kmHigh 29.4°C · Low 20.2°C · 108 mm rain
- Camden in JulyUnited States · 46 kmHigh 29.8°C · Low 20.6°C · 95 mm rain
- Philadelphia in JulyUnited States · 46 kmHigh 29.9°C · Low 20.7°C · 98 mm rain
- Brick in JulyUnited States · 54 kmHigh 28.3°C · Low 21.4°C · 101 mm rain
- Toms River in JulyUnited States · 55 kmHigh 29.1°C · Low 21.3°C · 101 mm rain
- Staten Island in JulyUnited States · 64 kmHigh 29.0°C · Low 20.5°C · 105 mm rain
- Bethlehem, United States in JulyUnited States · 70 kmHigh 29.0°C · Low 18.6°C · 91 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 Trenton) is explained once on the Trenton year overview and on the Sources, method and limits page.