Climate averages 1991–2020
Edison 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 Edison: daytime highs average 29.4°C and nights cool to about 20.2°C. By daytime temperature it is the warmest month of the year.
Expect about 108 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 46 min on an average July day.
The nearest other city in this atlas is Staten Island (24 km away). In July its highs average 29.0°C, about as warm as Edison, with 105 mm of rain.
Among the 498 cities listed in the United States, Edison ranks joint 289th of 498 for the warmest July highs and joint 421st of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Edison is 0.9°C cooler than that mean.
From July to August, average highs fall by 1.2°C to 28.2°C, and monthly rainfall falls from 108 mm to 103 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
Edison climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 3.7°C-4.1°C | -4.1°C | 83 | 9.2 | 9.610 h |
| February | 5.2°C-3.6°C | -3.6°C | 78 | 8.6 | 10.611 h |
| March | 9.7°C0.2°C | 0.2°C | 108 | 10.5 | 11.912 h |
| April | 16.0°C6.0°C | 6.0°C | 93 | 10.7 | 13.313 h |
| May | 21.4°C11.6°C | 11.6°C | 90 | 11.4 | 14.414 h |
| June | 26.4°C17.0°C | 17.0°C | 106 | 11.2 | 15.015 h |
| July, selected | 29.4°C20.2°C | 20.2°C | 108 | 11.2 | 14.815 h |
| August | 28.2°C19.5°C | 19.5°C | 103 | 10.2 | 13.814 h |
| September | 24.3°C15.9°C | 15.9°C | 101 | 9.1 | 12.513 h |
| October | 17.8°C9.7°C | 9.7°C | 95 | 8.6 | 11.211 h |
| November | 11.7°C3.9°C | 3.9°C | 76 | 7.8 | 10.010 h |
| December | 6.3°C-0.8°C | -0.8°C | 102 | 9.4 | 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
- Staten Island in JulyUnited States · 24 kmHigh 29.0°C · Low 20.5°C · 105 mm rain
- Newark in JulyUnited States · 31 kmHigh 29.2°C · Low 20.0°C · 106 mm rain
- New York City in JulyUnited States · 41 kmHigh 28.5°C · Low 19.9°C · 103 mm rain
- Brooklyn in JulyUnited States · 42 kmHigh 28.6°C · Low 20.3°C · 103 mm rain
- Trenton in JulyUnited States · 44 kmHigh 29.6°C · Low 20.0°C · 106 mm rain
- Passaic in JulyUnited States · 45 kmHigh 28.9°C · Low 19.8°C · 106 mm rain
- Manhattan in JulyUnited States · 48 kmHigh 28.6°C · Low 19.9°C · 103 mm rain
- Paterson in JulyUnited States · 49 kmHigh 28.9°C · Low 19.8°C · 109 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 Edison) is explained once on the Edison year overview and on the Sources, method and limits page.