Climate averages 1991–2020
Edison weather
in May.
A mild, wet month: the 5th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Edison: daytime highs average 21.4°C and nights cool to about 11.6°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 90 mm of rain on roughly 11 days, which makes May a wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 25 min on an average May day.
The nearest other city in this atlas is Staten Island (24 km away). In May its highs average 21.0°C, about as warm as Edison, with 86 mm of rain.
Among the 498 cities listed in the United States, Edison ranks joint 323rd of 498 for the warmest May highs and joint 293rd of 498 for the driest May (rainfall, lowest first). The mean May high of those 498 cities is 23.8°C; Edison is 2.4°C cooler than that mean.
From May to June, average highs rise by 5.0°C to 26.4°C, and monthly rainfall rises from 90 mm to 106 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Staten Island in MayUnited States · 24 kmHigh 21.0°C · Low 11.7°C · 86 mm rain
- Newark in MayUnited States · 31 kmHigh 21.3°C · Low 11.3°C · 90 mm rain
- New York City in MayUnited States · 41 kmHigh 20.4°C · Low 11.0°C · 85 mm rain
- Brooklyn in MayUnited States · 42 kmHigh 20.3°C · Low 11.3°C · 85 mm rain
- Trenton in MayUnited States · 44 kmHigh 21.8°C · Low 11.6°C · 88 mm rain
- Passaic in MayUnited States · 45 kmHigh 20.8°C · Low 11.1°C · 90 mm rain
- Manhattan in MayUnited States · 48 kmHigh 20.6°C · Low 11.1°C · 85 mm rain
- Paterson in MayUnited States · 49 kmHigh 20.9°C · Low 11.1°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 Edison) is explained once on the Edison year overview and on the Sources, method and limits page.