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Edison, NJ Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Edison, NJ?
Edison, NJ gets 49.5 in of precipitation a year over about 125 rainy days, and about 29.0 in of snow a season. July is the warmest month (average high 87°F) and January the coldest (average low 23°F).
Humid continental climate
Edison, NJ has hot summers and chilly winters. Daytime highs range from about 40°F in January to 87°F in July. June is usually the wettest month, and snow falls in winter. The most comfortable time to visit is typically April to May and September to October, when daytime highs sit near 70°F.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 25° | 43° |
| Spring | Mar–May | 41° | 62° |
| Summer | Jun–Aug | 63° | 84° |
| Autumn | Sep–Nov | 45° | 67° |
How much rain does Edison get?
Edison gets 49.5 in of precipitation in an average year, spread over about 125 days with measurable rain. That is more rainy days than 82% of the US.
June is the wettest month, with 4.8 in. February is the driest, with 3.0 in. May has the most rainy days, about 13.
The longest dry spell in the last five years lasted 41 days, to November 10, 2024.
From September 2025 to August 2026 Edison got 39.1 in of rain, against a normal of 49.5 in for those months. August 2026 had the most, with 8.5 in.
See where Edison ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in New Jersey.
Does it snow in Edison?
Yes. Edison gets about 29.0 in of snow in an average season, measured at the reporting station.
The snowiest winter on record is 1995–96, with 78.4 in.
The most recent measurable snow at the station fell on February 25, 2026.
From September 2025 to August 2026 the station measured 54.5 in of snow, against a normal of 29.0 in for those months. February 2026 had the most, with 29.3 in.
See where Edison ranks: snowiest cities in the US.
Edison weather by month
Edison weather in January
In January, Edison averages a high of 40°F and a low of 23°F. It gets 3.7 in of precipitation over about 11 rainy days. Estimated sunshine is 39% of daylight hours, derived from ERA5 cloud cover. The January record high is 72°F (2007) and the record low is -13°F (1984).
Edison weather in February
In February, Edison averages a high of 43°F and a low of 24°F. It gets 3.0 in of precipitation over about 10 rainy days. Estimated sunshine is 41% of daylight hours, derived from ERA5 cloud cover. The February record high is 79°F (2018) and the record low is -7°F (1979).
Edison weather in March
In March, Edison averages a high of 51°F and a low of 31°F. It gets 4.4 in of precipitation over about 11 rainy days. Estimated sunshine is 43% of daylight hours, derived from ERA5 cloud cover. The March record high is 88°F (1998) and the record low is 6°F (1980).
Edison weather in April
In April, Edison averages a high of 63°F and a low of 41°F. It gets 3.9 in of precipitation over about 12 rainy days. Estimated sunshine is 40% of daylight hours, derived from ERA5 cloud cover. The April record high is 95°F (2002) and the record low is 16°F (1982). April is one of the most comfortable months to visit.
Edison weather in May
In May, Edison averages a high of 72°F and a low of 50°F. It gets 4.0 in of precipitation over about 13 rainy days. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. The May record high is 97°F (2026) and the record low is 30°F (1983). May is one of the most comfortable months to visit.
Edison weather in June
In June, Edison averages a high of 81°F and a low of 60°F. It gets 4.8 in of precipitation over about 11 rainy days. Estimated sunshine is 42% of daylight hours, derived from ERA5 cloud cover. The June record high is 100°F (2025) and the record low is 40°F (2001).
Edison weather in July
In July, Edison averages a high of 87°F and a low of 65°F. It gets 4.8 in of precipitation over about 11 rainy days. Estimated sunshine is 43% of daylight hours, derived from ERA5 cloud cover. The July record high is 105°F (2010) and the record low is 45°F (1982).
Edison weather in August
In August, Edison averages a high of 85°F and a low of 64°F. It gets 4.7 in of precipitation over about 10 rainy days. Estimated sunshine is 42% of daylight hours, derived from ERA5 cloud cover. The August record high is 101°F (2001) and the record low is 40°F (1982).
Edison weather in September
In September, Edison averages a high of 78°F and a low of 56°F. It gets 4.2 in of precipitation over about 9 rainy days. Estimated sunshine is 46% of daylight hours, derived from ERA5 cloud cover. The September record high is 99°F (2010) and the record low is 35°F (1989). September is one of the most comfortable months to visit.
Edison weather in October
In October, Edison averages a high of 67°F and a low of 44°F. It gets 4.1 in of precipitation over about 10 rainy days. Estimated sunshine is 50% of daylight hours, derived from ERA5 cloud cover. The October record high is 95°F (2019) and the record low is 25°F (1974). October is one of the most comfortable months to visit.
Edison weather in November
In November, Edison averages a high of 55°F and a low of 35°F. It gets 3.4 in of precipitation over about 9 rainy days. Estimated sunshine is 57% of daylight hours, derived from ERA5 cloud cover. The November record high is 83°F (2024) and the record low is 9°F (2018).
Edison weather in December
In December, Edison averages a high of 46°F and a low of 28°F. It gets 4.5 in of precipitation over about 10 rainy days. Estimated sunshine is 41% of daylight hours, derived from ERA5 cloud cover. The December record high is 76°F (1998) and the record low is -7°F (1980).
Sunshine, humidity and wind in Edison
November is the sunniest month in Edison, with estimated sunshine of 57% of daylight hours from ERA5 cloud cover. May is the cloudiest, at 38%. The annual cloud-cover estimate is 44% of daylight hours; it is not a measurement of sunshine duration. Edison is cloudier than 71% of the US.
Humidity peaks in September at 68% and is lowest in March at 54%.
Edison has about 21 days a year above 90°F. Edison is cooler than 59% of the US.
Thunderstorms occur on about 4 days a year.
See where Edison ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.
First and last freeze in Edison
The first fall freeze in Edison typically comes around October 23, and the last spring freeze around April 16. That leaves a frost-free growing season of about 190 days.
Edison weather records
These records cover NEW BRUNSWICK 3 SE during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Edison station is 105°F, on July 7, 2010. The coldest is -13°F, on January 22, 1984.
The wettest day in the available station history brought 8.0 in of precipitation, on August 28, 2011.
37 all-time records have been set at the station since 1970.
The annual mean temperature has changed by +0.6°F per decade since 1970.
The best time to visit Edison
The most comfortable time to visit is typically April to May and September to October, when daytime highs sit near 70°F.
Winter (December–February) is chilly, with average highs around 43°F and lows near 25°F. Snow is possible.
Spring (March–May) is mild, with average highs around 62°F and lows near 41°F.
Summer (June–August) is hot, with average highs around 84°F and lows near 63°F.
Autumn (September–November) is mild, with average highs around 67°F and lows near 45°F.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | 23° | 40° | 3.7 in | 11 | 62% | 39% | 72° | -13° |
| February | 24° | 43° | 3.0 in | 10 | 60% | 41% | 79° | -7° |
| March | 31° | 51° | 4.4 in | 11 | 54% | 43% | 88° | 6° |
| April | 41° | 63° | 3.9 in | 12 | 55% | 40% | 95° | 16° |
| May | 50° | 72° | 4.0 in | 13 | 59% | 38% | 97° | 30° |
| June | 60° | 81° | 4.8 in | 11 | 60% | 42% | 100° | 40° |
| July | 65° | 87° | 4.8 in | 11 | 66% | 43% | 105° | 45° |
| August | 64° | 85° | 4.7 in | 10 | 67% | 42% | 101° | 40° |
| September | 56° | 78° | 4.2 in | 9 | 68% | 46% | 99° | 35° |
| October | 44° | 67° | 4.1 in | 10 | 67% | 50% | 95° | 25° |
| November | 35° | 55° | 3.4 in | 9 | 61% | 57% | 83° | 9° |
| December | 28° | 46° | 4.5 in | 10 | 66% | 41% | 76° | -7° |
Station: NEW BRUNSWICK 3 SE, 5 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Edison climate questions
How much rain does Edison get?
Edison gets 49.5 in of precipitation in an average year, over about 125 rainy days.
What is the wettest month in Edison?
June is the wettest month in Edison, with 4.8 in. February is the driest, with 3.0 in.
How many rainy days does Edison have a year?
Edison has about 125 days with measurable rain in an average year. May has the most, about 13.
Does it snow in Edison?
Yes. Edison gets about 29.0 in of snow in an average season. The snowiest winter on record is 1995–96, with 78.4 in.
What is the hottest month in Edison?
July is the warmest month in Edison, with an average high of 87°F.
What is the coldest month in Edison?
January is the coldest month in Edison, with an average low of 23°F.
What is the record high temperature in Edison?
Within the available 1970–2026 station history, the record high at the Edison station is 105°F, set on July 7, 2010. The record low is -13°F, on January 22, 1984.
What is the sunniest month in Edison?
November is the sunniest month in Edison, with estimated sunshine of 57% of daylight hours from ERA5 cloud cover. May is the cloudiest.
When is the first frost in Edison?
The first fall freeze in Edison typically comes around October 23. The last spring freeze is around April 16.
What is the best time to visit Edison?
The most comfortable time to visit is typically April to May and September to October, when daytime highs sit near 70°F.