Harrison (NJ) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Harrison.
Climate overview of Harrison
Harrison, New Jersey, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 31°C (88°F) in July, while winters cool to 4°C (39°F) in January.
Rain/snowfall is high, totalling around 1263 mm (50 in) per year. June is the wettest month and November the driest. The city also experiences very warm summers and cold winters. The sunniest month is July, with 9.0 hours of sunshine per day on average.
Harrison Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Harrison - and find the best time to visit.
Monthly Temperature in Harrison
Depending on the time of the year, temperatures range from very warm to chilly in Harrison. Average maximum daytime temperatures range from a very warm 31°C (88°F) in July, the warmest time of the year, to a chilly 4°C (39°F) during cooler months like January.
At night, you can expect temperatures ranging from 21°C (70°F) in July to around -4°C (25°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Harrison
Harrison has a relatively rain/snowy climate with high precipitation levels, averaging 1263 mm (50 in) of rain/snowfall annually. While rainfall varies throughout the year, each season offers its own charm. June brings wetter days averaging 136 mm (5.4 in) of precipitation, spread over 13 rainy days.
In contrast, the driest month November experiences a drier climate, with about 76 mm (3 in) of rainfall spread across 8 rainy days. For more details, please visit our Harrison Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Harrison
Seasonal changes in sunshine hours are quite dramatic in Harrison. While July receives considerable daily sunshine with up to 9.0 hours, December marks the darkest time of the year, where sunshine is scarce with only 4.7 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Harrison
The mean water temperature over the year ranges from 4°C (39°F) in February to 23°C (73°F) in August.
Water temperature over the year
Humidity in Harrison by Month
The relative humidity is high throughout the year in Harrison.
The city experiences its highest humidity in September, reaching 68%. In April, the humidity drops to its lowest level at 55%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Harrison
The mean wind speed over the year ranges from 5 m/s (10 knots) in May, June, July, August, September and October to 7 m/s (14 knots) in March. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Harrison
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: September
- Warmest weather: July and August
- Most sunshine: May, June, July and August
- Fewer rainy days: February, March, September, October and November
- Best for swimming: July, August and September.
- Seasonal pattern: Very warm summers and cold winters
- Coldest conditions: January, with freezing nights around -4°C (25°F).
Frequently asked questions about the climate in Harrison
What is the best time to visit Harrison?
September typically offers the most optimal weather in Harrison. In contrast, January, February and December tend to have less optimal conditions. Harrison has very warm summers and cold winters.
What temperatures can I expect in Harrison?
Daytime highs range from 4°C (39°F) in January to 31°C (88°F) in July. Nighttime lows range from -4°C (25°F) to 21°C (70°F). Temperatures vary considerably through the year.
How much rain does Harrison get?
Annual rainfall is around 1263 mm (50 in). June is the wettest month with 136 mm (5.4 in), while November is the driest with 76 mm (3 in).
How sunny is Harrison?
Harrison receives around 2,544 hours of sunshine per year. July is the sunniest month with 271 hours, while December is the cloudiest with just 141 hours. Overall, Harrison enjoys abundant sunshine.
Harrison 3-Day Forecast
Harrison on the map
Harrison is highlighted - select any city to see its climate.
Popular this month
Where to go in August - average daytime high across popular destinations.
Kissimmee
33°C (91°F) Orlando33°C (91°F) Miami Beach32°C (90°F) Destin32°C (90°F) New York City
29°C (84°F) Big Bear Lake
27°C (81°F) Los Angeles
24°C (75°F) San Francisco22°C (72°F) 
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Sedona: Explore Majestic Red Rock Landscapes
A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States
Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.