Plainsboro (NJ) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Plainsboro.
Climate overview of Plainsboro
Plainsboro, New Jersey, United States of America, sees big temperature differences between seasons, with July peaking at 31°C (88°F) and January dropping to 4°C (39°F).
Rain/snowfall is high, totalling around 1260 mm (50 in) per year. July is the wettest month and February the driest. The city also experiences very warm summers and cold winters. The most sunshine falls in July, with an average of 9.0 hours of daily sunshine.
Plainsboro Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Plainsboro - and find the best time to visit.
Monthly Temperature in Plainsboro
Visitors to Plainsboro can expect significant temperature changes throughout the year. 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 18°C (64°F) in July to around -6°C (21°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Plainsboro
Plainsboro is known for its substantial rain/snowfall, with annual precipitation reaching 1260 mm (50 in). While rainfall varies throughout the year, each season offers its own charm. July brings wetter days averaging 139 mm (5.5 in) of precipitation, spread over 12 rainy days.
In contrast, the driest month February experiences a drier climate, with about 74 mm (2.9 in) of snow/rainfall spread across 10 snowy/rainy days. For more details, please visit our Plainsboro 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 Plainsboro
Seasonal changes in sunshine hours are quite dramatic in Plainsboro. 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
Best Time to Visit Plainsboro
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: June and July
- Fewest rainy days: February, March, September and November
- Seasonal pattern: Very warm summers and cold winters
- Coldest conditions: January, with freezing nights around -6°C (21°F).
Frequently asked questions about the climate in Plainsboro
What is the best time to visit Plainsboro?
September typically offers the most optimal weather in Plainsboro. In contrast, January, February and December tend to have less optimal conditions. Plainsboro has very warm summers and cold winters.
What temperatures can I expect in Plainsboro?
Daytime highs range from 4°C (39°F) in January to 31°C (88°F) in July. Nighttime lows range from -6°C (21°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Plainsboro get?
Annual rainfall is around 1260 mm (50 in). July is the wettest month with 139 mm (5.5 in), while February is the driest with 74 mm (2.9 in).
How sunny is Plainsboro?
Plainsboro receives around 2,502 hours of sunshine per year. July is the sunniest month with 269 hours, while December is the cloudiest with just 140 hours. Overall, Plainsboro enjoys abundant sunshine.
Plainsboro 3-Day Forecast
Plainsboro (NJ) 3-Day Forecast
Plainsboro on the map
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