Plainsboro (NJ) Temperature by Month
The average annual maximum temperature in Plainsboro, New Jersey, United States of America is 18°C (64°F), with daytime highs ranging from 4°C (39°F) in January to 31°C (88°F) in July. This page covers monthly averages, day-night differences, and how Plainsboro compares to cities worldwide.
Plainsboro Monthly Temperatures
In Plainsboro, temperatures differ significantly between summer and winter months. Nighttime lows reflect this range, dropping from 18°C (64°F) in July to -6°C (21°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Plainsboro by month:
Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. July, the warmest month of the year, receives 269 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Plainsboro vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
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Plainsboro vs World: Temperature Compared
Plainsboro's average annual maximum temperature is 18°C (64°F). To put that in context, here's how it compares to a few well-known destinations:
Seville, Spain averages 23°C (73°F) a year — one of the warmer cities in Western Europe, with long hot summers.
Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.
Chicago, USA averages 15°C (59°F) annually — known for extreme seasonal swings, from bitterly cold winters to warm summers.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Global average temperatures have risen by around 1.2°C since the pre-industrial era, and the effects are visible across many regions. Winters are milder on average, with fewer frost days and less snow in many parts of the world. Heatwaves are more frequent and more intense, and Europe's summers of 2018, 2019, and 2020 all set records.
Summers are also getting drier in some areas, while winter rainfall has increased in others. This contributies to higher river levels and more flooding. In many countries, spring arrives earlier and autumn lasts longer. It has knock-on effects for wildlife, agriculture, and local ecosystems.
For more on Plainsboro's weather — including monthly rainfall, sunshine hours, and humidity — visit our Plainsboro climate page.
