Iselin (NJ) Climate by Month
The temperature in Iselin can vary quite a bit throughout the year.
Temperatures can be very warm during the warmest months,
and cold during the cooler months.
It also has a notably wet climate with much precipitation.
Let's now guide you through the climate details for a complete overview.
Average day and night temperature
Visitors to Iselin can expect significant temperature changes throughout the year. Average daytime temperatures range from a very warm 31°C in July, the warmest time of the year, to a chilly 5°C during cooler months like January. At night, temperatures typically average around -5°C during these months.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Iselin is known for its substantial rain/snowfall, with annual precipitation reaching 1238 mm. While rainfall varies throughout the year, each season offers its own charm. December brings wetter days averaging 128 mm of precipitation, spread over 11 rainy days. In contrast, November experiences a drier climate, with about 75 mm of rainfall spread across 9 rainy days.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Seasonal changes in sunshine hours are quite dramatic in Iselin. 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.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is low throughout the year in Iselin.
Relative humidity over the year
The best time of year to visit Iselin in the United States of America
During the months of May and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
The hottest season / summer takes place in June, July, August and September.
July has an average maximum temperature of 31°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 5°C.
December tops the wettest month list with 128 mm of rainfall.
November is the driest month with 75 mm of precipitation.
July is the sunniest month with an average of 271 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
