Arlington Heights (IL) Weather and Climate: A Comprehensive Guide
The temperature in Arlington Heights can vary quite a bit throughout the year.
Temperatures can be warm during the warmest months,
and very cold during the cooler months.
It also has a notably wet climate with much precipitation.
Now, let’s explore all the climate details to give you a full picture.
Average maximum day and minimum night temperature
Visitors to Arlington Heights can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a comfortable 29°C in July, the warmest time of the year, to a very cold -1°C during cooler months like January.
At night, temperatures typically drop to an average of around -9°C during these months. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Arlington Heights is known for its substantial rain/snowfall, with annual precipitation reaching 1040 mm. Significant seasonal changes in precipitation occur throughout the year. During the wetter season, June receives high rainfall, averaging 124 mm of precipitation, recorded across 14 rainy days. In contrast, the drier season, January brings less snowfall, with 47 mm over 10 snowy days. For more details, please visit our Arlington Heights Precipitation page.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 Arlington Heights. While July receives considerable daily sunshine with up to 10.6 hours, December marks the darkest time of the year, where sunshine is scarce with only 3.6 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
Average humidity
The relative humidity is high throughout the year in Arlington Heights.
The city experiences its highest humidity in December, reaching 76%. In May, the humidity drops to its lowest level at 64%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
Average wind speed
The mean wind speed over the year ranges from 4 m/s in June, July, August and September to 6 m/s in January, March and April.
The mean monthly wind speed over the year (meters per second)
broken clouds and chance of slight rain overcast and no rain overcast and no rainForecast for Arlington Heights (IL)
6 m/s
3 m/s
2 m/s
The best time of year to visit Arlington Heights 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 coldest season / winter is in the following months: January, February and December.
July has an average maximum temperature of 29°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of -1°C.
June tops the wettest month list with 124 mm of rainfall.
January is the driest month with 47 mm of precipitation.
July is the sunniest month with an average of 319 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.
