Mundelein (IL) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Mundelein.
Climate overview of Mundelein
Mundelein, Illinois, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 28°C (82°F) in July, while winters cool to -1°C (30°F) in January.
The city has a wet climate, receiving around 1009 mm (40 in) of rain/snowfall per year. Despite the high annual total, it has warm summers and very cold winters. June is the wettest month. The most sunshine falls in July, with an average of 10.6 hours of daily sunshine.
Mundelein Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Mundelein - and find the best time to visit.
Monthly Temperature in Mundelein
Depending on the time of the year, temperatures range from comfortable to very cold in Mundelein. On average, daytime temperatures range from a comfortable 28°C (82°F) in July to a very cold -1°C (30°F) in January.
Nighttime temperatures range from 17°C (63°F) in July to -10°C (14°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Mundelein
Mundelein has a relatively rain/snowy climate with high precipitation levels, averaging 1009 mm (40 in) of rain/snowfall annually. The seasons in Mundelein bring significant changes in precipitation. The wettest month, June, receives high rainfall, with an average of 114 mm (4.5 in) of precipitation. This rainfall is distributed across 13 rainy days.
In contrast, the driest month, January, experiences much less snowfall, totaling 41 mm (1.6 in) over 10 snowy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Mundelein 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 Mundelein
In Mundelein, summer days are longer and more sunny, with daily sunshine hours peaking at 10.6 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 3.6 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Mundelein by Month
The relative humidity is high throughout the year in Mundelein.
The city experiences its highest humidity in December, reaching 76%. In May, the humidity drops to its lowest level at 64%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Mundelein
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
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -10°C (14°F).
Frequently asked questions about the climate in Mundelein
What is the best time to visit Mundelein?
September typically offers the most optimal weather in Mundelein. In contrast, January, February, March, November and December tend to have less optimal conditions. Mundelein has warm summers and very cold winters.
What temperatures can I expect in Mundelein?
Daytime highs range from -1°C (30°F) in January to 28°C (82°F) in July. Nighttime lows range from -10°C (14°F) to 17°C (63°F). Temperatures vary considerably through the year.
How much rain does Mundelein get?
Annual rainfall is around 1009 mm (40 in). June is the wettest month with 114 mm (4.5 in), while January is the driest with 41 mm (1.6 in).
How sunny is Mundelein?
Mundelein receives around 2,509 hours of sunshine per year. July is the sunniest month with 319 hours, while December is the cloudiest with just 107 hours. Overall, Mundelein enjoys abundant sunshine.
Mundelein 3-Day Forecast
Mundelein (IL) 3-Day Forecast
Mundelein on the map
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