Pontoon Beach (IL) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Pontoon Beach.
Climate overview of Pontoon Beach
Pontoon Beach, Illinois, United States of America, sees big temperature differences between seasons, with July peaking at 31°C (88°F) and January dropping to 5°C (41°F).
Rain/snowfall is high, totalling around 1113 mm (44 in) per year. April is the wettest month and January the driest. The city also experiences very warm summers and cold winters. The sunniest month is July, with 10.4 hours of sunshine per day on average.
Pontoon Beach Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Pontoon Beach - and find the best time to visit.
Monthly Temperature in Pontoon Beach
Visitors to Pontoon Beach 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 5°C (41°F) during cooler months like January.
At night, you can expect temperatures ranging from 21°C (70°F) in July to around -5°C (23°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Pontoon Beach
Pontoon Beach is known for its substantial rain/snowfall, with annual precipitation reaching 1113 mm (44 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, April it receives high rainfall, averaging 131 mm (5.2 in) of precipitation, recorded across 12 rainy days. In contrast, the driest month January brings less snow/rainfall, with 49 mm (1.9 in) over 7 snowy/rainy days. For more details, please visit our Pontoon Beach 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 Pontoon Beach
Seasonal changes in sunshine hours are quite dramatic in Pontoon Beach. While July receives considerable daily sunshine with up to 10.4 hours, December marks the darkest time of the year, where sunshine is scarce with only 4.3 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
Humidity in Pontoon Beach by Month
The relative humidity is high throughout the year in Pontoon Beach.
The city experiences its highest humidity in December, reaching 74%. In April, the humidity drops to its lowest level at 63%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Pontoon Beach
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: September and October
- Warmest weather: June, July and August
- Most sunshine: July
- Fewer rainy days: January, February, August, October and November
- Seasonal pattern: Very warm summers and cold winters
- Coldest conditions: January, with freezing nights around -5°C (23°F).
Frequently asked questions about the climate in Pontoon Beach
What is the best time to visit Pontoon Beach?
September and October typically offer the most optimal weather in Pontoon Beach. In contrast, January, February and December tend to have less optimal conditions. Pontoon Beach has very warm summers and cold winters.
What temperatures can I expect in Pontoon Beach?
Daytime highs range from 5°C (41°F) in January to 31°C (88°F) in July. Nighttime lows range from -5°C (23°F) to 21°C (70°F). Temperatures vary considerably through the year.
How much rain does Pontoon Beach get?
Annual rainfall is around 1113 mm (44 in). April is the wettest month with 131 mm (5.2 in), while January is the driest with 49 mm (1.9 in).
How sunny is Pontoon Beach?
Pontoon Beach receives around 2,594 hours of sunshine per year. July is the sunniest month with 311 hours, while December is the cloudiest with just 128 hours. Overall, Pontoon Beach enjoys abundant sunshine.
Pontoon Beach 3-Day Forecast
Pontoon Beach on the map
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