Riverwoods (IL) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Riverwoods.
Climate overview of Riverwoods
Riverwoods, 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.
Rain/snowfall is high, totalling around 1015 mm (40 in) per year. June is the wettest month and January the driest. The city also experiences warm summers and very cold winters. The sunniest month is July, with 10.6 hours of sunshine per day on average.
Riverwoods Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Riverwoods - and find the best time to visit.
Monthly Temperature in Riverwoods
Depending on the time of the year, temperatures range from comfortable to very cold in Riverwoods. Average maximum daytime temperatures range from a comfortable 28°C (82°F) in July, the warmest time of the year, to a very cold -1°C (30°F) during cooler months like January.
At night, you can expect temperatures ranging from 18°C (64°F) in July to around -9°C (16°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Riverwoods
Riverwoods has a relatively rain/snowy climate with high precipitation levels, averaging 1015 mm (40 in) of rain/snowfall annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, June it receives high rainfall, averaging 116 mm (4.6 in) of precipitation, recorded across 13 rainy days. In contrast, the driest month January brings less snowfall, with 46 mm (1.8 in) over 10 snowy days. For more details, please visit our Riverwoods 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 Riverwoods
Seasonal changes in sunshine hours are quite dramatic in Riverwoods. 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
Humidity in Riverwoods by Month
The relative humidity is high throughout the year in Riverwoods.
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
Wind Speed in Riverwoods
The mean wind speed over the year ranges from 4 m/s (8 knots) in June, July, August and September to 6 m/s (12 knots) in January, March and April. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Riverwoods
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
- Fewer rainy days: January, February, March, September and November
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -9°C (16°F).
Frequently asked questions about the climate in Riverwoods
What is the best time to visit Riverwoods?
September typically offers the most optimal weather in Riverwoods. In contrast, January, February, March, November and December tend to have less optimal conditions. Riverwoods has warm summers and very cold winters.
What temperatures can I expect in Riverwoods?
Daytime highs range from -1°C (30°F) in January to 28°C (82°F) in July. Nighttime lows range from -9°C (16°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Riverwoods get?
Annual rainfall is around 1015 mm (40 in). June is the wettest month with 116 mm (4.6 in), while January is the driest with 46 mm (1.8 in).
How sunny is Riverwoods?
Riverwoods 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, Riverwoods enjoys abundant sunshine.
Riverwoods 3-Day Forecast
Riverwoods on the map
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