Waukegan Weather in September

September in Waukegan brings high temperatures, with daytime highs of 22°C (72°F) and nights around 13°C (55°F). Quite a bit of rainfall is expected, around 94 mm (3.7 in), so pack an umbrella.

Rainfall in Waukegan in September

Typically, you can expect about 10 days of rain this month, with 94 mm (3.7 in) on average. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Waukegan in September

If you're visiting Waukegan in September, expect perfect temperatures with highs of 22°C (72°F) and overnight lows of 13°C (55°F). This kind of day-to-night contrast is typical for this time of year. At 13°C (55°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Waukegan in September

Expect a lot of sunshine this month, with about 226 hours of sun. These sunny conditions add to the overall experience.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. July, August and September typically offer the best weather for Waukegan.

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For a detailed overview over the year and the best time to visit the United States of America, check out our Waukegan's climate page.

Waukegan Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 22°C (72°F)  

Chance of Rain 33%  

Precipitation 94 mm (3.7 in)  

Rainy days 10 days  

Humidity 71% *  

Sunshine 226 hours *  

Percentage Sunshine 60% *  

* Data from: Chicago, the United States of America (42 KM, 26 Miles).

What to Wear in Waukegan in September

For Waukegan in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Waukegan in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Waukegan's climate page.

More climate data for Waukegan

Temperature Rainfall Sunshine Humidity

See the full Waukegan climate overview or explore weather in the United States of America.