Vernon Hills Weather in September

September in Vernon Hills brings high temperatures, with daytime highs of 24°C (75°F) and nights around 13°C (55°F). Quite a bit of rainfall is expected, around 91 mm (3.6 in), so pack an umbrella.

Rainfall in Vernon Hills in September

You can expect rain on roughly 10 days based on historical data, averaging 91 mm (3.6 in) for the month. 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 Vernon Hills in September

September in Vernon Hills is generally excellent, with days reaching 24°C (75°F) and nights settling around 13°C (55°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights cool down to 13°C (55°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Vernon Hills in September

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

If your ideal day consists of dry skies and pleasant temperatures, September typically offers the best circumstances for Vernon Hills.

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• January
• February
• March
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• May
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• October
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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 Vernon Hills's climate page.

Vernon Hills Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 24°C (75°F)  

Chance of Rain 33%  

Precipitation 91 mm (3.6 in)  

Rainy days 10 days  

Humidity 71% *  

Sunshine 226 hours *  

Percentage Sunshine 60% *  

* Data from: Chicago, the United States of America (27 KM, 16 Miles).

What to Wear in Vernon Hills in September

For Vernon Hills 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. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Vernon Hills in September

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

Swimming

9/10

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 Vernon Hills's climate page.

More climate data for Vernon Hills

Temperature Rainfall Sunshine Humidity

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