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.