Evanston Weather in September

September in Evanston brings high temperatures, with highs of 24°C (75°F) and nights dropping to 15°C (59°F). Rainfall is on the higher side this month, averaging around 99 mm (3.9 in), so keep a rain jacket handy.

Rainfall in Evanston in September

Past climate data indicates that roughly 10 days will see rain, totalling around 99 mm (3.9 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Evanston in September

Evanston has excellent weather in September, with days reaching 24°C (75°F) and nights cooling to 15°C (59°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. With lows of 15°C (59°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Evanston in September

There are approximately 226 hours of sunshine this month, resulting in mostly clear days.

Wind Speed in Evanston in September

Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. September typically offers the best weather for Evanston.