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Naperville, IL Weather Forecast


Naperville, IL Weather Forecast Dated: 1140 AM Fri Sep 11 2026
Expect a mild stretch with a mix of sun and clouds and occasional showers over the coming period. generally humid conditions and no major pressure swings will dominate.
Friday, September 11, 2026
Mid-Morning
69°F 20°C
Sunny
Mid-Afternoon
83°F 28°C
Sunny
Early-Evening
72°F 22°C
Sunny
Warm and summery near 83°F 28°C, sunny throughout the day, with increasing humidity and barometric pressure falling.
Saturday, September 12, 2026
Mid-Morning
68°F 20°C
Sunny
Mid-Afternoon
80°F 27°C
Sunny
Early-Evening
77°F 25°C
Sunny
Quite warm reaching 80°F 27°C, feeling like 83°F 28°C during peak afternoon, sunny throughout the day, with steady humidity and steady pressure. Winds out of the SW at 10 mph 17 km/h.
Sunday, September 13, 2026
Mid-Morning
68°F 20°C
Overcast
Mid-Afternoon
70°F 21°C
Overcast
Early-Evening
66°F 19°C
Overcast
Enjoyable around 70°F 21°C, overcast throughout the day, with lower humidity and steady pressure. Winds switching from the NE to the ENE at 8 mph 13 km/h.
Monday, September 14, 2026
Mid-Morning
61°F 16°C
Overcast
Mid-Afternoon
69°F 20°C
Overcast
Early-Evening
75°F 24°C
Cloudy
Mild temperatures up to 69°F 20°C, overcast through the afternoon, turning partly cloudy this evening, with increasing humidity and barometric pressure falling. Winds moving from the E to the SE at 13 mph 20 km/h. Gusts up to 30 mph 47 km/h.
Tuesday, September 15, 2026
Mid-Morning
72°F 22°C
Scattered Showers
Mid-Afternoon
80°F 27°C
Overcast
Early-Evening
75°F 24°C
Overcast
Quite warm reaching 80°F 27°C, feeling like 84°F 29°C during peak afternoon, scattered downpours possible, with steady humidity and steady pressure. Winds swinging from the WSW to the N at 5 mph 8 km/h.
Wednesday, September 16, 2026
Mid-Morning
69°F 20°C
Light Showers
Mid-Afternoon
66°F 19°C
Light Showers
Early-Evening
63°F 18°C
Light Showers
Mildly cool near 66°F 19°C, on-and-off showers throughout the day, with steady humidity and steady pressure. Winds blowing from the NNE at 11 mph 18 km/h. Gusts up to 22 mph 35 km/h.
Thursday, September 17, 2026
Mid-Morning
58°F 14°C
Overcast
Mid-Afternoon
65°F 18°C
Overcast
Early-Evening
60°F 16°C
Sunny
Comfortable at 65°F 18°C, overcast in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and steady pressure. Winds WSW at 11 mph 18 km/h.
Friday, September 18, 2026
Mid-Morning
56°F 13°C
Sunny
Mid-Afternoon
65°F 18°C
Sunny
Early-Evening
60°F 16°C
Sunny
Cool with a high near 65°F 18°C, sunny throughout the day, with steady humidity and barometric pressure falling.
Saturday, September 19, 2026
Mid-Morning
56°F 13°C
Partly Cloudy
Mid-Afternoon
68°F 20°C
Sunny
Early-Evening
63°F 17°C
Sunny
Mild temperatures up to 68°F 20°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure.
Sunday, September 20, 2026
Mid-Morning
60°F 16°C
Sunny
Mid-Afternoon
71°F 22°C
Sunny
Early-Evening
66°F 19°C
Sunny
Mild with a high of 71°F 22°C, sunny throughout the day, with steady humidity and steady pressure.
Monday, September 21, 2026
Mid-Morning
64°F 18°C
Sunny
Mid-Afternoon
72°F 22°C
Partly Cloudy
Early-Evening
66°F 19°C
Partly Cloudy
Pleasant near 72°F 22°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds out of the SSE at 8 mph 13 km/h.
Tuesday, September 22, 2026
Mid-Morning
62°F 16°C
Sunny
Mid-Afternoon
73°F 23°C
Sunny
Early-Evening
70°F 21°C
Overcast
Comfortable with temperatures reaching 73°F 23°C, cloudy through the afternoon, turning overcast this evening, with steady humidity and steady pressure. Winds moving from the SSE to the SE at 5 mph 8 km/h.
Wednesday, September 23, 2026
Mid-Morning
66°F 19°C
Partly Cloudy
Mid-Afternoon
76°F 25°C
Sunny
Early-Evening
72°F 22°C
Sunny
Enjoyable around 76°F 25°C, cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure.
Thursday, September 24, 2026
Mid-Morning
67°F 20°C
Overcast
Mid-Afternoon
75°F 24°C
Overcast
Early-Evening
72°F 22°C
Scattered Showers
Mild temperatures up to 75°F 24°C, scattered downpours possible, with steady humidity and steady pressure. Winds swinging from the SE to the S at 6 mph 9 km/h.
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