Niantic, IL 14 Day Weather - 62551 WeatherWorld.com
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Niantic, IL Weather Forecast


Niantic, IL Weather Forecast Dated: 351 AM Tue Sep 08 2026
Expect a very warm period with a mix of sun and clouds and frequent chances of rain over the coming period. moderate humidity and no major pressure swings will dominate.
Tuesday, September 8, 2026
Mid-Morning
74°F 23°C
Cloudy
Mid-Afternoon
92°F 33°C
Partly Cloudy
Early-Evening
84°F 29°C
Cloudy
Very hot with temperatures reaching 92°F 33°C, cloudy through the afternoon, turning overcast this evening, with lower humidity and steady pressure. Winds out of the SSW at 7 mph 11 km/h.
Wednesday, September 9, 2026
Mid-Morning
81°F 27°C
Scattered Showers
Mid-Afternoon
93°F 34°C
Partly Cloudy
Early-Evening
78°F 26°C
Light Showers
Hot and sweltering around 93°F 34°C (heat index 96°F 35°C), scattered downpours possible, with increasing humidity and steady pressure. Winds switching from the WSW to the SW at 8 mph 13 km/h.
Thursday, September 10, 2026
Mid-Morning
73°F 23°C
Overcast
Mid-Afternoon
81°F 27°C
Overcast
Early-Evening
75°F 24°C
Scattered Showers
Very warm near 81°F 27°C, though humidity makes it feel like 84°F 29°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds moving from the NNW to the NE at 8 mph 12 km/h.
Friday, September 11, 2026
Mid-Morning
72°F 22°C
Cloudy
Mid-Afternoon
90°F 32°C
Sunny
Early-Evening
81°F 27°C
Sunny
Hot temperatures near 90°F 32°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure falling. Winds swinging from the SSE to the SE at 8 mph 13 km/h.
Saturday, September 12, 2026
Mid-Morning
74°F 23°C
Overcast
Mid-Afternoon
93°F 34°C
Sunny
Early-Evening
88°F 31°C
Sunny
Hot and sweltering around 93°F 34°C (heat index 96°F 36°C), overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds shifting from the SW to the S at 7 mph 11 km/h.
Sunday, September 13, 2026
Mid-Morning
77°F 25°C
Light Showers
Mid-Afternoon
98°F 37°C
Sunny
Early-Evening
92°F 33°C
Partly Cloudy
Very hot with temperatures reaching 98°F 37°C, morning showers, giving way to clearing skies, with lower humidity and barometric pressure falling. Winds turning from the SSW to the SSE at 12 mph 18 km/h. Gusts up to 22 mph 36 km/h.
Monday, September 14, 2026
Mid-Morning
87°F 30°C
Sunny
Mid-Afternoon
96°F 36°C
Sunny
Early-Evening
87°F 31°C
Overcast
Sizzling hot near 96°F 36°C with a heat index reaching 99°F 37°C, sunny in the morning, cloudy in the afternoon, and overcast this evening, with steady humidity and steady pressure. Winds switching from the SSW to the SW at 10 mph 16 km/h.
Tuesday, September 15, 2026
Mid-Morning
59°F 15°C
Scattered Showers
Mid-Afternoon
68°F 20°C
Sunny
Early-Evening
61°F 16°C
Sunny
Enjoyable around 68°F 20°C, scattered downpours possible, with lower humidity and steady pressure. Winds moving from the NW to the NNW at 11 mph 18 km/h. Gusts up to 21 mph 33 km/h.
Wednesday, September 16, 2026
Mid-Morning
55°F 13°C
Sunny
Mid-Afternoon
68°F 20°C
Partly Cloudy
Early-Evening
62°F 17°C
Overcast
Mild temperatures up to 68°F 20°C, sunny in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds swinging from the N to the NE at 8 mph 13 km/h.
Thursday, September 17, 2026
Mid-Morning
57°F 14°C
Overcast
Mid-Afternoon
72°F 22°C
Overcast
Early-Evening
67°F 20°C
Overcast
Mild with a high of 72°F 22°C, overcast through the afternoon, turning cloudy this evening, with lower humidity and barometric pressure falling.
Friday, September 18, 2026
Mid-Morning
68°F 20°C
Overcast
Mid-Afternoon
81°F 27°C
Overcast
Early-Evening
76°F 25°C
Overcast
Warm and summery near 81°F 27°C, overcast through the afternoon, turning cloudy this evening, with steady humidity and barometric pressure falling. Winds shifting from the S to the SSE at 8 mph 14 km/h.
Saturday, September 19, 2026
Mid-Morning
56°F 13°C
Light Showers
Mid-Afternoon
61°F 16°C
Overcast
Early-Evening
56°F 14°C
Overcast
Cool with a high near 61°F 16°C, morning showers, giving way to clearing skies, with lower humidity and barometric pressure rising. Winds turning from the ESE to the NNE at 13 mph 20 km/h. Gusts up to 22 mph 35 km/h.
Sunday, September 20, 2026
Mid-Morning
54°F 12°C
Partly Cloudy
Mid-Afternoon
67°F 20°C
Sunny
Early-Evening
60°F 15°C
Sunny
Refreshing around 67°F 20°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and barometric pressure falling. Winds ENE at 8 mph 13 km/h.
Monday, September 21, 2026
Mid-Morning
57°F 14°C
Sunny
Mid-Afternoon
73°F 23°C
Sunny
Early-Evening
64°F 18°C
Sunny
Mild temperatures up to 73°F 23°C, sunny throughout the day, with steady humidity and steady pressure. Winds out of the NE at 6 mph 9 km/h.
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