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Fairfield, IL 14 Day Weather - 62809 WeatherWorld.com
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Fairfield, IL Weather Forecast
Fairfield, IL Weather Forecast Dated: 316 PM Wed Sep 09 2026
Expect a hot stretch with a mix of sun and clouds and frequent chances of rain over the coming period. generally humid conditions and no major pressure swings will dominate.
Wednesday, September 9, 2026
Mid-Morning
82°F 28°C
Sunny
Mid-Afternoon
92°F 33°C
Scattered Showers
Early-Evening
80°F 27°C
Scattered Showers
Sizzling hot near 92°F 33°C with a heat index reaching 98°F 36°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds turning from the SW to the NE at 7 mph 11 km/h.
Thursday, September 10, 2026
Mid-Morning
73°F 23°C
Light Showers
Mid-Afternoon
74°F 23°C
Light Showers
Early-Evening
71°F 22°C
Light Showers
Comfortable with temperatures reaching 74°F 23°C, persistent showers off and on through the day, with steady humidity and steady pressure. Winds switching from the SSW to the NNE at 6 mph 10 km/h.
Friday, September 11, 2026
Mid-Morning
69°F 20°C
Overcast
Mid-Afternoon
84°F 29°C
Overcast
Early-Evening
77°F 25°C
Overcast
Quite warm around 84°F 29°C, overcast throughout the day, with steady humidity and steady pressure.
Saturday, September 12, 2026
Mid-Morning
75°F 24°C
Sunny
Mid-Afternoon
87°F 31°C
Light Showers
Early-Evening
76°F 25°C
Scattered Showers
Warm and summery around 87°F 31°C (feels like 91°F 33°C), periods of heavy rain and gusty conditions, with increasing humidity and steady pressure.
Sunday, September 13, 2026
Mid-Morning
74°F 23°C
Sunny
Mid-Afternoon
91°F 33°C
Sunny
Early-Evening
85°F 29°C
Partly Cloudy
Hot and sweltering around 91°F 33°C (heat index 94°F 35°C), partly cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure.
Monday, September 14, 2026
Mid-Morning
82°F 28°C
Cloudy
Mid-Afternoon
96°F 36°C
Sunny
Early-Evening
90°F 32°C
Partly Cloudy
Very hot with a high of 96°F 36°C, feeling closer to 100°F 38°C in the humidity, partly cloudy throughout the day, with lower humidity and barometric pressure falling. Winds SW at 11 mph 18 km/h.
Tuesday, September 15, 2026
Mid-Morning
83°F 29°C
Cloudy
Mid-Afternoon
93°F 34°C
Sunny
Early-Evening
78°F 26°C
Nearby Thunderstorms
Sizzling hot near 93°F 34°C with a heat index reaching 99°F 37°C, periods of heavy thunderstorms, with increasing humidity and steady pressure. Winds swinging from the WSW to the NNE at 10 mph 16 km/h. Gusts up to 23 mph 36 km/h.
Wednesday, September 16, 2026
Mid-Morning
69°F 21°C
Overcast
Mid-Afternoon
81°F 27°C
Scattered Showers
Early-Evening
77°F 25°C
Overcast
Quite warm around 81°F 27°C, scattered downpours possible, with lower humidity and steady pressure.
Thursday, September 17, 2026
Mid-Morning
75°F 24°C
Sunny
Mid-Afternoon
82°F 28°C
Cloudy
Early-Evening
72°F 23°C
Scattered Showers
Warm temperatures up to 82°F 28°C, locally heavy downpours at times, with increasing humidity and steady pressure. Winds blowing from the N at 12 mph 19 km/h.
Friday, September 18, 2026
Mid-Morning
72°F 22°C
Sunny
Mid-Afternoon
86°F 30°C
Sunny
Early-Evening
81°F 28°C
Sunny
Very warm with a high of 86°F 30°C, sunny throughout the day, with steady humidity and barometric pressure falling.
Saturday, September 19, 2026
Mid-Morning
82°F 28°C
Sunny
Mid-Afternoon
102°F 39°C
Overcast
Early-Evening
94°F 35°C
Cloudy
Dangerously hot temperatures around 102°F 39°C, cloudy in the morning, overcast in the afternoon, and sunny this evening, with lower humidity and barometric pressure falling. Winds turning from the SW to the WNW at 9 mph 14 km/h.
Sunday, September 20, 2026
Mid-Morning
82°F 28°C
Sunny
Mid-Afternoon
96°F 36°C
Sunny
Early-Evening
88°F 31°C
Sunny
Very hot with a high of 96°F 36°C, feeling closer to 99°F 37°C in the humidity, sunny throughout the day, with lower humidity and steady pressure. Winds switching from the NW to the NNE at 8 mph 13 km/h.
Monday, September 21, 2026
Mid-Morning
79°F 26°C
Scattered Showers
Mid-Afternoon
92°F 34°C
Partly Cloudy
Early-Evening
79°F 27°C
Nearby Thunderstorms
Sizzling hot near 92°F 34°C with a heat index reaching 97°F 36°C, periods of heavy rain and gusty conditions, with increasing humidity and steady pressure. Winds moving from the SE to the SSW at 7 mph 12 km/h.
Tuesday, September 22, 2026
Mid-Morning
74°F 23°C
Light Fog
Mid-Afternoon
78°F 26°C
Scattered Showers
Early-Evening
74°F 24°C
Overcast
Mild temperatures up to 78°F 26°C, scattered downpours possible, with steady humidity and steady pressure. Winds swinging from the W to the WNW at 5 mph 7 km/h.
Fairfield, IL Weather Radar Map
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