Frankfort, Illinois
Updated Aug 18, 2025 9:48 AM

Today

Aug 18, 2025

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88°F71°F
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Daytime

88°F

Chance Showers And Thunderstorms

A chance of showers and thunderstorms. Partly sunny, with a high near 88. Heat index values as high as 99. South southeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.

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Tonight

71°F

Chance Showers And Thunderstorms

A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Heat index values as high as 95. South wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

Tuesday

Aug 19, 2025

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87°F69°F
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Daytime

87°F

Chance Showers And Thunderstorms

A chance of showers and thunderstorms. Partly sunny, with a high near 87. Heat index values as high as 95. West wind 5 to 10 mph. Chance of precipitation is 50%.

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Tonight

69°F

Slight Chance Showers And Thunderstorms then Mostly Cloudy

A slight chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 69. North wind 5 to 10 mph. Chance of precipitation is 20%.

Wednesday

Aug 20, 2025

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79°F64°F
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Daytime

79°F

Mostly Sunny

Mostly sunny, with a high near 79.

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Tonight

64°F

Mostly Clear

Mostly clear, with a low around 64.

Thursday

Aug 21, 2025

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81°F62°F
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Daytime

81°F

Sunny

Sunny, with a high near 81.

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Tonight

62°F

Mostly Clear

Mostly clear, with a low around 62.

Friday

Aug 22, 2025

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84°F64°F
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Daytime

84°F

Sunny

Sunny, with a high near 84.

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Tonight

64°F

Partly Cloudy

Partly cloudy, with a low around 64.

Saturday

Aug 23, 2025

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83°F59°F
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Daytime

83°F

Sunny

Sunny, with a high near 83.

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Tonight

59°F

Mostly Clear

Mostly clear, with a low around 59.

Sunday

Aug 24, 2025

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76°F
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Daytime

76°F

Sunny

Sunny, with a high near 76.