Forest Park

Platte County, Illinois, United States

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Current Weather

26°

Drizzle

Feels Like: 27°

Min: 19°

Max: 30°

The next few hours will be overcast, with tomorrow reaching 23°C and dropping to 21°C. The coming days will be drizzle

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Hourly Forecast

28° 26° 24° 23° 23° 22° 22° 22° 21° 21° 20° 20° 19° 19° 19° 21° 22° 23° 22° 22° 22° 21° 20° 20°
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Today
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Daylight Hours

06:37

Sunrise

18:53

Sunset

12 hours 15 minutes of sunlight today

Moon

Waxing Crescent

11:33

Moonrise

20:23

Moonset

Daily Forecast

Today

19°
30°

Wednesday

19°
23°

Thursday

21°
25°

Friday

19°
22°

Saturday

19°
25°

Sunday

20°
22°

Monday

17°
21°

Tuesday

17°
21°

Wednesday

16°
22°

Thursday

15°
21°

Air Quality Data Available

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Weather in Forest Park tomorrow, September 16, 2026

Forest Park looks cloudy on September 16, 2026, with grey skies for much of the day. Sunshine stays limited, so the overall tone is muted from the morning onward. Expect a grey start, with morning cloud around 100% by 01:00. Outdoor plans early on should not rely on bright skies.

Expect highs of 23°C and cooler readings close to 19°C. Expect humidity between 82% and 96%, most humid near 03:00. A lighter breeze peaks around 03:00 near 4.7 km/h.

The afternoon keeps an overcast feel, as cloud reaches about 91% around 16:00. Outdoor plans may still want a flexible backup. Expect visibility near 14.3 km, with poorer spells close to 4.1 km. Sunrise is at 06:38 and sunset at 18:51, giving 12 hours 13 minutes of sunlight today.

Overall, Forest Park on September 16, 2026 stays grey and muted, so outdoor plans may want a flexible backup even with a high near 23°C.

Frequently asked questions about weather in Forest Park

How warm does it get in Forest Park?

The warmest month in Forest Park is July, with average high temperatures of 27°C. The average temperature during this period is around 23°C.

How cold does it get in Forest Park?

The coldest month in Forest Park is January, with average low temperatures of -5°C. The average temperature during this period is around -3°C.

What is the wettest time of year in Forest Park?

The wettest month in Forest Park is May, with an average of 121mm of precipitation.

What is the driest time of year in Forest Park?

The driest month in Forest Park is February, with an average of 56mm of precipitation.

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Metric (°C, km/h)