River Grove

Platte County, Illinois, United States

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Current Weather

21°

Overcast

Feels Like: 21°

Min: 20°

Max: 26°

The next few hours will be overcast, with today reaching 26°C and dropping to 20°C. The coming days will be mostly cloudy throughout the day.

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Hourly Forecast

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1pm
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Today
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Daylight Hours

06:38

Sunrise

18:51

Sunset

12 hours 13 minutes of sunlight today

Moon

Waxing Crescent

12:38

Moonrise

20:53

Moonset

Daily Forecast

Today

20°
26°

Thursday

20°
24°

Friday

19°
22°

Saturday

19°
24°

Sunday

19°
21°

Monday

17°
21°

Tuesday

16°
21°

Wednesday

17°
23°

Thursday

15°
21°

Friday

17°
20°

Air Quality Data Available

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UV Index

No protection needed
0 Low
Low Extreme

Humidity

93% Very Humid
Low High

Weather in River Grove today, September 16, 2026

Cloud cover dominates in River Grove on September 16, 2026, keeping sunshine limited. Expect a grey, overcast feel rather than long bright spells. Cloud leads the morning, peaking close to 100% near 02:00. Sunshine has little room until later in the day.

Expect highs of 26°C and cooler readings close to 20°C. The air stays humid, with relative humidity between 58% and 94% and the peak around 03:00. Winds stay light, near 4.1 km/h by 16:00, so the day feels still more than breezy.

Expect persistent cloud later on, with amounts around 100% by 12:00. Sunshine remains the exception, not the rule. Visibility stays generally good near 14.1 km on average, though it can drop toward 4.7 km in thicker cloud or showers. Expect sunrise at 06:38, sunset at 18:51, and 12 hours 13 minutes of sunlight today overall.

Taken together, overcast skies in River Grove on September 16, 2026 favour indoor or covered options, with temperatures near 26°C.

Frequently asked questions about weather in River Grove

How warm does it get in River Grove?

The warmest month in River Grove 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 River Grove?

The coldest month in River Grove 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 River Grove?

The wettest month in River Grove is May, with an average of 121mm of precipitation.

What is the driest time of year in River Grove?

The driest month in River Grove is February, with an average of 56mm of precipitation.

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Metric (°C, km/h)