Zion

Sweet Grass County, Illinois, United States

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Current Weather

24°

Rain

Feels Like: 23°

Min: 18°

Max: 26°

The next few hours will be overcast, with tomorrow reaching 21°C and dropping to 18°C. The coming days will be mostly cloudy starting in the afternoon.

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Compare today's weather with yesterday's data and track temperature trends over time.

Hourly Forecast

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1am
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5am
6am
7am
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Today
Tomorrow

Daylight Hours

06:37

Sunrise

18:53

Sunset

12 hours 16 minutes of sunlight today

Moon

Waxing Crescent

11:35

Moonrise

20:22

Moonset

Daily Forecast

Today

18°
26°

Wednesday

17°
21°

Thursday

18°
22°

Friday

17°
20°

Saturday

17°
23°

Sunday

17°
20°

Monday

15°
20°

Tuesday

14°
20°

Wednesday

14°
20°

Thursday

16°
19°

Air Quality Data Available

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UV Index

No protection needed
1 Low
Low Extreme

Humidity

83% Humid
Low High

Weather in Zion tomorrow, September 16, 2026

Cloud cover dominates in Zion on September 16, 2026, keeping sunshine limited. Expect a grey, overcast feel rather than long bright spells. Expect a grey start, with morning cloud around 100% by 00:00. Outdoor plans early on should not rely on bright skies.

The day peaks near 21°C and cools toward 17°C. Relative humidity sits between 76% and 96%, reaching its peak around 07:00. A lighter breeze peaks around 11:00 near 4.4 km/h.

The afternoon keeps an overcast feel, as cloud reaches about 88% around 13:00. Outdoor plans may still want a flexible backup. Expect visibility near 15.5 km, with poorer spells close to 13.0 km. Expect sunrise at 06:38, sunset at 18:52, and 12 hours 13 minutes of sunlight today overall.

Taken together, overcast skies in Zion on September 16, 2026 favour indoor or covered options, with temperatures near 21°C.

Frequently asked questions about weather in Zion

How warm does it get in Zion?

The warmest month in Zion is August, with average high temperatures of 23°C. The average temperature during this period is around 22°C.

How cold does it get in Zion?

The coldest month in Zion is January, with average low temperatures of -4°C. The average temperature during this period is around -2°C.

What is the wettest time of year in Zion?

The wettest month in Zion is October, with an average of 118mm of precipitation.

What is the driest time of year in Zion?

The driest month in Zion is February, with an average of 62mm of precipitation.

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Metric (°C, km/h)