Sycamore

Sweetwater County, Illinois, United States

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Current Weather

20°

Overcast

Feels Like: 12°

Min: 17°

Max: 22°

The next few hours will be overcast, with today reaching 22°C and dropping to 11°C. The coming days will be drizzle

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Hourly Forecast

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11pm
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Today
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Daylight Hours

06:42

Sunrise

18:55

Sunset

12 hours 13 minutes of sunlight today

Moon

Waxing Crescent

12:42

Moonrise

20:56

Moonset

Daily Forecast

Today

17°
22°

Thursday

10°
18°

Friday

10°
20°

Saturday

17°

Sunday

18°

Monday

20°

Tuesday

21°

Wednesday

21°

Thursday

10°
24°

Friday

13°
23°

Air Quality Data Available

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UV Index

No protection needed
1 Low
Low Extreme

Humidity

72% Humid
Low High

Weather in Sycamore today, September 16, 2026

Cloud cover dominates in Sycamore 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 09:00. Outdoor plans early on should not rely on bright skies.

The temperature range runs from about 17°C up to 22°C. The air stays humid, with relative humidity between 69% and 88% and the peak around 18:00. Expect gentle winds, highest near 09:00 at 4.0 km/h.

Expect persistent cloud later on, with amounts around 100% by 12:00. Sunshine remains the exception, not the rule. Visibility stays generally good near 14.9 km on average, though it can drop toward 6.7 km in thicker cloud or showers. Daylight runs from 06:42 to 18:55, lasting 12 hours 13 minutes of sunlight today.

Overall, Sycamore on September 16, 2026 stays grey and muted, so outdoor plans may want a flexible backup even with a high near 22°C.

Frequently asked questions about weather in Sycamore

How warm does it get in Sycamore?

The warmest month in Sycamore is July, with average high temperatures of 28°C. The average temperature during this period is around 24°C.

How cold does it get in Sycamore?

The coldest month in Sycamore is January, with average low temperatures of -8°C. The average temperature during this period is around -5°C.

What is the wettest time of year in Sycamore?

The wettest month in Sycamore is May, with an average of 130mm of precipitation.

What is the driest time of year in Sycamore?

The driest month in Sycamore is February, with an average of 49mm of precipitation.

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Metric (°C, km/h)