Sterling

Petersburg Borough, Illinois, United States

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Current Weather

19°

Overcast

Feels Like: 12°

Min: 17°

Max: 21°

The next few hours will be overcast, with today reaching 21°C and dropping to 12°C. The coming days will be mostly clear throughout the day.

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Hourly Forecast

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Today
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Daylight Hours

06:46

Sunrise

18:59

Sunset

12 hours 12 minutes of sunlight today

Moon

Waxing Crescent

12:45

Moonrise

21:01

Moonset

Daily Forecast

Today

17°
21°

Thursday

11°
18°

Friday

11°
19°

Saturday

17°

Sunday

17°

Monday

19°

Tuesday

20°

Wednesday

21°

Thursday

10°
25°

Friday

14°
24°

Air Quality Data Available

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UV Index

No protection needed
1 Low
Low Extreme

Humidity

78% Humid
Low High

Weather in Sterling today, September 16, 2026

Cloud cover dominates in Sterling on September 16, 2026, keeping sunshine limited. Expect a grey, overcast feel rather than long bright spells. The morning sky stays heavily clouded, with cover near 100% around 08:00. Grey conditions set the early tone before any later change.

The day peaks near 21°C and cools toward 17°C. Relative humidity sits between 77% and 91%, reaching its peak around 23:00. A lighter breeze peaks around 08:00 near 4.4 km/h.

Afternoon skies stay clogged, peaking close to 100% near 12:00. The grey theme continues rather than clearing out. Visibility holds near 13.0 km, though it can fall to 1.9 km. Daylight runs from 06:46 to 18:59, lasting 12 hours 12 minutes of sunlight today.

The practical takeaway for Sterling on September 16, 2026 is a cloudy day that stays usable, just not particularly bright, around 21°C.

Frequently asked questions about weather in Sterling

How warm does it get in Sterling?

The warmest month in Sterling is July, with average high temperatures of 29°C. The average temperature during this period is around 24°C.

How cold does it get in Sterling?

The coldest month in Sterling is January, with average low temperatures of -8°C. The average temperature during this period is around -4°C.

What is the wettest time of year in Sterling?

The wettest month in Sterling is May, with an average of 123mm of precipitation.

What is the driest time of year in Sterling?

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

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Metric (°C, km/h)