Bartlett

Platte County, Illinois, United States

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Current Weather

19°

Breezy and Overcast

Feels Like: 19°

Min: 19°

Max: 25°

The next few hours will be possible rain, with today reaching 25°C and dropping to 17°C. The coming days will be mostly cloudy throughout the day.

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Hourly Forecast

19° 19° 20° 20° 19° 20° 20° 21° 22° 23° 24° 25° 25° 24° 25° 25° 24° 22° 21° 21° 20° 19° 19° 18°
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Today
Tomorrow

Daylight Hours

06:39

Sunrise

18:55

Sunset

12 hours 15 minutes of sunlight today

Moon

Waxing Crescent

11:35

Moonrise

20:24

Moonset

Daily Forecast

Today

19°
25°

Wednesday

17°
22°

Thursday

19°
25°

Friday

18°
24°

Saturday

18°
26°

Sunday

16°
22°

Monday

14°
21°

Tuesday

12°
21°

Wednesday

13°
19°

Thursday

15°
18°

Air Quality Data Available

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UV Index

No protection needed
0 Low
Low Extreme

Humidity

63% Comfortable
Low High

Weather in Bartlett today, September 15, 2026

Bartlett stays under cloudy skies on September 15, 2026, with only brief brighter breaks. Plan for a day that feels grey more often than open. Expect a grey start, with morning cloud around 100% by 03:00. Outdoor plans early on should not rely on bright skies.

The temperature range runs from about 19°C up to 25°C. Moisture in the air spans 63%-95%, with the highest values around 10:00. Expect gentle winds, highest near 03:00 at 7.7 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 13.9 km on average, though it can drop toward 1.6 km in thicker cloud or showers. Expect sunrise at 06:39, sunset at 18:55, and 12 hours 15 minutes of sunlight today overall.

The practical takeaway for Bartlett on September 15, 2026 is a cloudy day that stays usable, just not particularly bright, around 25°C.

Frequently asked questions about weather in Bartlett

How warm does it get in Bartlett?

The warmest month in Bartlett 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 Bartlett?

The coldest month in Bartlett is January, with average low temperatures of -7°C. The average temperature during this period is around -4°C.

What is the wettest time of year in Bartlett?

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

What is the driest time of year in Bartlett?

The driest month in Bartlett is February, with an average of 50mm of precipitation.

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Metric (°C, km/h)