Blue Island

Platte County, Illinois, United States

Unlock Minute-by-Minute Forecast

See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.

Current Weather

19°

Clear

Feels Like: 20°

Min: 11°

Max: 23°

The next few hours will be clear, with tomorrow reaching 31°C and dropping to 21°C. The coming days will be mostly cloudy throughout the day.

Does this forecast seem accurate?

Unlock Historical Data

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

Hourly Forecast

19° 19° 19° 19° 19° 19° 19° 19° 19° 20° 21° 22° 21° 22° 21° 22° 24° 31° 31° 30° 28° 26° 25° 24°
10pm
11pm
12am
1am
2am
3am
4am
5am
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
5pm
6pm
7pm
8pm
9pm
Today
Tomorrow

Daylight Hours

06:36

Sunrise

18:54

Sunset

12 hours 18 minutes of sunlight today

Moon

Waxing Crescent

10:24

Moonrise

19:58

Moonset

Daily Forecast

Monday

11°
23°

Today

19°
31°

Wednesday

20°
24°

Thursday

21°
27°

Friday

21°
26°

Saturday

21°
28°

Sunday

20°
25°

Monday

18°
23°

Tuesday

16°
22°

Wednesday

14°
19°

Air Quality Data Available

Upgrade to access real-time air quality data for Blue Island.

UV Index

No protection needed
0 Low
Low Extreme

Humidity

53% Comfortable
Low High

Weather in Blue Island tomorrow, September 15, 2026

Blue Island stays under cloudy skies on September 15, 2026, with only brief brighter breaks. Plan for a day that feels grey more often than open. The first half of the day looks overcast, as cloud amounts reach about 100% around 04:00. Brighter weather, if it comes, waits until later.

Expect highs of 31°C and cooler readings close to 19°C. Moisture in the air spans 57%-93%, with the highest values around 12:00. Expect gentle winds, highest near 04:00 at 6.4 km/h.

Through the afternoon cloud remains the main feature, with cover near 100% around 12:00. Bright spells should stay limited even as the day wears on. Horizontal visibility sits around 15.4 km, briefly nearer 5.4 km. Sunrise is at 06:37 and sunset at 18:53, giving 12 hours 15 minutes of sunlight today.

The practical takeaway for Blue Island on September 15, 2026 is a cloudy day that stays usable, just not particularly bright, around 31°C.

Frequently asked questions about weather in Blue Island

How warm does it get in Blue Island?

The warmest month in Blue Island is July, with average high temperatures of 28°C. The average temperature during this period is around 23°C.

How cold does it get in Blue Island?

The coldest month in Blue Island 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 Blue Island?

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

What is the driest time of year in Blue Island?

The driest month in Blue Island is February, with an average of 61mm of precipitation.

View full climate insights for Blue Island →

Airpult

Get accurate weather forecasts worldwide with real-time updates and severe weather alerts. Covering 6M+ locations with precise, reliable weather data.

© 2026 Samuenti GmbH. All rights reserved.

gb English
Metric (°C, km/h)