Illinois (Chicago)
Tomorrow
Tomorrow weather in Illinois
Sunday, October 18th, 2026
18°
Sunny
Feels like 12° · Low 8°
The weather tomorrow in Illinois will be hotter than today, with temperatures rising to 17°.
18° / 8°
Temp
1%
Rain
18 km/h
Wind
37%
Humidity
Illinois Tomorrow's Weather Forecast
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Illinois Weather Pages
Illinois hourly forecast for tomorrow
Scroll right to see more weather forecasts for Illinois tomorrow
| 12:00 AM | 01:00 AM | 02:00 AM | 03:00 AM | 04:00 AM | 05:00 AM | 06:00 AM | 07:00 AM | 07:06 AM | 08:00 AM | 09:00 AM | 10:00 AM | 11:00 AM | 12:00 PM | 01:00 PM | 02:00 PM | 03:00 PM | 04:00 PM | 05:00 PM | 06:00 PM | 06:04 PM | 07:00 PM | 08:00 PM | 09:00 PM | 10:00 PM | 11:00 PM | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| weather |  | | | | | | | |  | | | | | | | | | | | |  | | | | | | Next |
| temperatures | 9.9° | 9.7° | 9.4° | 9.1° | 8.9° | 8.8° | 8.6° | 8.3° | Sunrise | 8.6° | 10° | 12° | 13.8° | 15.3° | 16.4° | 17.2° | 17.6° | 17.5° | 17.1° | 15.7° | Sunset | 14.8° | 14.1° | 13.6° | 13° | 12.5° | |
| Feels like | 8° | 7.9° | 7.6° | 7.3° | 7° | 6.8° | 6.5° | 6.2° | 6.5° | 7.2° | 7.9° | 8.2° | 9.3° | 10.3° | 11.1° | 11.6° | 11.6° | 11.8° | 11° | 10.5° | 9.9° | 9.8° | 9.6° | 9.5° | |||
| wind speed | 10 km/h | 10 km/h | 11 km/h | 11 km/h | 12 km/h | 12 km/h | 12 km/h | 13 km/h | 13 km/h | 16 km/h | 17 km/h | 18 km/h | 18 km/h | 19 km/h | 18 km/h | 18 km/h | 17 km/h | 14 km/h | 13 km/h | 11 km/h | 10 km/h | 9 km/h | 9 km/h | 9 km/h | |||
| wind degree | 210° | 205° | 201° | 201° | 202° | 203° | 203° | 203° | 202° | 207° | 208° | 208° | 209° | 209° | 209° | 210° | 208° | 203° | 199° | 196° | 190° | 194° | 195° | 198° | |||
| wind direction | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | S | SSW | SSW | SSW | |||
| Precipitation | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | |||
| chance for rain | 1% | 1% | 2% | 2% | 2% | 3% | 3% | 3% | 2% | 1% | 1% | 1% | 0% | 0% | 0% | 0% | 0% | 0% | 1% | 1% | 1% | 1% | 1% | 1% | |||
| chance for snow | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | |||
| humidity | 41% | 45% | 48% | 50% | 52% | 54% | 54% | 53% | 48% | 41% | 36% | 31% | 28% | 25% | 23% | 22% | 23% | 25% | 28% | 31% | 33% | 34% | 36% | 37% | |||
| dew point | -2.6° | -1.6° | -1° | -0.7° | -0.2° | -0.1° | -0.1° | -0.7° | -1.7° | -2.5° | -2.6° | -2.9° | -3.3° | -3.8° | -4.1° | -4.1° | -4° | -3.3° | -2.6° | -1.9° | -1.9° | -1.7° | -1.7° | -1.6° | |||
| visibility | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | |||
| cloud cover | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | |||
| UV | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.1 | 0.6 | 1.6 | 2.9 | 3.8 | 4.1 | 3.6 | 2.5 | 1.3 | 0.4 | 0 | 0 | 0 | 0 | 0 | 0 |
Weather in Illinois tomorrow
The temperature tomorrow in Illinois is expected to be typical for this time of year, with a forecast of 18 °F, closely aligning with the historical average for October 18th.
temperatures
18 °F
rain
0 mm
wind
18 km/h
UV
Moderate
Illinois Tomorrow Weather Indexes for Outdoor Activities & Health
Weather indexes for tomorrow: outdoor activities, pollen allergies, air quality (AQI), UV index and health in Illinois - Sunday, October 18th, 2026
UV Sun Exposure Risk
Moderate
4 / 11+
Air Quality Index (AQI)
Excellent
10 / 10
Pollen Allergy Risk
Very High
10 / 10
Asthma Risk Index
Low
3 / 10
Arthritis Pain Index
Very Low
1 / 10
Outdoor Activity Index
Excellent
9 / 10
Running & Jogging Index
Excellent
10 / 10
Cycling Weather Index
Excellent
9 / 10
Pet Walking Index
Excellent
10 / 10
Fishing Conditions Index
Excellent
10 / 10
Gardening Weather Index
Excellent
10 / 10
Photography Light Index
Excellent
9 / 10
Driving & Road Safety
Excellent
9 / 10
Construction Work Index
Excellent
10 / 10
Illinois daylight overview ☀️
Tomorrow in Illinois, The sun rises at 07:06 and sets at 18:04, giving a total daylight duration of 10 hours and 58 minutes.
Counties in Illinois
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Top locations in Illinois
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What to wear tomorrow in Illinois? clothing recommendations
Stay comfortably stylish - your tailored guide for tomorrow's Illinois forecast.
Long-sleeve shirt
Long pant
Closed-toe shoes
Light jacket
The weather tomorrow in Illinois - FAQ
What is the maximum temperature for tomorrow in Illinois?
The maximum temperature for tomorrow in Illinois is expected to be 18° degrees. Please dress accordingly to stay comfortable throughout the day.
Will it rain tomorrow in Illinois? 🌧️
Yes, there is a 1% chance of rain in Illinois tomorrow. We recommend carrying an umbrella or rain gear to stay dry.
What will be the wind speed tomorrow in Illinois? 🌀
The wind in Illinois is expected to blow at 18 km/h. This could affect outdoor activities, so plan accordingly.
How should I dress for the weather in Illinois tomorrow?
Given the forecast of 18 °F with a 1% chance of rain, we advise checking our "What to wear tomorrow" section for recommendations. There, you will find tailored advice to help you stay comfortable and prepared for the weather conditions in Illinois tomorrow.
What is the sunrise and sunset time for Illinois tomorrow?
The sun is expected to rise at 07:06 and set at 18:04 in Illinois.
How accurate is the weather forecast Illinois tomorrow? ✅
Illinois weather forecast for tomorrow is based on the most current and sophisticated meteorological models available. While we strive for accuracy, weather conditions can change unexpectedly, so we recommend checking for updates regularly.
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Where is Illinois?Get accurate weather forecasts for Illinois, located at latitude 41.85 and longitude -87.65. Stay updated with localized weather information tailored for Illinois.
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