Cook County (Chicago)
Tomorrow
Tomorrow weather in Cook County
Sunday, June 21st, 2026
19°
Heavy rain
The weather tomorrow in Cook County will be much colder than today, with max temperatures up to 19°.
The rain will visit again tomorrow in Cook County and the expected precipitation are 32 mm.
The wind tomorrow will get stronger and reach 24 km/h.
19° / 15°
Temp
80%
Rain
24 km/h
Wind
81%
Humidity
Cook County Weather Pages
Cook County hourly forecast for tomorrow
Scroll right to see more weather forecasts for Cook County tomorrow
| 12:00 AM | 01:00 AM | 02:00 AM | 03:00 AM | 04:00 AM | 05:00 AM | 05:15 AM | 06:00 AM | 07:00 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 | 07:00 PM | 08:00 PM | 08:29 PM | 09:00 PM | 10:00 PM | 11:00 PM | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| weather |  | | | | | |  |  | | |  | | |  | |  |  | | | | | |  |  |  |  | Next |
| temperatures | 18.2° | 17.8° | 17.5° | 17.2° | 17° | 16.9° | Sunrise | 17.2° | 17.7° | 18.1° | 18.5° | 18.8° | 18.7° | 17.9° | 17.2° | 16.4° | 15.7° | 15.2° | 15° | 14.9° | 14.9° | 14.8° | Sunset | 14.8° | 14.7° | 14.8° | |
| wind speed | 6 km/h | 6 km/h | 7 km/h | 6 km/h | 5 km/h | 3 km/h | 4 km/h | 3 km/h | 8 km/h | 9 km/h | 10 km/h | 10 km/h | 8 km/h | 7 km/h | 11 km/h | 14 km/h | 20 km/h | 20 km/h | 20 km/h | 20 km/h | 22 km/h | 25 km/h | 25 km/h | 25 km/h | |||
| wind degree | 281° | 305° | 292° | 314° | 306° | 305° | 48° | 59° | 68° | 81° | 93° | 115° | 126° | 130° | 134° | 124° | 106° | 99° | 92° | 85° | 76° | 72° | 64° | 57° | |||
| wind direction | W | NW | WNW | NW | NW | NW | NE | ENE | ENE | E | E | ESE | SE | SE | SE | SE | ESE | E | E | E | ENE | ENE | ENE | ENE | |||
| 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 | 0.3 mm | 1.2 mm | 3.3 mm | 5 mm | 2.7 mm | 5.4 mm | 7.5 mm | 4.3 mm | 2.4 mm | 0.3 mm | 0.1 mm | 0 mm | |||
| chance for rain | 5% | 5% | 6% | 6% | 7% | 7% | 7% | 7% | 7% | 9% | 7% | 8% | 36% | 63% | 78% | 89% | 84% | 91% | 92% | 90% | 85% | 62% | 37% | 32% | |||
| 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 | 65% | 67% | 69% | 71% | 73% | 74% | 74% | 71% | 68% | 67% | 66% | 65% | 69% | 85% | 91% | 94% | 95% | 95% | 96% | 97% | 96% | 96% | 95% | 94% | |||
| dew point | 11.8° | 11.7° | 11.8° | 11.9° | 12° | 12° | 12.1° | 12.3° | 12.3° | 12.4° | 12.4° | 12.4° | 12.8° | 14.7° | 15.2° | 14.7° | 14.1° | 14° | 14.2° | 14.4° | 14.3° | 14.1° | 13.9° | 13.8° | |||
| 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 | 5 km | 9 km | 8 km | 7 km | 7 km | 7 km | 7 km | 7 km | 9 km | 2 km | 10 km | 10 km | |||
| cloud cover | 12% | 8% | 6% | 3% | 5% | 5% | 8% | 12% | 23% | 50% | 33% | 48% | 70% | 63% | 58% | 90% | 90% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | |||
| UV | 0 | 0 | 0 | 0 | 0 | 0 | 0.1 | 0.5 | 1.1 | 2 | 2.7 | 2.4 | 2.9 | 3.3 | 2.2 | 1 | 0.7 | 0.4 | 0.2 | 0.1 | 0 | 0 | 0 | 0 |
Weather in Cook County tomorrow
The weather in Cook County tomorrow is expected to be much cooler than usual, with a forecast temperature of 19 °F, compared to an average of 27.8 °F for June 21st in recent years.
temperatures
19 °F
rain
32.4 mm
wind
24 km/h
UV
Moderate
Cook County Tomorrow Weather Indexes for Outdoor Activities & Health
Weather indexes for tomorrow: outdoor activities, pollen allergies, air quality (AQI), UV index and health in Cook County - Sunday, June 21st, 2026
UV Sun Exposure Risk
Very High
9 / 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
0 / 10
Outdoor Activity Index
Excellent
10 / 10
Running & Jogging Index
Excellent
9 / 10
Cycling Weather Index
Excellent
10 / 10
Pet Walking Index
Excellent
10 / 10
Fishing Conditions Index
Excellent
10 / 10
Gardening Weather Index
Excellent
10 / 10
Photography Light Index
Excellent
10 / 10
Driving & Road Safety
Excellent
10 / 10
Construction Work Index
Excellent
10 / 10
Cook County daylight overview ☀️
Tomorrow in Cook County, The sun rises at 05:15 and sets at 20:29, giving a total daylight duration of 15 hours and 14 minutes.
Top locations in Cook County
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More Cook County weather pages
What to wear tomorrow in Cook County? clothing recommendations
Stay comfortably stylish - your tailored guide for tomorrow's Cook County forecast.
Long-sleeve shirt
Long pant
Closed-toe shoes
Light jacket
Umbrella
The weather tomorrow in Cook County - FAQ
What is the maximum temperature for tomorrow in Cook County?
The maximum temperature for tomorrow in Cook County is expected to be 19° degrees. Please dress accordingly to stay comfortable throughout the day.
Will it rain tomorrow in Cook County? 🌧️
Yes, there is a 80% chance of rain in Cook County tomorrow. We recommend carrying an umbrella or rain gear to stay dry.
What will be the wind speed tomorrow in Cook County? 🌀
The wind in Cook County is expected to blow at 24 km/h. This could affect outdoor activities, so plan accordingly.
How should I dress for the weather in Cook County tomorrow?
Given the forecast of 19 °F with a 80% 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 Cook County tomorrow.
What is the sunrise and sunset time for Cook County tomorrow?
The sun is expected to rise at 05:15 and set at 20:29 in Cook County.
How accurate is the weather forecast Cook County tomorrow? ✅
Cook County 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 Cook County?Get accurate weather forecasts for Cook County, located at latitude 41.85 and longitude -87.65. Stay updated with localized weather information tailored for Cook County.
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