Cook County (Chicago)
Tomorrow
Tomorrow weather in Cook County
Tuesday, July 21st, 2026
30°
Sunny
Low 20°
The weather tomorrow in Cook County will be much colder than today, with max temperatures up to 29°.
The rain will visit again tomorrow in Cook County and the expected precipitation are 2 mm.
The wind tomorrow will get stronger and reach 29 km/h.
30° / 20°
Temp
57%
Rain
29 km/h
Wind
69%
Humidity
Cook County Weather Pages
Cook County hourly forecast for tomorrow
Scroll right to see more weather forecasts for Cook County tomorrow
| 00:00 | 01:00 | 02:00 | 03:00 | 04:00 | 05:00 | 05:34 | 06:00 | 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | 20:00 | 20:19 | 21:00 | 22:00 | 23:00 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| weather |  | | |  |  | |  |  |  | | | | | | | | | | | | |  |  | | | | Next |
| temperatures | 22.2° | 22.2° | 22.3° | 22.3° | 22.5° | 22.4° | Sunrise | 22.6° | 23.5° | 24.6° | 26.4° | 27.6° | 28.2° | 28.7° | 29.2° | 29.4° | 29.5° | 29.4° | 28.3° | 26.5° | 24.9° | 23.6° | Sunset | 22.6° | 21.5° | 20.4° | |
| feels like | 24.7° | 24.7° | 24.8° | 24.8° | 25° | 24.9° | 25.1° | 25.9° | 26.9° | 27.7° | 28.3° | 28.9° | 29.5° | 30.1° | 30.3° | 30.3° | 30.1° | 28.9° | 27.2° | 25.9° | 25.2° | 24.8° | 21.5° | 20.4° | |||
| wind speed | 18 km/h | 19 km/h | 21 km/h | 23 km/h | 22 km/h | 20 km/h | 21 km/h | 19 km/h | 20 km/h | 21 km/h | 22 km/h | 20 km/h | 18 km/h | 19 km/h | 21 km/h | 21 km/h | 23 km/h | 27 km/h | 30 km/h | 27 km/h | 25 km/h | 26 km/h | 25 km/h | 25 km/h | |||
| wind degree | 218° | 223° | 223° | 224° | 227° | 230° | 232° | 267° | 300° | 305° | 311° | 316° | 313° | 312° | 315° | 313° | 314° | 324° | 329° | 325° | 333° | 344° | 342° | 345° | |||
| wind direction | SW | SW | SW | SW | SW | SW | SW | W | WNW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NNW | NW | NNW | NNW | NNW | NNW | |||
| Precipitation | 0.5 mm | 0.4 mm | 0.5 mm | 1.2 mm | 0.1 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 | 61% | 55% | 60% | 68% | 34% | 29% | 29% | 21% | 11% | 4% | 2% | 2% | 2% | 2% | 2% | 4% | 4% | 4% | 5% | 2% | 10% | 12% | 11% | 11% | |||
| 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 | 94% | 95% | 95% | 96% | 96% | 97% | 97% | 94% | 86% | 62% | 51% | 49% | 49% | 49% | 48% | 47% | 46% | 48% | 51% | 52% | 58% | 61% | 64% | 67% | |||
| dew point | 21.3° | 21.4° | 21.5° | 21.6° | 21.8° | 21.8° | 22.1° | 22.6° | 22.1° | 18.5° | 16.5° | 16.5° | 16.9° | 17.3° | 17.2° | 16.9° | 16.6° | 16.2° | 15.5° | 14.3° | 14.8° | 14.8° | 14.3° | 14.1° | |||
| visibility | 9 km | 9 km | 9 km | 9 km | 9 km | 9 km | 9 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 | 88% | 71% | 75% | 58% | 68% | 80% | 80% | 48% | 3% | 0% | 0% | 1% | 6% | 6% | 18% | 45% | 43% | 44% | 48% | 6% | 70% | 71% | 70% | 53% | |||
| UV | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.4 | 1.3 | 2.8 | 4.7 | 6.7 | 8.1 | 8.6 | 7.7 | 4.6 | 2.4 | 1.1 | 0.4 | 0.2 | 0 | 0 | 0 | 0 |
Weather in Cook County tomorrow
The weather in Cook County tomorrow is expected to be noticeably warmer than usual, with a forecast temperature of 30 °C, compared to an average of 25.6 °C for July 21st in recent years.
temperatures
30 °C
rain
2.9 mm
wind
29 km/h
UV
Very High
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 - Tuesday, July 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
1 / 10
Outdoor Activity Index
Excellent
8 / 10
Running & Jogging Index
Good
7 / 10
Cycling Weather Index
Good
7 / 10
Pet Walking Index
Excellent
8 / 10
Fishing Conditions Index
Excellent
9 / 10
Gardening Weather Index
Excellent
8 / 10
Photography Light Index
Excellent
8 / 10
Driving & Road Safety
Excellent
9 / 10
Construction Work Index
Good
7 / 10
Cook County daylight overview ☀️
Tomorrow in Cook County, The sun rises at 05:34 and sets at 20:19, giving a total daylight duration of 14 hours and 45 minutes.
Top locations in Cook County
Select a location for an accurate weather forecast
More Locations Quick links
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.
Short-sleeve shirt
Shorts
Lightweight trousers
Sunglasses
Wide brimmed hat
Sunscreen
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 30° degrees. Please dress accordingly to stay comfortable throughout the day.
Will it rain tomorrow in Cook County? 🌧️
Yes, there is a 57% 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 29 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 30 °C with a 57% 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 05:34 and set at 20:19 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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