Cook County (Chicago)
Today
Today weather in Cook County
Monday, July 20th, 2026
34°
Smoky haze
Low 18°
Official weather alert: Dense Smoke Advisory. Today, Cook County is set to face a notably hot day, with temperatures spiking up to 34 °C and offering slight relief at 17 °C by night. It'll be quite breezy in Cook County Today with average wind speeds of 18 km/h. Intermittent light showers are likely, with about 0.78 mm expected.
34° / 18°
Temp
36%
Rain
18 km/h
Wind
69%
Humidity
Cook County Weather Pages
Cook County hourly forecast for today
Scroll right to see more weather forecasts for Cook County today
| 00:00 | 01:00 | 02:00 | 03:00 | 04:00 | 05:00 | 05:33 | 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 | 20:20 | 21:00 | 22:00 | 23:00 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| weather |  |  | | | | |  | | | |  | | | | |  | | | | |  | |  |  | | | Next |
| temperatures | 20° | 19.3° | 19° | 18.8° | 18.5° | 18° | Sunrise | 17.7° | 19.1° | 20.8° | 21.7° | 24.3° | 29.6° | 31.9° | 33.4° | 34.1° | 33.4° | 32.4° | 32.1° | 27.5° | 26.8° | 25° | Sunset | 23.7° | 22.3° | 22.3° | |
| feels like | 20° | 19.3° | 19° | 18.8° | 18.5° | 18° | 17.7° | 19.1° | 20.8° | 22.7° | 26° | 31.5° | 33.6° | 34.8° | 35.4° | 34.1° | 32.7° | 32.6° | 28.7° | 28.2° | 26.7° | 25.7° | 24.7° | 24.8° | |||
| wind speed | 6 km/h | 6 km/h | 7 km/h | 7 km/h | 7 km/h | 8 km/h | 8 km/h | 8 km/h | 10 km/h | 10 km/h | 10 km/h | 10 km/h | 12 km/h | 13 km/h | 12 km/h | 16 km/h | 16 km/h | 16 km/h | 18 km/h | 19 km/h | 15 km/h | 13 km/h | 15 km/h | 18 km/h | |||
| wind degree | 118° | 161° | 184° | 190° | 185° | 203° | 217° | 198° | 196° | 211° | 218° | 212° | 209° | 222° | 222° | 216° | 220° | 213° | 217° | 222° | 223° | 210° | 207° | 211° | |||
| wind direction | ESE | SSE | S | S | S | SSW | SW | SSW | SSW | SSW | SW | SSW | SSW | SW | SW | SW | SW | SSW | SW | SW | SW | 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 | 0.1 mm | 0.2 mm | 0.2 mm | 0.2 mm | |||
| chance for rain | 7% | 9% | 10% | 11% | 12% | 13% | 14% | 14% | 12% | 10% | 6% | 2% | 1% | 1% | 1% | 1% | 1% | 1% | 3% | 10% | 23% | 34% | 41% | 46% | |||
| 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 | 73% | 80% | 82% | 86% | 87% | 89% | 91% | 91% | 88% | 73% | 71% | 54% | 45% | 39% | 36% | 35% | 36% | 38% | 56% | 62% | 73% | 83% | 92% | 93% | |||
| dew point | 15.1° | 15.8° | 15.8° | 16.4° | 16.3° | 16.2° | 16.2° | 17.6° | 18.7° | 19.3° | 18.8° | 19.4° | 18.4° | 17.4° | 17° | 16.1° | 15.3° | 15.8° | 18° | 18.9° | 19.9° | 20.7° | 20.9° | 21.2° | |||
| visibility | 10 km | 7 km | 6.5 km | 5.5 km | 5.2 km | 4.5 km | 4 km | 4.2 km | 5.6 km | 9.7 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 | 9 km | 9 km | |||
| cloud cover | 0% | 0% | 0% | 0% | 0% | 1% | 3% | 1% | 0% | 75% | 4% | 2% | 1% | 1% | 0% | 0% | 0% | 0% | 16% | 54% | 70% | 86% | 73% | 87% | |||
| UV | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.3 | 1 | 2.2 | 3.9 | 5.3 | 6.5 | 6.4 | 5.9 | 5 | 3.6 | 2 | 0.8 | 0.2 | 0 | 0 | 0 | 0 |
View of Cook County today
Explore Cook County live webcam feed to see how the weather is shaping up today in Cook County. See what people are wearing, check out the sky, and get a sense of the atmosphere before you step outside.
Stay informed and make the most of your day with our live weather updates from Cook County today.
Weather in Cook County today
The weather in Cook County today is expected to be much warmer than usual, with a forecast temperature of 34 °C, compared to an average of 26.8 °C for July 20th in recent years.
temperatures
34 °C
rain
0.8 mm
wind
18 km/h
UV
High
Cook County Today Weather Indexes for Outdoor Activities & Health
Live indexes for outdoor activities, pollen allergies, air quality (AQI), UV index and health in Cook County - Monday, July 20th, 2026
UV Sun Exposure Risk
High
7 / 11+
Air Quality Index (AQI)
Excellent
8 / 10
Pollen Allergy Risk
Very High
10 / 10
Asthma Risk Index
Moderate
5 / 10
Arthritis Pain Index
Low
3 / 10
Outdoor Activity Index
Excellent
9 / 10
Running & Jogging Index
Good
7 / 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
Good
7 / 10
Driving & Road Safety
Excellent
9 / 10
Construction Work Index
Excellent
10 / 10
Cook County daylight overview ☀️
Today in Cook County, The sun rises at 05:33 and sets at 20:20, giving a total daylight duration of 14 hours and 47 minutes.
Top locations in Cook County
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More Locations Quick links
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What to wear today in Cook County? clothing recommendations
Stay comfortably stylish - your tailored guide for today's Cook County forecast.
Short-sleeve shirt
Shorts
Lightweight trousers
Breathable footwear
Sunglasses
Wide brimmed hat
Sunscreen
Flip flop
The weather today in Cook County - FAQ
What is the maximum temperature for today in Cook County?
The maximum temperature for today in Cook County is expected to be 34° degrees. Please dress accordingly to stay comfortable throughout the day.
Will it rain today in Cook County? 🌧️
Yes, there is a 36% chance of rain in Cook County today. We recommend carrying an umbrella or rain gear to stay dry.
What will be the wind speed today in Cook County? 🌀
The wind in Cook County is expected to blow at 18 km/h. This could affect outdoor activities, so plan accordingly.
How should I dress for the weather in Cook County today?
Given the forecast of 34 °C with a 36% chance of rain, we advise checking our "What to wear today" section for recommendations. There, you will find tailored advice to help you stay comfortable and prepared for the weather conditions in Cook County today.
What is the sunrise and sunset time for Cook County today?
The sun is expected to rise at 05:33 and set at 20:20 in Cook County.
How accurate is the weather forecast Cook County today? ✅
Cook County weather forecast for today 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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