Cook County (Chicago)
Today
Today weather in Cook County
Saturday, March 21st, 2026
19°
Partly cloudy
Mild temperatures are expected in Cook County Today, peaking at around 18 °F and dropping to 2 °F by night. It'll be quite breezy in Cook County Today with average wind speeds of 22 km/h. Expect a humid atmosphere, with levels hovering around 83%.
19° / 2°
Temp
0%
Rain
22 km/h
Wind
83%
Humidity
Cook County Weather Pages
Cook County hourly forecast for today
Scroll right to see more weather forecasts for Cook County today
| 12:00 AM | 01:00 AM | 02:00 AM | 03:00 AM | 04:00 AM | 05:00 AM | 06:00 AM | 06:52 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 | 07:04 PM | 08:00 PM | 09:00 PM | 10:00 PM | 11:00 PM | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| weather |  | | |  | | |  |  |  | | |  | | | | |  | | | | |  |  | | | | Next |
| temperatures | 4.3° | 3.9° | 3.7° | 3.7° | 3.7° | 3.1° | 2.8° | Sunrise | 2.6° | 2.6° | 2.5° | 3.1° | 4.2° | 6.1° | 8.4° | 11° | 13.7° | 16.2° | 16.2° | 15.8° | 15.2° | Sunset | 14.7° | 14.3° | 15.1° | 14.1° | |
| feels like | 1.9° | 1.5° | 1.6° | 1.8° | 1.9° | 0.7° | 0.1° | -0.2° | -0.4° | -0.4° | 0.3° | 1.6° | 3.8° | 6.4° | 9.4° | 12.9° | 15.8° | 16° | 15.7° | 14.7° | 13.8° | 12.9° | 14.4° | 12.8° | |||
| wind speed | 13 km/h | 12 km/h | 11 km/h | 10 km/h | 8 km/h | 7 km/h | 7 km/h | 7 km/h | 8 km/h | 7 km/h | 7 km/h | 10 km/h | 12 km/h | 16 km/h | 19 km/h | 21 km/h | 22 km/h | 23 km/h | 23 km/h | 22 km/h | 20 km/h | 19 km/h | 18 km/h | 15 km/h | |||
| wind degree | 45° | 48° | 46° | 52° | 81° | 86° | 89° | 110° | 141° | 163° | 164° | 168° | 187° | 197° | 206° | 213° | 219° | 230° | 235° | 234° | 231° | 231° | 233° | 234° | |||
| wind direction | NE | NE | NE | NE | E | E | E | ESE | SE | SSE | SSE | SSE | S | SSW | SSW | SSW | SW | SW | SW | SW | SW | SW | SW | SW | |||
| 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 | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | |||
| 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 | 90% | 93% | 93% | 94% | 96% | 97% | 94% | 94% | 93% | 93% | 94% | 94% | 93% | 85% | 78% | 72% | 67% | 64% | 64% | 67% | 70% | 71% | 73% | 68% | |||
| dew point | 2.5° | 2.7° | 2.5° | 2.8° | 3° | 3.3° | 1.7° | 1.5° | 1.5° | 1.4° | 1.7° | 2.7° | 4.2° | 5.6° | 7.2° | 8.6° | 10.3° | 11.8° | 9.5° | 9.3° | 9.2° | 9.1° | 9.1° | 9.9° | |||
| 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 | 5% | 7% | 8% | 12% | 36% | 84% | 90% | 79% | 42% | 56% | 67% | 67% | 67% | 49% | 26% | 11% | 3% | 1% | 33% | 60% | 31% | 16% | 1% | 98% | |||
| UV | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.4 | 1.2 | 2.6 | 4 | 5.2 | 5.5 | 5 | 3.7 | 2.2 | 0.9 | 0.2 | 0 | 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 19 °F, compared to an average of 9.4 °F for March 21st in recent years.
temperatures
19 °F
rain
0 mm
wind
22 km/h
UV
Low
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 - Saturday, March 21st, 2026
UV Sun Exposure Risk
Very Low
1 / 11+
Air Quality Index (AQI)
Excellent
8 / 10
Pollen Allergy Risk
Very Low
2 / 10
Asthma Risk Index
Very Low
1 / 10
Arthritis Pain Index
Low
3 / 10
Outdoor Activity Index
Good
7 / 10
Running & Jogging Index
Excellent
10 / 10
Cycling Weather Index
Excellent
9 / 10
Pet Walking Index
Excellent
9 / 10
Fishing Conditions Index
Excellent
9 / 10
Gardening Weather Index
Excellent
8 / 10
Photography Light Index
Good
6 / 10
Driving & Road Safety
Excellent
10 / 10
Construction Work Index
Excellent
10 / 10
Cook County daylight overview ☀️
Today in Cook County, The sun rises at 06:52 and sets at 19:04, giving a total daylight duration of 12 hours and 12 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 today in Cook County? clothing recommendations
Stay comfortably stylish - your tailored guide for today's Cook County forecast.
Long-sleeve shirt
Long pant
Closed-toe shoes
Light jacket
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 19° degrees. Please dress accordingly to stay comfortable throughout the day.
Will it rain today in Cook County? 🌧️
No, there is no significant chance of rain in Cook County today. It should be a dry day.
What will be the wind speed today in Cook County? 🌀
The wind in Cook County is expected to blow at 22 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 19 °F with a 0% 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 06:52 and set at 19:04 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.
You are here
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.
Found a mistake?
We appreciate your attention to details. Tell us here.