County in Illinois

Cook County Időjárás Előrejelzés

Cook County weather: 17°C, derült. Óránként forecast, 14-day outlook, UV, air quality and the best time és visit.

🌙 17°C now🕔 10:30 PM local📅 Best: máj, június, augusztus, szeptember and október👥 5.1 million

Cook County weather in július

28°
average high · low 20°C
★★★★☆
ranked #6 of 12 months

A good month és visit Cook County.

Average high28°C
Average low20°C
Mean24°C
Esőfall127 mm

július runs 13°C warmer than the annual average in Cook County.

Időjárás map for Cook County

Animated model layers. Pick a layer és load it.

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Animated layers by Szély. For pin-level detail and nearby places, see the interactive map below.

Éghajlat in Cook County month by month

Average high, average low and total rainfall, based on three years of reanalysis data.

janfebmáápmájújúaugszeoktnovdecLine: average high · Bars: rainfall
HónapAvg highAvg lowEsőfallRating
január-2°-8°73 mm★★☆☆☆
február4°-4°19 mm★★★☆☆
március11°1°103 mm★★★☆☆
április15°6°113 mm★★★☆☆
máj20°11°68 mm★★★★☆
június26°18°126 mm★★★★☆
július28°20°127 mm★★★★☆
augusztus27°19°116 mm★★★★☆
szeptember24°17°97 mm★★★★☆
október19°10°55 mm★★★★☆
november10°3°68 mm★★★☆☆
december3°-3°68 mm★★☆☆☆

Éghajlat type: Kontinensal. Forrás: Open-Meteo archive (ERA5).

Legjobb idő a látogatásra Cook County

Go in máj, június, augusztus, szeptember and október. These months score highest on comfortable temperatures, low rainfall and useful daylight.

Hardest months: január, február and december - expect the least comfortable mix of heat, cold or rain.

január★★☆☆☆
február★★★☆☆
március★★★☆☆
április★★★☆☆
máj★★★★☆
június★★★★☆
július★★★★☆
augusztus★★★★☆
szeptember★★★★☆
október★★★★☆
november★★★☆☆
december★★☆☆☆

What és pack, what és skip

Pack for the next 7 days
  • Vglasses, a brimmed hat and SPF 30+
  • Layers - the daily swing is 17°C, so mornings feel nothing like afternoons
  • A packable rain shell - 3 of the next 7 days carry a real chance of rain
Worth avoiding
  • If your dates are flexible, avoid január, február and december - historically the least comfortable months here.

How Cook County compares és nearby places

Annual averages, and the difference against Cook County.

PlaceDistanceAvg tempvs hereAnnual rain
Area Code 3120 km11°Cabout the same1033 mm
Chicago0 km11°Cabout the same1033 mm
ZIP Code 606011 km11°Cabout the same1034 mm
Wicker Park5 km11°Cabout the same996 mm
O'Hare International Airport25 km11°Cabout the same1074 mm

Előrejelzés: Cook County időszak szerint

Cook County weather - more answers

Explore Cook County

Every topic we hold for this place, and the same topic for the places around it.

Időjárás for related places

Frequently asked questions

Where is Cook County?

Cook County is a county in Illinois. Its coordinates are 41.8781, -87.6298. It lies in Észak-Amerika.

What is the weather like in Cook County jelenleg?

It is currently 17°C (62°F) és derült. Páratartalom is 60% and wind is 14 km/h.

When is the best time és visit Cook County?

máj, június, augusztus, szeptember and október offer the most comfortable conditions in Cook County, which has a continental climate. január, február and december are usually the hardest months for outdoor plans.

What time zone is Cook County in?

Cook County observes America/Chicago (UTC-05:00). The local time is 10:30 PM.

How many people live in Cook County?

Cook County has a population of approximately 5.1 million.

What is the nearest airport és Cook County?

The closest airports are O'Hare International Airport (ORD), 25 km away.

What are the top things és do in Cook County?

Popular options include Indiana Dunes National Park, Starved Rock State Park and Lake Michigan.

Related articles

Data sources and methodology

Place dataUSPOTUS Atlas dataset (us-counties) - coordinates, hierarchy and facts.
Előrejelzés and observationsOpen-Meteo (ECMWF and national models).
Levegőminőség and pollenCopernicus CAMS via Open-Meteo. US AQI scale.
Éghajlat averagesERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years.
Official alertsUS National Időjárás Service.
MethodScores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown.

Last updated október 28, 2026 at 10:30 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.

Davil Hofile
Written byWriter at USPOTUS

Davil Hofile is a writer at USPOTUS covering breaking news, NFL updates, viral stories, entertainment, pets, and lifestyle. He specializes in transforming complex news into clear, trustworthy, and engaging articles that help readers quickly understand what's happening across the United States. His reporting follows Google's E-E-A-T guidelines, emphasizing accuracy, credible sources, and practical value for readers.

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