County in Illinois

Cook County Tiempo Pronóstico

Cook County weather: 14°C, mayormente despejado. Por hora forecast, 14-day outlook, UV, air quality and the best time a visit.

🌙 14°C now🕔 12:38 PM local📅 Best: may, junio, agosto, septiembre and octubre👥 5.1 million

Cook County weather in septiembre

24°
average high · low 17°C
★★★★☆
ranked #2 of 12 months

One of the best months a visit Cook County.

Average high24°C
Average low17°C
Mean20°C
Precipitaciones74 mm

septiembre runs 9°C warmer than the annual average in Cook County.

Tiempo map for Cook County

Animated model layers. Pick a layer a load it.

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

Clima in Cook County month by month

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

enefebmarabrmayjunjulagosepoctnovdicLine: average high · Bars: rainfall
MesMáx. mediaMín. mediaPrecipitacionesValoración
enero-2°-8°73 mm★★☆☆☆
febrero4°-4°19 mm★★★☆☆
marzo11°1°103 mm★★★☆☆
abril15°6°113 mm★★★☆☆
may20°11°68 mm★★★★☆
junio26°18°126 mm★★★★☆
julio28°20°127 mm★★★★☆
agosto27°19°116 mm★★★★☆
septiembre24°17°74 mm★★★★☆
octubre18°10°79 mm★★★★☆
noviembre10°3°68 mm★★★☆☆
diciembre3°-3°68 mm★★☆☆☆

Clima type: Continenteal. Fuente: Open-Meteo archive (ERA5).

Mejor época para visitar Cook County

Go in may, junio, agosto, septiembre and octubre. These months score highest on comfortable temperatures, low rainfall and useful daylight.

Hardest months: enero, febrero and diciembre – expect the least comfortable mix of heat, cold or rain.

enero★★☆☆☆
febrero★★★☆☆
marzo★★★☆☆
abril★★★☆☆
may★★★★☆
junio★★★★☆
julio★★★★☆
agosto★★★★☆
septiembre★★★★☆
octubre★★★★☆
noviembre★★★☆☆
diciembre★★☆☆☆

What a pack, what a skip

Pack for the next 7 days
  • Layers – the daily swing is 14°C, so mornings feel nothing like afternoons
Worth avoiding
  • If your dates are flexible, avoid enero, febrero and diciembre – historically the least comfortable months here.

How Cook County compares con nearby places

Annual averages, and the difference against Cook County.

PlaceDistanceAvg tempvs hereAnnual rain
Area Code 3120 km11°Cabout the same1034 mm
Chicago0 km11°Cabout the same1034 mm
The Loop1 km11°Cabout the same1034 mm
ZIP Code 606011 km11°Cabout the same1034 mm
Wicker Park5 km11°Cabout the same996 mm

Ver el pronóstico de Cook County por periodo

Cook County weather – more answers

Explore Cook County

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

Tiempo 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 América del Norte.

What is the weather like in Cook County ahora mismo?

It is currently 14°C (56°F) con mayormente despejado. Humedad is 84% and wind is 10 km/h.

When is the best time a visit Cook County?

may, junio, agosto, septiembre and octubre offer the most comfortable conditions in Cook County, which has a continental climate. enero, febrero and diciembre are usually the hardest months for outdoor plans.

What time zone is Cook County in?

Cook County observes America/Chicago (UTC-05:00). The hora local is 12:38 PM.

How many people live in Cook County?

Cook County has a population of approximately 5.1 million.

What is the nearest airport a Cook County?

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

What are the top things a 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.
Pronóstico and observationsOpen-Meteo (ECMWF and national models).
Calidad del aire and pollenCopernicus CAMS via Open-Meteo. US AQI scale.
Clima averagesERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years.
Official alertsUS National Tiempo 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 octubre 25, 2026 at 12:38 PM hora local. 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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