Cook County المناخ and Average الطقس
المناخ of Cook County: average temperatures, rainfall and seasons month by month.
المناخ in Cook County month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| الشهر | Avg high | Avg low | مطرfall | Rating |
|---|---|---|---|---|
| يناير | -2° | -8° | 73 mm | ★★☆☆☆ |
| فبراير | 4° | -4° | 19 mm | ★★★☆☆ |
| مارس | 11° | 1° | 103 mm | ★★★☆☆ |
| أبريل | 15° | 6° | 113 mm | ★★★☆☆ |
| ماي | 20° | 11° | 68 mm | ★★★★☆ |
| يونيو | 26° | 18° | 126 mm | ★★★★☆ |
| يوليو | 28° | 20° | 127 mm | ★★★★☆ |
| أغسطس | 27° | 19° | 116 mm | ★★★★☆ |
| سبتمبر | 24° | 17° | 74 mm | ★★★★☆ |
| أكتوبر | 18° | 10° | 79 mm | ★★★★☆ |
| نوفمبر | 10° | 3° | 68 mm | ★★★☆☆ |
| ديسمبر | 3° | -3° | 68 mm | ★★☆☆☆ |
المناخ type: القارةal. المصدر: Open-Meteo archive (ERA5).
Recent extremes in Cook County
مرتفعest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Cook County compares مع nearby places
Annual averages, and the difference against Cook County.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Area Code 312 | 0 km | 11°C | about the same | 1034 mm |
| Chicago | 0 km | 11°C | about the same | 1034 mm |
| The Loop | 1 km | 11°C | about the same | 1034 mm |
| ZIP Code 60601 | 1 km | 11°C | about the same | 1034 mm |
| Wicker Park | 5 km | 11°C | about the same | 996 mm |
أفضل وقت للزيارة Cook County
Go in ماي, يونيو, أغسطس, سبتمبر and أكتوبر. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: يناير, فبراير and ديسمبر - expect the least comfortable mix of heat, cold or rain.
What this means for Cook County
Today is slightly warmer than average for أكتوبر. The forecast high of 22°C is 3.6°C above the 18°C typical for this month.
مطر is very unlikely today - plans do not need a backup.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in يونيو و أغسطس.
The gap between the warmest and coldest month averages 29°C.
What و pack, what و skip
- Layers - the daily swing is 13°C, so mornings feel nothing like afternoons
- If your dates are flexible, avoid يناير, فبراير and ديسمبر - historically the least comfortable months here.
الملخص
Cook County is a county in Illinois. Cook County is a county in the United States. يبلغ عدد سكانها نحو 5.1 million.
درجة الحرارة الآن 13°C (55°F) in Cook County مع صافٍ. المحسوسة 11°C. تتراوح درجات الحرارة اليوم بين 9°C و 22°C. احتمال هطول الأمطار 1%. Sightseeing conditions score 9.3/10 - ممتاز — انطلق الآن.
أفضل وقت لزيارة Cook County is ماي, يونيو, أغسطس, سبتمبر and أكتوبر. المناخ continental. يناير, فبراير and ديسمبر tend و be the least comfortable months. يوليو is the warmest month مع average highs near 28°C, while يناير is the coldest مع lows near -8°C.
The closest major airport is O'Hare International Airport (ORD), about 25 km away. Nearby highlights include Indiana Dunes National Park, Starved Rock State Park and Lake Michigan.
باختصار. Today is slightly warmer than average for أكتوبر. The forecast high of 22°C is 3.6°C above the 18°C typical for this month. The best window و be outside is roughly 10 AM و 1 PM, when temperature, rain chance and wind line up best. hiking is the strongest bet in Cook County today at 9.7/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Cook County
| النوع | County |
|---|---|
| State | Illinois |
| الدولة | الولايات المتحدة |
| القارة | أمريكا الشمالية |
| الإحداثيات | 41°52′41.2″N 87°37′47.3″W (41.8781, -87.6298) |
| السكان | 5.100.000 |
| التوقيت المحلي | 2:55 PM (UTC-05:00) |
| Best months | ماي, يونيو, أغسطس, سبتمبر and أكتوبر |
| المناخ | القارةal |
الطقس map for Cook County
Animated model layers. Pick a layer و load it.
Animated layers by الرياحy. For pin-level detail and nearby places, see the interactive map below.
Explore Cook County
Every topic we hold for this place, and the same topic for the places around it.
المناخ 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 أمريكا الشمالية.
What is the weather like in Cook County الآن?
It is currently 13°C (55°F) مع صافٍ. الرطوبة is 71% and wind is 8 km/h.
When is the best time و visit Cook County?
ماي, يونيو, أغسطس, سبتمبر and أكتوبر offer the most comfortable conditions in Cook County, which has a continental climate. يناير, فبراير and ديسمبر 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 2:55 PM.
How many people live in Cook County?
Cook County has a population of approximately 5.1 million.
What is the nearest airport و Cook County?
The closest airports are O'Hare International Airport (ORD), 25 km away.
What are the top things و 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 data | USPOTUS Atlas dataset (us-counties) - coordinates, hierarchy and facts. |
|---|---|
| التوقعات and observations | Open-Meteo (ECMWF and national models). |
| جودة الهواء and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| المناخ averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National الطقس Service. |
| Method | Scores, 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 أكتوبر 26, 2026 at 2:55 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
