Cook County Ilmasto and Average Sää
Ilmasto of Cook County: average temperatures, rainfall and seasons month by month.
Ilmasto in Cook County month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Kuukausi | Avg high | Avg low | Sadefall | Rating |
|---|---|---|---|---|
| tammikuu | -2° | -8° | 73 mm | ★★☆☆☆ |
| helmikuu | 4° | -4° | 19 mm | ★★★☆☆ |
| maaliskuu | 11° | 1° | 103 mm | ★★★☆☆ |
| huhtikuu | 15° | 6° | 113 mm | ★★★☆☆ |
| tou | 20° | 11° | 68 mm | ★★★★☆ |
| kesäkuu | 26° | 18° | 126 mm | ★★★★☆ |
| heinäkuu | 28° | 20° | 127 mm | ★★★★☆ |
| elokuu | 27° | 19° | 116 mm | ★★★★☆ |
| syyskuu | 24° | 17° | 74 mm | ★★★★☆ |
| lokakuu | 18° | 10° | 79 mm | ★★★★☆ |
| marraskuu | 10° | 3° | 68 mm | ★★★☆☆ |
| joulukuu | 3° | -3° | 68 mm | ★★☆☆☆ |
Ilmasto type: Maanosaal. Lähde: Open-Meteo archive (ERA5).
Recent extremes in Cook County
Korkeaest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Cook County compares ja 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 |
Paras aika vierailla Cook County
Go in tou, kesäkuu, elokuu, syyskuu and lokakuu. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: tammikuu, helmikuu and joulukuu - expect the least comfortable mix of heat, cold or rain.
What this means for Cook County
Today is about average for lokakuu. The forecast high of 19°C is in line ja the 18°C typical for this month.
Sade 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 kesäkuu ja elokuu.
The gap between the warmest and coldest month averages 29°C.
What ja pack, what ja skip
- Layers - the daily swing is 15°C, so mornings feel nothing like afternoons
- If your dates are flexible, avoid tammikuu, helmikuu and joulukuu - historically the least comfortable months here.
Yhteenveto
Cook County is a county in Illinois. Cook County is a county in the United States. Väkiluku on noin 5.1 million.
Tällä hetkellä lämpötila on 11°C (52°F) in Cook County ja sumu. Tuntuu kuin 10°C. Tänään lämpötila vaihtelee 7°C ja 19°C. laeen todennäköisyys on 0%. Sightseeing conditions score 9.3/10 - erinomainen — lähde nyt.
Paras aika matkustaa kohteeseen Cook County is tou, kesäkuu, elokuu, syyskuu and lokakuu. Ilmasto on continental. tammikuu, helmikuu and joulukuu tend ja be the least comfortable months. heinäkuu is the warmest month ja average highs near 28°C, while tammikuu is the coldest ja 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.
Yksinkertaisesti sanottuna. Today is about average for lokakuu. The forecast high of 19°C is in line ja the 18°C typical for this month. The best window ja be outside is roughly 1 PM ja 4 PM, when temperature, rain chance and wind line up best. hiking is the strongest bet in Cook County today at 9.9/10. 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
| Tyyppi | County |
|---|---|
| State | Illinois |
| Maa | Yhdysvallat |
| Maanosa | Pohjois-Amerikka |
| Koordinaatit | 41°52′41.2″N 87°37′47.3″W (41.8781, -87.6298) |
| Väkiluku | 5.100.000 |
| Paikallinen aika | 12:13 AM (UTC-05:00) |
| Best months | tou, kesäkuu, elokuu, syyskuu and lokakuu |
| Ilmasto | Maanosaal |
Sää map for Cook County
Animated model layers. Pick a layer ja load it.
Animated layers by Tuuliy. 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.
Ilmasto 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 Pohjois-Amerikka.
What is the weather like in Cook County nyt?
It is currently 11°C (52°F) ja sumu. Kosteus is 78% and wind is 2 km/h.
When is the best time ja visit Cook County?
tou, kesäkuu, elokuu, syyskuu and lokakuu offer the most comfortable conditions in Cook County, which has a continental climate. tammikuu, helmikuu and joulukuu 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 12:13 AM.
How many people live in Cook County?
Cook County has a population of approximately 5.1 million.
What is the nearest airport ja Cook County?
The closest airports are O'Hare International Airport (ORD), 25 km away.
What are the top things ja 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. |
|---|---|
| Ennuste and observations | Open-Meteo (ECMWF and national models). |
| Ilmanlaatu and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Ilmasto averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Sää 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 lokakuu 23, 2026 at 12:13 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
