Cook County Vejr Prognose
Cook County weather: 19°C, klar himmel. Hver time forecast, 14-day outlook, UV, air quality and the best time og visit.
Sne forecast for Cook County
No snow is in the current forecast window for Cook County.
0 of the next 16 nights are forecast og reach freezing.
Historically, average lows drop below freezing in januar, februar and december.
16-day forecast for Cook County
Maks. / Min.; Nedbør; UV
| Dag | Forhold | Maks. / Min. | Nedbør | Vind | UV |
|---|---|---|---|---|---|
| søn, okt 4 | ☁️ Overskyet | 21° / 10° | 9% | 14 km/h | 5 |
| man, okt 5 | ☀️ Klar himmel | 17° / 8° | 0% | 13 km/h | 5 |
| tir, okt 6 | ☀️ Klar himmel | 22° / 9° | 2% | 22 km/h | 5 |
| ons, okt 7 | ☁️ Overskyet | 24° / 16° | 1% | 18 km/h | 4 |
| tor, okt 8 | ☁️ Overskyet | 20° / 15° | 3% | 16 km/h | 5 |
| fre, okt 9 | ☁️ Overskyet | 21° / 14° | 4% | 12 km/h | 4 |
| lør, okt 10 | 🌦️ Light drizzle | 26° / 16° | 4% · 0 mm | 19 km/h | 4 |
| søn, okt 11 | ☁️ Overskyet | 26° / 19° | 8% | 17 km/h | 4 |
| man, okt 12 | ☀️ Klar himmel | 26° / 17° | 29% | 17 km/h | 4 |
| tir, okt 13 | 🌧️ Byger | 26° / 14° | 23% · 12 mm | 23 km/h | 4 |
| ons, okt 14 | 🌦️ Light drizzle | 13° / 7° | 23% · 0 mm | 22 km/h | 1 |
| tor, okt 15 | 🌦️ Light drizzle | 10° / 8° | 16% · 0 mm | 21 km/h | 2 |
| fre, okt 16 | ☁️ Overskyet | 14° / 8° | 16% | 12 km/h | 4 |
| lør, okt 17 | ⛅ Delvist skyet | 17° / 9° | 10% | 17 km/h | 4 |
| søn, okt 18 | 🌦️ Light drizzle | 13° / 8° | 12% · 0 mm | 22 km/h | 1 |
| man, okt 19 | 🌤️ Mest klart | 12° / 5° | 14% | 21 km/h | 4 |
Klima in Cook County month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Måned | Avg high | Avg low | Regnfall | Rating |
|---|---|---|---|---|
| januar | -2° | -8° | 73 mm | ★★☆☆☆ |
| februar | 4° | -4° | 19 mm | ★★★☆☆ |
| marts | 11° | 1° | 103 mm | ★★★☆☆ |
| april | 15° | 6° | 113 mm | ★★★☆☆ |
| maj | 20° | 11° | 68 mm | ★★★★☆ |
| juni | 26° | 18° | 126 mm | ★★★★☆ |
| juli | 28° | 20° | 127 mm | ★★★★☆ |
| august | 27° | 19° | 116 mm | ★★★★☆ |
| september | 24° | 17° | 74 mm | ★★★★☆ |
| oktober | 18° | 10° | 79 mm | ★★★★☆ |
| november | 10° | 3° | 68 mm | ★★★☆☆ |
| december | 3° | -3° | 68 mm | ★★☆☆☆ |
Klima type: Kontinental. Kilde: Open-Meteo archive (ERA5).
What og pack, what og skip
- sønglasses, a brimmed hat and SPF 30+
- Layers - the daily swing is 18°C, so mornings feel nothing like afternoons
- If your dates are flexible, avoid januar, februar and december - historically the least comfortable months here.
Se prognosen for Cook County efter tidsinterval
Cook County weather - more answers
Explore Cook County
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Frequently asked questions
Where is Cook County?
Cook County is a county in Illinois. Its coordinates are 41.8781, -87.6298. It lies in Nordamerika.
What is the weather like in Cook County lige nu?
It is currently 19°C (65°F) med klar himmel. Luftfugtighed is 51% and wind is 8 km/h.
When is the best time og visit Cook County?
maj, juni, august, september and oktober offer the most comfortable conditions in Cook County, which has a continental climate. januar, februar 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 5:16 PM.
How many people live in Cook County?
Cook County has a population of approximately 5.1 million.
What is the nearest airport og Cook County?
The closest airports are O'Hare International Airport (ORD), 25 km away.
What are the top things og 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. |
|---|---|
| Prognose and observations | Open-Meteo (ECMWF and national models). |
| Luftkvalitet and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Klima averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Vejr 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 oktober 4, 2026 at 5:16 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
