Illinois Vejr Prognose
Illinois weather: 28°C, delvist skyet. Hver time forecast, 14-day outlook, UV, air quality and the best time og visit.
Risk assessment for Illinois
Derived from the current forecast window - not an official warning.
13 dry days, 0 days above 32°C and humidity at 51%. Hot, dry and windy together is what drives fire spread.
Light haze overhead lige nu. Aerosol readings cannot separate wildfire smoke from dust, so treat this as a haze signal, not a fire confirmation.
Luftkvalitet and pollen in Illinois
Luftkvalitet: Open-Meteo (CAMS). US AQI scale.
Health and safety today
| Skin and UV | No protection needed for most skin types. |
|---|---|
| Pets | Pavement can be 20°C hotter than the air. Walk dogs early or late, never leave animals in cars, and carry water. |
| Older adults | Heat builds up slowly indoors. Check on anyone over 65 living alone and keep rooms ventilated. |
| Children | Small bodies overheat faster than adults. Shade, hats and frequent drinks; skip midday sport. |
Se prognosen for Illinois efter tidsinterval
Illinois weather - more answers
Explore Illinois
Every topic we hold for this place, and the same topic for the places around it.
Vejr for related places
Frequently asked questions
Where is Illinois?
Illinois is a state in USA. Its coordinates are 39.7817, -89.6501. It lies in Nordamerika.
What is the weather like in Illinois lige nu?
It is currently 28°C (82°F) med delvist skyet. Luftfugtighed is 51% and wind is 10 km/h.
When is the best time og visit Illinois?
august, september and oktober offer the most comfortable conditions in Illinois, which has a continental climate. januar, februar and december are usually the hardest months for outdoor plans.
What time zone is Illinois in?
Illinois observes America/Chicago (UTC-05:00). The local time is 5:11 PM.
How many people live in Illinois?
Illinois has a population of approximately 12.6 million.
What is the nearest airport og Illinois?
The closest airports are O'Hare International Airport (ORD), 284 km away and Nashville International Airport (BNA), 483 km away.
What are the top things og do in Illinois?
Popular options include Starved Rock State Park, Lake Michigan, Gateway Arch National Park and Indiana Dunes National Park.
What places are in Illinois?
Illinois covers 4 places in this atlas, including Chicago, Starved Rock State Park, Cook County and Lake Michigan.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (us-states) - 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 september 30, 2026 at 5:11 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
