Illinois Vreme Prognoza
Illinois weather: 13°C, vedro. Po satima forecast, 14-day outlook, UV, air quality and the best time do visit.
Illinois weather in oktobar
One of the best months do visit Illinois.
oktobar runs 2°C warmer than the annual average in Illinois.
Vreme map for Illinois
Animated model layers. Pick a layer do load it.
Animated layers by Vetary. For pin-level detail and nearby places, see the interactive map below.
Klima in Illinois month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Mesec | Avg high | Avg low | Kišafall | Rating |
|---|---|---|---|---|
| januar | 1° | -7° | 62 mm | ★★☆☆☆ |
| februar | 8° | -3° | 20 mm | ★★★☆☆ |
| mart | 15° | 4° | 90 mm | ★★★☆☆ |
| april | 19° | 9° | 135 mm | ★★★☆☆ |
| maj | 24° | 13° | 100 mm | ★★★★☆ |
| jun | 28° | 19° | 117 mm | ★★★★☆ |
| jul | 29° | 21° | 129 mm | ★★★★☆ |
| avgust | 29° | 19° | 75 mm | ★★★★☆ |
| septembar | 28° | 17° | 33 mm | ★★★★★ |
| oktobar | 20° | 10° | 37 mm | ★★★★☆ |
| novembar | 12° | 4° | 79 mm | ★★★☆☆ |
| decembar | 6° | -2° | 62 mm | ★★☆☆☆ |
Klima type: Kontinental. Izvor: Open-Meteo archive (ERA5).
Najbolje vreme za posetu Illinois
Go in avgust, septembar and oktobar. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: januar, februar and decembar - expect the least comfortable mix of heat, cold or rain.
What do pack, what do skip
- nedglasses, a brimmed hat and SPF 30+
- Layers - the daily swing is 18°C, so mornings feel nothing like afternoons
- A packable rain shell - 2 of the next 7 days carry a real chance of rain
- If your dates are flexible, avoid januar, februar and decembar - historically the least comfortable months here.
How Illinois compares uz nearby places
Annual averages, and the difference against Illinois.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Gateway Arch National Park | 137 km | 15°C | +1°C warmer | 1163 mm |
| St. Louis | 137 km | 15°C | +1°C warmer | 1156 mm |
| Missouri | 255 km | 15°C | +1°C warmer | 1006 mm |
| Indianapolis | 298 km | 13°C | 1°C cooler | 1135 mm |
| Indiana | 298 km | 13°C | 1°C cooler | 1135 mm |
Pogledajte prognozu za Illinois po vremenskom periodu
Illinois weather - more answers
Explore Illinois
Every topic we hold for this place, and the same topic for the places around it.
Vreme for related places
Frequently asked questions
Where is Illinois?
Illinois is a state in Сједињене Државе. Its coordinates are 39.7817, -89.6501. It lies in Severna Amerika.
What is the weather like in Illinois sada?
It is currently 13°C (56°F) uz vedro. Vlažnost is 70% and wind is 8 km/h.
When is the best time do visit Illinois?
avgust, septembar and oktobar offer the most comfortable conditions in Illinois, which has a continental climate. januar, februar and decembar 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 2:46 AM.
How many people live in Illinois?
Illinois has a population of approximately 12.6 million.
What is the nearest airport do 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 do 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. |
|---|---|
| Prognoza and observations | Open-Meteo (ECMWF and national models). |
| Kvalitet vazduha 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 Vreme 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 oktobar 28, 2026 at 2:46 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
