Illinois Počasí Předpověď
Illinois weather: 23°C, jasná obloha. Po hodinách forecast, 14-day outlook, UV, air quality and the best time do visit.
Illinois weather in červenec
A good month do visit Illinois.
červenec runs 12°C warmer than the annual average in Illinois.
Počasí map for Illinois
Animated model layers. Pick a layer do load it.
Animated layers by Vítry. 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.
| Měsíc | Avg high | Avg low | Déšťfall | Rating |
|---|---|---|---|---|
| leden | 1° | -7° | 62 mm | ★★☆☆☆ |
| únor | 8° | -3° | 20 mm | ★★★☆☆ |
| březen | 15° | 4° | 90 mm | ★★★☆☆ |
| duben | 19° | 9° | 135 mm | ★★★☆☆ |
| kvě | 24° | 13° | 100 mm | ★★★★☆ |
| červen | 28° | 19° | 117 mm | ★★★★☆ |
| červenec | 29° | 21° | 129 mm | ★★★★☆ |
| srpen | 28° | 19° | 47 mm | ★★★★☆ |
| září | 27° | 16° | 42 mm | ★★★★☆ |
| říjen | 20° | 10° | 37 mm | ★★★★☆ |
| listopad | 12° | 4° | 79 mm | ★★★☆☆ |
| prosinec | 6° | -2° | 62 mm | ★★☆☆☆ |
Klima type: Kontinental. Zdroj: Open-Meteo archive (ERA5).
Nejlepší doba k návštěvě Illinois
Go in srpen, září and říjen. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: leden, únor and prosinec - expect the least comfortable mix of heat, cold or rain.
What do pack, what do skip
- Lightweight, light-coloured clothing and a refillable water bottle
- neglasses, a brimmed hat and SPF 30+
- If your dates are flexible, avoid leden, únor and prosinec - historically the least comfortable months here.
How Illinois compares s 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 | 1144 mm |
| St. Louis | 137 km | 15°C | +1°C warmer | 1144 mm |
| Missouri | 255 km | 14°C | +1°C warmer | 1002 mm |
| Indianapolis | 298 km | 13°C | 1°C cooler | 1094 mm |
| Indiana | 298 km | 13°C | 1°C cooler | 1094 mm |
Zobrazit předpověď pro Illinois podle časového období
Illinois weather - more answers
Explore Illinois
Every topic we hold for this place, and the same topic for the places around it.
Počasí for related places
Frequently asked questions
Where is Illinois?
Illinois is a state in Spojené státy. Its coordinates are 39.7817, -89.6501. It lies in Severní Amerika.
What is the weather like in Illinois právě teď?
It is currently 23°C (73°F) s jasná obloha. Vlhkost is 59% and wind is 7 km/h.
When is the best time do visit Illinois?
srpen, září and říjen offer the most comfortable conditions in Illinois, which has a continental climate. leden, únor and prosinec 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 7:36 PM.
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. |
|---|---|
| Předpověď and observations | Open-Meteo (ECMWF and national models). |
| Kvalita ovzduší 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 Počasí 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 srpen 24, 2026 at 7:36 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
