Illinois Időjárás Előrejelzés
Illinois weather: 13°C, derült. Óránként forecast, 14-day outlook, UV, air quality and the best time és visit.
Illinois weather in máj
A good month és visit Illinois.
máj runs 5°C warmer than the annual average in Illinois.
Időjárás map for Illinois
Animated model layers. Pick a layer és load it.
Animated layers by Szély. For pin-level detail and nearby places, see the interactive map below.
Éghajlat in Illinois month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Hónap | Avg high | Avg low | Esőfall | Rating |
|---|---|---|---|---|
| január | 1° | -7° | 62 mm | ★★☆☆☆ |
| február | 8° | -3° | 20 mm | ★★★☆☆ |
| március | 15° | 4° | 90 mm | ★★★☆☆ |
| április | 19° | 9° | 135 mm | ★★★☆☆ |
| máj | 24° | 13° | 100 mm | ★★★★☆ |
| június | 28° | 19° | 117 mm | ★★★★☆ |
| július | 30° | 21° | 129 mm | ★★★★☆ |
| augusztus | 29° | 19° | 75 mm | ★★★★☆ |
| szeptember | 27° | 17° | 35 mm | ★★★★☆ |
| október | 21° | 10° | 25 mm | ★★★★☆ |
| november | 12° | 3° | 79 mm | ★★★☆☆ |
| december | 6° | -2° | 62 mm | ★★☆☆☆ |
Éghajlat type: Kontinensal. Forrás: Open-Meteo archive (ERA5).
Legjobb idő a látogatásra Illinois
Go in augusztus, szeptember and október. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: január, február and december - expect the least comfortable mix of heat, cold or rain.
What és pack, what és skip
- Vglasses, 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 január, február and december - historically the least comfortable months here.
How Illinois compares és 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 | 1163 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 |
Előrejelzés: Illinois időszak szerint
Illinois weather - more answers
Explore Illinois
Every topic we hold for this place, and the same topic for the places around it.
Időjárás for related places
Frequently asked questions
Where is Illinois?
Illinois is a state in Egyesült Államok. Its coordinates are 39.7817, -89.6501. It lies in Észak-Amerika.
What is the weather like in Illinois jelenleg?
It is currently 13°C (56°F) és derült. Páratartalom is 70% and wind is 8 km/h.
When is the best time és visit Illinois?
augusztus, szeptember and október offer the most comfortable conditions in Illinois, which has a continental climate. január, február 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 5:08 AM.
How many people live in Illinois?
Illinois has a population of approximately 12.6 million.
What is the nearest airport és 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 és 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. |
|---|---|
| Előrejelzés and observations | Open-Meteo (ECMWF and national models). |
| Levegőminőség and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Éghajlat averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Időjárás 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 október 28, 2026 at 5:08 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
