Illinois Počasí Předpověď
Illinois weather: 24°C, zataženo. Po hodinách forecast, 14-day outlook, UV, air quality and the best time do visit.
Sníh forecast for Illinois
No snow is in the current forecast window for Illinois.
0 of the next 16 nights are forecast do reach freezing.
Historically, average lows drop below freezing in leden, únor and prosinec.
16-day forecast for Illinois
Max. / Min.; Srážky; UV
| Den | Podmínky | Max. / Min. | Srážky | Vítr | UV |
|---|---|---|---|---|---|
| čt, říj 1 | 🌧️ Déšť | 31° / 18° | 73% · 15 mm | 23 km/h | 3 |
| pá, říj 2 | 🌦️ Mrholení | 19° / 12° | 58% · 1 mm | 19 km/h | 5 |
| so, říj 3 | ☁️ Zataženo | 23° / 9° | 0% | 15 km/h | 5 |
| ne, říj 4 | ⛅ Polojasno | 24° / 12° | 0% | 18 km/h | 5 |
| po, říj 5 | ☁️ Zataženo | 19° / 8° | 0% | 17 km/h | 5 |
| út, říj 6 | 🌤️ Většinou jasno | 20° / 5° | 0% | 15 km/h | 5 |
| st, říj 7 | ☁️ Zataženo | 26° / 10° | 3% | 18 km/h | 5 |
| čt, říj 8 | ☀️ Jasná obloha | 23° / 9° | 3% | 12 km/h | 5 |
| pá, říj 9 | ⛅ Polojasno | 27° / 10° | 1% | 21 km/h | 5 |
| so, říj 10 | ☁️ Zataženo | 29° / 16° | 3% | 28 km/h | 5 |
| ne, říj 11 | ☁️ Zataženo | 23° / 11° | 12% | 25 km/h | 5 |
| po, říj 12 | ☀️ Jasná obloha | 23° / 8° | 15% | 14 km/h | 5 |
| út, říj 13 | 🌤️ Většinou jasno | 23° / 10° | 16% | 12 km/h | 5 |
| st, říj 14 | ☀️ Jasná obloha | 28° / 12° | 16% | 28 km/h | 5 |
| čt, říj 15 | 🌤️ Většinou jasno | 26° / 12° | 7% | 34 km/h | 5 |
| pá, říj 16 | ☀️ Jasná obloha | -- / -- | 13% | -- | — |
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 | 29° | 19° | 75 mm | ★★★★☆ |
| září | 28° | 17° | 33 mm | ★★★★★ |
| říjen | 20° | 10° | 37 mm | ★★★★☆ |
| listopad | 12° | 4° | 79 mm | ★★★☆☆ |
| prosinec | 6° | -2° | 62 mm | ★★☆☆☆ |
Klima type: Kontinental. Zdroj: Open-Meteo archive (ERA5).
What do pack, what do skip
- Lightweight, light-coloured clothing and a refillable water bottle
- neglasses, a brimmed hat and SPF 30+
- Layers - the daily swing is 26°C, so mornings feel nothing like afternoons
- A packable rain shell - 2 of the next 7 days carry a real chance of rain
- Avoid exposed ridgelines, small boats and rooftop viewpoints while gusts stay above 51 km/h.
- If your dates are flexible, avoid leden, únor and prosinec - historically the least comfortable months here.
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 24°C (75°F) s zataženo. Vlhkost is 52% and wind is 10 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 4:38 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. |
|---|---|
| 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 říjen 1, 2026 at 4:38 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
