Illinois Погода Прогноз
Illinois weather: 14°C, Преимущественно ясно. Почасовой forecast, 14-day outlook, UV, air quality and the best time до visit.
Климат in Illinois month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Месяц | Avg high | Avg low | Дождьfall | Rating |
|---|---|---|---|---|
| январь | 1° | -7° | 62 mm | ★★☆☆☆ |
| февраль | 8° | -3° | 20 mm | ★★★☆☆ |
| март | 15° | 4° | 90 mm | ★★★☆☆ |
| апрель | 19° | 9° | 135 mm | ★★★☆☆ |
| май | 24° | 13° | 100 mm | ★★★★☆ |
| июнь | 28° | 19° | 117 mm | ★★★★☆ |
| июль | 29° | 21° | 129 mm | ★★★★☆ |
| август | 29° | 19° | 75 mm | ★★★★☆ |
| сентябрь | 28° | 17° | 33 mm | ★★★★★ |
| октябрь | 20° | 10° | 37 mm | ★★★★☆ |
| ноябрь | 12° | 4° | 79 mm | ★★★☆☆ |
| декабрь | 6° | -2° | 62 mm | ★★☆☆☆ |
Климат type: Континентal. Источник: Open-Meteo archive (ERA5).
Лучшее время для посещения Illinois
Go in август, сентябрь and октябрь. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: январь, февраль and декабрь - expect the least comfortable mix of heat, cold or rain.
Recent extremes in Illinois
Высокийest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Illinois compares и 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 | 1156 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 |
What до pack, what до skip
- всglasses, a brimmed hat and SPF 30+
- Layers - the daily swing is 19°C, so mornings feel nothing like afternoons
- If your dates are flexible, avoid январь, февраль and декабрь - historically the least comfortable months here.
Прогноз для Illinois по периоду
Illinois weather - more answers
Explore Illinois
Every topic we hold for this place, and the same topic for the places around it.
Погода for related places
Frequently asked questions
Where is Illinois?
Illinois is a state in Соединенные Штаты. Its coordinates are 39.7817, -89.6501. It lies in Северная Америка.
What is the weather like in Illinois сейчас?
It is currently 14°C (57°F) и Преимущественно ясно. Влажность is 71% and wind is 7 km/h.
When is the best time до visit Illinois?
август, сентябрь and октябрь offer the most comfortable conditions in Illinois, which has a continental climate. январь, февраль and декабрь 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 10:57 PM.
How many people live in Illinois?
Illinois has a population of approximately 12.6 million.
What is the nearest airport до 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 до 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. |
|---|---|
| Прогноз and observations | Open-Meteo (ECMWF and national models). |
| Качество воздуха and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Климат averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Погода 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 октябрь 25, 2026 at 10:57 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
