Illinois 날씨 예보
Illinois weather: 15°C, 맑음. 시간별 forecast, 14-day outlook, UV, air quality and the best time에서 visit.
Illinois weather in 2월
A workable month,이며 trade-offs.
2월 runs 11°C cooler than the annual average in Illinois.
날씨 map for Illinois
Animated model layers. Pick a layer에서 load it.
Animated layers by 바람y. For pin-level detail and nearby places, see the interactive map below.
기후 in Illinois month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| 월 | Avg high | Avg low | 비fall | Rating |
|---|---|---|---|---|
| 1월 | 1° | -7° | 62 mm | ★★☆☆☆ |
| 2월 | 8° | -3° | 20 mm | ★★★☆☆ |
| 3월 | 15° | 4° | 90 mm | ★★★☆☆ |
| 4월 | 19° | 9° | 135 mm | ★★★☆☆ |
| 5월 | 24° | 13° | 100 mm | ★★★★☆ |
| 6월 | 28° | 19° | 117 mm | ★★★★☆ |
| 7월 | 29° | 21° | 129 mm | ★★★★☆ |
| 8월 | 29° | 19° | 75 mm | ★★★★☆ |
| 9월 | 28° | 17° | 33 mm | ★★★★★ |
| 10월 | 20° | 10° | 37 mm | ★★★★☆ |
| 11월 | 12° | 4° | 79 mm | ★★★☆☆ |
| 12월 | 6° | -2° | 62 mm | ★★☆☆☆ |
기후 type: 대륙al. 출처: Open-Meteo archive (ERA5).
방문하기 좋은 시기 Illinois
Go in 8월, 9월 and 10월. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: 1월, 2월 and 12월 - expect the least comfortable mix of heat, cold or rain.
What에서 pack, what에서 skip
- 일glasses, a brimmed hat and SPF 30+
- Layers - the daily swing is 20°C, so mornings feel nothing like afternoons
- If your dates are flexible, avoid 1월, 2월 and 12월 - historically the least comfortable months here.
How Illinois compares이며 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 |
시간대별 Illinois 예보 보기
Illinois weather - more answers
Explore Illinois
Every topic we hold for this place, and the same topic for the places around it.
날씨 for related places
Frequently asked questions
Where is Illinois?
Illinois is a state in 미국. Its coordinates are 39.7817, -89.6501. It lies in 북아메리카.
What is the weather like in Illinois 현재?
It is currently 15°C (59°F)이며 맑음. 습도 is 48% and wind is 6 km/h.
When is the best time에서 visit Illinois?
8월, 9월 and 10월 offer the most comfortable conditions in Illinois, which has a continental climate. 1월, 2월 and 12월 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 5:46 AM.
How many people live in Illinois?
Illinois has a population of approximately 12.6 million.
What is the nearest airport에서 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 things에서 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. |
|---|---|
| 예보 and observations | Open-Meteo (ECMWF and national models). |
| 대기질 and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| 기후 averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National 날씨 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 10월 22, 2026 at 5:46 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
