Illinois Cuaca Ramalan
Illinois weather: 18°C, cerah. Setiap jam forecast, 14-day outlook, UV, air quality and the best time hingga visit.
Illinois weather in Julai
A good month hingga visit Illinois.
Julai runs 12°C warmer than the annual average in Illinois.
Cuaca map for Illinois
Animated model layers. Pick a layer hingga load it.
Animated layers by Anginy. For pin-level detail and nearby places, see the interactive map below.
Iklim in Illinois month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Bulan | Avg high | Avg low | Hujanfall | Rating |
|---|---|---|---|---|
| Januari | 1° | -7° | 62 mm | ★★☆☆☆ |
| Februari | 8° | -3° | 20 mm | ★★★☆☆ |
| Mac | 15° | 4° | 90 mm | ★★★☆☆ |
| April | 19° | 9° | 135 mm | ★★★☆☆ |
| Mei | 24° | 13° | 100 mm | ★★★★☆ |
| Jun | 28° | 19° | 117 mm | ★★★★☆ |
| Julai | 30° | 21° | 129 mm | ★★★★☆ |
| Ogos | 29° | 19° | 75 mm | ★★★★☆ |
| September | 27° | 17° | 35 mm | ★★★★☆ |
| Oktober | 21° | 10° | 25 mm | ★★★★☆ |
| November | 12° | 3° | 79 mm | ★★★☆☆ |
| Disember | 6° | -2° | 62 mm | ★★☆☆☆ |
Iklim type: Benuaal. Sumber: Open-Meteo archive (ERA5).
Masa terbaik untuk berkunjung Illinois
Go in Ogos, September and Oktober. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: Januari, Februari and Disember - expect the least comfortable mix of heat, cold or rain.
What hingga pack, what hingga skip
- Ahaglasses, a brimmed hat and SPF 30+
- A packable rain shell - 2 of the next 7 days carry a real chance of rain
- If your dates are flexible, avoid Januari, Februari and Disember - historically the least comfortable months here.
How Illinois compares dengan 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 | 1000 mm |
| Indianapolis | 298 km | 13°C | 1°C cooler | 1135 mm |
| Indiana | 298 km | 13°C | 1°C cooler | 1135 mm |
Lihat ramalan untuk Illinois mengikut tempoh
Illinois weather - more answers
Explore Illinois
Every topic we hold for this place, and the same topic for the places around it.
Cuaca for related places
Frequently asked questions
Where is Illinois?
Illinois is a state in Amerika Syarikat. Its coordinates are 39.7817, -89.6501. It lies in Amerika Utara.
What is the weather like in Illinois sekarang?
It is currently 18°C (64°F) dengan cerah. Kelembapan is 57% and wind is 16 km/h.
When is the best time hingga visit Illinois?
Ogos, September and Oktober offer the most comfortable conditions in Illinois, which has a continental climate. Januari, Februari and Disember 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 11:29 PM.
How many people live in Illinois?
Illinois has a population of approximately 12.6 million.
What is the nearest airport hingga 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 hingga 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. |
|---|---|
| Ramalan and observations | Open-Meteo (ECMWF and national models). |
| Kualiti udara and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Iklim averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Cuaca 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 Oktober 28, 2026 at 11:29 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
