Best Time și Visit Illinois
Cea mai bună perioadă Illinois: august, septembrie and octombrie. Lună-by-month temperature, rainfall and crowd guidance.
Cea mai bună perioadă Illinois
Go in august, septembrie and octombrie. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: ianuarie, februarie and decembrie - expect the least comfortable mix of heat, cold or rain.
Climă in Illinois month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Lună | Avg high | Avg low | Ploaiefall | Rating |
|---|---|---|---|---|
| ianuarie | 1° | -7° | 62 mm | ★★☆☆☆ |
| februarie | 8° | -3° | 20 mm | ★★★☆☆ |
| martie | 15° | 4° | 90 mm | ★★★☆☆ |
| aprilie | 19° | 9° | 135 mm | ★★★☆☆ |
| mai | 24° | 13° | 100 mm | ★★★★☆ |
| iunie | 28° | 19° | 117 mm | ★★★★☆ |
| iulie | 29° | 21° | 129 mm | ★★★★☆ |
| august | 29° | 19° | 75 mm | ★★★★☆ |
| septembrie | 28° | 17° | 33 mm | ★★★★★ |
| octombrie | 20° | 10° | 37 mm | ★★★★☆ |
| noiembrie | 12° | 4° | 79 mm | ★★★☆☆ |
| decembrie | 6° | -2° | 62 mm | ★★☆☆☆ |
Climă type: Continental. Sursă: Open-Meteo archive (ERA5).
How Illinois compares cu 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 |
Cea mai bună perioadă each city in Illinois
1 cities mapped in this atlas
Cea mai bună perioadă each state park in Illinois
1 state and provincial parks mapped in this atlas
Cea mai bună perioadă each county in Illinois
1 counties mapped in this atlas
Cea mai bună perioadă each lake in Illinois
1 lakes mapped in this atlas
What și pack, what și skip
- dumglasses, 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 ianuarie, februarie and decembrie - historically the least comfortable months here.
Rezumat
Illinois is a state in Statele Unite ale Americii. Illinois is a US state cu capitala la Springfield. Are o populație de aproximativ 12.6 million. Capitala este Springfield.
Acum sunt 18°C (64°F) in Illinois cu senin. Temperatura resimțită este 15°C. Astăzi temperaturile variază între 7°C și 24°C. Probabilitatea de precipitații este de 0%. Sightseeing conditions score 9.7/10 - excelent — pleacă acum.
Cea mai bună perioadă pentru a vizita Illinois is august, septembrie and octombrie. Clima este continental. ianuarie, februarie and decembrie tend și be the least comfortable months. iulie is the warmest month cu average highs near 29°C, while ianuarie is the coldest cu lows near -7°C.
The closest major airport is O'Hare International Airport (ORD), about 284 km away. Nearby highlights include Starved Rock State Park, Lake Michigan, Gateway Arch National Park and Indiana Dunes National Park.
Pe scurt. Today is slightly warmer than average for octombrie. The forecast high of 24°C is 3.6°C above the 20°C typical for this month. The best window și be outside is roughly 11 AM și 2 PM, when temperature, rain chance and wind line up best. stargazing is the strongest bet in Illinois today at 10/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Vremea în Illinois acum
Open-Meteo Updated 12:58 PM, oct 24 local time.
Weekend outlook
☁️ 24° / 9°
Acoperit · 2% rain · wind 11 km/h
☁️ 24° / 10°
Acoperit · 2% rain · wind 10 km/h
Lucruri de făcut in Illinois
Atracții, parks and landmarks in and around Illinois.
Quick facts about Illinois
| Tip | State |
|---|---|
| Țară | Statele Unite ale Americii |
| Continent | America de Nord |
| Coordonate | 39°46′54.1″N 89°39′0.4″W (39.7817, -89.6501) |
| Capital | Springfield |
| Populație | 12.600.000 |
| Area | 149.995 km² |
| Abbreviation | IL |
| Fus orar | America/Chicago |
| Ora locală | 12:58 PM (UTC-05:00) |
| Best months | august, septembrie and octombrie |
| Climă | Continental |
Explore Illinois
Every topic we hold for this place, and the same topic for the places around it.
Best Time și Visit for related places
Frequently asked questions
Where is Illinois?
Illinois is a state in Statele Unite ale Americii. Its coordinates are 39.7817, -89.6501. It lies in America de Nord.
What is the weather like in Illinois acum?
It is currently 18°C (64°F) cu senin. Umiditate is 39% and wind is 8 km/h.
When is the best time și visit Illinois?
august, septembrie and octombrie offer the most comfortable conditions in Illinois, which has a continental climate. ianuarie, februarie and decembrie 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 12:58 PM.
How many people live in Illinois?
Illinois has a population of approximately 12.6 million.
What is the nearest airport și 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 și 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. |
|---|---|
| Prognoză and observations | Open-Meteo (ECMWF and national models). |
| Calitatea aerului and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climă averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Vreme 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 octombrie 24, 2026 at 12:58 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
