Best Time und Visit Illinois
Beste Reisezeit Illinois: August, September and Oktober. Mo.at-by-month temperature, rainfall and crowd guidance.
Beste Reisezeit Illinois
Go in August, September and Oktober. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: Januar, Februar and Dezember – expect the least comfortable mix of heat, cold or rain.
Klima in Illinois month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Monat | Durchschnittliches Maximum | Durchschnittliches Minimum | Niederschlag | Bewertung |
|---|---|---|---|---|
| Januar | 1° | -7° | 62 mm | ★★☆☆☆ |
| Februar | 8° | -3° | 20 mm | ★★★☆☆ |
| März | 15° | 4° | 90 mm | ★★★☆☆ |
| April | 19° | 9° | 135 mm | ★★★☆☆ |
| Mai | 24° | 13° | 100 mm | ★★★★☆ |
| Juni | 28° | 19° | 117 mm | ★★★★☆ |
| Juli | 29° | 21° | 129 mm | ★★★★☆ |
| August | 29° | 19° | 75 mm | ★★★★☆ |
| September | 28° | 17° | 33 mm | ★★★★★ |
| Oktober | 20° | 10° | 37 mm | ★★★★☆ |
| November | 12° | 4° | 79 mm | ★★★☆☆ |
| Dezember | 6° | -2° | 62 mm | ★★☆☆☆ |
Klima type: Kontinental. Quelle: Open-Meteo archive (ERA5).
How Illinois compares mit 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 |
Beste Reisezeit each city in Illinois
1 cities mapped in this atlas
Beste Reisezeit each state park in Illinois
1 state and provincial parks mapped in this atlas
Beste Reisezeit each county in Illinois
1 counties mapped in this atlas
Beste Reisezeit each lake in Illinois
1 lakes mapped in this atlas
What und pack, what und skip
- Lightweight, light-coloured clothing and a refillable water bottle
- So.glasses, a brimmed hat and SPF 30+
- Layers – the daily swing is 23°C, so mornings feel nothing like afternoons
- If your dates are flexible, avoid Januar, Februar and Dezember – historically the least comfortable months here.
Zusammenfassung
Illinois is a state in Vereinigte Staaten. Illinois is a US state mit der Hauptstadt Springfield. Die Einwohnerzahl beträgt etwa 12.6 million. Die Hauptstadt ist Springfield.
Aktuell sind es 11°C (51°F) in Illinois mit klar. Die gefühlte Temperatur beträgt 9°C. Heute liegen die Temperaturen zwischen 9°C und 23°C. Die Niederschlagswahrscheinlichkeit beträgt 0%. Die Bedingungen für Besichtigungen erreichen 8.9/10 – ausgezeichnet — jetzt los.
Die beste Reisezeit für Illinois is August, September and Oktober. Das Klima ist continental. Januar, Februar and Dezember sind meist die ungemütlichsten Mo.ate. Juli ist der wärmste Mo.at mit durchschnittlichen Höchstwerten um 29°C, während Januar ist der kälteste Mo.at mit Tiefstwerten um -7°C.
Der nächstgelegene große Flughafen ist O'Hare International Airport (ORD), about 284 km away. Zu den Sehenswürdigkeiten in der Nähe gehören Starved Rock State Park, Lake Michigan, Gateway Arch National Park and Indiana Dunes National Park.
Kurz gesagt. Today is slightly warmer than average for Oktober. The forecast high of 23°C is 2.9°C above the 20°C typical for this month. The best window und be outside is roughly 11 AM und 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.
Wetter in Illinois jetzt
Quelle: Open-Meteo. Aktualisiert 2:35 AM, Okt 5 Ortszeit.
Weekend outlook
☁️ 31° / 17°
Bedeckt · 2% rain · wind 21 km/h
🌦️ 22° / 16°
Leichter Regen · 7% rain · wind 22 km/h
Aktivitäten in Illinois
Sehenswürdigkeiten, parks and landmarks in and around Illinois.
Quick facts about Illinois
| Typ | State |
|---|---|
| Land | Vereinigte Staaten |
| Kontinent | Nordamerika |
| Koordinaten | 39°46′54.1″N 89°39′0.4″W (39.7817, -89.6501) |
| Capital | Springfield |
| Bevölkerung | 12.600.000 |
| Area | 149.995 km² |
| Abbreviation | IL |
| Zeitzone | America/Chicago |
| Ortszeit | 2:35 AM (UTC-05:00) |
| Beste Monate | August, September and Oktober |
| Klima | Kontinental |
Explore Illinois
Every topic we hold for this place, and the same topic for the places around it.
Best Time und Visit for related places
Frequently asked questions
Where is Illinois?
Illinois is a state in Vereinigte Staaten. Its coordinates are 39.7817, -89.6501. It lies in Nordamerika.
What is the weather like in Illinois jetzt?
It is currently 11°C (51°F) mit klar. Luftfeuchtigkeit is 74% and wind is 9 km/h.
When is the best time und visit Illinois?
August, September and Oktober offer the most comfortable conditions in Illinois, which has a continental climate. Januar, Februar and Dezember are usually the hardest months for outdoor plans.
What time zone is Illinois in?
Illinois observes America/Chicago (UTC-05:00). The Ortszeit is 2:35 AM.
How many people live in Illinois?
Illinois has a population of approximately 12.6 million.
What is the nearest airport und 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 und 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. |
|---|---|
| Vorhersage and observations | Open-Meteo (ECMWF and national models). |
| Luftqualität 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 Wetter 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 5, 2026 at 2:35 AM Ortszeit. Live blocks refresh every 15 minutes; climate averages monthly.
