Illinois जलवायु and Average मौसम
जलवायु of Illinois: average temperatures, rainfall and seasons month by month.
जलवायु in Illinois month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| महीना | Avg high | Avg low | बारिशfall | Rating |
|---|---|---|---|---|
| जनवरी | 1° | -7° | 62 mm | ★★☆☆☆ |
| फ़रवरी | 8° | -3° | 20 mm | ★★★☆☆ |
| मार्च | 15° | 4° | 90 mm | ★★★☆☆ |
| अप्रैल | 19° | 9° | 135 mm | ★★★☆☆ |
| मई | 24° | 13° | 100 mm | ★★★★☆ |
| जून | 28° | 19° | 117 mm | ★★★★☆ |
| जुलाई | 29° | 21° | 129 mm | ★★★★☆ |
| अगस्त | 29° | 19° | 75 mm | ★★★★☆ |
| सितंबर | 28° | 17° | 33 mm | ★★★★★ |
| अक्टूबर | 20° | 10° | 37 mm | ★★★★☆ |
| नवंबर | 12° | 4° | 79 mm | ★★★☆☆ |
| दिसंबर | 6° | -2° | 62 mm | ★★☆☆☆ |
जलवायु type: महाद्वीपal. स्रोत: Open-Meteo archive (ERA5).
Recent extremes in Illinois
उच्चest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Illinois compares के साथ 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 |
जलवायु by city in Illinois
1 cities mapped in this atlas
जलवायु by state park in Illinois
1 state and provincial parks mapped in this atlas
जलवायु by county in Illinois
1 counties mapped in this atlas
जलवायु by lake in Illinois
1 lakes mapped in this atlas
घूमने का सबसे अच्छा समय Illinois
Go in अगस्त, सितंबर and अक्टूबर. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: जनवरी, फ़रवरी and दिसंबर - expect the least comfortable mix of heat, cold or rain.
What this means for Illinois
Today is slightly warmer than average for अक्टूबर. The forecast high of 23°C is 2.5°C above the 20°C typical for this month.
बारिश is very unlikely today - plans do not need a backup.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in जून से अगस्त.
The gap between the warmest and coldest month averages 29°C.
What से pack, what से skip
- रविglasses, a brimmed hat and SPF 30+
- Layers - the daily swing is 21°C, so mornings feel nothing like afternoons
- A warm mid-layer and gloves for early mornings and evenings
- If your dates are flexible, avoid जनवरी, फ़रवरी and दिसंबर - historically the least comfortable months here.
सारांश
Illinois is a state in संयुक्त राज्य. Illinois is a US state जिसकी राजधानी Springfield. इसकी आबादी लगभग 12.6 million. राजधानी Springfield.
अभी तापमान 14°C (58°F) in Illinois के साथ साफ़ आसमान. महसूस होने वाला तापमान 12°C. आज तापमान 4°C से 23°C. वर्षा की संभावना 0%. Sightseeing conditions score 9.7/10 - उत्कृष्ट — अभी जाएँ.
घूमने का सबसे अच्छा समय Illinois is अगस्त, सितंबर and अक्टूबर. जलवायु continental. जनवरी, फ़रवरी and दिसंबर tend से be the least comfortable months. जुलाई is the warmest month के साथ average highs near 29°C, while जनवरी is the coldest के साथ 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.
सरल शब्दों में। Today is slightly warmer than average for अक्टूबर. The forecast high of 23°C is 2.5°C above the 20°C typical for this month. The best window से be outside is roughly 12 PM से 3 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.
Quick facts about Illinois
| प्रकार | State |
|---|---|
| देश | संयुक्त राज्य |
| महाद्वीप | उत्तरी अमेरिका |
| निर्देशांक | 39°46′54.1″N 89°39′0.4″W (39.7817, -89.6501) |
| Capital | Springfield |
| जनसंख्या | 12.600.000 |
| Area | 149.995 km² |
| Abbreviation | IL |
| समय क्षेत्र | America/Chicago |
| स्थानीय समय | 2:26 PM (UTC-05:00) |
| Best months | अगस्त, सितंबर and अक्टूबर |
| जलवायु | महाद्वीपal |
मौसम map for Illinois
Animated model layers. Pick a layer से load it.
Animated layers by हवाy. For pin-level detail and nearby places, see the interactive map below.
Explore Illinois
Every topic we hold for this place, and the same topic for the places around it.
जलवायु for related places
Frequently asked questions
Where is Illinois?
Illinois is a state in संयुक्त राज्य. Its coordinates are 39.7817, -89.6501. It lies in उत्तरी अमेरिका.
What is the weather like in Illinois अभी?
It is currently 14°C (58°F) के साथ साफ़ आसमान. नमी is 52% and wind is 6 km/h.
When is the best time से visit Illinois?
अगस्त, सितंबर and अक्टूबर offer the most comfortable conditions in Illinois, which has a continental climate. जनवरी, फ़रवरी and दिसंबर 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 2:26 PM.
How many people live in Illinois?
Illinois has a population of approximately 12.6 million.
What is the nearest airport से 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 से 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. |
|---|---|
| पूर्वानुमान and observations | Open-Meteo (ECMWF and national models). |
| वायु गुणवत्ता and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| जलवायु averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National मौसम 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 अक्टूबर 20, 2026 at 2:26 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
