Illinois Klima and Average Vrijeme
Klima of Illinois: average temperatures, rainfall and seasons month by month.
Klima in Illinois month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Mjesec | Avg high | Avg low | Kišafall | Rating |
|---|---|---|---|---|
| siječanj | 1° | -7° | 62 mm | ★★☆☆☆ |
| veljača | 8° | -3° | 20 mm | ★★★☆☆ |
| ožujak | 15° | 4° | 90 mm | ★★★☆☆ |
| travanj | 19° | 9° | 135 mm | ★★★☆☆ |
| svi | 24° | 13° | 100 mm | ★★★★☆ |
| lipanj | 28° | 19° | 117 mm | ★★★★☆ |
| srpanj | 29° | 21° | 129 mm | ★★★★☆ |
| kolovoz | 29° | 19° | 75 mm | ★★★★☆ |
| rujan | 28° | 17° | 33 mm | ★★★★★ |
| listopad | 20° | 10° | 37 mm | ★★★★☆ |
| studeni | 12° | 4° | 79 mm | ★★★☆☆ |
| prosinac | 6° | -2° | 62 mm | ★★☆☆☆ |
Klima type: Kontinental. Izvor: Open-Meteo archive (ERA5).
Recent extremes in Illinois
Visokoest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Illinois compares uz 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 |
Klima by city in Illinois
1 cities mapped in this atlas
Klima by state park in Illinois
1 state and provincial parks mapped in this atlas
Klima by county in Illinois
1 counties mapped in this atlas
Klima by lake in Illinois
1 lakes mapped in this atlas
Najbolje vrijeme za posjet Illinois
Go in kolovoz, rujan and listopad. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: siječanj, veljača and prosinac - expect the least comfortable mix of heat, cold or rain.
What this means for Illinois
Today is slightly warmer than average for listopad. The forecast high of 24°C is 3.6°C above the 20°C typical for this month.
Kiša 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 lipanj do kolovoz.
The gap between the warmest and coldest month averages 29°C.
What do pack, what do skip
- nedglasses, 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 siječanj, veljača and prosinac - historically the least comfortable months here.
Sažetak
Illinois is a state in Sjedinjene Američke Države. Illinois is a US state s glavnim gradom Springfield. Ima oko 12.6 million. Glavni grad je Springfield.
Trenutačno je 18°C (64°F) in Illinois uz vedro. Osjećaj je 15°C. Danas su temperature od 7°C do 24°C. Vjerojatnost oborina je 0%. Sightseeing conditions score 9.7/10 - izvrsno — krenite sada.
Najbolje vrijeme za posjet Illinois is kolovoz, rujan and listopad. Klima je continental. siječanj, veljača and prosinac tend do be the least comfortable months. srpanj is the warmest month uz average highs near 29°C, while siječanj is the coldest uz 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.
Jednostavno rečeno. Today is slightly warmer than average for listopad. The forecast high of 24°C is 3.6°C above the 20°C typical for this month. The best window do be outside is roughly 11 AM do 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.
Quick facts about Illinois
| Vrsta | State |
|---|---|
| Država | Sjedinjene Američke Države |
| Kontinent | Sjeverna Amerika |
| Koordinate | 39°46′54.1″N 89°39′0.4″W (39.7817, -89.6501) |
| Capital | Springfield |
| Stanovništvo | 12.600.000 |
| Area | 149.995 km² |
| Abbreviation | IL |
| Vremenska zona | America/Chicago |
| Lokalno vrijeme | 8:33 AM (UTC-05:00) |
| Best months | kolovoz, rujan and listopad |
| Klima | Kontinental |
Vrijeme map for Illinois
Animated model layers. Pick a layer do load it.
Animated layers by Vjetary. 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.
Klima for related places
Frequently asked questions
Where is Illinois?
Illinois is a state in Sjedinjene Američke Države. Its coordinates are 39.7817, -89.6501. It lies in Sjeverna Amerika.
What is the weather like in Illinois sada?
It is currently 18°C (64°F) uz vedro. Vlažnost is 39% and wind is 8 km/h.
When is the best time do visit Illinois?
kolovoz, rujan and listopad offer the most comfortable conditions in Illinois, which has a continental climate. siječanj, veljača and prosinac 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 8:33 AM.
How many people live in Illinois?
Illinois has a population of approximately 12.6 million.
What is the nearest airport do 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 do 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. |
|---|---|
| Prognoza and observations | Open-Meteo (ECMWF and national models). |
| Kvaliteta zraka 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 Vrijeme 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 listopad 25, 2026 at 8:33 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
