Illinois Клімат and Average Погода
Клімат of Illinois: average temperatures, rainfall and seasons month by month.
Клімат in Illinois month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Місяць | Avg high | Avg low | Дощfall | Rating |
|---|---|---|---|---|
| січень | 1° | -7° | 62 mm | ★★☆☆☆ |
| лютий | 8° | -3° | 20 mm | ★★★☆☆ |
| березень | 15° | 4° | 90 mm | ★★★☆☆ |
| квітень | 19° | 9° | 135 mm | ★★★☆☆ |
| тра | 24° | 13° | 100 mm | ★★★★☆ |
| червень | 28° | 19° | 117 mm | ★★★★☆ |
| липень | 29° | 21° | 129 mm | ★★★★☆ |
| серпень | 28° | 19° | 47 mm | ★★★★☆ |
| вересень | 27° | 16° | 42 mm | ★★★★☆ |
| жовтень | 20° | 10° | 37 mm | ★★★★☆ |
| листопад | 12° | 4° | 79 mm | ★★★☆☆ |
| грудень | 6° | -2° | 62 mm | ★★☆☆☆ |
Клімат type: Континентal. Джерело: Open-Meteo archive (ERA5).
Recent extremes in Illinois
Високийest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Illinois compares з 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 | 1144 mm |
| St. Louis | 137 km | 15°C | +1°C warmer | 1144 mm |
| Missouri | 255 km | 14°C | +1°C warmer | 1002 mm |
| Indianapolis | 298 km | 13°C | 1°C cooler | 1094 mm |
| Indiana | 298 km | 13°C | 1°C cooler | 1094 mm |
Клімат by city in Illinois
1 cities mapped in this atlas
Клімат by state park in Illinois
1 state and provincial parks mapped in this atlas
Клімат by county in Illinois
1 counties mapped in this atlas
Клімат by lake in Illinois
1 lakes mapped in this atlas
Найкращий час для відвідування Illinois
Go in серпень, вересень and жовтень. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: січень, лютий and грудень - expect the least comfortable mix of heat, cold or rain.
What this means for Illinois
Today is slightly cooler than average for серпень. The forecast high of 27°C is 1.5°C below the 28°C typical for this month.
Дощ 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 червень до серпень.
The gap between the warmest and coldest month averages 29°C.
What до pack, what до skip
- Lightweight, light-coloured clothing and a refillable water bottle
- ндglasses, a brimmed hat and SPF 30+
- If your dates are flexible, avoid січень, лютий and грудень - historically the least comfortable months here.
Підсумок
Illinois is a state in Сполучені Штати. Illinois is a US state зі столицею Springfield. Населення становить близько 12.6 million. Столиця — Springfield.
Зараз 20°C (68°F) in Illinois з Ясно. Відчувається як 21°C. Сьогодні температура від 12°C до 27°C. Ймовірність опадів становить 6%. Sightseeing conditions score 9.7/10 - Чудово — вирушайте зараз.
Найкращий час для відвідування Illinois is серпень, вересень and жовтень. Клімат — continental. січень, лютий and грудень tend до be the least comfortable months. липень is the warmest month з average highs near 29°C, while січень is the coldest з 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.
Простіше кажучи. Today is slightly cooler than average for серпень. The forecast high of 27°C is 1.5°C below the 28°C typical for this month. The best window до be outside is roughly 8 AM до 11 AM, when temperature, rain chance and wind line up best. stargazing is the strongest bet in Illinois today at 9.8/10. 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
| Тип | State |
|---|---|
| Країна | Сполучені Штати |
| Континент | Північна Америка |
| Координати | 39°46′54.1″N 89°39′0.4″W (39.7817, -89.6501) |
| Capital | Springfield |
| Населення | 12.600.000 |
| Area | 149.995 km² |
| Abbreviation | IL |
| Часовий пояс | America/Chicago |
| Місцевий час | 12:06 AM (UTC-05:00) |
| Best months | серпень, вересень and жовтень |
| Клімат | Континентal |
Погода map for Illinois
Animated model layers. Pick a layer до load it.
Animated layers by Вітерy. 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.
Клімат for related places
Frequently asked questions
Where is Illinois?
Illinois is a state in Сполучені Штати. Its coordinates are 39.7817, -89.6501. It lies in Північна Америка.
What is the weather like in Illinois зараз?
It is currently 20°C (68°F) з Ясно. Вологість is 71% and wind is 5 km/h.
When is the best time до visit Illinois?
серпень, вересень and жовтень offer the most comfortable conditions in Illinois, which has a continental climate. січень, лютий and грудень 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 12:06 AM.
How many people live in Illinois?
Illinois has a population of approximately 12.6 million.
What is the nearest airport до 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 до 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. |
|---|---|
| Прогноз and observations | Open-Meteo (ECMWF and national models). |
| Якість повітря and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Клімат averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Погода 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 серпень 25, 2026 at 12:06 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
