Illinois Климат and Average Погода
Климат of Illinois: average temperatures, rainfall and seasons month by month.
Климат in Illinois month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Месяц | Avg high | Avg low | Дождьfall | Rating |
|---|---|---|---|---|
| январь | 1° | -7° | 62 mm | ★★☆☆☆ |
| февраль | 8° | -3° | 20 mm | ★★★☆☆ |
| март | 15° | 4° | 90 mm | ★★★☆☆ |
| апрель | 19° | 9° | 135 mm | ★★★☆☆ |
| май | 24° | 13° | 100 mm | ★★★★☆ |
| июнь | 28° | 19° | 117 mm | ★★★★☆ |
| июль | 29° | 21° | 129 mm | ★★★★☆ |
| август | 28° | 19° | 47 mm | ★★★★☆ |
| сентябрь | 27° | 16° | 42 mm | ★★★★☆ |
| октябрь | 20° | 10° | 37 mm | ★★★★☆ |
| ноябрь | 12° | 4° | 79 mm | ★★★☆☆ |
| декабрь | 6° | -2° | 62 mm | ★★☆☆☆ |
Климат type: Континентal. Источник: Open-Meteo archive (ERA5).
Recent extremes in Illinois
Высокийest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Illinois compares и 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 |
Климат by city in Illinois
1 cities mapped in this atlas
Климат by state park in Illinois
1 state and provincial parks mapped in this atlas
Климат by county in Illinois
1 counties mapped in this atlas
Климат by lake in Illinois
1 lakes mapped in this atlas
Лучшее время для посещения Illinois
Go in август, сентябрь and октябрь. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: январь, февраль and декабрь - expect the least comfortable mix of heat, cold or rain.
What this means for Illinois
Today is about average for август. The forecast high of 27°C is in line и the 28°C typical for this month.
Дождь 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 июнь до август.
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
- всglasses, a brimmed hat and SPF 30+
- If your dates are flexible, avoid январь, февраль and декабрь - historically the least comfortable months here.
Краткое содержание
Illinois is a state in Соединенные Штаты. Illinois is a US state со столицей Springfield. Население составляет около 12.6 million. Столица — Springfield.
Сейчас температура 19°C (67°F) in Illinois и Ясно. Ощущается как 19°C. Сегодня температура от 16°C до 27°C. Вероятность осадков — 0%. Sightseeing conditions score 9.8/10 - Отлично — можно отправляться.
Лучшее время для посещения Illinois is август, сентябрь and октябрь. Климат — continental. январь, февраль and декабрь tend до be the least comfortable months. июль is the warmest month и average highs near 29°C, while январь is the coldest и 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.
Проще говоря. Today is about average for август. The forecast high of 27°C is in line и 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 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
| Тип | State |
|---|---|
| Страна | Соединенные Штаты |
| Континент | Северная Америка |
| Координаты | 39°46′54.1″N 89°39′0.4″W (39.7817, -89.6501) |
| Capital | Springfield |
| Население | 12.600.000 |
| Area | 149.995 km² |
| Abbreviation | IL |
| Часовой пояс | America/Chicago |
| Местное время | 9:41 PM (UTC-05:00) |
| Best months | август, сентябрь and октябрь |
| Климат | Континентal |
Погода map for Illinois
Animated model layers. Pick a layer до load it.
Animated layers by Ветерy. 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.
Климат for related places
Frequently asked questions
Where is Illinois?
Illinois is a state in Соединенные Штаты. Its coordinates are 39.7817, -89.6501. It lies in Северная Америка.
What is the weather like in Illinois сейчас?
It is currently 19°C (67°F) и Ясно. Влажность is 68% and wind is 7 km/h.
When is the best time до visit Illinois?
август, сентябрь and октябрь offer the most comfortable conditions in Illinois, which has a continental climate. январь, февраль and декабрь 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 9:41 PM.
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). |
| Качество воздуха and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Климат 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 август 23, 2026 at 9:41 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
