Illinois Veður Spá
Illinois weather: 13°C, clear. Á klukkustund forecast, 14-day outlook, UV, air quality and the best time til visit.
14-day forecast for Illinois
Hæst / Lægst; Úrkoma; UV
| Dagur | Aðstæður | Hæst / Lægst | Úrkoma | Vindur | UV |
|---|---|---|---|---|---|
| þri., okt 27 | ☁️ Skýjað | 23° / 9° | 13% | 17 km/h | 4 |
| mið., okt 28 | ☁️ Skýjað | 26° / 11° | 2% | 20 km/h | 4 |
| fim., okt 29 | ⛅ Skýjað að hluta | 27° / 15° | 6% · 0 mm | 16 km/h | 4 |
| fös., okt 30 | 🌦️ Drizzle | 23° / 13° | 21% · 1 mm | 19 km/h | 4 |
| lau., okt 31 | 🌦️ Lítil rigning | 20° / 15° | 19% · 2 mm | 16 km/h | 1 |
| sun., nóv 1 | 🌧️ Rigning | 17° / 14° | 45% · 12 mm | 21 km/h | 1 |
| mán., nóv 2 | 🌦️ Light drizzle | 17° / 13° | 44% · 0 mm | 14 km/h | 2 |
| þri., nóv 3 | 🌧️ Skúrir | 16° / 8° | 52% · 39 mm | 37 km/h | 1 |
| mið., nóv 4 | 🌦️ Light drizzle | 10° / 8° | 37% · 2 mm | 22 km/h | 1 |
| fim., nóv 5 | ☁️ Skýjað | 16° / 9° | 20% | 16 km/h | 3 |
| fös., nóv 6 | 🌦️ Light drizzle | 14° / 9° | 10% · 2 mm | 20 km/h | 2 |
| lau., nóv 7 | 🌦️ Light drizzle | 9° / 6° | 9% · 2 mm | 21 km/h | 1 |
| sun., nóv 8 | ☁️ Skýjað | 10° / 2° | 7% | 14 km/h | 3 |
| mán., nóv 9 | ☁️ Skýjað | 15° / 2° | 17% | 28 km/h | 3 |
The two-week trend
Cooling. The second half of the window averages 8°C cooler than the days immediately ahead.
The window averages 17°C against a október normal of 20°C - 3°C below.
Rigningfall over the next 7 days is close til normal for október (16 mm against a typical 9 mm).
What this means for Illinois
Today is slightly warmer than average for október. The forecast high of 23°C is 2.4°C above the 20°C typical for this month.
A 13% chance means most of the area stays dry; a passing shower is possible but short.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in júní til ágúst.
The gap between the warmest and coldest month averages 29°C.
What til pack, what til skip
- sun.glasses, a brimmed hat and SPF 30+
- Layers - the daily swing is 18°C, so mornings feel nothing like afternoons
- A packable rain shell - 2 of the next 7 days carry a real chance of rain
- If your dates are flexible, avoid janúar, febrúar and desember - historically the least comfortable months here.
Sjá spá fyrir Illinois eftir tímabili
Illinois weather - more answers
Explore Illinois
Every topic we hold for this place, and the same topic for the places around it.
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Frequently asked questions
Where is Illinois?
Illinois is a state in Bandaríkin. Its coordinates are 39.7817, -89.6501. It lies in Norður-Ameríka.
What is the weather like in Illinois núna?
It is currently 13°C (56°F) með clear. Raki is 70% and wind is 8 km/h.
When is the best time til visit Illinois?
ágúst, september and október offer the most comfortable conditions in Illinois, which has a continental climate. janúar, febrúar and desember 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 2:42 AM.
How many people live in Illinois?
Illinois has a population of approximately 12.6 million.
What is the nearest airport til 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 til 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. |
|---|---|
| Spá and observations | Open-Meteo (ECMWF and national models). |
| Loftgæði and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Loftslag averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Veður 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 október 28, 2026 at 2:42 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
