Chicago Klima and Average Vejr
Klima of Chicago: average temperatures, rainfall and seasons month by month.
Klima in Chicago month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Måned | Avg high | Avg low | Regnfall | Rating |
|---|---|---|---|---|
| januar | -2° | -8° | 73 mm | ★★☆☆☆ |
| februar | 4° | -4° | 19 mm | ★★★☆☆ |
| marts | 11° | 1° | 103 mm | ★★★☆☆ |
| april | 15° | 6° | 113 mm | ★★★☆☆ |
| maj | 20° | 11° | 68 mm | ★★★★☆ |
| juni | 26° | 18° | 126 mm | ★★★★☆ |
| juli | 28° | 20° | 127 mm | ★★★★☆ |
| august | 27° | 19° | 87 mm | ★★★★☆ |
| september | 24° | 16° | 92 mm | ★★★★☆ |
| oktober | 18° | 10° | 79 mm | ★★★★☆ |
| november | 10° | 3° | 68 mm | ★★★☆☆ |
| december | 3° | -3° | 68 mm | ★★☆☆☆ |
Klima type: Kontinental. Kilde: Open-Meteo archive (ERA5).
Recent extremes in Chicago
Højest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Chicago compares med nearby places
Annual averages, and the difference against Chicago.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Cook County | 0 km | 11°C | about the same | 1023 mm |
| Indiana Dunes National Park | 54 km | 11°C | about the same | 1072 mm |
| Starved Rock State Park | 129 km | 12°C | +1°C warmer | 1018 mm |
| Milwaukee | 131 km | 10°C | 1°C cooler | 873 mm |
| Wisconsin | 197 km | 10°C | 2°C cooler | 838 mm |
Klima by airport in Chicago
1 airports mapped in this atlas
Klima by district in Chicago
2 districts and neighborhoods mapped in this atlas
Klima by zip / postal code in Chicago
1 zip and postal codes mapped in this atlas
Klima by area code in Chicago
1 area codes mapped in this atlas
Bedste rejsetid Chicago
Go in maj, juni, august, september and oktober. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: januar, februar and december - expect the least comfortable mix of heat, cold or rain.
What this means for Chicago
Today is about average for september. The forecast high of 25°C is in line med the 24°C typical for this month.
A 46% chance means rain is likely somewhere nearby at some point - carry a layer, but do not cancel. Around 29 mm is forecast, which is enough og soak trails and slow traffic.
Vindstød og 56 km/h will push high-sided vehicles on exposed roads and bridges.
Northern Hemisphere, so peak summer falls in juni og august.
The gap between the warmest and coldest month averages 29°C.
What og pack, what og skip
- sønglasses, a brimmed hat and SPF 30+
- A packable rain shell - 4 of the next 7 days carry a real chance of rain
- Avoid exposed ridgelines, small boats and rooftop viewpoints while gusts stay above 56 km/h.
- If your dates are flexible, avoid januar, februar and december - historically the least comfortable months here.
Resumé
Chicago is a city in Illinois. Chicago is known for Architecture, deep-dish and lakefront. Der bor omkring 2.7 million.
Lige nu er det 18°C (64°F) in Chicago med overskyet. Det føles som 15°C. I dag ligger temperaturen mellem 17°C og 25°C. Sandsynligheden for nedbør er 46%. Sightseeing conditions score 8.2/10 - gode forhold.
Det bedste tidspunkt at besøge Chicago is maj, juni, august, september and oktober. Klimaet er continental. januar, februar and december tend og be the least comfortable months. juli is the warmest month med average highs near 28°C, while januar is the coldest med lows near -8°C.
The closest major airport is O'Hare International Airport (ORD), about 25 km away. Nearby highlights include Indiana Dunes National Park, Starved Rock State Park and Lake Michigan.
Kort sagt. Today is about average for september. The forecast high of 25°C is in line med the 24°C typical for this month. The best window og be outside is roughly 4 PM og 7 PM, when temperature, rain chance and wind line up best. fishing is the strongest bet in Chicago today at 8.9/10. Vindstød og 56 km/h will push high-sided vehicles on exposed roads and bridges.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Chicago
| Type | City |
|---|---|
| State | Illinois |
| Land | USA |
| Kontinent | Nordamerika |
| Koordinater | 41°52′41.2″N 87°37′47.3″W (41.8781, -87.6298) |
| Befolkning | 2.700.000 |
| Known for | Architecture, deep-dish and lakefront |
| Lokal tid | 5:40 AM (UTC-05:00) |
| Best months | maj, juni, august, september and oktober |
| Klima | Kontinental |
Vejr map for Chicago
Animated model layers. Pick a layer og load it.
Animated layers by Vindy. For pin-level detail and nearby places, see the interactive map below.
Explore Chicago
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 Chicago?
Chicago is a city in Illinois. Its coordinates are 41.8781, -87.6298. It lies in Nordamerika.
What is the weather like in Chicago lige nu?
It is currently 18°C (64°F) med overskyet. Luftfugtighed is 65% and wind is 18 km/h.
When is the best time og visit Chicago?
maj, juni, august, september and oktober offer the most comfortable conditions in Chicago, which has a continental climate. januar, februar and december are usually the hardest months for outdoor plans.
What time zone is Chicago in?
Chicago observes America/Chicago (UTC-05:00). The local time is 5:40 AM.
How many people live in Chicago?
Chicago has a population of approximately 2.7 million.
What is the nearest airport og Chicago?
The closest airports are O'Hare International Airport (ORD), 25 km away.
What are the top things og do in Chicago?
Popular options include Indiana Dunes National Park, Starved Rock State Park and Lake Michigan.
What places are in Chicago?
Chicago covers 5 places in this atlas, including O'Hare International Airport, The Loop, Wicker Park, ZIP Code 60601 and Area Code 312.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (cities-us) - coordinates, hierarchy and facts. |
|---|---|
| Prognose and observations | Open-Meteo (ECMWF and national models). |
| Luftkvalitet 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 Vejr 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 september 15, 2026 at 5:40 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
