Chicago Ilmasto and Average Sää
Ilmasto of Chicago: average temperatures, rainfall and seasons month by month.
Ilmasto in Chicago month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Kuukausi | Avg high | Avg low | Sadefall | Rating |
|---|---|---|---|---|
| tammikuu | -2° | -8° | 73 mm | ★★☆☆☆ |
| helmikuu | 4° | -4° | 19 mm | ★★★☆☆ |
| maaliskuu | 11° | 1° | 103 mm | ★★★☆☆ |
| huhtikuu | 15° | 6° | 113 mm | ★★★☆☆ |
| tou | 20° | 11° | 68 mm | ★★★★☆ |
| kesäkuu | 26° | 18° | 126 mm | ★★★★☆ |
| heinäkuu | 28° | 20° | 127 mm | ★★★★☆ |
| elokuu | 27° | 19° | 116 mm | ★★★★☆ |
| syyskuu | 24° | 17° | 74 mm | ★★★★☆ |
| lokakuu | 18° | 10° | 79 mm | ★★★★☆ |
| marraskuu | 10° | 3° | 68 mm | ★★★☆☆ |
| joulukuu | 3° | -3° | 68 mm | ★★☆☆☆ |
Ilmasto type: Maanosaal. Lähde: Open-Meteo archive (ERA5).
Recent extremes in Chicago
Korkeaest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Chicago compares ja 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 | 1034 mm |
| Indiana Dunes National Park | 54 km | 11°C | about the same | 1110 mm |
| Starved Rock State Park | 129 km | 12°C | +1°C warmer | 1052 mm |
| Milwaukee | 131 km | 10°C | 1°C cooler | 898 mm |
| Wisconsin | 197 km | 10°C | 2°C cooler | 888 mm |
Ilmasto by airport in Chicago
1 airports mapped in this atlas
Ilmasto by district in Chicago
2 districts and neighborhoods mapped in this atlas
Ilmasto by zip / postal code in Chicago
1 zip and postal codes mapped in this atlas
Ilmasto by area code in Chicago
1 area codes mapped in this atlas
Paras aika vierailla Chicago
Go in tou, kesäkuu, elokuu, syyskuu and lokakuu. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: tammikuu, helmikuu and joulukuu - expect the least comfortable mix of heat, cold or rain.
What this means for Chicago
Today is warmer than average for lokakuu. The forecast high of 23°C is 5.3°C above the 18°C typical for this month.
Sade 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 kesäkuu ja elokuu.
The gap between the warmest and coldest month averages 29°C.
What ja pack, what ja skip
- Layers - the daily swing is 14°C, so mornings feel nothing like afternoons
- If your dates are flexible, avoid tammikuu, helmikuu and joulukuu - historically the least comfortable months here.
Yhteenveto
Chicago is a city in Illinois. Chicago is known for Architecture, deep-dish and lakefront. Väkiluku on noin 2.7 million.
Tällä hetkellä lämpötila on 10°C (49°F) in Chicago ja selkeä. Tuntuu kuin 7°C. Tänään lämpötila vaihtelee 10°C ja 23°C. laeen todennäköisyys on 1%. Sightseeing conditions score 8.7/10 - erinomainen — lähde nyt.
Paras aika matkustaa kohteeseen Chicago is tou, kesäkuu, elokuu, syyskuu and lokakuu. Ilmasto on continental. tammikuu, helmikuu and joulukuu tend ja be the least comfortable months. heinäkuu is the warmest month ja average highs near 28°C, while tammikuu is the coldest ja 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.
Yksinkertaisesti sanottuna. Today is warmer than average for lokakuu. The forecast high of 23°C is 5.3°C above the 18°C typical for this month. The best window ja be outside is roughly 12 PM ja 3 PM, when temperature, rain chance and wind line up best. stargazing is the strongest bet in Chicago 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 Chicago
| Tyyppi | City |
|---|---|
| State | Illinois |
| Maa | Yhdysvallat |
| Maanosa | Pohjois-Amerikka |
| Koordinaatit | 41°52′41.2″N 87°37′47.3″W (41.8781, -87.6298) |
| Väkiluku | 2.700.000 |
| Known for | Architecture, deep-dish and lakefront |
| Paikallinen aika | 3:07 PM (UTC-05:00) |
| Best months | tou, kesäkuu, elokuu, syyskuu and lokakuu |
| Ilmasto | Maanosaal |
Sää map for Chicago
Animated model layers. Pick a layer ja load it.
Animated layers by Tuuliy. 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.
Ilmasto 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 Pohjois-Amerikka.
What is the weather like in Chicago nyt?
It is currently 10°C (49°F) ja selkeä. Kosteus is 80% and wind is 9 km/h.
When is the best time ja visit Chicago?
tou, kesäkuu, elokuu, syyskuu and lokakuu offer the most comfortable conditions in Chicago, which has a continental climate. tammikuu, helmikuu and joulukuu 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 3:07 PM.
How many people live in Chicago?
Chicago has a population of approximately 2.7 million.
What is the nearest airport ja Chicago?
The closest airports are O'Hare International Airport (ORD), 25 km away.
What are the top things ja 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. |
|---|---|
| Ennuste and observations | Open-Meteo (ECMWF and national models). |
| Ilmanlaatu and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Ilmasto averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Sää 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 lokakuu 28, 2026 at 3:07 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
