Chicago, Illinois weather
Current conditions, hourly and 7-day forecast, official alerts, and air quality for Chicago, United States. Coordinates 41.85, -87.65 · America/Chicago.
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Chicago, Illinois
United States · America/Chicago
74°F
Partly cloudy
Feels like 74° · High 82° / Low 65°
- Precipitation
- 0%
- Wind
- 5 SSWmph
- Humidity
- 76%
- Visibility
- 0.0mi
- Pressure
- 1018hPa
- Dew point
- 66°F
- UV index
- 6.9
- Air quality
- 70
Chance of measurable precipitation this hour
Sustained wind speed and direction
How much moisture the air holds
How far you can clearly see
Falling pressure often means unsettled weather
Above 65° feels muggy
8 or higher: limit midday sun
US EPA AQI · Moderate
Source updated: 2:20:37 AM · WeatherSignal checked: 2:20:37 AM
WeatherSignal Right Now
Plain-language answers calculated from this location's own forecast values — see how each one works on our methodology page.
Today's Weather Score
85/100
Excellent day
Starts at 100 and subtracts published penalties for heat, cold, rain, wind, UV, humidity, low visibility, and active official alerts.
- Dew point 66° — muggy-5
- Visibility 0.0 mi-10
Right now
It's 74°, partly cloudy, 76% humidity.
Today's high is 4° cooler than the average of the next 6 days.
Umbrella or nah?
Nah(Favourable)
Nothing in the next 12 hours reaches a 40% chance of rain. Peak chance is 0%.
Why
- Peak precipitation probability: 0%
- Total expected precipitation: 0.00″
Best time today
9 AM(Favourable)
9 AM has the most comfortable combination of temperature, rain chance, wind, and humidity in the remaining daylight hours.
Why
- Feels like 70°
- Rain chance 0%
- Wind 8 mph
- Humidity 77%
Car wash check
Go for it(Favourable)
No hour in the next 48 hours reaches a 50% chance of rain or measurable precipitation.
Why
- No precipitation at or above 50% chance within 48 hours
- Current wind: 5 mph
Dog walk window
11 PM(Favourable)
11 PM is the calmest hour in the 25–85° feels-like range with rain chance under 40%.
Why
- Feels like 70°
- Rain chance 0%
Cookout check
Green light(Favourable)
Between 4 PM and 9 PM: up to 0% rain chance, wind to 11 mph, feels like 73–82°.
Why
- Evening peak rain chance: 0%
- Evening peak wind: 11 mph
Windows down?
Roll 'em down(Favourable)
Feels like 74°, 0% rain chance, wind 5 mph. Comfortable range used here: 58–84° with rain chance under 20% and wind under 18 mph.
Why
- Feels like 74°
- Rain chance 0%
- Wind 5 mph
Hair weather
Frizz risk high(Unfavourable)
Relative humidity is 76% with a 66° dew point. Moisture in the air is what swells hair strands, so dew point matters more than temperature.
Why
- Humidity 76%
- Dew point 66°
These are WeatherSignal calculations, not official forecasts or warnings. They never override guidance from your national weather service.
What this means
Generated from the forecast values above using fixed rules — not an AI guess.
- No significant precipitation is expected in the next 24 hours.
- Heat builds to 95°F on Wednesday.
Next 24 hours
Will it rain during your commute? When does the storm arrive?
| Time | Condition | Temp | Feels | Precip % | Amount | Wind | Humidity |
|---|---|---|---|---|---|---|---|
| 9 PM | Mainly clear | 73° | 73° | 0% | 0.00″ | 6 SW | 77% |
| 10 PM | Clear sky | 71° | 71° | 0% | 0.00″ | 6 SW | 80% |
| 11 PM | Clear sky | 70° | 70° | 0% | 0.00″ | 6 SW | 79% |
| 12 AM | Partly cloudy | 69° | 69° | 0% | 0.00″ | 6 SW | 78% |
| 1 AM | Mainly clear | 69° | 69° | 0% | 0.00″ | 7 SW | 79% |
| 2 AM | Partly cloudy | 68° | 68° | 0% | 0.00″ | 7 SSW | 81% |
| 3 AM | Partly cloudy | 67° | 67° | 0% | 0.00″ | 7 SSW | 81% |
| 4 AM | Partly cloudy | 66° | 66° | 0% | 0.00″ | 7 SSW | 80% |
| 5 AM | Clear sky | 65° | 65° | 0% | 0.00″ | 7 SSW | 81% |
| 6 AM | Partly cloudy | 65° | 65° | 0% | 0.00″ | 6 SSW | 81% |
| 7 AM | Partly cloudy | 66° | 66° | 0% | 0.00″ | 7 SSW | 81% |
| 8 AM | Partly cloudy | 68° | 68° | 0% | 0.00″ | 7 SSW | 81% |
| 9 AM | Partly cloudy | 70° | 70° | 0% | 0.00″ | 8 SSW | 77% |
| 10 AM | Partly cloudy | 74° | 74° | 0% | 0.00″ | 8 SSW | 71% |
| 11 AM | Partly cloudy | 77° | 77° | 0% | 0.00″ | 8 SSW | 63% |
| 12 PM | Partly cloudy | 80° | 82° | 0% | 0.00″ | 9 SSW | 50% |
| 1 PM | Partly cloudy | 82° | 82° | 0% | 0.00″ | 9 SW | 47% |
| 2 PM | Partly cloudy | 82° | 82° | 0% | 0.00″ | 10 SSW | 46% |
| 3 PM | Overcast | 82° | 83° | 0% | 0.00″ | 10 SSW | 46% |
| 4 PM | Overcast | 81° | 82° | 0% | 0.00″ | 11 SSW | 48% |
| 5 PM | Overcast | 80° | 81° | 0% | 0.00″ | 10 SSW | 52% |
| 6 PM | Partly cloudy | 78° | 78° | 0% | 0.00″ | 9 SSW | 57% |
| 7 PM | Partly cloudy | 78° | 78° | 0% | 0.00″ | 9 S | 60% |
| 8 PM | Partly cloudy | 76° | 76° | 0% | 0.00″ | 9 S | 64% |
7-day forecast
Confidence decreases the further out you look.
Today
Partly cloudy
82° / 65°
- Precip:
- 0% · 0.00″
- Wind:
- 11 mph
- UV:
- 6.9
- Sun:
- 1 AM–1 PM
Sun, Aug 30
Partly cloudy
84° / 70°
- Precip:
- 0% · 0.01″
- Wind:
- 15 mph
- UV:
- 6.8
- Sun:
- 1 AM–1 PM
Mon, Aug 31
Partly cloudy
86° / 73°
- Precip:
- 0% · 0.00″
- Wind:
- 11 mph
- UV:
- 6.9
- Sun:
- 1 AM–1 PM
Tue, Sep 1
Clear sky
87° / 76°
- Precip:
- 0% · 0.00″
- Wind:
- 8 mph
- UV:
- 0.0
- Sun:
- 1 AM–1 PM
Wed, Sep 2
Clear sky
95° / 74°
- Precip:
- 0% · 0.00″
- Wind:
- 8 mph
- UV:
- 0.0
- Sun:
- 1 AM–1 PM
Lower confidence — long-range outlook, not a certainty.
Thu, Sep 3
Clear sky
84° / 76°
- Precip:
- 0% · 0.00″
- Wind:
- 9 mph
- UV:
- 0.0
- Sun:
- 1 AM–1 PM
Lower confidence — long-range outlook, not a certainty.
Fri, Sep 4
Clear sky
81° / 73°
- Precip:
- 0% · 0.00″
- Wind:
- 7 mph
- UV:
- 0.0
- Sun:
- 1 AM–1 PM
Lower confidence — long-range outlook, not a certainty.
Forecasts describe likely conditions, not guaranteed outcomes. Official warnings from your national weather service always take precedence over anything shown here.
Air quality
US EPA AQI · Moderate
- AQI
- 70
- Primary
- Ozone
- PM2.5
- 18.8µg/m³
- PM10
- 19.0µg/m³
- Ozone
- 67.0µg/m³
- Dust
- 0.0µg/m³
Moderate
Highest measured pollutant
Unusually sensitive people should consider shortening intense outdoor activity.
Air-quality guidance comes from the published category definitions of the source scale. WeatherSignal does not provide medical advice.
Source updated: not provided · WeatherSignal checked: 2:20:37 AM