Illinois weather live forecast

Tomorrow's maximum temperature in Illinois is expected to be 8°C.

  • Wednesday
    16th Apr
    Clear skies
  • Thursday
    17th Apr
    Mostly cloudy with light rain (0-2 mm of rainfall expected)
  • Friday
    18th Apr
    Isolated thunderstorms (2-5 mm of rainfall expected)
  • Saturday
    19th Apr
    Broken clouds
  • Sunday
    20th Apr
    Mostly cloudy with rain (10-20 mm of rainfall expected)

5-day weather forecast updated at 04:00 on Wednesday 16th April 2025 GMT

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The 5-day weather forecast for Illinois (Chicago) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

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Below are temperatures expected today at popular countries, regions and places in Illinois. Select a destination to see the detailed weather forecast for today, tomorrow and the outlook for the next five days.

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Illinois weather forecast by day

Below are the detailed weather forecasts for Illinois for the next 5 days. The forecasts shown are for Chicago and may not represent the whole of Illinois. Browse more destinations in Illinois to view more weather forecasts.

Illinois weather for Wednesday 16th April 2025

Expect clear skies in Illinois with a maximum temperature of 8°C, maximum UV of 6 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 4 kph from the east.

  • 8°C maximum temperature8
    °C maximum temperature
  • 5°C minimum temperature5
    °C minimum temperature
  • Clear skies
    clear skies
  • 12 hours of bright sunshine12
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 8°C wind chill8
    °C wind chill
  • Little or no wind of 4 kph from the East4
    kph wind from E

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Illinois weather for Thursday 17th April 2025

Expect mostly cloudy with light rain in Illinois with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 48% chance of some rain and a gentle breeze of 14 kph from the south.

  • 18°C maximum temperature18
    °C maximum temperature
  • 5°C minimum temperature5
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 48% chance of some rain48
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 18°C wind chill18
    °C wind chill
  • Gentle breeze of 14 kph from the South14
    kph wind from S

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Illinois weather for Friday 18th April 2025

Expect isolated thunderstorms in Illinois with a maximum temperature of 23°C, maximum UV of 6 (High) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 69% chance of some rain and a gentle breeze of 14 kph from the south.

  • 23°C maximum temperature23
    °C maximum temperature
  • 11°C minimum temperature11
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 69% chance of some rain69
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 14 kph from the South14
    kph wind from S

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Illinois weather for Saturday 19th April 2025

Expect broken clouds in Illinois with a maximum temperature of 11°C, maximum UV of 6 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the north.

  • 11°C maximum temperature11
    °C maximum temperature
  • 6°C minimum temperature6
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 8 kph from the North8
    kph wind from N

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Illinois weather for Sunday 20th April 2025

Expect mostly cloudy with rain in Illinois with a maximum temperature of 13°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 80% chance of some rain and a light breeze of 11 kph from the east.

  • 13°C maximum temperature13
    °C maximum temperature
  • 6°C minimum temperature6
    °C minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 80% chance of some rain80
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 11 kph from the East11
    kph wind from E

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Metric (°C / mm)  |  Imperial (°F / inches)

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