Illinois Weather Forecast

Check the Illinois weather forecast for the next 5 days before you head off on holiday. The 5-day forecast shows the prevailing weather conditions, maximum & minimum temperatures, hours of sunshine per day, wind speed & direction and more. Tomorrow's maximum temperature in Illinois is expected to be 31°C. The weather forecast shown below is for Chicago.

Illinois: 5-day weather forecast

Click on a symbol below to see the daily forecast in detail.

Last updated at 04:07 on Sunday 24th September 2017 GMT

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

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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 Sunday 24th September 2017

Below is the Illinois weather forecast for Sunday 24th September 2017. Expect clear skies in Illinois with a maximum temperature of 31°C, moderate levels of heat & humidity and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south-east.

  • 31
    °C maximum temperature
  • 21
    °C minimum temperature
  • clear skies
  • 11
    hours of sunshine
  • 0
    mm of rainfall expected
  • M
    moderate heat & humidity
  • 12
    kph wind from SE

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Illinois weather for Monday 25th September 2017

Below is the Illinois weather forecast for Monday 25th September 2017. Expect clear skies in Illinois with a maximum temperature of 30°C, moderate levels of heat & humidity and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south.

  • 30
    °C maximum temperature
  • 20
    °C minimum temperature
  • clear skies
  • 11
    hours of sunshine
  • 0
    mm of rainfall expected
  • M
    moderate heat & humidity
  • 11
    kph wind from S

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Illinois weather for Tuesday 26th September 2017

Below is the Illinois weather forecast for Tuesday 26th September 2017. Expect scattered clouds in Illinois with a maximum temperature of 29°C, moderate levels of heat & humidity and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the south.

  • 29
    °C maximum temperature
  • 20
    °C minimum temperature
  • scattered clouds
  • 7
    hours of sunshine
  • 0
    mm of rainfall expected
  • L
    low heat & humidity
  • 16
    kph wind from S

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Illinois weather for Wednesday 27th September 2017

Below is the Illinois weather forecast for Wednesday 27th September 2017. Expect broken clouds in Illinois with a maximum temperature of 22°C and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 25 kph from the north-west.

  • 22
    °C maximum temperature
  • 15
    °C minimum temperature
  • broken clouds
  • 5
    hours of sunshine
  • 0
    mm of rainfall expected
  • 0
    no heat & humidity
  • 25
    kph wind from NW

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Illinois weather for Thursday 28th September 2017

Below is the Illinois weather forecast for Thursday 28th September 2017. Expect scattered clouds in Illinois with a maximum temperature of 20°C and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the north-west.

  • 20
    °C maximum temperature
  • 13
    °C minimum temperature
  • scattered clouds
  • 8
    hours of sunshine
  • 0
    mm of rainfall expected
  • 0
    no heat & humidity
  • 14
    kph wind from NW

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Illinois weather by month

Check Illinois weather for a particular month by selecting from the list below. Monthly weather guides include figures for temperature, rainfall, sunshine hours and sea temperature plus daily sunrise & sunset times.

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