Illinois weather forecast

Get the latest coronavirus (Covid-19) updates for Illinois with current travel advice and statistics on new cases per 100,000 and vaccine.

Below are temperatures expected tomorrow at popular destinations in Illinois. Select a destination to see the 5-day weather forecast.

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

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 28th July 2021

Below is the Illinois weather forecast for Wednesday 28th July 2021. Expect isolated thunderstorms in Illinois with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 2-5 mm of rainfall expected with 43% chance of some rain and a light breeze of 11 kph from the west.

  • 30°C maximum temperature30
    °C maximum temperature
  • 23°C minimum temperature23
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 43% chance of some rain43
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Light breeze of 11 kph from the West11
    kph wind from W

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Illinois weather for Thursday 29th July 2021

Below is the Illinois weather forecast for Thursday 29th July 2021. Expect isolated thunderstorms in Illinois with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 10-20 mm of rainfall expected with 58% chance of some rain and a moderate breeze of 25 kph from the north.

  • 30°C maximum temperature30
    °C maximum temperature
  • 20°C minimum temperature20
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 58% chance of some rain58
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Moderate breeze of 25 kph from the North25
    kph wind from N

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Illinois weather for Friday 30th July 2021

Below is the Illinois weather forecast for Friday 30th July 2021. Expect scattered clouds in Illinois with a maximum temperature of 23°C, maximum UV of 7 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the north-east.

  • 23°C maximum temperature23
    °C maximum temperature
  • 18°C minimum temperature18
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 23°C wind chill23
    °C wind chill
  • Moderate breeze of 21 kph from the North-East21
    kph wind from NE

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Illinois weather for Saturday 31st July 2021

Below is the Illinois weather forecast for Saturday 31st July 2021. Expect isolated thunderstorms in Illinois with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 6 (High) and 12 hours of bright sunshine. There are 2-5 mm of rainfall expected with 58% chance of some rain and a gentle breeze of 13 kph from the south-west.

  • 28°C maximum temperature28
    °C maximum temperature
  • 17°C minimum temperature17
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 12 hours of bright sunshine12
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 58% chance of some rain58
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Gentle breeze of 13 kph from the South-West13
    kph wind from SW

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Illinois weather for Sunday 1st August 2021

Below is the Illinois weather forecast for Sunday 1st August 2021. Expect isolated thunderstorms in Illinois with a maximum temperature of 23°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 58% chance of some rain and a gentle breeze of 19 kph from the north.

  • 23°C maximum temperature23
    °C maximum temperature
  • 19°C minimum temperature19
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 58% chance of some rain58
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 19 kph from the North19
    kph wind from N

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  • Save 20% on COVID-19 Fit to Fly test & travel certificate
  • Home COVID-19 PCR test with free express delivery
  • Receive online results within 24-72 hours once test at lab
Show discount codeShow discount code ******VEL

Expires at 23:59 on Friday 31st Dec 2021

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

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