Decatur weather live forecast

Today's maximum temperature in Decatur is expected to be 6°C. Select a day from the live weather forecast for Decatur, Illinois, USA for more weather parameters.

  • Wednesday
    26th Nov
    Broken clouds
  • Thursday
    27th Nov
    Scattered clouds
  • Friday
    28th Nov
    Scattered clouds
  • Saturday
    29th Nov
    Cloudy with sleet or snow (10-20 mm of rainfall expected)
  • Sunday
    30th Nov
    Cloudy with sleet or snow (0-2 mm of rainfall expected)

5-day weather forecast updated at 04:01 on Wednesday 26th November 2025 GMT

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

Decatur weather forecast by day

Below are the detailed weather forecasts for Decatur for the next 5 days.

Decatur weather for Wednesday 26th November 2025

Expect broken clouds in Decatur, Illinois with a maximum temperature of 6°C, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a strong breeze of 40 kph from the west.

  • 6°C maximum temperature6
    °C maximum temperature
  • -1°C minimum temperature-1
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 0°C wind chill0
    °C wind chill
  • Strong breeze of 40 kph from the West40
    kph wind from W

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Decatur weather for Thursday 27th November 2025

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 1°C, maximum UV of 2 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 25 kph from the north-west.

  • 1°C maximum temperature1
    °C maximum temperature
  • -4°C minimum temperature-4
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • -4°C wind chill-4
    °C wind chill
  • Moderate breeze of 25 kph from the North-West25
    kph wind from NW

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Decatur weather for Friday 28th November 2025

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 0°C, maximum UV of 2 (Low) and 8 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 15 kph from the north-west.

  • 0°C maximum temperature0
    °C maximum temperature
  • -6°C minimum temperature-6
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -4°C wind chill-4
    °C wind chill
  • Gentle breeze of 15 kph from the North-West15
    kph wind from NW

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Decatur weather for Saturday 29th November 2025

Expect cloudy with sleet or snow in Decatur, Illinois with a maximum temperature of 2°C and no hours of bright sunshine. There are 10-20 mm of sleet/snow expected with 96% chance of some sleet or snow and a fresh breeze of 30 kph from the south-east.

  • 2°C maximum temperature2
    °C maximum temperature
  • -2°C minimum temperature-2
    °C minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • No hours of bright sunshine0
    hours of sunshine
  • No UV (maximum) index0
    UV index (None)
  • 96% chance of some sleet or snow96
    % chance of some sleet or snow
  • 10-20 mm of sleet/snow expected<20
    mm of sleet/snow expected
  • -3°C wind chill-3
    °C wind chill
  • Fresh breeze of 30 kph from the South-East30
    kph wind from SE

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Decatur weather for Sunday 30th November 2025

Expect cloudy with sleet or snow in Decatur, Illinois with a maximum temperature of 2°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0-2 mm of sleet/snow expected with 34% chance of some sleet or snow and a moderate breeze of 28 kph from the north-west.

  • 2°C maximum temperature2
    °C maximum temperature
  • -7°C minimum temperature-7
    °C minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 34% chance of some sleet or snow34
    % chance of some sleet or snow
  • 0-2 mm of sleet/snow expected<2
    mm of sleet/snow expected
  • -3°C wind chill-3
    °C wind chill
  • Moderate breeze of 28 kph from the North-West28
    kph wind from NW

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  • Sign up to myTUI. Discount varies by spend. T&Cs apply
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Metric (°C / mm)  |  Imperial (°F / inches)

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