Decatur weather live forecast

Today's maximum temperature in Decatur is expected to be 12°C. Select a day from the live weather forecast for Decatur, Illinois, USA for more weather parameters.

  • Tuesday
    25th Nov
    Mostly cloudy with rain (5-10 mm of rainfall expected)
  • Wednesday
    26th Nov
    Broken clouds
  • Thursday
    27th Nov
    Scattered clouds
  • Friday
    28th Nov
    Clear skies with flurries of snow (0-2 cm of snow expected)
  • Saturday
    29th Nov
    Cloudy with sleet or snow (30-40 cm of snow expected)

5-day weather forecast updated at 04:01 on Tuesday 25th 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 Tuesday 25th November 2025

Expect mostly cloudy with rain in Decatur, Illinois with a maximum temperature of 12°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 5-10 mm of rainfall expected with 37% chance of some rain and a fresh breeze of 29 kph from the west.

  • 12°C maximum temperature12
    °C maximum temperature
  • 7°C minimum temperature7
    °C minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 37% chance of some rain37
    % chance of some rain
  • 5-10 mm of rainfall expected<10
    mm of rainfall expected
  • 12°C wind chill12
    °C wind chill
  • Fresh breeze of 29 kph from the West29
    kph wind from W

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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 5 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 37 kph from the west.

  • 6°C maximum temperature6
    °C maximum temperature
  • -2°C minimum temperature-2
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 5 hours of bright sunshine5
    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
  • Fresh breeze of 37 kph from the West37
    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 7 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
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • -5°C wind chill-5
    °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 clear skies with flurries of snow in Decatur, Illinois with a maximum temperature of 0°C, maximum UV of 2 (Low) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 40% chance of some snow and a gentle breeze of 13 kph from the north-west.

  • 0°C maximum temperature0
    °C maximum temperature
  • -6°C minimum temperature-6
    °C minimum temperature
  • Clear skies with flurries of snow
    clear skies with flurries of snow
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 40% chance of some snow40
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -4°C wind chill-4
    °C wind chill
  • Gentle breeze of 13 kph from the North-West13
    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 0°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 30-40 cm of snow expected with 83% chance of some snow and a moderate breeze of 25 kph from the south-east.

  • 0°C maximum temperature0
    °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
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 83% chance of some snow83
    % chance of some snow
  • 30-40 cm of snow expected<40
    cm of snow expected
  • -6°C wind chill-6
    °C wind chill
  • Moderate breeze of 25 kph from the South-East25
    kph wind from SE

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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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