Decatur weather live forecast

Today's maximum temperature in Decatur is expected to be 2°C. Select a day from the live weather forecast for Decatur, Illinois, USA for more weather parameters.

5-day weather forecast updated at 04:01 on Thursday 27th 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 Thursday 27th November 2025

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 2°C, maximum UV of 2 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the north-west.

  • 2°C maximum temperature2
    °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
  • -3°C wind chill-3
    °C wind chill
  • Moderate breeze of 24 kph from the North-West24
    kph wind from NW

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Decatur weather for Friday 28th November 2025

Expect broken 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 17 kph from the north-west.

  • 0°C maximum temperature0
    °C maximum temperature
  • -4°C minimum temperature-4
    °C minimum temperature
  • Broken clouds
    broken 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
  • -5°C wind chill-5
    °C wind chill
  • Gentle breeze of 17 kph from the North-West17
    kph wind from NW

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Decatur weather for Saturday 29th November 2025

Expect cloudy with some snow in Decatur, Illinois with a maximum temperature of 0°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 10-20 cm of snow expected with 100% chance of some snow and a fresh breeze of 30 kph from the south-east.

  • 0°C maximum temperature0
    °C maximum temperature
  • -2°C minimum temperature-2
    °C minimum temperature
  • Cloudy with some snow
    cloudy with some snow
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 100% chance of some snow100
    % chance of some snow
  • 10-20 cm of snow expected<20
    cm of snow expected
  • -6°C wind chill-6
    °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 mostly cloudy with light snow in Decatur, Illinois with a maximum temperature of 0°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 0-2 cm of snow expected with 20% chance of some snow and a fresh breeze of 31 kph from the north-west.

  • 0°C maximum temperature0
    °C maximum temperature
  • -8°C minimum temperature-8
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 20% chance of some snow20
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -6°C wind chill-6
    °C wind chill
  • Fresh breeze of 31 kph from the North-West31
    kph wind from NW

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Decatur weather for Monday 1st December 2025

Expect clear skies with flurries of snow in Decatur, Illinois with a maximum temperature of -7°C, maximum UV of 2 (Low) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 33% chance of some snow and a gentle breeze of 15 kph from the north.

  • -7°C maximum temperature-7
    °C maximum temperature
  • -13°C minimum temperature-13
    °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)
  • 33% chance of some snow33
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -13°C wind chill-13
    °C wind chill
  • Gentle breeze of 15 kph from the North15
    kph wind from N

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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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