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.

  • Monday
    24th Nov
    Mostly cloudy with light rain (2-5 mm of rainfall expected)
  • Tuesday
    25th Nov
    Mostly cloudy with light rain (2-5 mm of rainfall expected)
  • Wednesday
    26th Nov
    Broken clouds
  • Thursday
    27th Nov
    Scattered clouds
  • Friday
    28th Nov
    Broken clouds

5-day weather forecast updated at 04:01 on Monday 24th 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 Monday 24th November 2025

Expect mostly cloudy with light rain in Decatur, Illinois with a maximum temperature of 12°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 2-5 mm of rainfall expected with 53% chance of some rain and a gentle breeze of 17 kph from the south.

  • 12°C maximum temperature12
    °C maximum temperature
  • 2°C minimum temperature2
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 53% chance of some rain53
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 12°C wind chill12
    °C wind chill
  • Gentle breeze of 17 kph from the South17
    kph wind from S

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Decatur weather for Tuesday 25th November 2025

Expect mostly cloudy with light rain in Decatur, Illinois with a maximum temperature of 12°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 49% chance of some rain and a moderate breeze of 28 kph from the west.

  • 12°C maximum temperature12
    °C maximum temperature
  • 8°C minimum temperature8
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 49% chance of some rain49
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Moderate breeze of 28 kph from the West28
    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 2 (Low) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 35 kph from the west.

  • 6°C maximum temperature6
    °C maximum temperature
  • -2°C minimum temperature-2
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 1°C wind chill1
    °C wind chill
  • Fresh breeze of 35 kph from the West35
    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 0°C, maximum UV of 2 (Low) and 5 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 25 kph from the west.

  • 0°C maximum temperature0
    °C maximum temperature
  • -4°C minimum temperature-4
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -6°C wind chill-6
    °C wind chill
  • Moderate breeze of 25 kph from the West25
    kph wind from W

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Decatur weather for Friday 28th November 2025

Expect broken clouds in Decatur, Illinois with a maximum temperature of 1°C, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the north-west.

  • 1°C maximum temperature1
    °C maximum temperature
  • -7°C minimum temperature-7
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • -2°C wind chill-2
    °C wind chill
  • Gentle breeze of 14 kph from the North-West14
    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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