Decatur weather live forecast

Tomorrow's maximum temperature in Decatur is expected to be 12°C.

  • Saturday
    22nd Mar
    Sunshine and showers (0-2 mm of rainfall expected)
  • Sunday
    23rd Mar
    Mostly cloudy with rain (10-20 mm of rainfall expected)
  • Monday
    24th Mar
    Broken clouds
  • Tuesday
    25th Mar
    Broken clouds
  • Wednesday
    26th Mar
    Scattered clouds

5-day weather forecast updated at 04:01 on Saturday 22nd March 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 Saturday 22nd March 2025

Expect sunshine and showers in Decatur, Illinois with a maximum temperature of 12°C, maximum UV of 5 (Moderate) and 10 hours of bright sunshine. There are 0-2 mm of rainfall expected with 3% chance of some rain and a gentle breeze of 16 kph from the north-west.

  • 12°C maximum temperature12
    °C maximum temperature
  • 5°C minimum temperature5
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 3% chance of some rain3
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 16 kph from the North-West16
    kph wind from NW

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Decatur weather for Sunday 23rd March 2025

Expect mostly cloudy with rain in Decatur, Illinois with a maximum temperature of 15°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 10-20 mm of rainfall expected with 79% chance of some rain and a gentle breeze of 18 kph from the south-east.

  • 15°C maximum temperature15
    °C maximum temperature
  • 6°C minimum temperature6
    °C minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 79% chance of some rain79
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • 15°C wind chill15
    °C wind chill
  • Gentle breeze of 18 kph from the South-East18
    kph wind from SE

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Decatur weather for Monday 24th March 2025

Expect broken clouds in Decatur, Illinois with a maximum temperature of 13°C, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the west.

  • 13°C maximum temperature13
    °C maximum temperature
  • 3°C minimum temperature3
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 17 kph from the West17
    kph wind from W

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Decatur weather for Tuesday 25th March 2025

Expect broken clouds in Decatur, Illinois with a maximum temperature of 15°C, maximum UV of 4 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the north-west.

  • 15°C maximum temperature15
    °C maximum temperature
  • 4°C minimum temperature4
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 9 kph from the North-West9
    kph wind from NW

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Decatur weather for Wednesday 26th March 2025

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 14°C, maximum UV of 3 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north-west.

  • 14°C maximum temperature14
    °C maximum temperature
  • 3°C minimum temperature3
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 14°C wind chill14
    °C wind chill
  • Light breeze of 11 kph from the North-West11
    kph wind from NW

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

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