Decatur weather live forecast

Tomorrow's maximum temperature in Decatur is expected to be 21°C.

  • Wednesday
    12th Mar
    Scattered clouds
  • Thursday
    13th Mar
    Scattered clouds
  • Friday
    14th Mar
    Sunshine and showers (0-2 mm of rainfall expected)
  • Saturday
    15th Mar
    Isolated thunderstorms (0-2 mm of rainfall expected)
  • Sunday
    16th Mar
    Broken clouds

5-day weather forecast updated at 04:01 on Wednesday 12th 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 Wednesday 12th March 2025

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the east.

  • 21°C maximum temperature21
    °C maximum temperature
  • 4°C minimum temperature4
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 21°C wind chill21
    °C wind chill
  • Light breeze of 7 kph from the East7
    kph wind from E

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Decatur weather for Thursday 13th March 2025

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 23°C, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the south-east.

  • 23°C maximum temperature23
    °C maximum temperature
  • 9°C minimum temperature9
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 7 kph from the South-East7
    kph wind from SE

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Decatur weather for Friday 14th March 2025

Expect sunshine and showers in Decatur, Illinois with a maximum temperature of 24°C, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 83% chance of some rain and a moderate breeze of 25 kph from the south.

  • 24°C maximum temperature24
    °C maximum temperature
  • 13°C minimum temperature13
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 83% chance of some rain83
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Moderate breeze of 25 kph from the South25
    kph wind from S

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Decatur weather for Saturday 15th March 2025

Expect isolated thunderstorms in Decatur, Illinois with a maximum temperature of 20°C, maximum UV of 4 (Moderate) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 13% chance of some rain and a moderate breeze of 23 kph from the south-west.

  • 20°C maximum temperature20
    °C maximum temperature
  • 8°C minimum temperature8
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 13% chance of some rain13
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Moderate breeze of 23 kph from the South-West23
    kph wind from SW

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Decatur weather for Sunday 16th March 2025

Expect broken clouds in Decatur, Illinois with a maximum temperature of 6°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the west.

  • 6°C maximum temperature6
    °C maximum temperature
  • 0°C minimum temperature0
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 3°C wind chill3
    °C wind chill
  • Gentle breeze of 17 kph from the West17
    kph wind from W

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

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