Decatur weather live forecast

Today's maximum temperature in Decatur is expected to be 23°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 Saturday 15th 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 Saturday 15th November 2025

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 23°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 28 kph from the south-west.

  • 23°C maximum temperature23
    °C maximum temperature
  • 11°C minimum temperature11
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 23°C wind chill23
    °C wind chill
  • Moderate breeze of 28 kph from the South-West28
    kph wind from SW

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Decatur weather for Sunday 16th November 2025

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 12°C, maximum UV of 3 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the north-west.

  • 12°C maximum temperature12
    °C maximum temperature
  • 3°C minimum temperature3
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 12°C wind chill12
    °C wind chill
  • Moderate breeze of 20 kph from the North-West20
    kph wind from NW

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Decatur weather for Monday 17th November 2025

Expect mostly cloudy with light rain in Decatur, Illinois with a maximum temperature of 12°C, maximum UV of 3 (Moderate) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 88% chance of some rain and a gentle breeze of 18 kph from the south-east.

  • 12°C maximum temperature12
    °C maximum temperature
  • -1°C minimum temperature-1
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 88% chance of some rain88
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 12°C wind chill12
    °C wind chill
  • Gentle breeze of 18 kph from the South-East18
    kph wind from SE

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Decatur weather for Tuesday 18th November 2025

Expect sunshine and showers in Decatur, Illinois with a maximum temperature of 13°C, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 54% chance of some rain and a moderate breeze of 20 kph from the east.

  • 13°C maximum temperature13
    °C maximum temperature
  • 6°C minimum temperature6
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 54% chance of some rain54
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Moderate breeze of 20 kph from the East20
    kph wind from E

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Decatur weather for Wednesday 19th November 2025

Expect mostly cloudy with light rain in Decatur, Illinois with a maximum temperature of 17°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 28% chance of some rain and a gentle breeze of 14 kph from the east.

  • 17°C maximum temperature17
    °C maximum temperature
  • 8°C minimum temperature8
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 28% chance of some rain28
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 17°C wind chill17
    °C wind chill
  • Gentle breeze of 14 kph from the East14
    kph wind from E

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

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