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 04:02 on Saturday 7th February 2026 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 7th February 2026

Expect scattered clouds in Decatur, Illinois with a maximum temperature of -2°C, maximum UV of 3 (Moderate) and 9 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 19 kph from the south-east.

  • -2°C maximum temperature-2
    °C maximum temperature
  • -8°C minimum temperature-8
    °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 cm of snow expected0
    cm of snow expected
  • -8°C wind chill-8
    °C wind chill
  • Gentle breeze of 19 kph from the South-East19
    kph wind from SE

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Decatur weather for Sunday 8th February 2026

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 1°C, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 22 kph from the south-east.

  • 1°C maximum temperature1
    °C maximum temperature
  • -6°C minimum temperature-6
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • -5°C wind chill-5
    °C wind chill
  • Moderate breeze of 22 kph from the South-East22
    kph wind from SE

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Decatur weather for Monday 9th February 2026

Expect clear skies in Decatur, Illinois with a maximum temperature of 7°C, maximum UV of 3 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 19 kph from the south.

  • 7°C maximum temperature7
    °C maximum temperature
  • -4°C minimum temperature-4
    °C minimum temperature
  • Clear skies
    clear skies
  • 11 hours of bright sunshine11
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 3°C wind chill3
    °C wind chill
  • Gentle breeze of 19 kph from the South19
    kph wind from S

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Decatur weather for Tuesday 10th February 2026

Expect sunshine and showers in Decatur, Illinois with a maximum temperature of 14°C, maximum UV of 2 (Low) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 28% chance of some rain and a gentle breeze of 19 kph from the south-west.

  • 14°C maximum temperature14
    °C maximum temperature
  • 2°C minimum temperature2
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 8 hours of bright sunshine8
    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
  • 14°C wind chill14
    °C wind chill
  • Gentle breeze of 19 kph from the South-West19
    kph wind from SW

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Decatur weather for Wednesday 11th February 2026

Expect sunshine and showers in Decatur, Illinois with a maximum temperature of 6°C, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 21% chance of some rain and a gentle breeze of 19 kph from the north.

  • 6°C maximum temperature6
    °C maximum temperature
  • 0°C minimum temperature0
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 21% chance of some rain21
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 2°C wind chill2
    °C wind chill
  • Gentle breeze of 19 kph from the North19
    kph wind from N

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

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