Decatur weather live forecast

Tomorrow's maximum temperature in Decatur is expected to be 64°F.

5-day weather forecast updated at 04:01 on Saturday 19th April 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 19th April 2025

Expect isolated thunderstorms in Decatur, Illinois with a maximum temperature of 64°F, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 20-30 mm of rainfall expected with 98% chance of some rain and a light breeze of 6 mph from the north-west.

  • 64°F maximum temperature64
    °F maximum temperature
  • 54°F minimum temperature54
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 98% chance of some rain98
    % chance of some rain
  • 20-30 mm of rainfall expected<30
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 6 mph from the North-West6
    mph wind from NW

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Decatur weather for Sunday 20th April 2025

Expect mostly cloudy with rain in Decatur, Illinois with a maximum temperature of 72°F, maximum UV of 5 (Moderate) and 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 74% chance of some rain and a gentle breeze of 10 mph from the east.

  • 72°F maximum temperature72
    °F maximum temperature
  • 52°F minimum temperature52
    °F minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 74% chance of some rain74
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • 72°F wind chill72
    °F wind chill
  • Gentle breeze of 10 mph from the East10
    mph wind from E

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Decatur weather for Monday 21st April 2025

Expect sunshine and showers in Decatur, Illinois with a maximum temperature of 64°F, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 5-10 mm of rainfall expected with 25% chance of some rain and a gentle breeze of 11 mph from the west.

  • 64°F maximum temperature64
    °F maximum temperature
  • 52°F minimum temperature52
    °F minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 25% chance of some rain25
    % chance of some rain
  • 5-10 mm of rainfall expected<10
    mm of rainfall expected
  • 64°F wind chill64
    °F wind chill
  • Gentle breeze of 11 mph from the West11
    mph wind from W

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Decatur weather for Tuesday 22nd April 2025

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 75°F, maximum UV of 7 (High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the south.

  • 75°F maximum temperature75
    °F maximum temperature
  • 48°F minimum temperature48
    °F minimum temperature
  • Scattered clouds
    scattered clouds
  • 13 hours of bright sunshine13
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 75°F wind chill75
    °F wind chill
  • Light breeze of 6 mph from the South6
    mph wind from S

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Decatur weather for Wednesday 23rd April 2025

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 77°F, maximum UV of 7 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 3 mph from the south.

  • 77°F maximum temperature77
    °F maximum temperature
  • 55°F minimum temperature55
    °F minimum temperature
  • Scattered clouds
    scattered clouds
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Little or no wind of 3 mph from the South3
    mph wind from S

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Metric (°C)  |  Imperial (°F)

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