Decatur weather live forecast

Tomorrow's maximum temperature in Decatur is expected to be 16°C.

  • Monday
    5th May
    Mostly cloudy with light rain (0-2 mm of rainfall expected)
  • Tuesday
    6th May
    Scattered clouds
  • Wednesday
    7th May
    Broken clouds
  • Thursday
    8th May
    Broken clouds
  • Friday
    9th May
    Clear skies

5-day weather forecast updated at 04:01 on Monday 5th May 2025 GMT

More about Decatur

Decatur by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Illinois

TUI: up to 7% off holidays booked online

  • Book online with TUI & save up to 7% on holidays
  • FREE child places available for select holidays
  • Pay £0 deposits with direct debit & spread the cost
Go to TUI deal >>

View all TUI offers

TUITUI deal finder

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 Monday 5th May 2025

Expect mostly cloudy with light rain in Decatur, Illinois with a maximum temperature of 16°C, maximum UV of 3 (Moderate) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 42% chance of some rain and little or no wind of 6 kph from the north.

  • 16°C maximum temperature16
    °C maximum temperature
  • 9°C minimum temperature9
    °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)
  • 42% chance of some rain42
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 16°C wind chill16
    °C wind chill
  • Little or no wind of 6 kph from the North6
    kph wind from N

Back to top

Decatur weather for Tuesday 6th May 2025

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 20°C, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 4 kph from the north-west.

  • 20°C maximum temperature20
    °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
  • 20°C wind chill20
    °C wind chill
  • Little or no wind of 4 kph from the North-West4
    kph wind from NW

Back to top

Decatur weather for Wednesday 7th May 2025

Expect broken clouds in Decatur, Illinois with a maximum temperature of 22°C, maximum UV of 6 (High) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the north-east.

  • 22°C maximum temperature22
    °C maximum temperature
  • 12°C minimum temperature12
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 22°C wind chill22
    °C wind chill
  • Little or no wind of 6 kph from the North-East6
    kph wind from NE

Back to top

Decatur weather for Thursday 8th May 2025

Expect broken clouds in Decatur, Illinois with a maximum temperature of 21°C, maximum UV of 7 (High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north-east.

  • 21°C maximum temperature21
    °C maximum temperature
  • 11°C minimum temperature11
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 21°C wind chill21
    °C wind chill
  • Light breeze of 11 kph from the North-East11
    kph wind from NE

Back to top

Decatur weather for Friday 9th May 2025

Expect clear skies in Decatur, Illinois with a maximum temperature of 19°C, maximum UV of 7 (High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the north-east.

  • 19°C maximum temperature19
    °C maximum temperature
  • 8°C minimum temperature8
    °C minimum temperature
  • Clear skies
    clear skies
  • 14 hours of bright sunshine14
    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
  • Light breeze of 8 kph from the North-East8
    kph wind from NE

Back to top

TUI: up to 7% off holidays booked online

  • Book online with TUI & save up to 7% on holidays
  • FREE child places available for select holidays
  • Pay £0 deposits with direct debit & spread the cost
Go to TUI deal >>

View all TUI offers

TUITUI deal finder

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

Back to top

More about the USA

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^