Decatur weather live forecast

Today's maximum temperature in Decatur is expected to be 11°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 Friday 21st November 2025 GMT

More about Decatur

Decatur by month

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

Recommended for Illinois

TUI sale: up to £300 off holidays in 2026/2027

  • Save up to £300 on holidays (Jan 2026-Nov 2027)
  • Book online with TUI Black Friday discount code
  • Sign up to myTUI. Discount varies by spend. T&Cs apply
Go to TUI deal >>

Expires at 23:59 on Tuesday 2nd Dec 2025 · 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 Friday 21st November 2025

Expect mostly cloudy with rain in Decatur, Illinois with a maximum temperature of 11°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 78% chance of some rain and a gentle breeze of 17 kph from the north-east.

  • 11°C maximum temperature11
    °C maximum temperature
  • 7°C minimum temperature7
    °C minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 78% chance of some rain78
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • 11°C wind chill11
    °C wind chill
  • Gentle breeze of 17 kph from the North-East17
    kph wind from NE

Back to top

Decatur weather for Saturday 22nd November 2025

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 10°C, maximum UV of 2 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the south-west.

  • 10°C maximum temperature10
    °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 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 14 kph from the South-West14
    kph wind from SW

Back to top

Decatur weather for Sunday 23rd November 2025

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 13°C, maximum UV of 2 (Low) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the west.

  • 13°C maximum temperature13
    °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 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 13 kph from the West13
    kph wind from W

Back to top

Decatur weather for Monday 24th November 2025

Expect mostly cloudy with light rain in Decatur, Illinois with a maximum temperature of 12°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 2-5 mm of rainfall expected with 87% chance of some rain and a moderate breeze of 21 kph from the south.

  • 12°C maximum temperature12
    °C maximum temperature
  • 5°C minimum temperature5
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 87% chance of some rain87
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 12°C wind chill12
    °C wind chill
  • Moderate breeze of 21 kph from the South21
    kph wind from S

Back to top

Decatur weather for Tuesday 25th November 2025

Expect mostly cloudy with light rain in Decatur, Illinois with a maximum temperature of 14°C, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 51% chance of some rain and a moderate breeze of 23 kph from the west.

  • 14°C maximum temperature14
    °C maximum temperature
  • 6°C minimum temperature6
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 51% chance of some rain51
    % 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 West23
    kph wind from W

Back to top

TUI sale: up to £300 off holidays in 2026/2027

  • Save up to £300 on holidays (Jan 2026-Nov 2027)
  • Book online with TUI Black Friday discount code
  • Sign up to myTUI. Discount varies by spend. T&Cs apply
Go to TUI deal >>

Expires at 23:59 on Tuesday 2nd Dec 2025 · 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 holiday destinations

More holidays

Save with latest deals & discounts

More deals

Airport parking

More parking

Airport lounges

More lounges

Top ^