National Weather Service United States Department of Commerce

A stalled frontal boundary and ample monsoonal moisture will lead to flash flood potential from the Great Basin to the Great Plains tonight and Tuesday

A stalled frontal boundary will set up along the southern and central Rockies for the next couple of days providing focus for showers and thunderstorms. In addition, ample monsoonal moisture will stream in across the southwest bringing enough moisture to introduce a flash flood threat from the Great Basin and Southwest eastward across the central and southern Rockies into the adjacent Plains.
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Current Conditions

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Decatur IL

7 Day Forecast

For More Weather Information:

Lincoln, IL Local Forecast Office

Overnight

Clear

Clear

Low: 55 °F

Tuesday

Mostly Sunny

Mostly
Sunny

High: 77 °F

Tuesday
Night

Partly Cloudy

Partly
Cloudy

Low: 57 °F

Wednesday

Mostly Sunny

Mostly
Sunny

High: 80 °F

Wednesday
Night

Partly Cloudy

Partly
Cloudy

Low: 60 °F

Thursday

Mostly Sunny

Mostly
Sunny

High: 80 °F

Thursday
Night

Partly Cloudy

Partly
Cloudy

Low: 61 °F

Friday

Chance Thunderstorms

Chance
Thunderstorms

High: 81 °F

Friday
Night

Partly Cloudy

Partly
Cloudy

Low: 61 °F

Detailed Forecast

  • Overnight Clear, with a low around 55. West wind around 5 mph.
  • Tuesday Mostly sunny, with a high near 77. Light west northwest wind increasing to 5 to 10 mph in the morning.
  • Tuesday Night Partly cloudy, with a low around 57. West wind 3 to 7 mph.
  • Wednesday Mostly sunny, with a high near 80. West northwest wind 5 to 8 mph.
  • Wednesday Night Partly cloudy, with a low around 60. West northwest wind around 5 mph becoming calm in the evening.
  • Thursday Mostly sunny, with a high near 80.
  • Thursday Night Partly cloudy, with a low around 61.
  • Friday A chance of showers and thunderstorms. Partly sunny, with a high near 81.
  • Friday Night Partly cloudy, with a low around 61.
  • Saturday A chance of showers and thunderstorms. Partly sunny, with a high near 81.
  • Saturday Night Partly cloudy, with a low around 62.
  • Sunday Mostly sunny, with a high near 81.
  • Sunday Night Mostly clear, with a low around 61.
  • Monday Mostly sunny, with a high near 83.