Local Forecast

Waterloo, IL Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Waterloo, IL.

Active Alerts 2 active

Hour-by-Hour  Current Observation

Sunday 4:00 AM CDTSunday 4:00 AM

°F °C
Regional Observations →
73°F

Partly Cloudy

  • 91° / 73° High / Low
  • 73° Feels Like
  • 0% Chance of Rain

Wind

0 mph

N

UV Index

0

None

Humidity

100%

Dew 73°F

Sun

5:38 AM · 8:27 PM

Rise · Set

Source: CAHOKIA/ST LOUIS (KCPS). Slider scrubs the next 12 hours.

5-Day Outlook

Through Thursday

Local Radar →

Today

91° 73°

Partly Sunny

Overnight: Mostly Cloudy

Detailed forecast

Today

Sunny, with a high near 92. Heat index values as high as 105. South wind 5 to 8 mph.

Night

Mostly clear, with a low around 73. Heat index values as high as 102. South wind 5 to 8 mph.

Monday

93° 75°

Mostly Sunny

Overnight: Mostly Clear

Detailed forecast

Monday

Mostly sunny, with a high near 93. Heat index values as high as 109. South wind 5 to 9 mph.

Night

Mostly clear, with a low around 74. South wind 5 to 8 mph.

Tuesday

95° 75°

Sunny

Overnight: Clear

Detailed forecast

Tuesday

Sunny, with a high near 94.

Night

Clear, with a low around 74.

Wednesday

93° 75°

Mostly Sunny

Overnight: Mostly Clear

Detailed forecast

Wednesday

Sunny, with a high near 93.

Night

Mostly clear, with a low around 75.

Thursday

93° 75°

Mostly Sunny

Overnight: Mostly Clear

Detailed forecast

Thursday

Sunny, with a high near 92.

Night

Mostly clear, with a low around 74.

Waterloo, IL Weather Analysis Tools