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Changes to River Forecast Services at Multiple Locations in Central Iowa, effective 6/22/2026

Hazardous Weather Conditions

Current conditions at

Knoxville (KOXV)

Lat: 41.3°NLon: 93.12°WElev: 928ft.

Overcast

77°F

25°C

Humidity	74%
Wind Speed	SE 9 mph
Barometer	29.87 in
Dewpoint	68°F (20°C)
Visibility	10.00 mi
Heat Index	79°F (26°C)
Last update	27 Jun 4:15 pm CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

4 Miles SSW Marysville IA

Extreme Heat Warning June 28, 01:00pm until June 30, 09:00pm

Click here for hazard details and duration

Extreme Heat Warning

This Afternoon
High: 77 °F
Partly Sunny
Tonight
Low: 69 °F
Mostly Cloudy
then Slight
Chance
T-storms
Sunday
High: 92 °F
Mostly Sunny
and Breezy
Sunday Night
Low: 76 °F
Mostly Clear
and Breezy
then Mostly
Clear
Monday
High: 93 °F
Sunny and
Breezy
Monday Night
Low: 77 °F
Partly Cloudy
and Breezy
then Partly
Cloudy
Tuesday
High: 94 °F
Sunny and
Breezy
Tuesday Night
Low: 75 °F
Mostly Clear
and Breezy
then Mostly
Clear
Wednesday
High: 94 °F
Sunny then
Sunny and
Breezy

Detailed Forecast

This Afternoon

Partly sunny, with a steady temperature around 77. East southeast wind around 9 mph.

Tonight

A 20 percent chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 69. East southeast wind 8 to 11 mph, with gusts as high as 20 mph.

Sunday

Mostly sunny, with a high near 92. Heat index values as high as 105. Breezy, with a south southeast wind 13 to 18 mph, with gusts as high as 28 mph.

Sunday Night

Mostly clear, with a low around 76. Breezy, with a south wind 11 to 16 mph, with gusts as high as 26 mph.

Monday

Sunny, with a high near 93. Breezy, with a south wind 13 to 20 mph, with gusts as high as 30 mph.

Monday Night

Partly cloudy, with a low around 77. Breezy.

Tuesday

Sunny, with a high near 94. Breezy.

Tuesday Night

Mostly clear, with a low around 75. Breezy.