National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Oskaloosa, Oskaloosa Municipal Airport (KOOA)

Lat: 41.23°NLon: 92.49°WElev: 840ft.

Fair

70°F

21°C

Humidity 87%
Wind Speed E 12 G 18 mph
Barometer 29.98 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 20 Sep 2:15 pm CDT
Extended Forecast for

Ottumwa IA

  • This Afternoon

    This Afternoon: A slight chance of drizzle. Patchy fog after 3pm. Otherwise, mostly cloudy, with a steady temperature around 68. Northeast wind 9 to 11 mph, with gusts as high as 21 mph.

    High: 68 °F

    Slight Chance
    Drizzle and
    Patchy Fog

  • Tonight

    Tonight: A 20 percent chance of showers after 2am. Patchy fog before 9pm, then patchy fog after 11pm. Otherwise, cloudy, with a low around 59. Northeast wind 7 to 9 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Patchy Fog
    then Slight
    Chance
    Showers and
    Patchy Fog

  • Monday

    Monday: A 50 percent chance of showers, mainly after 1pm. Patchy fog before noon. Otherwise, cloudy, with a steady temperature around 62. East northeast wind 7 to 9 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 62 °F

    Chance
    Showers and
    Patchy Fog

  • Monday Night

    Monday Night: Showers likely, mainly before 8pm. Mostly cloudy, with a low around 54. Northeast wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 54 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 63. Northeast wind around 8 mph.

    High: 63 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 67.

    High: 67 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A slight chance of drizzle. Patchy fog after 3pm. Otherwise, mostly cloudy, with a steady temperature around 68. Northeast wind 9 to 11 mph, with gusts as high as 21 mph.
Tonight
A 20 percent chance of showers after 2am. Patchy fog before 9pm, then patchy fog after 11pm. Otherwise, cloudy, with a low around 59. Northeast wind 7 to 9 mph, with gusts as high as 20 mph.
Monday
A 50 percent chance of showers, mainly after 1pm. Patchy fog before noon. Otherwise, cloudy, with a steady temperature around 62. East northeast wind 7 to 9 mph. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Showers likely, mainly before 8pm. Mostly cloudy, with a low around 54. Northeast wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 63. Northeast wind around 8 mph.
Tuesday Night
Partly cloudy, with a low around 48.
Wednesday
Sunny, with a high near 65.
Wednesday Night
Mostly clear, with a low around 50.
Thursday
Partly sunny, with a high near 67.
Thursday Night
Mostly cloudy, with a low around 54.
Friday
A 30 percent chance of showers. Mostly cloudy, with a high near 71.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 57.
Saturday
A 30 percent chance of showers. Mostly cloudy, with a high near 72.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ottumwa IA
 41.02°N 92.42°W
Last Update:
1:26 pm CDT Sep 20, 2026
Forecast Valid:
2pm CDT Sep 20, 2026-6pm CDT Sep 26, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation