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

Heavy Rainfall Threat Continues in the Southwest on Monday; Record Warmth in the Plains and Midwest

Remnant moisture from Tropical Storm Rachel will persist over portions of the Great Basin and Southwest on Monday, bringing a potential heavy to excessive rainfall risk. Well above average and potentially record breaking temperatures will develop across the Plains and Midwest early this week, spreading into the Lower Mississippi Valley and Southeast midweek. Read More >

Current conditions at

ONIDAMUNC (K98D)

Lat: 44.7°NLon: 100.1°WElev: 1874ft.

Fog/Mist

46°F

8°C

Humidity 100%
Wind Speed NE 15 mph
Barometer 29.76 in
Dewpoint 46°F (8°C)
Visibility 3.00 mi
Wind Chill40°F (4°C)
Last update 12 Oct 2:35 am CDT
Extended Forecast for

Lebanon SD

  • Overnight

    Overnight: A chance of showers, mainly after 5am. Patchy fog after 3am. Otherwise, cloudy, with a low around 42. North northeast wind around 17 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.

    Low: 42 °F

    Chance
    Showers and
    Patchy Fog

  • Columbus Day

    Columbus Day: A chance of showers, mainly before 11am. Patchy fog between 9am and 11am. Otherwise, cloudy, with a high near 55. East northeast wind 9 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 30%.

    High: 55 °F

    Chance
    Showers and
    Patchy Fog
    then Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 38. Northwest wind 13 to 15 mph, with gusts as high as 24 mph.

    Low: 38 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of showers, mainly before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 53. North northwest wind 8 to 10 mph. Chance of precipitation is 30%.

    High: 53 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Patchy frost after 4am. Otherwise, partly cloudy, with a low around 35. North wind 5 to 8 mph.

    Low: 35 °F

    Mostly Cloudy
    then Patchy
    Frost

  • Wednesday

    Wednesday: Patchy frost before 8am. Otherwise, sunny, with a high near 59. North wind 3 to 7 mph.

    High: 59 °F

    Patchy Frost
    then Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers, mainly after 1am. Mostly cloudy, with a low around 39. East wind around 6 mph becoming light and variable. Chance of precipitation is 40%.

    Low: 39 °F

    Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 59. Breezy, with a northwest wind 6 to 16 mph increasing to 19 to 29 mph. Winds could gust as high as 39 mph.

    High: 59 °F

    Mostly Cloudy
    then Mostly
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 33. Breezy, with a north northwest wind 18 to 26 mph, with gusts as high as 45 mph.

    Low: 33 °F

    Mostly Clear
    and Breezy

Detailed Forecast

Overnight
A chance of showers, mainly after 5am. Patchy fog after 3am. Otherwise, cloudy, with a low around 42. North northeast wind around 17 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.
Columbus Day
A chance of showers, mainly before 11am. Patchy fog between 9am and 11am. Otherwise, cloudy, with a high near 55. East northeast wind 9 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 38. Northwest wind 13 to 15 mph, with gusts as high as 24 mph.
Tuesday
A chance of showers, mainly before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 53. North northwest wind 8 to 10 mph. Chance of precipitation is 30%.
Tuesday Night
Patchy frost after 4am. Otherwise, partly cloudy, with a low around 35. North wind 5 to 8 mph.
Wednesday
Patchy frost before 8am. Otherwise, sunny, with a high near 59. North wind 3 to 7 mph.
Wednesday Night
A chance of showers, mainly after 1am. Mostly cloudy, with a low around 39. East wind around 6 mph becoming light and variable. Chance of precipitation is 40%.
Thursday
Partly sunny, with a high near 59. Breezy, with a northwest wind 6 to 16 mph increasing to 19 to 29 mph. Winds could gust as high as 39 mph.
Thursday Night
Mostly clear, with a low around 33. Breezy, with a north northwest wind 18 to 26 mph, with gusts as high as 45 mph.
Friday
Sunny, with a high near 55.
Friday Night
Areas of frost. Otherwise, mostly clear, with a low around 34.
Saturday
Sunny, with a high near 67. Breezy.
Saturday Night
Mostly clear, with a low around 42.
Sunday
Sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lebanon SD
 45.07°N 99.78°W (Elev. 1955 ft)
Last Update:
2:21 am CDT Oct 12, 2026
Forecast Valid:
2am CDT Oct 12, 2026-6pm CDT Oct 18, 2026
 
Forecast Discussion
 
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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