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 >

Current conditions at

Platteville Municipal Airport (KPVB)

Lat: 42.69°NLon: 90.44°WElev: 1020ft.

Overcast

N/A

Humidity NA
Wind Speed NE 8 G 16 mph
Barometer 30.06 in
Dewpoint N/A
Visibility 10.00 mi
Last update 20 Sep 10:55 am CDT
Extended Forecast for

Potosi WI

  • Today

    Today: A 30 percent chance of showers, mainly before noon. Cloudy, with a high near 65. Northeast wind around 15 mph, with gusts as high as 24 mph.

    High: 65 °F

    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 55. Northeast wind 13 to 15 mph, with gusts as high as 23 mph.

    Low: 55 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of showers before 1pm, then a chance of showers after 3pm. Partly sunny, with a high near 62. Northeast wind around 14 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 62 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 30 percent chance of showers, mainly after 2am. Mostly cloudy, with a low around 50. Northeast wind 9 to 13 mph.

    Low: 50 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 62. Northeast wind 9 to 13 mph.

    High: 62 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 46. Northeast wind 5 to 7 mph.

    Low: 46 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 65. East wind 6 to 8 mph.

    High: 65 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 48. Northeast wind around 5 mph becoming calm in the evening.

    Low: 48 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 65. Calm wind becoming east around 5 mph.

    High: 65 °F

    Mostly Sunny

Detailed Forecast

Today
A 30 percent chance of showers, mainly before noon. Cloudy, with a high near 65. Northeast wind around 15 mph, with gusts as high as 24 mph.
Tonight
Mostly cloudy, with a low around 55. Northeast wind 13 to 15 mph, with gusts as high as 23 mph.
Monday
A chance of showers before 1pm, then a chance of showers after 3pm. Partly sunny, with a high near 62. Northeast wind around 14 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A 30 percent chance of showers, mainly after 2am. Mostly cloudy, with a low around 50. Northeast wind 9 to 13 mph.
Tuesday
Partly sunny, with a high near 62. Northeast wind 9 to 13 mph.
Tuesday Night
Partly cloudy, with a low around 46. Northeast wind 5 to 7 mph.
Wednesday
Mostly sunny, with a high near 65. East wind 6 to 8 mph.
Wednesday Night
Mostly clear, with a low around 48. Northeast wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 65. Calm wind becoming east around 5 mph.
Thursday Night
Mostly cloudy, with a low around 50. Calm wind.
Friday
Partly sunny, with a high near 67. Calm wind becoming east around 5 mph.
Friday Night
Partly cloudy, with a low around 50. Calm wind.
Saturday
Partly sunny, with a high near 69. Calm wind becoming southeast around 5 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Potosi WI
 42.69°N 90.72°W
Last Update:
11:01 am CDT Sep 20, 2026
Forecast Valid:
11am CDT Sep 20, 2026-6pm CDT Sep 26, 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