Lake Delton, WI 53940 Weather

Sauk County12:43 PM CDT43.59°N, 89.79°W

Current conditions

Sunny
65°
Sunny
Feels like 65°
High 73°·Low 50°
WindSE 5 mph
Humidity63%
Dew point52°
Visibility10 mi
Cloud cover10%
UV index3 Moderate
Sunrise7:23 AM
Sunset6:06 PM

Forecast for this hour (no station report in the last two hours)

Forecast

10-day

  • Today

    Sunny, with a high near 73. Southeast wind 0 to 5 mph.

  • Tonight

    Mostly clear, with a low around 50. Southeast wind 0 to 5 mph.

  • Friday

    Mostly sunny, with a high near 73. Southeast wind 5 to 10 mph.

National Weather Service forecast updated 3 hrs ago.

Hourly

Hourly forecast
  1. Now Sunny 65°
  2. 1 PM Sunny 68°
  3. 2 PM Sunny 70°
  4. 3 PM Sunny 71°
  5. 4 PM Sunny 72°
  6. 5 PM Sunny 70°
  7. 6 PM Clear 66°
  8. 7 PM Clear 62°
  9. 8 PM Clear 60°
  10. 9 PM Mostly Clear 59°
  11. 10 PM Mostly Clear 57°
  12. 11 PM Mostly Clear 56°
  13. Fri12 AM Mostly Clear 55°
  14. 1 AM Mostly Clear 54°
  15. 2 AM Partly Cloudy 55°
  16. 3 AM Partly Cloudy 54°
  17. 4 AM Partly Cloudy 53°
  18. 5 AM Partly Cloudy 53°
  19. 6 AM Partly Sunny 52°
  20. 7 AM Partly Sunny 52°
  21. 8 AM Partly Sunny 53°
  22. 9 AM Mostly Sunny 57°
  23. 10 AM Mostly Sunny 60°
  24. 11 AM Mostly Sunny 64°

10-day forecast

Details
  1. TodayOct 22 Sunny Sunny50°73°
  2. FriOct 23 Mostly Sunny Mostly Sunny52°73°
  3. SatOct 24 Partly Sunny Partly Sunny53°72°
  4. SunOct 25 Partly Sunny Partly Sunny11%48°69°
  5. MonOct 26 Chance Rain Showers Chance Rain Showers37%41°58°
  6. TueOct 27 Chance Rain Showers Chance Rain Showers34%40°55°
  7. WedOct 28 Slight Chance Rain Showers Slight Chance Rain Showers22%41°58°
  8. ThuOct 29 Cloudy Cloudy0.03 in35°55°
  9. FriOct 30 Sunny Sunny31°48°
  10. SatOct 31 Partly cloudy Partly cloudy0.02 in34°54°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
Open the National Weather Service radar (the map here needs JavaScript).

Weather news in Wisconsin

More weather news
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Air quality

47
Good
Fine particles (PM2.5)

Air quality is satisfactory, and air pollution poses little or no risk.

Forecast

  • ThuModerate
  • FriModerate
  • SatModerate

Central Waters South, WI reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:23 AM
Sunset 6:06 PM
Daylight 10 h 43 min (−2 min 50 s tomorrow)
Waxing Gibbous · 86% lit
Moonrise 4:15 PM Moonset 3:21 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low58° / 36°
Record high81° (1953)
Record low17° (1982)
Wettest1.21 in (1972)
Month to date2.92 in (normal 2.03 in)

Baraboo Wwtp, records since 1893. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in MKX, issued 5 hrs ago

Key Messages

- Marine Dense Fog Advisory in effect for northern third of the lake until 1 PM CDT.

- Fog possible tonight, potentially dense, primarily closer to the lake

- Above normal temperatures & rain-free conditions continue into the weekend.

- Temperatures trending back toward normal next week, with chances for rain Monday night into Tuesday and Wednesday night.

Update

Issued 700 AM CDT Thu Oct 22 2026

Some patchy fog out there this morning but as the sun comes up fog will clear out with light winds and mostly clear conditions through the day. Some models are suggestive of the lake breeze today increasing moisture behind it and potentially setting up a situation for fog and low stratus tonight, primarily near the lake. Dense fog will be possible.

Kuroski

Short Term

Issued 1152 PM CDT Wed Oct 21 2026

The rest of tonight through Thursday night:

Mostly clear skies and light winds under high pressure will continue tonight into Thursday. Temps have been dropping a bit faster this evening than anticipated, so may need to lower overnight lows a bit. Still think there could be some patchy fog later tonight into early Thursday. Highs tomorrow will be very similar to this past afternoon, though may be a touch cooler near the lake under light onshore winds. Wouldn't be surprised by more fog chances Thursday night, as the light winds and limited cloud cover continue.

DDV

Long Term

Issued 1152 PM CDT Wed Oct 21 2026

Friday through Wednesday:

Surface high pressure and an upper ridge are expected to maintain enough of influence across southern Wisconsin to keep dry weather and above normal temps going Friday through Sunday. Dry weather may persist into Monday, depending on the timing of a trough and front passage, which has been trending slower. The trough is likely to move through by Tuesday, bringing rain chances back to the forecast area along with cooler conditions for mid-week.

DDV

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.