Delafield, WI Weather

Waukesha County1:03 AM CDT43.06°N, 88.40°WElevation 902 ft

Current conditions

Fog/Mist
46°
Fog/Mist
Feels like 46°
High 67°·Low 42° tonight
WindSSW 2 mph
Humidity100%
Dew point46°
Pressure30.29 inHg
Visibility6.0 mi
Cloud cover32%
UV index0 Low
Sunrise7:15 AM
Sunset6:03 PM

Observed at Waukesha County Airport · 48 min ago

Forecast

10-day

  • Tuesday Night

    Partly cloudy, with a low around 42. Southeast wind 0 to 5 mph.

  • Wednesday

    Sunny, with a high near 67. Southwest wind 0 to 5 mph.

  • Wednesday Night

    Partly cloudy, with a low around 47. West wind around 0 mph.

National Weather Service forecast updated 21 hrs ago.

Hourly

Hourly forecast
  1. Now Partly Cloudy 46°
  2. 2 AM Partly Cloudy 45°
  3. 3 AM Partly Cloudy 44°
  4. 4 AM Partly Cloudy 44°
  5. 5 AM Partly Cloudy 43°
  6. 6 AM Mostly Sunny 43°
  7. 7 AM Mostly Sunny 43°
  8. 8 AM Sunny 45°
  9. 9 AM Sunny 50°
  10. 10 AM Sunny 54°
  11. 11 AM Sunny 59°
  12. 12 PM Sunny 62°
  13. 1 PM Sunny 64°
  14. 2 PM Mostly Sunny 65°
  15. 3 PM Sunny 66°
  16. 4 PM Sunny 67°
  17. 5 PM Sunny 65°
  18. 6 PM Mostly Clear 61°
  19. 7 PM Partly Cloudy 59°
  20. 8 PM Mostly Cloudy 56°
  21. 9 PM Partly Cloudy 54°
  22. 10 PM Mostly Clear 53°
  23. 11 PM Mostly Clear 52°
  24. Thu12 AM Mostly Clear 51°

10-day forecast

Details
  1. TonightOct 19 Mostly Clear Mostly Clear42°
  2. TueOct 20 Areas Of Fog then Sunny Areas Of Fog then Sunny42°67°
  3. TodayOct 21 Sunny Sunny47°67°
  4. ThuOct 22 Sunny Sunny48°68°
  5. FriOct 23 Sunny Sunny48°66°
  6. SatOct 24 Partly Sunny Partly Sunny52°66°
  7. SunOct 25 Partly Sunny Partly Sunny47°68°
  8. MonOct 26 Mostly Sunny then Slight Chance Rain Showers Mostly Sunny then Slight Chance Rain Showers15%62°
  9. TueOct 27 Cloudy Cloudy39°50°
  10. WedOct 28 Partly cloudy Partly cloudy37°50°

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

Radar

Full map
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Weather news near Delafield

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Air quality

62
Moderate
Fine particles (PM2.5)

Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Forecast

  • WedModerate
  • ThuModerate
  • FriModerate

Kettle Moraine 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 7:15 AM
Sunset 6:03 PM
Daylight 10 h 47 min (−2 min 46 s tomorrow)
Waxing Gibbous · 75% lit
Moonrise 3:49 PM Moonset 2:09 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low58° / 38°
Month to date2.28 in (normal 1.86 in)

Oconomowoc 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 4 hrs ago

Key Messages

- Patchy dense fog may occur in eastern parts of the area later this evening into early Wednesday morning, with some dense fog into tonight/Wednesday morning over portions of the nearshore waters of Lake Michigan.

- Dry with a gradual warming trend into Saturday night/Sunday, then possibly some showers and cooler temperatures Sunday night into early next week.

Update

Issued 810 PM CDT Tue Oct 20 2026

No changes to the going forecast.

With perfectly clear skies evident on Satellite, nearly calm winds, and a remnant lake-breeze boundary washed onshore, conditions are primed for radiational cooling and (eventually) fog development later this evening into Tonight.

Sheppard

Short Term

Issued 235 PM CDT Tue Oct 20 2026

Tonight through Friday:

High pressure will shift further to the east northeast of the region tonight, with another high pressure system shifting east into and northeast of the region Thursday into Friday.

There is an area of patchy dense fog over the nearshore waters of Lake Michigan for areas north of North Point Lighthouse, which may continue to linger there into tonight. This may push back onshore tonight into early Wednesday morning for eastern portions of the area. Kept the fog mention in the forecast for eastern parts of the area for this period. Will have to watch trends to see if a Dense Fog Advisory would be needed at some point.

Otherwise, dry conditions are expected into the end of the week. Temperatures will remain above seasonal normal values as well, with highs into the upper 60s to around 70 degrees each day Wednesday into Friday. Onshore winds each day should bring slightly cooler temperatures to areas near Lake Michigan. Lows each night should rise into the middle to upper 40s by Wednesday night and Thursday night.

Wood

Long Term

Issued 235 PM CDT Tue Oct 20 2026

Friday night through Tuesday:

500 mb cluster analysis generally shows an anomalous 500 mb ridge axis developing over the region Friday night into Saturday night, before becoming more zonal Sunday into Monday. This should result in south winds maintaining warm temperatures into the weekend. There may finally be a cold front that shifts slowly southeast across the region Sunday into Sunday night or Monday. This may have enough moisture and upward vertical motion with it to bring 20 to 30 percent chances for showers.

Cold air advection behind the front with north to northeast winds may bring cooler and more seasonable temperatures for early next week. This is supported by ensemble member trends.

Wood

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.