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Brookfield, Wisconsin 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Brookfield WI
National Weather Service Forecast for: Brookfield WI
Issued by: National Weather Service Milwaukee, WI
Updated: 2:24 am CDT Jul 7, 2025
 
Overnight

Overnight: Patchy fog after 3am.  Otherwise, partly cloudy, with a low around 58. North wind around 5 mph.
Patchy Fog

Monday

Monday: Sunny, with a high near 78. North wind around 5 mph.
Sunny

Monday
Night
Monday Night: Partly cloudy, with a low around 61. East wind around 5 mph becoming calm  in the evening.
Partly Cloudy

Tuesday

Tuesday: A chance of showers, with thunderstorms also possible after 4pm.  Partly sunny, with a high near 81. Calm wind becoming south around 5 mph in the morning.  Chance of precipitation is 40%.
Slight Chance
Showers then
Chance
T-storms
Tuesday
Night
Tuesday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers.  Mostly cloudy, with a low around 65. South wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 30%.
Chance
T-storms then
Chance
Showers
Wednesday

Wednesday: Mostly sunny, with a high near 81. Calm wind becoming northeast around 5 mph in the morning.
Mostly Sunny

Wednesday
Night
Wednesday Night: Mostly clear, with a low around 61. Northeast wind around 5 mph becoming calm  in the evening.
Mostly Clear

Thursday

Thursday: Mostly sunny, with a high near 81. Calm wind becoming east around 5 mph in the morning.
Mostly Sunny

Thursday
Night
Thursday Night: Partly cloudy, with a low around 63.
Partly Cloudy

Lo 58 °F Hi 78 °F Lo 61 °F Hi 81 °F Lo 65 °F Hi 81 °F Lo 61 °F Hi 81 °F Lo 63 °F

Hazardous Weather Outlook
 

Overnight
 
Patchy fog after 3am. Otherwise, partly cloudy, with a low around 58. North wind around 5 mph.
Monday
 
Sunny, with a high near 78. North wind around 5 mph.
Monday Night
 
Partly cloudy, with a low around 61. East wind around 5 mph becoming calm in the evening.
Tuesday
 
A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 81. Calm wind becoming south around 5 mph in the morning. Chance of precipitation is 40%.
Tuesday Night
 
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 65. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Wednesday
 
Mostly sunny, with a high near 81. Calm wind becoming northeast around 5 mph in the morning.
Wednesday Night
 
Mostly clear, with a low around 61. Northeast wind around 5 mph becoming calm in the evening.
Thursday
 
Mostly sunny, with a high near 81. Calm wind becoming east around 5 mph in the morning.
Thursday Night
 
Partly cloudy, with a low around 63.
Friday
 
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Chance of precipitation is 40%.
Friday Night
 
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Saturday
 
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
Saturday Night
 
A 20 percent chance of showers. Partly cloudy, with a low around 64.
Sunday
 
A 20 percent chance of showers. Sunny, with a high near 84.

 

Forecast from NOAA-NWS for Brookfield WI.

Weather Forecast Discussion
310
FXUS63 KMKX 070254
AFDMKX

Area Forecast Discussion
National Weather Service Milwaukee/Sullivan WI
954 PM CDT Sun Jul 6 2025

.KEY MESSAGES...

- High swim risk expected tonight at Milwaukee, Racine, and
  Kenosha County beaches. Moderate swim risk expected during
  the same time period at Sheboygan and Ozaukee County beaches.

- Gusty winds and elevated wave heights will lead to Small Craft
  Advisory conditions in nearshore zones tonight.

- Drier and more comfortable air settles into southern
  Wisconsin tonight through Monday.

- Humidity and shower/storm chances return Tuesday through late
  week. Tuesday through early Wednesday and Friday through
  Saturday are currently favored for the best shower and storm
  chances.

&&

.UPDATE...
Issued 944 PM CDT Sun Jul 6 2025

Some lingering lower clouds across southeast WI late this
evening. Otherwise looking at light northerly winds and cooler
temps to spread in overnight. Expecting overnight lows to dip
into the upper 50s to around 60s under the mostly clear skies,
but pockets of clouds may keep a few location a smidge warmer in
the low 60s. The high swim risk conditions continue for
southeastern WI beaches overnight, but will improve into Monday
morning as winds ease and shift more northerly. Otherwise, no
major changes to the previous forecast.

Wagner

&&

.SHORT TERM...
Issued 234 PM CDT Sun Jul 6 2025

Tonight and Monday night:

An upper level trough and exiting cold front continues to allow
for showers and storms to develop. Isolated to scattered showers
and storms are moving southeast through south central and
eastern Wisconsin. Dewpoints and PWATs remain elevated along and
south of the front, so any shower will produce some efficient
rainfall. Showers are also very slow moving. The mid to upper
level wave will be the main forcing mechanism over southern
Wisconsin through this afternoon and early evening.

Conditions will dry out heading into tonight as the low pressure
and cold front pull away to the east. High pressure and a weak
ridge will move in behind this exiting system. Under the
clearing skies and light winds tonight, fog will be possible
across southern Wisconsin. The multiple days of rain have kept
the ground saturated. Fog is expected to be patchy. Dewpoints
will gradually diminish throughout the day Monday. Guidance
keeps hinting a nebulous area of lift in the mid levels moving
through Monday afternoon. This lift combined with diurnal mixing
and heating should create just enough lift for the environment
to try to produce some light rain. This area of lift should
largely stay north and west of the forecast area, but it will
try to squeeze out the last of the moisture. A few CAMs members
show these isolated showers popping up and falling apart very
quickly. Capped POPs at 15% for the far western portion of our
forecast area, to highlight the very small risk of a few showers
moving in. Otherwise dry weather and cooler conditions are
expected through Monday night.

Patterson

&&

.LONG TERM...
Issued 234 PM CDT Sun Jul 6 2025

Tuesday through Sunday:

An upper level trough is expected to move through the northern Great
Lakes Region Tuesday. This trough will be dropping down from
Saskatchewan Canada and guidance still have differences in the exact
placement of this trough, but there has been consistency in PVA
moving through the state. Ahead of the incoming upper level trough,
winds will shift to southwesterly. WAA and southerly winds will
bring dewpoints back up and increase temperatures slightly. Forecast
soundings show the column moistening throughout the morning and into
the afternoon. So despite some sfc high pressure across Wisconsin
there should be enough moisture and upper level lift to generate
rain chance for southern Wisconsin. There will be a chance for some
thunderstorms and a bit more organized convection as diurnal
heating leads to more instability in the afternoon and shear
should be good enough to support storms. PWATs are also going to
be high again during this time with values of 1.5 to near 2
inches. Comparing this to sounding climatology as PWATs get
closer to 2 inches that will be near the Daily Maximum for both
GRB and DVN. While there will be broad lift, moisture and a
little bit of instability and shear, the overall set up is
fairly week so not anticipating much if any severe weather.

For mid to late week there will be more low chances for rain as
multiple shortwaves move through the larger flow and ride the
ridge. Guidance is still showing uncertainty with these smaller
shortwaves for Wednesday and Thursday which is bringing in low
POPs around 10 to 15% at times. Friday into Saturday will be the
next better chance for rain and storms to return. A stronger
trough will be advecting down from the Pacific NW and Canada
toward the Great Lakes Region. Timing and track are still in
question, but this system will likely bring our next decent
chance for rain and storms.

Patterson

&&

.AVIATION...
Issued 954 PM CDT Sun Jul 6 2025

There continues to be swath of lower MVFR ceilings lingering in
far southeast WI this evening and may see additional MVFR
ceilings bleed in off of Lake Michigan. Thus MKE and ENW and
potentially even JVL will see these lower ceilings for another
couple of hours. Otherwise, VFR conditions will prevail later
tonight with light northerly winds as high pressure works its
way into the region for Monday.

Wagner

&&

.MARINE...
Issued 234 PM CDT Sun Jul 6 2025

The cold front across south central Wisconsin will continue
southeastward and is expected to clear the lake this evening.
Scattered rain and thunderstorms will be possible along and
behind the front. The rain will linger across the southeastern
portion of the Lake through tonight. Breezy north to northeast
winds are expected behind the frontal boundary with gusts of 20
to 26 kts. A Small Craft Advisory is in effect for all of the
southern Wisconsin nearshore zones due to the gusty winds and
increasing waves. A Moderate swim risk is expected across
Sheboygan and Ozaukee Co with a High swim risk across Milwaukee,
Racine and Kenosha Cos. The swim risk and the Small Craft
Advisory will persist into tonight when high pressure builds in
and winds weaken.

High pressure centered over the Canadian Great Plains will
advance into the western Great Lakes Region during the day on
Monday. Winds will weak and remain out of the north during this
time. The high will cross Lake Michigan Monday night, resulting
in light and variable surface winds. Periods of unsettled
weather will return Tuesday afternoon through late week as a
broad area of 29.5 inch low pressure migrates from the Rocky
Mountains into the Great Plains. Tuesday afternoon through early
Wednesday and Friday through Saturday are currently favored for
the best shower and thunderstorm chances.

Patterson

&&

.MKX WATCHES/WARNINGS/ADVISORIES...
WI...Beach Hazards Statement...WIZ066-WIZ071-WIZ072 until 7 AM
     Monday.

LM...Small Craft Advisory...LMZ643 until 1 AM Monday.

     Small Craft Advisory...LMZ644-LMZ645-LMZ646 until 7 AM Monday.

&&

$$

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