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Greendale, Wisconsin Weather

Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →

Greendale weather forecast — hour by hour, 7-day outlook, NOAA radar

Greendale, WI
Saturday, July 4 at 11:32 AM
81
°
Overcast
Feels like
92°
Humidity
77%
Wind
5 mph
Sunrise
12:18 AM
Sunset
3:34 PM
Greendale, WI
Hour by hour · 24h
24-Hour ForecastGreendale, WI: 24-hour forecast. Temperatures range from 62 to 80 degrees Fahrenheit with a 21% chance of precipitation at 3 PM.
L 62°H 80°
Greendale, WI
7-day forecast
  1. Today
    Jul 4
    Light Drizzle
    45%
    0.01″
    80°65°—
  2. Sunday
    Jul 5
    Overcast
    10%
    —
    79°62°-1°
  3. Monday
    Jul 6
    Overcast
    —
    —
    73°59°-6°
  4. Tuesday
    Jul 7
    Overcast
    —
    —
    78°58°+5°
  5. Wednesday
    Jul 8
    Overcast
    21%
    —
    80°60°+2°
  6. Thursday
    Jul 9
    Light Showers
    48%
    0.03″
    73°63°-7°
  7. Friday
    Jul 10
    Partly Cloudy
    35%
    —
    74°61°+1°
Greendale, WI
Next 24 hours · Warm now
58°71°84°6a12p6p12anow 80°high 80°low 62°PRECIP %
Greendale, WI
Anemometer · 24h winds · from true
NESW
From · True
ENE
057° · veering 178°
Direction
ENE
057°
Sustained
5
mph
Gust
10
mph
Peak 24h
13
avg 6
Beaufort · 2 · LIGHT BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 6 · pk 13 @ 5:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 178SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 178° from the ene.
Greendale, WI
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
984.9
-0.3 mb in 3h · steady · 29.08 inHg
Now
984.9
mb
3h
-0.3
mb
12h
-0.4
mb
24h
-3.1
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 984–988
9809859909951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW987.6984.2984.5
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Greendale, WI
Air quality
37
AQI
Good
→+1 in 6h▲Peak ~49 @ 11 PM

AQI 37 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 10.2 µg/m³ (AQI 53) with a 0.92 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.

PM 2.5DRIVERGood
10.2μg/m³
PM 10Good
11μg/m³
NO₂Good
8μg/m³
OzoneModerate
84μg/m³
UV IndexHigh
5.7

What's driving it

Ozone × UV × Sky

Ozone at AQI 40 now. With UV 6.6 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 25 around 1 PM.

Present
AQI 40
UV peak
6.6 at 1 PM
Sky at peak
partly cloudy
Projected peak
AQI 25

PM × Wind × Precip

PM2.5 at 10.2 µg/m³ (AQI 53) with a 0.92 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.

PM2.5/PM10
0.92
Wind
light
Recent rain
0h in last 6h
Pattern
stagnant smoke

Trends

Seven days of AQI and PM2.5.

Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).

7-DAY AQI TREND50100SATSUNMONTUEWEDTHUFRISAT7-DAY PM2.5 TREND · μg/m³340
Greendale, WI
Sky cover · visibility · 24h
Cloud cover
85%
MOSTLY CLOUDY
100%0%−24h−18h−12h−6hnow
Visibility
43.4mi
UNLIMITED
65 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
16:32 UTC · Greendale, WI · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
16:32 UTC · Greendale, WI · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Greendale, WI
Satellite · infrared · animated
Greendale, WI
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Greendale, WI
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
4:44 AM
Sunrise
12:18 AM
Daylight
15h 16m
Sunset
3:34 PM
Civil dusk
9:10 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Greendale, WI
The moon
Waning Gibbous
80% illuminated
Moonrise
10:51 PM
Moonset
9:54 AM
In sign
♓︎ Pisces
Greendale, WI
Microseason
Jul 1–5

Cicadas claim the afternoon

plant
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Greendale at a glance

  • Today vs. normal: 12°F above the seasonal normal for this latitude
  • Last frost: May 4 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 53129

16-Day Forecast — Greendale

  1. Sat78°65°45%
  2. Sun79°62°10%
  3. Mon73°59°1%
  4. Tue78°58°1%
  5. Wed80°60°21%
  6. Thu73°63°48%
  7. Fri74°61°35%
  8. Sat81°60°8%
  9. Sun65°59°10%
  10. Mon73°59°8%
  11. Tue75°61°8%
  12. Wed79°63°23%
  13. Thu83°66°14%
  14. Fri83°67°14%
  15. Sat81°67°23%
  16. Sun85°66°29%

Forecast data from Open-Meteo (CC BY 4.0).

Right now in the garden

Peak growing season

As of July 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.

SPC Convective Outlook

Storm Prediction Center — Greendale

SPC includes Greendale in the general thunderstorm area today — no severe risk, but storms are possible.

  • TODAYTSTMGeneral Thunderstorms
  • TOMORROWTSTMGeneral Thunderstorms
  • DAY 3NONENo severe risk

Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.

Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.

January 1–5: The year turns in silence.January 6–10: Ice thickens on still water.January 11–15: Shortest shadows lengthen.January 16–20: Pheasants begin to call.January 21–25: Springs begin to thaw.January 26–31: Chickadees announce dawn.February 1–5: East wind softens the frost.February 6–10: Sap begins to rise.February 11–15: First snowdrops appear.February 16–20: Red-winged blackbirds return.February 21–25: Rain begins to replace snow.February 26–28: Skunk cabbage pushes through ice.March 1–5: Ice withdraws from the reservoir.March 6–10: Crocuses open to weak sun.March 11–15: Peepers call from the marsh.March 16–20: Woodcocks spiral at dusk.March 21–25: Equinox — light overtakes dark.March 26–31: Forsythia opens along the fences.April 1–5: Cherry blossoms drift like snow.April 6–10: Warblers appear in the understory.April 11–15: Magnolias bloom and fall in a day.April 16–20: Dogwoods float above the forest.April 21–25: Lilacs perfume the evening.April 26–30: Last frost releases the garden.May 1–5: Warblers flood the Ramble.May 6–10: Tulip poplars light their candles.May 11–15: Shad run up the rivers.May 16–20: Roses open along the stoops.May 21–25: Firefly scouts appear at dusk.May 26–31: Strawberries ripen in the sun.June 1–5: Fireflies rise from the lawn.June 6–10: Elderflowers open in hedgerows.June 11–15: Solstice approaches — longest light.June 16–20: Honeysuckle sweetens the night.June 21–25: Solstice — the sun stands still.June 26–30: Lightning bugs drift through oaks.July 1–5: Cicadas claim the afternoon.July 6–10: Queen Anne's lace lines the roads.July 11–15: Thunder builds each afternoon.July 16–20: Corn reaches for the tassels.July 21–25: Dog days settle in the haze.July 26–31: Katydids begin their chorus.August 1–5: Night falls a minute earlier.August 6–10: Sunflowers face the morning.August 11–15: Goldenrod begins to bloom.August 16–20: Crickets pulse through warm nights.August 21–25: First cool morning surprises.August 26–31: Monarchs stage for flight.September 1–5: School buses reappear.September 6–10: Asters purple the roadsides.September 11–15: Hawk migration over the Hudson.September 16–20: Equinox — dark overtakes light.September 21–25: Apples hang heavy on the branch.September 26–30: Geese begin to chevron south.October 1–5: Witch hazel blooms as others fade.October 6–10: Maples begin to blaze.October 11–15: Frost paints the garden black.October 16–20: Oaks turn bronze and russet.October 21–25: Leaves rattle down the gutters.October 26–31: Clocks fall back — dusk at five.November 1–5: Ginkgos drop overnight.November 6–10: Last leaves cling stubbornly.November 11–15: Juncos arrive from the north.November 16–20: Bare branches reveal the sky.November 21–25: First flurries dust the rooftops.November 26–30: Woodsmoke curls through the block.December 1–5: Darkness settles before dinner.December 6–10: Holly and winterberry persist.December 11–15: Shortest day approaches.December 16–20: Ice begins to form at the edges.December 21–25: Solstice — the sun begins return.December 26–31: The year turns in silence.🌱February 14 — First skunk-cabbage spathes thaw their way up☀️March 20 — Spring equinox — day and night balance🌸April 5 — Cherry blossoms peak in the parks🐦May 10 — Warbler migration peaks along the coast✨May 25 — First fireflies scout the meadows at dusk🌞June 21 — Summer solstice — longest day🦗July 25 — Peak cicada chorus in the afternoons🌊August 18 — Warmest sea-surface temperatures of the year🍂September 22 — Autumn equinox — the slow turn❄️October 25 — First widespread frost in the suburbs🍁November 10 — Peak leaf color across the Hudson Valley🌙December 21 — Winter solstice — longest night

Microseason · July 1–5

Cicadas claim the afternoon

Annual cicada buzz begins, peaking in the heat of the day.

Day 185 of 365 · Wedge 37 of 72

The solar year drawn as a wheel of 72 five-day windows. Each wedge is one microseason; the four colored arcs mark winter, spring, summer, and autumn; the small icons sit at notable phenological events. The crimson pointer creeps clockwise as the year turns.

Planting calendar

MonthPlantHarvest
January——
February——
March——
April——
Maylettuce, peas, spinach, radisheslettuce, peas, radishes
Junelettuce, peas, spinach, radishes, tomatoes, peppers, beans, squashlettuce, peas, radishes
Julytomatoes, peppers, beans, squashtomatoes, beans, summer squash
Augusttomatoes, peppers, beans, squash, fall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
Septemberfall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
October—winter squash, tomatoes (last)
November——
December——

A year in weather

In Greendale, August runs warmest near 73°F and January coldest around 23°F, while May is the wettest month (3.7 inches) and January the driest (1.8 inches).

MonthMean tempPrecipRainy days
January23°1.8″18
February24°1.8″14
March32°2.6″16
April43°3.2″17
May52°3.7″18
June64°3.5″17
July73°2.6″15
August73°2.7″14
September67°3.1″14
October55°2.9″15
November40°3.1″15
December28°2.2″16

Regional context

Greendale's climate, from NOAA NCEI 1991-2020 station normals, pairs 23°F Januarys with 73°F Julys — a 50°F swing. About 33.1 inches of precipitation falls over roughly 189 days a year.

Rainfall in Greendale stays even across the calendar: May tops out at 3.7 inches over 18.0 rainy days, and January still logs 1.8 inches across 17.8 — a narrow range for Greendale. That even rhythm groups Greendale with places like Greenfield, WI, Hales Corners, WI and Franklin, WI.

The cool-season window in Greendale starts at late-May, when nights stop freezing — think kale, peas, spinach, and parsnips. In Greendale, warm-season transplants — tomatoes, peppers, basil — wait two weeks past Greendale's frost date. It shuts near early-October, when freezes return to Greendale and tender plants need cover. Within Greendale, cold-air pooling chills low spots by 5-10°F, shifting Greendale's local frost dates.

Similar climates: Greenfield, WI, Hales Corners, WI, Franklin, WI, West Allis, WI, West Milwaukee, WI.

Frequently asked

When does it freeze in Greendale?
Frost typically leaves Greendale by mid-May and returns to Greendale near mid-October.
What is the rainy season in Greendale?
Greendale sees its heaviest rain in May (around 3.7 inches), part of roughly 33 inches a year.
What is the warmest month in Greendale?
Greendale peaks in August, when the mean runs near 73°F.
What is the coldest month in Greendale?
January is Greendale's coldest month, averaging about 23°F.
When can I start a vegetable garden in Greendale?
In Greendale, sow peas and hardy greens around mid-May; Greendale's tomatoes and peppers wait two weeks more.
How many rainy days does Greendale get?
Greendale records around 189 days of measurable precipitation annually.
What hardiness zone is Greendale?
Because Greendale bottoms near 23°F in January, that winter low sets Greendale's USDA zone — verify by ZIP.
What is the 10-day forecast for Greendale?
Greendale's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
Will it rain this week in Greendale?
See this week's day-by-day rain chances for Greendale in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Greendale?
Current conditions for Greendale and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Greendale forecast updated?
The Greendale forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Greendale?
Today's sunrise and sunset times for Greendale are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
How accurate is the weather forecast for Greendale?
The next few days in Greendale's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

The warm-summer humid continental climate of Greendale, Wisconsin carries typical Januarys near 23°F and Julys around 73°F — 50°F of seasonal travel.

Across the year, Greendale collects about 33 inches of precipitation over roughly 189 days with measurable rain or snow.

Greendale sits at 42.9°N; that 50°F seasonal swing frames planting windows and frost dates across Greendale.

All cities in Wisconsin →

Milwaukee, WI weather →

ZIP codes in Greendale

  • 53129

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.