Weather StoryAlmanac, microseasons, and the day's weather story.

Green Bay, Wisconsin Weather

Solstice approaches — longest light. Day 88 of spring. Read this microseason across nine climate regions →

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

Green Bay, WI
Monday, June 15 at 12:09 AM
53
°
Clear
Feels like
50°
Humidity
79%
Wind
5 mph
Sunrise
12:06 AM
Sunset
3:38 PM
Green Bay, WI
Hour by hour · 24h
24-Hour ForecastGreen Bay, WI: 24-hour forecast. Temperatures range from 49 to 77 degrees Fahrenheit.
L 49°H 77°
Green Bay, WI
7-day forecast
  1. Today
    Jun 15
    Overcast
    —
    —
    77°49°—
  2. Tuesday
    Jun 16
    Heavy Rain
    90%
    1.5″
    74°48°-3°
  3. Wednesday
    Jun 17
    Showers
    92%
    0.76″
    58°48°-16°
  4. Thursday
    Jun 18
    Light Showers
    92%
    0.07″
    70°52°+12°
  5. Friday
    Jun 19
    Light Drizzle
    19%
    —
    64°45°-6°
  6. Saturday
    Jun 20
    Light Drizzle
    23%
    —
    69°49°+5°
  7. Sunday
    Jun 21
    Mostly Clear
    21%
    —
    68°48°-1°
Green Bay, WI
Next 24 hours · Cool now
40°63°85°12a6a12p6pnow 53°high 77°low 49°
Green Bay, WI
Anemometer · 24h winds · from true
NESW
From · True
SSW
193° · backing 144°
Direction
SSW
193°
Sustained
5
mph
Gust
7
mph
Peak 24h
23
avg 9
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 9 · pk 23 @ 4:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 168SUSTGUST
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Green Bay, WI
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
991.8
+0.3 mb in 3h · steady · 29.29 inHg
Now
991.8
mb
3h
+0.3
mb
12h
+2.6
mb
24h
+4.6
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 987–992
9809859909951000STORM|RAIN-21h-18h-15h-12h-9h-6h-3h-24hNOW991.8987.0991.8
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Green Bay, WI
Air quality
29
AQI
Good
→0 in 6h

AQI 29 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 4.6 µg/m³ (AQI 26) with a 0.98 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
4.6μg/m³
PM 10Good
5μg/m³
NO₂Good
9μg/m³
OzoneGood
46μg/m³
UV IndexLow
0.0

What's driving it

PM × Wind × Precip

PM2.5 at 4.6 µg/m³ (AQI 26) with a 0.98 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.

PM2.5/PM10
0.98
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 TREND50100MONTUEWEDTHUFRISATSUNMON7-DAY PM2.5 TREND · μg/m³300
Green Bay, WI
Sky cover · visibility · 24h
Cloud cover
0%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
38.1mi
UNLIMITED
82 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
05:09 UTC · Green Bay, 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
05:09 UTC · Green Bay, WI · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Green Bay, WI
Satellite · infrared · animated
Green Bay, WI
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Green Bay, WI
Almanac · Monday, June 15
A summer fog for fair, a winter fog for rain.
Civil dawn
4:31 AM
Sunrise
12:06 AM
Daylight
15h 32m
Sunset
3:38 PM
Civil dusk
9:16 PM
Planting note
Stake and prune tomato suckers. Watch for squash vine borers.
Green Bay, WI
The moon
New Moon
0% illuminated
Moonrise
5:03 AM
Moonset
9:00 PM
In sign
♊︎ Gemini
Green Bay, WI
Microseason
Jun 11–15

Solstice approaches — longest light

cultural
Jan 145% of the yearDec 31

Read this microseason across nine climate regions →

Green Bay at a glance

  • Today vs. normal: 17°F below the seasonal normal for this latitude
  • Last frost: May 13 (climatological average for this latitude)
  • Microseason: Jun 11–15
  • Planting window: Stake and prune tomato suckers. Watch for squash vine borers.

15-Day Forecast — Green Bay

  1. Mon77°49°3%
  2. Tue74°48°90%
  3. Wed58°48°92%
  4. Thu70°52°92%
  5. Fri64°45°19%
  6. Sat69°49°23%
  7. Sun68°48°21%
  8. Mon71°51°15%
  9. Tue76°55°13%
  10. Wed76°58°30%
  11. Thu80°60°30%
  12. Fri83°63°42%
  13. Sat86°69°35%
  14. Sun83°69°26%
  15. Mon84°64°30%

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

Live wind & temperature near Green Bay

Right now in the garden

Peak growing season

As of June 15, 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 — Green Bay

SPC has placed Green Bay in the General Thunderstorms category for severe thunderstorms tomorrow.

  • TODAYNONENo severe risk
  • TOMORROWTSTMGeneral Thunderstorms
  • DAY 3TSTMGeneral Thunderstorms

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 · June 11–15

Solstice approaches — longest light

Sunrise before 5:30 AM; sunset nearly 8:30 PM.

Day 166 of 365 · Wedge 33 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

Green Bay's warmest month is July (~73°F mean) and its coldest is January (~18°F). Rainfall peaks in June (3.9 inches) and bottoms out in February (1.5 inches).

MonthMean tempPrecipRainy days
January18°1.5″16
February20°1.5″13
March30°2.2″15
April45°2.9″17
May55°3.4″18
June67°3.9″17
July73°3.0″14
August72°3.0″15
September64°3.6″15
October52°2.5″13
November35°2.7″14
December22°1.7″15

Regional context

Drawing on NOAA NCEI 1991-2020 normals, Green Bay's January averages 18°F and July 73°F — 56°F apart — while precipitation totals roughly 31.9 inches over some 183 days.

Summer convection drives Green Bay's precipitation: June logs 3.9 inches on 16.5 rainy days, against February's 1.5 inches on 13.3 — warm-season storms carry Green Bay's moisture. It is a warm-season-wet pattern Green Bay shares with places like Allouez, WI, Bellevue, WI and Ashwaubenon, WI.

Green Bay's growing window opens around late-May, once Green Bay's overnight lows stop freezing — sow kale, peas, spinach, and parsnips. In Green Bay, warm-season transplants — tomatoes, peppers, basil — wait two weeks past Green Bay's frost date. Around early-October, freezing nights resume in Green Bay and tender crops must come in. In Green Bay, low spots run 4-7°F colder than nearby slopes, nudging Green Bay's frost dates a week.

Similar climates: Allouez, WI, Bellevue, WI, Ashwaubenon, WI, Howard, WI, De Pere, WI.

Naturalist notes

American robins return to Green Bay lawns in late March, their red breasts signaling winter's retreat across Wisconsin.

Sugar maples begin leafing out in early May, their tender green unfurling as soil temperatures climb past the 45°F threshold.

Frequently asked

When does it freeze in Green Bay?
In Green Bay, expect the last spring frost near mid-May; Green Bay's first autumn frost comes around mid-October.
What is the rainy season in Green Bay?
Green Bay sees its heaviest rain in June (around 3.9 inches), part of roughly 32 inches a year.
What is the warmest month in Green Bay?
Green Bay peaks in July, when the mean runs near 73°F.
What is the coldest month in Green Bay?
January is Green Bay's coldest month, averaging about 18°F.
When can I start a vegetable garden in Green Bay?
Around mid-May, start frost-hardy crops in Green Bay; tomatoes and basil belong a fortnight later.
How many rainy days does Green Bay get?
Green Bay records around 183 days of measurable precipitation annually.
What hardiness zone is Green Bay?
Since January in Green Bay averages 18°F, Green Bay's USDA zone follows that floor — confirm it by ZIP.
What is the 10-day forecast for Green Bay?
Green Bay'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 Green Bay?
See this week's day-by-day rain chances for Green Bay in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Green Bay?
Current conditions for Green Bay and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Green Bay forecast updated?
The Green Bay forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Green Bay?
Day length in Green Bay peaks around the June solstice — earliest sunrise and latest sunset — and is shortest near the December solstice.
How accurate is the weather forecast for Green Bay?
The next few days in Green Bay's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Set in a warm-summer humid continental zone, Green Bay, Wisconsin swings from 18°F in the heart of winter to 73°F at midsummer — a 55°F arc.

In a typical year Green Bay records about 32 inches of precipitation on around 183 days.

Green Bay's 55°F range, set by its 44.5°N position, drives frost timing and what thrives in Green Bay.

All cities in Wisconsin →

Milwaukee, WI weather →

ZIP codes in Green Bay

  • 54304
  • 54303
  • 54302
  • 54301
  • 54311
  • 54305
  • 54306
  • 54308

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.