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Port St. Lucie, Florida Weather

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

Port St. Lucie weather forecast — hour by hour, 7-day outlook, NOAA radar

Port St. Lucie, FL
Saturday, July 4 at 4:18 PM
81
°
Heavy Drizzle
Feels like
84°
Humidity
65%
Wind
8 mph
Sunrise
2:31 AM
Sunset
4:20 PM
Port St. Lucie, FL
Hour by hour · 24h
24-Hour ForecastPort St. Lucie, FL: 24-hour forecast. Temperatures range from 76 to 88 degrees Fahrenheit with a 35% chance of precipitation at 7 PM.
L 76°H 88°
Port St. Lucie, FL
7-day forecast
  1. Today
    Jul 4
    Showers
    35%
    0.15″
    94°76°—
  2. Sunday
    Jul 5
    Overcast
    28%
    —
    88°75°-6°
  3. Monday
    Jul 6
    Thunderstorm
    83%
    —
    94°74°+6°
  4. Tuesday
    Jul 7
    Drizzle
    64%
    —
    92°73°-2°
  5. Wednesday
    Jul 8
    Thunderstorm
    36%
    —
    94°75°+2°
  6. Thursday
    Jul 9
    Light Drizzle
    19%
    —
    92°75°-2°
  7. Friday
    Jul 10
    Thunderstorm
    26%
    0.13″
    91°76°-1°
Port St. Lucie, FL
Next 24 hours · Mild now
HOT 90°74°83°92°12p6p12a6anow 79°high 88°low 76°PRECIP %
Port St. Lucie, FL
Anemometer · 24h winds · from true
NESW
From · True
ESE
112° · steady
Direction
ESE
112°
Sustained
8
mph
Gust
14
mph
Peak 24h
14
avg 4
Beaufort · 3 · GENTLE 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 4 · pk 14 @ 7:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 147SUSTGUST
−24h−18h−12h−6hnow
Light breeze holding from the ese.
Port St. Lucie, FL
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1015.6
-0.8 mb in 3h · falling · 29.99 inHg
Now
1015.6
mb
3h
-0.8
mb
12h
0.0
mb
24h
-0.2
mb
Regime · FAIR
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1015–1017
1010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY-21h-18h-15h-12h-9h-6h-3h-24hNOW1017.21015.41015.7
−24h−18h−12h−6hnow
Fair, steady air — a quiet anticyclone holds the sky.
Port St. Lucie, FL
Air quality
35
AQI
Good
→+2 in 6h

AQI 35 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 41 — peak already passed at 1 PM under clear skies. Levels should ease through evening.

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

PM 2.5Good
6.3μg/m³
PM 10Good
9μg/m³
NO₂Good
1μg/m³
OzoneDRIVERModerate
86μg/m³
UV IndexModerate
3.0

What's driving it

Ozone × UV × Sky

Ozone at AQI 41 — peak already passed at 1 PM under clear skies. Levels should ease through evening.

Present
AQI 41
UV peak
2.7 at earlier today
Sky at peak
clear
Projected peak
AQI 41

PM × Wind × Precip

PM scrubbed by 2 hours of recent rain — PM2.5 down to 6.3 µg/m³, PM10 to 8.9 µg/m³.

PM2.5/PM10
0.71
Wind
light
Recent rain
2h in last 6h
Pattern
washed out

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/m³300
Port St. Lucie, FL
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow
Visibility
27.7mi
UNLIMITED
76 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
20:18 UTC · Port St. Lucie, FL · 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
20:18 UTC · Port St. Lucie, FL · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Port St. Lucie, FL
Satellite · infrared · animated
Port St. Lucie, FL
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Port St. Lucie, FL
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
6:06 AM
Sunrise
2:31 AM
Daylight
13h 49m
Sunset
4:20 PM
Civil dusk
8:47 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Port St. Lucie, FL
The moon
Waning Gibbous
79% illuminated
Moonrise
10:59 PM
Moonset
10:38 AM
In sign
♓︎ Pisces
Port St. Lucie, FL
Microseason
Jul 1–5

Cicadas claim the scorching afternoon

bird
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Port St. Lucie at a glance

  • Today vs. normal: 3°F below the seasonal normal for this latitude
  • Last frost: January 30 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

16-Day Forecast — Port St. Lucie

  1. Sat94°76°35%
  2. Sun88°75°28%
  3. Mon94°74°83%
  4. Tue92°73°64%
  5. Wed94°75°36%
  6. Thu92°75°19%
  7. Fri91°76°26%
  8. Sat94°72°40%
  9. Sun93°75°33%
  10. Mon94°76°30%
  11. Tue92°76°34%
  12. Wed90°79°61%
  13. Thu90°80°51%
  14. Fri91°79°33%
  15. Sat92°80°47%
  16. Sun92°79°69%

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

Live wind & temperature near Port St. Lucie

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 — Port St. Lucie

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

  • TODAYTSTMGeneral Thunderstorms
  • 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: Frost quiets the live oaks.January 6–10: Still water thickens with ice.January 11–15: Springs begin to move beneath ice.January 16–20: Cardinal dawn calls grow bolder.January 21–25: Late January thaw pulses.January 26–31: Last freeze locks the land.February 1–5: February's lengthening light.February 6–10: Warming winds thaw the margin.February 11–15: Magnolia blooms break the gray.February 16–20: Mockingbirds resume the dawn chorus.February 21–25: Rain replaces the last snow.February 26–28: Mist clings to greening valleys.March 1–5: The green pulse awakens.March 6–10: Hibernators emerge to call.March 11–15: Dogwood and redbud ignite.March 16–20: Swallowtails emerge from winter silk.March 21–25: Light crowns the dogwood canopy.March 26–31: Redbud cascades over the thaw.April 1–5: Thunder announces the wet season.April 6–10: Barn swallows carve the warming sky.April 11–15: Magnolia blooms and falls in a breath.April 16–20: First rainbows arch over thunderheads.April 21–25: Reeds push through marsh water.April 26–30: Frost retreats; seedlings rise free.May 1–5: Warblers flood the canopy in waves.May 6–10: Tulip poplar lights the forest crown.May 11–15: Shad pulse upstream through rapids.May 16–20: Roses open on the Piedmont edge.May 21–25: Fireflies scout the humid dusk.May 26–31: Frog choruses rise from every wetland.June 1–5: Fireflies pulse through the magnolias.June 6–10: Kudzu climbs deeper into green.June 11–15: Sun climbs to its northern throne.June 16–20: Heat settles and the rain begins.June 21–25: The longest day turns toward shadow.June 26–30: Fireflies drift through Spanish moss.July 1–5: Cicadas claim the scorching afternoon.July 6–10: Thunderheads boil and break at dusk.July 11–15: Thunder builds each drowsy afternoon.July 16–20: Cicadas claim the long noon.July 21–25: Dog days drape the earth in haze.July 26–31: Katydids begin their rasping chorus.August 1–5: Dusk arrives one minute earlier each night.August 6–10: Meteorological summer's turning page.August 11–15: Cool winds gather at the margins.August 16–20: Dog-day cicadas rise.August 21–25: Heat breaks in creek beds.August 26–31: Monarchs gather strength.September 1–5: Harvests begin in earnest.September 6–10: Dew beads on resurrection fern.September 11–15: Raptors trail the thermals.September 16–20: Day and dark find balance.September 21–25: Thunder quiets the land.September 26–30: Insects retreat below.October 1–5: Swamp waters recede.October 6–10: Maples ignite the ridge.October 11–15: Asters crown the meadows.October 16–20: Crickets sing at dusk.October 21–25: Frost paints the garden.October 26–31: Light rains whisper down.November 1–5: Sweetgum Turns Crimson.November 6–10: Camellia Blooms Break Through.November 11–15: Earth Stiffens Underfoot.November 16–20: Bare Limbs Hold the Light.November 21–25: First Frost Grips the High Ground.November 26–30: North Wind Strips the Last Leaves.December 1–5: Darkness Falls Before Dinner.December 6–10: Winter Locks the Land.December 11–15: Wildlife Retreats to Shelter.December 16–20: Ice Edges Deepen Inward.December 21–25: The Sun Begins its 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 scorching afternoon

Dog-day cicadas emerge in waves, their rasp dominating every sunny hour; heat peaks above 90 degrees daily.

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——
Februarylettuce, peas, spinach, radishes—
Marchlettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash—
Apriltomatoes, peppers, beans, squash—
Maytomatoes, peppers, beans, squashlettuce, peas, radishes
June—lettuce, peas, radishes
July—tomatoes, beans, summer squash
August—tomatoes, beans, summer squash
September—tomatoes, beans, summer squash
Octoberfall brassicas, garlic (overwinter), carrotswinter squash, tomatoes (last)
Novemberfall brassicas, garlic (overwinter), carrots—
December——

A year in weather

Port St. Lucie peaks at about 83°F in August and bottoms near 65°F in January; September brings the heaviest rain (9.2 inches) and February the least (2.6 inches).

MonthMean tempPrecipRainy days
January65°3.1″10
February67°2.6″9
March70°3.7″12
April74°2.8″9
May78°4.8″16
June82°7.0″23
July83°5.9″20
August83°7.9″25
September82°9.2″25
October79°5.8″19
November73°3.4″11
December68°2.8″9

Regional context

Per NOAA NCEI 1991-2020 normals, Port St. Lucie runs from a 65°F January mean to 83°F in July, a 17°F seasonal spread, with near 58.9 inches of precipitation across about 188 wet days.

Precipitation in Port St. Lucie runs summer-dominant: September averages 9.2 inches across 25.0 days of warm-season storms, while February drops to 2.6 inches over 9.0 rainy days of drier cool air. That summer-storm rhythm groups Port St. Lucie with places like River Park, FL, White City, FL and Indian River Estates, FL.

Hard freezes are rare in Port St. Lucie: the coldest month averages 65°F, so Port St. Lucie's growing window runs most of the year. August is the hottest stretch near 83°F, pushing cool-season crops to the milder shoulder months. Within Port St. Lucie, low or inland lots lose 3-5°F overnight versus Port St. Lucie's coastal ground.

Similar climates: River Park, FL, White City, FL, Indian River Estates, FL, North River Shores, FL, Fort Pierce South, FL.

Naturalist notes

Late May brings the return of painted bunting males to local scrublands, their brilliant red and blue plumage signaling the height of breeding season.

Coontie plants begin releasing their bright orange seeds in June, providing food for wildlife as summer heat intensifies.

Frequently asked

When does it freeze in Port St. Lucie?
Frost typically leaves Port St. Lucie by mid-February and returns to Port St. Lucie near mid-December.
What is the rainy season in Port St. Lucie?
Rainfall in Port St. Lucie peaks in September near 9.2 inches, out of about 59 inches annually.
What is the warmest month in Port St. Lucie?
August is Port St. Lucie's warmest month, averaging about 83°F.
What is the coldest month in Port St. Lucie?
Port St. Lucie bottoms out in January, with a mean near 65°F.
When can I start a vegetable garden in Port St. Lucie?
Time tomatoes in Port St. Lucie for two weeks after mid-February; peas and greens start at Port St. Lucie's frost line.
How many rainy days does Port St. Lucie get?
Port St. Lucie averages about 188 days with measurable rain or snow each year.
What hardiness zone is Port St. Lucie?
Port St. Lucie's hardiness zone tracks its winter low; with January near 65°F, check the USDA ZIP map for the exact zone.
What is the 10-day forecast for Port St. Lucie?
Port St. Lucie'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 Port St. Lucie?
See this week's day-by-day rain chances for Port St. Lucie in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Port St. Lucie?
Current conditions for Port St. Lucie and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Port St. Lucie forecast updated?
The Port St. Lucie forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Port St. Lucie?
Today's sunrise and sunset times for Port St. Lucie 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 Port St. Lucie?
The next few days in Port St. Lucie's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Port St. Lucie's humid subtropical climate in Florida pairs 65°F Januarys with 83°F Julys, 18°F apart across the seasons.

Across the year, Port St. Lucie collects about 59 inches of precipitation over roughly 188 days with measurable rain or snow.

At 27.3°N, Port St. Lucie's 18°F summer-to-winter swing sets when Port St. Lucie's gardens wake and when frost returns.

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ZIP codes in Port St. Lucie

  • 34986
  • 34984
  • 34983
  • 34987
  • 34952
  • 34953
  • 34985

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.