Port St. Lucie, Florida Weather
Thunder quiets the land. Day 93 of summer. Read this microseason across nine climate regions →
Port St. Lucie weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 10:01 AM EDT · Open-Meteo
- TodaySep 21Heavy Showers later40%2.4″83°74°—
- TuesdaySep 22Overcast35%—84°73°+1°
- WednesdaySep 23Light Showers72%0.01″85°75°+1°
- ThursdaySep 24Heavy Drizzle59%—86°74°+1°
- FridaySep 25Light Drizzle44%—85°73°-1°
- SaturdaySep 26Light Drizzle32%—83°74°-2°
- SundaySep 27Overcast26%—83°72°0°
Air quality now AQI 41 · Good
AQI 41 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±4 points).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 4.9 µg/m³ (AQI 27) with a 0.77 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 0.77
- Wind
- calm
- 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).
September dries up ditches or breaks down bridges.
- Moonrise
- 4:22 PM
- Moonset
- 2:16 AM
- In sign
- ♑︎ Capricorn
Thunder quiets the land
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Port St. Lucie at a glance
- Today vs. normal: Today averages 79°F (high 83°F, low 74°F), 2°F below the 81°F normal for Sep 21
- Last frost: None in most years — 32°F in 2% of 1991–2020 years (NOAA station 17 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant lettuce, peas, spinach, tomatoes, peppers, beans, squash; harvest summer squash, winter squash
16-Day Forecast — Port St. Lucie
- Mon83°74°40%
- Tue84°73°35%
- Wed85°75°72%
- Thu86°74°59%
- Fri85°73°44%
- Sat83°74°32%
- Sun83°72°26%
- Mon84°72°30%
- Tue87°73°35%
- Wed87°75°50%
- Thu87°76°51%
- Fri87°76°68%
- Sat87°76°65%
- Sun90°76°74%
- Mon91°76°74%
- Tue86°74°75%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Port St. Lucie
Interactive wind and temperature map centered on Port St. Lucie — it loads in your browser. Open the full weather map.
Right now in the garden
Year-round growing
As of September 21, sowing here runs through the year. Freezes are uncommon, so there is no frost date to plan around; heat and rainfall set the calendar instead. This city's planting calendar for September: plant lettuce, peas, spinach, tomatoes, peppers, beans, and squash; harvest summer squash and winter squash.
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.
Sun & seasons in Port St. Lucie
Port St. Lucie sits in St. Lucie County, where the year’s longest day runs 13h 52m of daylight and its shortest just 10h 25m — a swing of +3h 27m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Miami, the state’s largest city, lies about 104 miles to the S. The nearest town Port St. Lucie tracks is Palm Bay, roughly 50 miles to the NNW.
Air quality in Port St. Lucie
Air quality in Port St. Lucie’s county has held roughly steady since 2020; its cleanest year on record was 2020 (median AQI 33). See the full air-quality history for Port St. Lucie.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| February | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| March | radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| April | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| May | squash | tomatoes, peppers, beans, summer squash, winter squash |
| June | peppers, squash | tomatoes, peppers, beans, summer squash, winter squash |
| July | tomatoes, peppers, squash | tomatoes, peppers, summer squash, winter squash |
| August | peas, tomatoes, peppers, beans, squash | summer squash, winter squash |
| September | lettuce, peas, spinach, tomatoes, peppers, beans, squash | summer squash, winter squash |
| October | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | peppers, beans, summer squash, winter squash |
| November | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| December | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
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).
| Month | Mean temp | Precip |
|---|---|---|
| January | 65° | 3.1″ |
| February | 67° | 2.6″ |
| March | 70° | 3.7″ |
| April | 74° | 2.8″ |
| May | 78° | 4.8″ |
| June | 82° | 7.0″ |
| July | 83° | 5.9″ |
| August | 83° | 7.9″ |
| September | 82° | 9.2″ |
| October | 79° | 5.8″ |
| November | 73° | 3.4″ |
| December | 68° | 2.8″ |
Regional context
Similar climates River Park, FL, White City, FL, Indian River Estates, FL
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.
Precipitation in Port St. Lucie runs summer-dominant: September averages 9.2 inches from warm-season storms, while February drops to 2.6 inches under 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. Port St. Lucie's open lawns chill fastest on clear nights.
Similar climates: River Park, FL, White City, FL, Indian River Estates, FL, North River Shores, FL, Fort Pierce South, FL.
Frequently asked
- When does it freeze in Port St. Lucie?
- Most years Port St. Lucie doesn't freeze: the nearest NOAA station reached 32°F in 2% of 1991–2020 years, so Port St. Lucie has no reliable frost date.
- 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?
- Any season works in Port St. Lucie: without a reliable freeze, Port St. Lucie's heat, not frost, decides when greens and tomatoes do best.
- 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.
Port St. Lucie sits at 27.3°N; its climate zone is humid subtropical (Köppen approximation).
ZIP codes in Port St. Lucie
- 34952
- 34953
- 34983
- 34984
- 34985
- 34986
- 34987