Port St. Lucie, Florida Weather
Fireflies pulse through the magnolias. Day 78 of spring. Read this microseason across nine climate regions →
Port St. Lucie weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——83°72°—
- FridayJun 5Overcast——85°70°+2°
- SaturdayJun 6Overcast——83°72°-2°
- SundayJun 7Light Drizzle——83°72°0°
- MondayJun 8Light Drizzle37%—86°75°+3°
- TuesdayJun 9Heavy Drizzle45%—87°75°+1°
- WednesdayJun 10Drizzle58%0.01″84°75°-3°
PM2.5 at 10.6 µg/m³ (AQI 54) with a 0.62 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust. 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
Ozone × UV × Sky
Ozone at AQI 41 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 7 by mid-afternoon.
- Present
- AQI 41
- UV peak
- 0.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 7
PM × Wind × Precip
PM2.5 at 10.6 µg/m³ (AQI 54) with a 0.62 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.62
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 3:53 AM
- Moonset
- 2:53 PM
- In sign
- ♒︎ Aquarius
Fireflies pulse through the magnolias
Port St. Lucie at a glance
- Today vs. normal: 11°F below the seasonal normal for this latitude
- Last frost: January 30 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 5, 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 has placed Port St. Lucie in the General Thunderstorms category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- 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.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | lettuce, peas, spinach, radishes | — |
| March | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| April | tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | — | lettuce, peas, radishes |
| July | — | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | — | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | fall brassicas, garlic (overwinter), carrots | — |
| December | — | — |
A year in weather
August brings Port St. Lucie's peak heat with mean temperatures around 83°F, while January delivers the coolest weather at roughly 65°F. September produces the heaviest rainfall at 9.2 inches, contrasting sharply with February's dry period of just 2.6 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 65° | 3.1″ | 10 |
| February | 67° | 2.6″ | 9 |
| March | 70° | 3.7″ | 12 |
| April | 74° | 2.8″ | 9 |
| May | 78° | 4.8″ | 16 |
| June | 82° | 7.0″ | 23 |
| July | 83° | 5.9″ | 20 |
| August | 83° | 7.9″ | 25 |
| September | 82° | 9.2″ | 25 |
| October | 79° | 5.8″ | 19 |
| November | 73° | 3.4″ | 11 |
| December | 68° | 2.8″ | 9 |
Regional context
Port St. Lucie falls within the broader humid subtropical climate region, sharing temperature ranges, seasonal rhythms, and growing conditions with other nearby cities in this climatic zone.
Similar climates: Miami, FL, Tampa, FL, Orlando, FL, Jacksonville, FL, Cape Coral, 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?
- Port St. Lucie typically sees its last spring frost around mid-February, while the first fall frost generally occurs around mid-December.
- What is the rainy season in Port St. Lucie?
- September stands as the wettest month, delivering approximately 9.2 inches of rain on average, contributing to the city's annual total of roughly 59 inches.
- What is the warmest month in Port St. Lucie?
- August typically brings the highest temperatures, with averages around 83°F.
- What is the coldest month in Port St. Lucie?
- January usually provides the coolest weather, averaging approximately 65°F.
- When can I start a vegetable garden in Port St. Lucie?
- Cool-season crops like peas and lettuce can be planted around the last spring frost in mid-February, while warm-season crops such as tomatoes and peppers should wait until 1–2 weeks after.
- How many rainy days does Port St. Lucie get?
- Port St. Lucie experiences approximately 188 rainy days annually.
- What hardiness zone is Port St. Lucie?
- Port St. Lucie's USDA hardiness zone depends on its lowest average winter temperatures; the USDA's online lookup tool using the city ZIP code will provide the current zone designation.
Climate
Port St. Lucie, Florida experiences a humid subtropical climate zone. Winter temperatures in January hover near 65°F while July averages reach 83°F — creating a 17°F seasonal swing.
Annual precipitation totals about 59 inches across roughly 188 rainy days throughout the year.
Location at 27.3°N latitude, along with proximity to large water bodies and local elevation, determines the growing patterns, frost timing, and daily weather conditions that define this area.