Weather in Port St. Lucie, Florida
Roses open on the Piedmont edge. Day 58 of spring. Read this microseason across nine climate regions →
Flowers blooming in late autumn, a sure sign of a bad winter coming.
- Moonrise
- 9:59 AM
- Moonset
- —
- In sign
- ♉︎ Taurus
Roses open on the Piedmont edge
Port St. Lucie at a glance
- Today vs. normal: NaN°F below the seasonal normal for this latitude
- Last frost: January 30 (climatological average for this latitude)
- Microseason: 28 of 72, May 16–20
- Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.
Right now in the garden
Peak growing season
As of May 16, 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.
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.