Port Saint Lucie climate
Port Saint Lucie (Florida, United States) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 23 °C74 °F, and about 1,275 mm50 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Port Saint Lucie climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2272 | 1254 | 1763 | 512.0 |
| Feb | 2475 | 1457 | 1966 | 481.9 |
| Mar | 2679 | 1660 | 2170 | 612.4 |
| Apr | 2983 | 1865 | 2474 | 622.4 |
| May | 3187 | 2170 | 2679 | 1114.4 |
| Jun | 3187 | 2475 | 2781 | 1917.5 |
| Jul | 3187 | 2476 | 2882 | 1716.7 |
| Aug | 3187 | 2577 | 2882 | 1937.6 |
| Sep | 3085 | 2475 | 2780 | 1726.8 |
| Oct | 2882 | 2170 | 2576 | 1024.0 |
| Nov | 2577 | 1763 | 2170 | 522.1 |
| Dec | 2374 | 1559 | 1966 | 602.4 |
| Year | 3187 | 1254 | 2374 | 1,27550 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 77% | 46% | 3.5 | 10:36 |
| Feb | 76% | 46% | 4.3 | 11:12 |
| Mar | 71% | 41% | 5.3 | 11:56 |
| Apr | 69% | 40% | 6.1 | 12:47 |
| May | 70% | 42% | 6.4 | 13:29 |
| Jun | 79% | 57% | 5.9 | 13:51 |
| Jul | 81% | 56% | 5.9 | 13:42 |
| Aug | 82% | 53% | 5.6 | 13:06 |
| Sep | 84% | 55% | 5.0 | 12:17 |
| Oct | 81% | 45% | 4.4 | 11:28 |
| Nov | 79% | 43% | 3.6 | 10:46 |
| Dec | 80% | 47% | 3.2 | 10:26 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Port Saint Lucie is like
The warmest month is August, with an average high of 31 °C87 °F and a low of 25 °C77 °F. The coldest is January, when highs average 22 °C72 °F and lows 12 °C54 °F. There is a clear seasonal cycle, with 10.5 °C19 °F between the average temperature of the warmest and the coolest month.
It is wet, with about 1,275 mm50 in of precipitation per year. The wettest three-month stretch is June–August, which brings 44% of the annual total. The wettest month is August (193 mm7.6 in), the driest is February (48 mm1.9 in).
Relative humidity ranges from 69% in April to 84% in September. The clearest skies (lowest average cloud amount, 40%) are typical of April. Average wind speed near the ground ranges from 6 km/h (4 mph) in July to 11 km/h (7 mph) in March. Daylight lasts from about 10.4 hours in December to 13.9 hours in June.
Best time to visit Port Saint Lucie
Based on these averages, the most comfortable months for sightseeing and outdoor activities are November–April: average highs of 22 °C72 °F to 29 °C83 °F with 48 mm1.9 in to 62 mm2.4 in of precipitation per month.
The most challenging month is August, which is hot, with average highs of 31 °C87 °F, very wet (193 mm7.6 in) and humid (82% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Port Saint Lucie
- Winter (December–February) — highs 2272 to 24 °C75 °F, lows 1254 to 15 °C59 °F, about 53 mm2.1 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket.
- Spring (March–May) — highs 2679 to 31 °C87 °F, lows 1660 to 21 °C70 °F, about 78 mm3.1 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses.
- Summer (June–August) — highs around 31 °C87 °F, lows 2475 to 25 °C77 °F, about 185 mm7.3 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and an umbrella or light rain jacket.
- Autumn (September–November) — highs 2577 to 30 °C85 °F, lows 1763 to 24 °C75 °F, about 109 mm4.3 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
How Port Saint Lucie compares
Compared with Fort Lauderdale, about 132 km to the south, Port Saint Lucie is on average 2.1 °C3.7 °F cooler and receives a similar amount of precipitation. The difference is largest in January (4 °C7.3 °F cooler).
Of the 222 places in the United States covered by World Climates, Port Saint Lucie is the 8th warmest by annual mean temperature and the 40th wettest by annual precipitation. See all of them on the United States climate page.
Places in other countries with the most similar temperature and rainfall pattern: Toufen (Taiwan, Cfa), Haimen (China, Cfa) and Maoming (China, Cfa).
Nearby places
- West Palm Beach 71 km · 25 °C77 °F · 1,342 mm53 in
- Palm Bay 86 km · 23 °C74 °F · 1,377 mm54 in
- Fort Lauderdale 132 km · 25 °C78 °F · 1,326 mm52 in
- Miami 170 km · 25 °C78 °F · 1,326 mm52 in
- Orlando 171 km · 22 °C72 °F · 1,301 mm51 in
- Lakeland 178 km · 22 °C72 °F · 1,267 mm50 in
- Cape Coral 178 km · 24 °C74 °F · 1,339 mm53 in
- Tampa 220 km · 23 °C73 °F · 1,440 mm57 in
Frequently asked questions
What is the warmest month in Port Saint Lucie?
August is the warmest month in Port Saint Lucie, with an average high of 31 °C (87 °F) and an average low of 25 °C (77 °F).
What is the coldest month in Port Saint Lucie?
January is the coldest month, with an average high of 22 °C (72 °F) and an average low of 12 °C (54 °F).
When does it rain the most in Port Saint Lucie?
August is the wettest month with about 193 mm (7.6 in) of precipitation; February is the driest with about 48 mm (1.9 in).
What is the best time to visit Port Saint Lucie?
Judging by long-term averages, the most comfortable months are November–April.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.