Port Saint Lucie climate

Name: Port Saint Lucie
Address: US

Port Saint Lucie is warmest in July, with average highs of 31 °C, and coldest in January, when nights average 15 °C. September is the wettest month (147 mm) and December the driest (44 mm). Figures are 1991–2020 climate normals.

Across a full year Port Saint Lucie averages 1,007 mm of rain, 268 days above 25 °C and 0 days below freezing.

United States · 5 m elevation · population 164,603 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month July 31 °C
Coldest month January 15 °C
Driest month December 44 mm
Wettest month September 147 mm
Least cloud May 45 % cloud
Hottest on record April 37 °C
Coldest on record January -0.1 °C
Warmest sea August 29 °C

What to expectPort Saint Lucie through the year

Port Saint Lucie has a clear annual cycle: average daily highs run from 22 °C in January to 31 °C in July, a swing of 9.1 °C in mean temperature across the year.

Counted across a normal year, 268 days a year reach 25 °C, 95 of them reach 30 °C, 0 nights drop below freezing. The warmest reading in the 1991–2020 record is 37 °C, in April.

Rain is strongly seasonal. September averages 147 mm against 44 mm in December — 3.3 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Port Saint Lucie is warmest in August at 29 °C and coldest in February at 23 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	22.4 °C	52 mm	54 %
February	23.8 °C	48 mm	48 %
March	25.2 °C	59 mm	47 %
April	27.3 °C	60 mm	46 %
May	29.2 °C	77 mm	45 %
June	30.3 °C	131 mm	62 %
July	31.0 °C	99 mm	61 %
August	30.9 °C	127 mm	63 %
September	29.6 °C	147 mm	65 %
October	27.7 °C	106 mm	54 %
November	25.2 °C	57 mm	52 %
December	23.4 °C	44 mm	53 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	22.4 °C	15.0 °C	18.3 °C	30.2 °C	-0.1 °C	7	0
February	23.8 °C	15.9 °C	19.3 °C	31.2 °C	2.4 °C	11	0
March	25.2 °C	17.2 °C	20.8 °C	34.1 °C	5.4 °C	17	2
April	27.3 °C	19.4 °C	23.0 °C	36.7 °C	10.8 °C	24	4
May	29.2 °C	21.7 °C	25.2 °C	35.9 °C	13.4 °C	30	11
June	30.3 °C	23.9 °C	26.7 °C	36.2 °C	19.1 °C	30	16
July	31.0 °C	24.6 °C	27.4 °C	36.0 °C	21.9 °C	31	24
August	30.9 °C	24.8 °C	27.4 °C	34.7 °C	21.2 °C	31	23
September	29.6 °C	24.3 °C	26.5 °C	33.9 °C	20.3 °C	30	11
October	27.7 °C	22.3 °C	24.7 °C	33.0 °C	9.5 °C	29	3
November	25.2 °C	19.2 °C	21.8 °C	32.0 °C	6.2 °C	17	0
December	23.4 °C	16.8 °C	19.7 °C	29.6 °C	0.3 °C	11	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	52 mm	7	11 h/day	54 %	72 %	23 km/h	23.4 °C
February	48 mm	7	11 h/day	48 %	72 %	22 km/h	23.2 °C
March	59 mm	7	12 h/day	47 %	69 %	23 km/h	23.5 °C
April	60 mm	8	13 h/day	46 %	69 %	22 km/h	24.6 °C
May	77 mm	10	13 h/day	45 %	71 %	21 km/h	26.0 °C
June	131 mm	18	14 h/day	62 %	80 %	18 km/h	27.5 °C
July	99 mm	18	14 h/day	61 %	80 %	17 km/h	28.3 °C
August	127 mm	21	13 h/day	63 %	82 %	17 km/h	28.8 °C
September	147 mm	19	12 h/day	65 %	82 %	19 km/h	28.7 °C
October	106 mm	13	12 h/day	54 %	77 %	21 km/h	27.8 °C
November	57 mm	9	11 h/day	52 %	74 %	23 km/h	26.1 °C
December	44 mm	7	10 h/day	53 %	75 %	22 km/h	24.8 °C

Where Port Saint Lucie ranks

Ranking	Position	Value
Best beach destinations in the world in April	43rdof 50	90/100
Places with the best weather in North America in January	49thof 50	90/100

Planning a trip? See the best time to visit Port Saint Lucie.

QuestionsCommon questions about Port Saint Lucie’s climate

When is the best time to visit Port Saint Lucie?

That depends on what you want, so the honest answer is a comparison rather than a single month. February, March, December sit closest to 20 °C on average, July is the warmest month and December the driest. The month-by-month table above has the full picture.

How hot does Port Saint Lucie get?

In July, the warmest month, daily highs average 31 °C. About 95 days a year pass 30 °C. The highest value in the 1991–2020 record is 37 °C.

How cold does it get in winter?

Nights average 15 °C in January, the coldest month. A normal year has 0 nights below freezing.

Which month is wettest in Port Saint Lucie?

September, averaging 147 mm over 19 days with rain. The driest month is December with 44 mm. The year as a whole averages 1,007 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Port Saint Lucie rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.