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Contents
- The climate of Port Saint Lucie
- The best time to visit Port Saint Lucie
- The worst time to visit Port Saint Lucie
- Spring weather in Port Saint Lucie
- Summer weather in Port Saint Lucie
- Autumn weather in Port Saint Lucie
- Winter weather in Port Saint Lucie
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
A small wooden gazebo over a natural preserve in Port Saint Lucie, Florida
The climate of Port Saint Lucie
Port Saint Lucie finds its location on the southeastern coast of Florida, USA. The city is characterized by a Cfa climate under the Köppen climate classification, which stands for a humid subtropical climate with no dry season. This categorization signals relatively high temperatures and frequent precipitation throughout the year.
The temperature tends to remain in the warmer range. The lowest average low is 59.5°F (15.3°C) in January, and the highest average high clocks in at 87.6°F (30.9°C) in August. In other words, Port Saint Lucie does not experience major extremes in temperature. The relative humidity ranges from 71% to 78%, indicating a consistently humid climate. On the subject of precipitation, the city sees rainfall throughout the year with the heaviest averages recorded from May to August, peaking at 2.99" (76mm) in August.
A unique characteristic of Port Saint Lucie weather is that its sunshine duration is relatively considerable, despite the high rainfall totals. It ranges from 10.4 hours per day in December to a strong 13.8 hours in June. The UV index is moderate throughout the year, ranging from 5 to 7. The city witnesses winds of 9.4mph (15.1km/h) on average, with gusts that can reach up to 14.5mph (23.3km/h).
The temperature tends to remain in the warmer range. The lowest average low is 59.5°F (15.3°C) in January, and the highest average high clocks in at 87.6°F (30.9°C) in August. In other words, Port Saint Lucie does not experience major extremes in temperature. The relative humidity ranges from 71% to 78%, indicating a consistently humid climate. On the subject of precipitation, the city sees rainfall throughout the year with the heaviest averages recorded from May to August, peaking at 2.99" (76mm) in August.
A unique characteristic of Port Saint Lucie weather is that its sunshine duration is relatively considerable, despite the high rainfall totals. It ranges from 10.4 hours per day in December to a strong 13.8 hours in June. The UV index is moderate throughout the year, ranging from 5 to 7. The city witnesses winds of 9.4mph (15.1km/h) on average, with gusts that can reach up to 14.5mph (23.3km/h).
The best time to visit Port Saint Lucie
The best period to appreciate the weather in Port Saint Lucie stretches from November through April. During this time, the city enjoys a relatively dry climate with less rainfall, averaging from 0.55" (14mm) in January to 1.06" (27mm) in December. The temperatures are also comfortable and moderate, oscillating between a low of 59.5°F (15.3°C) and a high of 80.2°F (26.8°C). The relative humidity registers a small dip during this time, resulting in slightly more pleasant conditions. The UV Index during these months is lower compared to the rest of the year, thereby minimizing the risk of sunburns and other sun-related hazards.
The worst time to visit Port Saint Lucie
A trip to Port Saint Lucie between May and October might result in a more challenging weather experience. This period records both the highest rainfall and temperatures, due to which the heat level feels intensified. Rainfall hovers from 0.98" (25mm) in April, gradually increasing to 2.99" (76mm) in August. Correspondingly, the temperatures reach their annual highs with average lows of 73.2°F (22.9°C) in May and highs soaring up to 87.6°F (30.9°C) in August. The city's humidity also rides upper percentages, reaching up to 78%.
Spring weather in Port Saint Lucie
Spring unfolds from March to May in Port Saint Lucie. This period witnesses a significant increase in temperatures as well as precipitation. While the average temperature leaps from 75.7°F (24.3°C) in March to 82.9°F (28.3°C) in May, the rainfall shows a noticeable level-up from 0.71" (18mm) to 2.2" (56mm). Concurrently, the humidity scales upwards from 71% to 75%. The daylight duration increases gradually reaching from 12 hours per day in March to 13.5 hours in May, providing ample sunlight for outdoor activities.
Summer weather in Port Saint Lucie
Port Saint Lucie’s summer is characterized by high temperatures, hefty rainfall, and high humidity. From June through August, temperatures spin from 86.2°F (30.1°C) to an apex of 87.6°F (30.9°C). Rainfall hits the highest values with 2.28" (58mm) in June escalating to 2.99" (76mm) in August. The long daylight hours, reaching a maximum of 13.8 hours, do not suppress the high humidity level that stays at 78%.
Autumn weather in Port Saint Lucie
Autumn, from September to November, brings a degree of relief from heat and abundant rainfall of the summer months. Temperatures begin to cool down from 85.8°F (29.9°C) in September to 77.2°F (25.1°C) in November. The rainfall decreases from 1.81" (46mm) to 0.83" (21mm) over the same period. The relative humidity drops slightly to 75% in November, offering comparatively comfortable weather conditions.
Winter weather in Port Saint Lucie
Winter in Port Saint’s Lucie, from December to February, is mild and the driest part of the year. The city experiences temperatures fluctuating from a low of 59.5°F (15.3°C) to a high of 73.9°F (23.3°C). Rainfall dips to the yearly low with 0.55" (14mm) in January. Despite the reduced daylight hours, ranging from 10.4 hours in December to 11.3 hours in February, this period is highly favored by visitors for its moderate weather conditions.
Weather in January
January in Port Saint Lucie, Florida, serves as the doorway to the area's warm winter, presenting temperate days and cool nights. A rainfall occurrence of 0.55" (14mm) during this period indicates a relatively dry winter month, while wind speeds of 9.3mph (15km/h) introduce a soothing breeze to the city's weather dynamic. Weather in January »
Weather in February
As residents and visitors transition into February, they should expect slight modifications in Port Saint Lucie's weather characteristics. The temperate winter continues with a moderate increase in day and night temperatures as compared to January. Weather in February »
Weather in March
March in Port Saint Lucie signals the arrival of early Spring, in which temperatures begin to climb slightly higher. Wind gusts can carry a speed of up to 14mph (22.5km/h), stirring a refreshing ambiance mixed with the warmth of the season. Weather in March »
Weather in April
April in Port Saint Lucie embraces the full blossom of spring, with pleasant weather becoming a staple of the city's identity. The city experiences a slight rise in temperature, relative to March, hence introducing a mildly warmer season. Weather in April »
Weather in May
May in Port Saint Lucie heralds the advent of the summer season, distinguished by noteworthy elevations in temperature, daylight length, and humidity levels. The increased temperatures of up to 82.9°F (28.3°C) denote May as one of the warmest months so far. Weather in May »
Weather in June
Port Saint Lucie's weather in June embodies quintessential summer traits, featuring amplified temperatures, extensive daylight, and high humidity. The weather conditions in this month result in optimal conditions for a wide variety of outdoor activities, despite the significantly increased rainfall. Weather in June »
Weather in July
In July, the weather in Port Saint Lucie sustains its peak summer characteristics, elevated temperatures being a prominent feature. The maximum sea temperature scales to a warm 83.9°F (28.8°C), which complements well with the pronounced increase in daily sunshine hours. Weather in July »
Weather in August
The weather in August remains faithful to Port Saint Lucie's summer narrative, exhibiting high temperatures and extended daylight hours. This period observes the peak values for sea and air temperatures, ensuring a welcoming environment for beach-goers and sunbathers. Weather in August »
Weather in September
September in Port Saint Lucie signifies a gentle retreat from the summer heat, visible in the slight decrement in temperature values. The city's climate remains fairly warm, although the nights become cooler, reminiscent of the approaching, milder seasons. Weather in September »
Weather in October
October nudges Port Saint Lucie further into the realm of autumn, showcasing more notable drops in temperature from the summer's peak. The days become marginally cooler while the prominence of sunny days continues to enhance the city's aesthetic appeal. Weather in October »
Weather in November
The last month of the autumn, November, is also a moderately hot month in Port Saint Lucie, Florida, with an average temperature ranging between min 67.8°F (19.9°C) and max 77.2°F (25.1°C). In the transition from October to November, Port Saint Lucie reports an average high-temperature of a still warm 77.2°F (25.1°C), indicating a close resemblance to the prior month. Weather in November »
Weather in December
December in Port Saint Lucie ushers in the winter season with a sizeable drop in temperature and sea temperatures reaching a lower 75.6°F (24.2°C). While the days are cooler, they are also less humid, and cumulatively conditions offer a comfortable climate relative to the hotter months. Weather in December »
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest in Port Saint Lucie?
The coldest month in Port Saint Lucie is January, with an average high-temperature of 71.2°F (21.8°C) and an average low-temperature of 59.5°F (15.3°C).
What is the driest month in Port Saint Lucie?
The month with the least rainfall in Port Saint Lucie, Florida, is January, when the rain falls for 8.2 days and typically collects 0.55" (14mm) of precipitation.
How many days does it rain in Port Saint Lucie?
Throughout the year, in Port Saint Lucie, there are 181.5 rainfall days, and 18.11" (460mm) of precipitation is accumulated.
When is the ocean coldest in Port Saint Lucie?
January and February, with an average ocean temperature of 73.4°F (23°C), are months with the coldest seawater.
What is the month with the least sunshine in Port Saint Lucie?
The months with the least sunshine are January and December, with an average of 6.1h of sunshine.
What is the month with the lowest UV index in Port Saint Lucie?
January, February and December, with an average maximum UV index of 5, are months with the lowest UV index in Port Saint Lucie.
What is the least humid month in Port Saint Lucie?
March is the least humid month, with an average relative humidity of 71%.
When is Daylight Saving Time (DST) in Port Saint Lucie?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Port Saint Lucie, Florida, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
What is the month with the highest UV index in Port Saint Lucie?
The months with the highest UV index are May through September, with an average maximum UV index of 7.
What are the most humid months in Port Saint Lucie?
The months with the highest humidity in Port Saint Lucie, Florida, are June through September, with an average relative humidity of 78%.
When are the longest days in Port Saint Lucie?
The month with the longest days is June, with an average of 13h and 48min of daylight.
What month has the most sunshine in Port Saint Lucie?
With an average of 10.9h of sunshine, July has the most sunshine of the year.
What is the hottest time of year in Port Saint Lucie?
Temperature records in Port Saint Lucie, Florida, mark August as the warmest month, with highs averaging 87.6°F (30.9°C) and lows at 78.4°F (25.8°C).
What is the rainiest month in Port Saint Lucie?
The month with the most rainfall is August, when the rain falls for 23.5 days and typically aggregates up to 2.99" (76mm) of precipitation.
When is the ocean warmest in Port Saint Lucie?
With an average ocean temperature of 85.1°F (29.5°C), August is the month with the warmest seawater.
What is the month with the shortest days in Port Saint Lucie?
December has the shortest days of the year in Port Saint Lucie, with an average of 10h and 30min of daylight.
Average temperature
Port Saint Lucie, FL
The warmest month (with the highest average high temperature) is August (87.6°F).
The month with the lowest average high temperature is January (71.2°F).
The month with the highest average low temperature is August (78.4°F).
The coldest month (with the lowest average low temperature) is January (59.5°F).
Average pressure
Port Saint Lucie, FL
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
30.03"Hg - Average pressure in May:
30.02"Hg - Average pressure in June:
30.01"Hg
- Average pressure in July:
30.03"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
29.97"Hg - Average pressure in November:
30.05"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).
Average wind speed
Port Saint Lucie, FL
- Average wind speed in January:
9.3mph - Average wind speed in February:
8.8mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.2mph - Average wind speed in May:
8.5mph - Average wind speed in June:
6.8mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.6mph - Average wind speed in September:
7.3mph - Average wind speed in October:
8.9mph - Average wind speed in November:
9.1mph - Average wind speed in December:
8.8mph
The windiest month (with the highest average wind speed) is March (9.4mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity
Port Saint Lucie, FL
The months with the highest relative humidity are June, July, August and September (78%).
The month with the lowest relative humidity is March (71%).
Average rainfall
Port Saint Lucie, FL
- Average rainfall in January:
0.55" - Average rainfall in February:
0.67" - Average rainfall in March:
0.71" - Average rainfall in April:
0.98" - Average rainfall in May:
2.2" - Average rainfall in June:
2.28"
- Average rainfall in July:
2.52" - Average rainfall in August:
2.99" - Average rainfall in September:
1.81" - Average rainfall in October:
1.5" - Average rainfall in November:
0.83" - Average rainfall in December:
1.06"
The wettest month (with the highest rainfall) is August (2.99").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days
Port Saint Lucie, FL
- Average rainfall days in January:
8.2 days - Average rainfall days in February:
9.5 days - Average rainfall days in March:
10.4 days - Average rainfall days in April:
12.3 days - Average rainfall days in May:
16.1 days - Average rainfall days in June:
19.7 days
- Average rainfall days in July:
22.5 days - Average rainfall days in August:
23.5 days - Average rainfall days in September:
21.9 days - Average rainfall days in October:
14.8 days - Average rainfall days in November:
11.7 days - Average rainfall days in December:
10.9 days
The month with the highest number of rainy days is August (23.5 days).
The month with the least rainy days is January (8.2 days).
Average sea temperature
Port Saint Lucie, FL
The best month for swimming (with the highest average sea temperature) is August (85.1°F).
The coldest month (with the lowest average sea temperature) is February (73.3°F).
Average daylight / Average sunshine
Port Saint Lucie, FL
- Average daylight in January:
10h and 4min - Average daylight in February:
11h and 1min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 5min - Average daylight in May:
13h and 3min - Average daylight in June:
13h and 5min
- Average daylight in July:
13h and 4min - Average daylight in August:
13h and 1min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 3min - Average daylight in November:
10h and 5min - Average daylight in December:
10h and 3min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in January:
6h and 1min - Average sunshine in February:
8h and 1min - Average sunshine in March:
8h and 2min - Average sunshine in April:
9h and 5min - Average sunshine in May:
10h and 4min - Average sunshine in June:
10h and 5min
- Average sunshine in July:
10h and 5min - Average sunshine in August:
10h and 5min - Average sunshine in September:
9h and 0min - Average sunshine in October:
7h and 0min - Average sunshine in November:
6h and 1min - Average sunshine in December:
6h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 6h and 6min).
Average sunshine days
Port Saint Lucie, FL
- Average sunshine days in January:
18.7 days - Average sunshine days in February:
14.3 days - Average sunshine days in March:
17 days - Average sunshine days in April:
13.1 days - Average sunshine days in May:
11.3 days - Average sunshine days in June:
6.3 days
- Average sunshine days in July:
4.2 days - Average sunshine days in August:
3.8 days - Average sunshine days in September:
5.4 days - Average sunshine days in October:
12.5 days - Average sunshine days in November:
13.9 days - Average sunshine days in December:
16.1 days
The month with the most sunshine days is January (18.7 days).
The month with the least sunshine days is August (3.8 days).
Average UV index
Port Saint Lucie, FL
The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January, February and December (UV index 5).
Average cloud cover
Port Saint Lucie, FL
The months with the most cloud cover are November and December (Cloud cover 34).
The months with the least cloud cover are May, July and August (Cloud cover 27).
Average visibility
Port Saint Lucie, FL
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Port Saint Lucie, Florida, USA
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