Last updated: February 24, 2025
Saint Lucie's September weather showcases a warm tropical climate, with maximum temperatures reaching up to 33°C (91°F) and an average of 28°C (82°F). The minimum temperature rarely drops below 24°C (75°F), providing a consistently warm atmosphere. This month also sees significant precipitation, totaling 168 mm (6.6 in), spread over 23 days, resulting in a humid environment with an average humidity level of 83%. While the frequent rain may surprise visitors, it contributes to the lush landscape and vibrant atmosphere of this beautiful coastal region.
As September unfolds in Saint Lucie, United States, temperatures begin to reflect the peak of summer warmth, characterized by a minimum of 24°C (75°F) and climbing to maximums around 33°C (91°F). The average temperature holds steady at 28°C (82°F), making it a perfect time for outdoor activities while still enjoying the beach vibe. Notably, this month transitions smoothly from the high heat of August, with only a slight dip in nighttime lows. As summer lingers, the humidity can be palpable, but the warmth remains inviting, creating an appealing atmosphere for both locals and visitors alike.
In September, Saint Lucie experiences significant rainfall, with precipitation totaling 168 mm (6.6 in) over approximately 23 days. This marks a slight decrease from the preceding month of August, which saw the highest rainfall of the year at 194 mm (7.6 in), resulting in a trend of heavy summer rains. The precipitation in September continues to showcase the area's seasonal patterns, as it transitions from the peak of the wet season to the more moderate fall months ahead. Notably, September's precipitation is relatively consistent with the preceding months, maintaining the island's lush landscape, while also hinting at a gradual tapering off as the dryer months approach.
In Saint Lucie, the humidity in September reflects a notable trend that continues throughout the year. At 83%, September’s humidity is consistent with the surrounding months, notably matching October and November. This increase from the more arid conditions of late spring, where humidity dips to 65% in May, indicates a return to the increased moisture typical of late summer and early fall. Interestingly, the levels remain elevated from June through to December, suggesting that residents can expect a humid climate as the year transitions into winter. Overall, September serves as a reminder of the tropical climate that characterizes this region, where humidity prevails, especially as summer gives way to autumn.
In September, Saint Lucie experiences a UV Index of 11, maintaining its status within the extreme exposure category. This reflects a slight decline from the peak summer months, yet the potential for harm remains significant, with a burn time as quick as 10 minutes. The trend throughout the year shows a gradual escalation from a moderately high January to the extreme levels consistently reached during the summer months, highlighting the importance of protective measures as the days begin to shorten. As the UV Index begins to decrease in October, residents and visitors alike should remain vigilant during September, ensuring proper sun protection strategies are in place. For more detailed information, explore Saint Lucie UV Index.
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September in Saint Lucie shines with an impressive 311 hours of sunshine, continuing the trend of vibrant summer months. This is a small dip from the peak summer sun experienced in July and August, which recorded 335 and 331 hours respectively. As the seasons shift, September maintains a considerable amount of daylight, providing plenty of opportunities for outdoor activities and enjoying the beautiful coastal scenery. Following a strong summer, the sunlight begins to wane slightly, but the warmth of early fall still envelops the area, making it a delightful time for both residents and visitors alike. As the year progresses into the cooler months, one can still bask in the golden glow of September, a perfect blend of summer's glorious rays and the gentle approach of autumn.
In September, residents and visitors in Saint Lucie, United States, can expect a 35% chance of sunny weather. This marks a noticeable dip in sunshine compared to the summer months, where the chances plummet to as low as 19% in June and 20% in August. With the arrival of fall, the likelihood of sunnier days begins to rebound in October at 47%, suggesting a gradual shift towards more favorable weather conditions. Overall, while September offers fewer sunny days than the months leading up to it, it is a transitional period that lays the groundwork for clearer skies as the season changes.
As September rolls into Saint Lucie, the days begin to shorten, providing approximately 12 hours of daylight. This marks a subtle decline from the peak summer months of June to August, during which the sun graced the city with 13 hours of light each day. The transition from the vibrant warmth of summer to the cooler autumn months is evident, as daylight steadily dwindles in October and November, eventually returning to the 10-hour mark seen at the year's beginning. This rhythmic ebb and flow of daylight not only highlights the changing seasons but also enriches the unique charm of Saint Lucie throughout the year.
As September arrives in Saint Lucie, the gentle embrace of the wind shifts noticeably, with average wind speeds dropping to 3.0 m/s (7 mph), the lowest of the year. This decline follows a summer characterized by slightly breezier conditions, peaking at 5.0 m/s (11 mph) in May before retreating to calmer days. In the wider context of the year, September marks a transition; from a peak in the spring and early summer months to more tranquil flows that begin to set in as fall approaches. Following this lull, residents can look forward to a gradual uptick in wind speed during October, hinting at the dynamic shifts that characterize Saint Lucie's climate across the seasons.
The weather in Saint Lucie changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Saint Lucie and find detailed weather information for every month.
September and January present markedly different weather patterns. September typically enjoys higher temperatures, with a minimum of 24°C (75°F) and an average of 28°C (82°F), peaking at 33°C (91°F). However, it also comes with significant rainfall, recording around 168 mm (6.6 in) over 23 days, accompanied by a high humidity level of 83%. In contrast, January experiences much cooler temperatures, with lows dropping to 4°C (40°F) and average highs of 20°C (68°F), reaching a maximum of 29°C (85°F). The precipitation in January is significantly lower at 38 mm (1.5 in) over just 6 days, yet humidity remains constant at 83%. For more details, check out Saint Lucie weather in January.
When comparing the weather in September and February, it's clear that September is much warmer and more humid. September boasts average temperatures of 28°C (82°F) with highs reaching 33°C (91°F) and minimal lows of 24°C (75°F). In contrast, February offers a cooler climate, with averages around 22°C (71°F) and maximums of 28°C (83°F), but with significantly lower lows of 8°C (46°F). Additionally, September sees much more precipitation, with 168 mm (6.6 in) over approximately 23 days, compared to February's 48 mm (1.9 in) over just 9 days. Overall, February's weather is milder and drier, making it quite distinct from the warm and wet conditions of September. For more details on February weather, you can visit Saint Lucie weather in February.
September and March present contrasting weather patterns. In September, temperatures are notably warmer, with an average of 28°C (82°F) and highs reaching up to 33°C (91°F), while humidity levels are also high at 83%. This month experiences significant rainfall, with 168 mm (6.6 in) over 23 days. In comparison, March offers a much cooler climate, with average temperatures of 22°C (72°F) and a maximum of 31°C (88°F). Precipitation is minimal in March, totaling just 31 mm (1.2 in) over 5 days, and humidity drops to 75%. For more detailed insights into March weather, you can check Saint Lucie weather in March.
When comparing the weather in September and April, distinct differences become evident. September experiences warmer temperatures with an average of 28°C (82°F), peaking at 33°C (91°F), while April's averages are cooler, with a max of 32°C (90°F) and an average of 24°C (75°F). Additionally, September is marked by higher humidity at 83% and significantly more rainfall—168 mm (6.6 in) over 23 days—as compared to April's 69 mm (2.7 in) over just 9 days, resulting in a much drier climate during the latter month. For more specific details about the weather in April, you can check Saint Lucie weather in April.
In comparing the weather of September and May, September tends to be warmer and rainier. The average temperature in September is 28°C (82°F), with highs reaching up to 33°C (91°F), while May's average is slightly cooler at 26°C (78°F) and peaks at 32°C (90°F). Humidity levels are notably higher in September at 83%, compared to a more comfortable 65% in May. Additionally, September sees significantly more precipitation, with 168 mm (6.6 in) over 23 days, whereas May experiences 125 mm (4.9 in) over just 15 days. For more specific details, you can check Saint Lucie weather in May.
In comparing the weather in September and June, we note that September tends to be slightly warmer, with average temperatures reaching 28°C (82°F) compared to June's average of 27°C (81°F). Both months experience similar minimum temperatures, but September has a higher maximum temperature of 33°C (91°F) versus June’s 32°C (90°F). Regarding precipitation, September sees 168 mm (6.6 in) over 23 days, slightly less than June's 173 mm (6.8 in) over the same number of days. Notably, humidity levels are higher in September at 83%, compared to June's 73%, making September feel more muggy. For a detailed look at June’s climate, you can visit Saint Lucie weather in June.
When comparing the weather in September and July, both months show similar temperature ranges, with minimums around 24°C (75°F), average temperatures of 28°C (82°F), and maximums peaking at 33°C (91°F for September and 92°F for July). However, September tends to be slightly wetter, with 168 mm (6.6 in) of precipitation over 23 days compared to July's 175 mm (6.9 in) over 27 days. Additionally, the humidity is higher in September, averaging 83% compared to July's 77%. For a more detailed look at July weather, check out Saint Lucie weather in July.
In comparison to August, September experiences slightly warmer minimum temperatures, with a low of 24°C (75°F) compared to August's 25°C (76°F). Both months have a similar average temperature of 28°C (82°F) and slightly higher maximum temperatures in September, reaching 33°C (91°F) versus August's maximum of 32°C (90°F). However, September sees increased precipitation, totaling 168 mm (6.6 in) over 23 days, whereas August records 194 mm (7.6 in) over 27 days. Additionally, September has a higher humidity level at 83%, compared to August's 80%. For a more detailed look at the weather trends, check out Saint Lucie weather in August.
September and October exhibit notable differences in weather patterns. In September, the temperatures are warmer, with a minimum of 24°C (75°F) and average highs reaching 33°C (91°F). The month experiences higher precipitation, totaling 168 mm (6.6 in) over 23 days, while humidity remains quite high at 83%. In contrast, October brings cooler temperatures, with a minimum dropping to 13°C (55°F) and an average high of 31°C (88°F). Precipitation decreases to 133 mm (5.2 in) over 18 days, yet humidity remains consistent at 83%. Overall, while October is cooler and drier than September, the persistent humidity ties the two months together. For more detailed information, visit Saint Lucie weather in October.
In September, the weather is significantly warmer, with average temperatures ranging from a minimum of 24°C (75°F) to a maximum of 33°C (91°F). This month also brings considerable rainfall, accumulating 168 mm (6.6 in) over 23 days, contributing to a high humidity level of 83%. In contrast, November sees much cooler conditions, with temperatures dipping to a minimum of 9°C (49°F) and an average maximum of 29°C (85°F). Rainfall decreases to 83 mm (3.3 in) spread over just 13 days, while humidity remains constant at 83%. For more details on the climate during this month, you can refer to Saint Lucie weather in November.
The weather in September and December presents a stark contrast. September boasts warmer temperatures, with a minimum of 24°C (75°F) and an average of 28°C (82°F), peaking at a sizzling 33°C (91°F). However, it also experiences significant rainfall, accumulating 168 mm (6.6 in) over 23 days, alongside high humidity at 83%. In contrast, December brings much cooler temperatures, with a minimum of 8°C (47°F) and an average of 21°C (70°F), reaching a maximum of 29°C (85°F). Additionally, December is far drier, with only 54 mm (2.1 in) of precipitation over just 10 days and a humidity level that remains high at 84%. For a more detailed view of December weather, check out Saint Lucie weather in December.
As September unfolds in Saint Lucie, the weather captures a unique blend of warmth and humidity that distinguishes it from other months. With average temperatures hovering around a sultry 28°C (82°F), the month invites a mix of sun-soaked days and frequent rain, leading to an average of 23 precipitation days. The lush, tropical feel is heightened by humidity levels peaking at 83%, creating a palpable atmosphere. This month’s 168 mm (6.6 in) of rainfall sets September apart, transforming the landscape into a vibrant green that characterizes this transition period as summer gradually gives way to fall. For a more in-depth look at the seasonal changes and overall climate, visit Saint Lucie Climate.