Last updated: February 24, 2025
September in Marco Island, United States, offers a warm embrace with maximum temperatures reaching 34°C (94°F) and an average temperature of 28°C (82°F). As summer transitions to fall, the island experiences a minimum temperature of 23°C (75°F), providing a comfortable atmosphere for visitors. However, the month is characterized by significant rainfall, accumulating to 171 mm (6.7 in) over approximately 20 days, contributing to the region's lush landscapes. With a humidity level averaging 76%, the tropical climate can feel quite sultry, inviting beachgoers and nature lovers to enjoy both sunny spells and refreshing showers alike.
In September, Marco Island experiences a delightful blend of warmth and humidity, with temperatures that continue to rise as summer begins to transition into fall. The minimum temperature hovers around 23°C (75°F), while the average settles at a comfortable 28°C (82°F), and highs can reach a balmy 34°C (94°F). This month marks a peak in heat compared to the preceding months, reflecting a gradual increase in temperatures from June's warm averages to September's sweltering highs. The lingering heat of summer still dominates, making it an ideal time for beach lovers and outdoor enthusiasts to enjoy the sun-soaked shores before the cooler days of October arrive.
In September, Marco Island experiences significant rainfall, with 171 mm (6.7 inches) of precipitation falling over 20 days, marking it as one of the wetter months of the year. This is part of a trend observed throughout the summer, where June, July, and August also showcase high accumulation and frequent rainy days. With precipitation peaking during the summer months, September is a continuation of this wet season, though slightly less intense than the months preceding it. As the region transitions into fall, the rainfall begins to taper off, leading into the drier months of October and November. This shift highlights a notable seasonal pattern where summer humidity and storms give way to a more moderate climate, creating a dynamic interplay between wet and dry periods for the island’s residents and visitors.
In September, Marco Island experiences a humidity level of 76%, marking a slight increase from the summer months of June and July, which see the lowest humidity at 69% and 70%, respectively. As summer fades, the humidity begins to rise once again, reflecting a trend where humidity levels consistently increase during the latter part of the year. This rise continues into the fall, peaking at 81% by January. Overall, the data underscores a seasonal pattern where humidity is generally higher during the colder months, creating a more comfortable atmosphere as residents and visitors transition from the warm summer heat to the milder autumn climate.
As summer transitions into fall, Marco Island experiences a slight dip in UV Index levels, yet September still boasts an impressive UV Index of 11, categorizing it within the extreme exposure range. With a recommended burn time of just 10 minutes, sun enthusiasts must remain vigilant to protect their skin during this month. Following a summer of consistently high levels at 12, September marks a subtle shift while still retaining a formidable intensity. As we move towards October, the UV Index will further decrease, offering a brief respite before the sun's potency begins to wane. Whether you're soaking up the sun or enjoying water activities, understanding these UV trends is crucial for safe outdoor enjoyment. For a detailed breakdown of UV levels throughout the year, check out the comprehensive guide here: Marco Island UV Index.
UV Risk Categories
September marks a delightful transition in Marco Island, where sunshine graces the skies with an impressive 313 hours of golden rays. Following the peak summer months of July and August, which boasted 336 and 329 hours respectively, September maintains a strong presence of sunlight, seamlessly blending the lingering warmth of summer with the anticipation of fall. While the hours gradually decline into October's 303 hours, this month stands out for its comfortable temperatures and breathtaking sunsets, making it a perfect time for outdoor activities and leisurely strolls. As the year progresses, each month's sunlight reveals a compelling rhythm, harmonizing the vibrant energy of summer with the gentle embrace of autumn.
In September, Marco Island experiences a 33% chance of sunny weather, positioning it on the lower end of the spectrum compared to other months. While the summer months of June, July, and August bring even less sunshine, September marks a slight improvement. This month follows a series of sun-drenched spring days peaking at 64% in April and 61% in March, suggesting a transition into the fall season. As autumn progresses, the likelihood of sun gradually increases again, reaching 46% by October. Thus, while September may not be the sunniest month, it stands as a bridge from the hot summer to a more pleasant fall, promising occasional bright days for visitors and residents alike.
In September, Marco Island experiences a delightful 12 hours of daylight, marking a transition after the sun-kissed summer months. The trend shows a gradual increase in daylight from 10 hours in January, peaking at 13 hours during the summer months of May through August. As the days begin to shorten, September maintains a comfortable balance, offering ample sunlight for outdoor activities while heralding the impending arrival of autumn. This steady daylight pattern reflects the island's inviting climate, making it an ideal escape for those seeking sun-drenched days and warm evenings.
As September rolls in, Marco Island experiences a notable dip in wind speeds, averaging just 2.5 m/s (6 mph). This decline marks the calmest month of the year, contrasting sharply with the breezier conditions of earlier months. Following the lighter winds of summer, which hovered around 3.1 to 3.3 m/s, September's gentle breezes invite a tranquil atmosphere, ideal for those seeking a peaceful retreat. Anticipating the return of stronger gusts in October, with speeds increasing to 3.7 m/s (8 mph), September serves as a serene lull before the winds pick up again, illustrating the captivating seasonal rhythm of Marco Island's climate.
The weather in Marco Island 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 Marco Island and find detailed weather information for every month.
September and January present stark contrasts in weather conditions. In September, the temperatures range from a minimum of 23°C (75°F) to a maximum of 34°C (94°F), accompanied by significant rainfall of 171 mm (6.7 in) over about 20 days, resulting in high humidity levels of 76%. In contrast, January experiences much cooler temperatures, with a minimum of 5°C (42°F) and a maximum of 27°C (81°F). Rain is minimal during this month, with only 29 mm (1.2 in) falling over just 4 days, and humidity slightly higher at 81%. For more detailed insights into January weather, check Marco Island weather in January.
September and February present contrasting weather conditions. September experiences much warmer temperatures, with averages reaching around 28°C (82°F) and highs of 34°C (94°F). In contrast, February offers cooler temperatures, averaging 21°C (70°F) and peaking at 28°C (83°F). Additionally, September is significantly wetter, with 171 mm (6.7 in) of precipitation spread over 20 days, compared to February's mild 33 mm (1.3 in) over just 3 days. Humidity is fairly similar in both months, with September at 76% and February slightly higher at 79%. For more details on February's climate, you can visit Marco Island weather in February.
When comparing the weather in September and March, notable differences emerge. September boasts warmer temperatures, with a minimum of 23°C (75°F) and an average of 28°C (82°F), peaking at a high of 34°C (94°F). In contrast, March experiences much cooler conditions, starting at a minimum of 10°C (50°F) and averaging 22°C (72°F), with a maximum of 29°C (84°F). Additionally, September is characterized by significantly higher precipitation, totaling 171 mm (6.7 inches) over 20 days, while March sees a mere 23 mm (0.9 inches) over just 2 days. The humidity remains consistent in both months at 76%, but overall, March feels considerably drier and more temperate compared to the sultry September weather. For a closer look at March conditions, visit Marco Island weather in March.
When comparing the weather in September to that in April, notable differences arise in temperature and precipitation levels. September tends to be warmer, with average temperatures reaching around 28°C (82°F) and a maximum of up to 34°C (94°F), while April is milder, averaging 24°C (76°F) with a maximum of 31°C (88°F). Additionally, September experiences significantly higher precipitation, totaling 171 mm (6.7 in) over about 20 days, compared to April's relatively dry conditions with only 42 mm (1.7 in) of rain over 7 days. Humidity levels are similar, with September at 76% and April at 73%. For more details, visit Marco Island weather in April.
When comparing the weather in September and May, it’s clear that September tends to be warmer and more humid. In September, temperatures range from a minimum of 23°C (75°F) to a maximum of 34°C (94°F), with an average of 28°C (82°F). In contrast, May sees slightly cooler temperatures, with a minimum of 19°C (67°F) and a maximum of 32°C (90°F), averaging 26°C (79°F). Additionally, September experiences more rainfall, averaging 171 mm (6.7 in) over 20 days, whereas May has less precipitation at 126 mm (5.0 in) over just 12 days. The humidity levels also reflect this trend, with September at 76% compared to May's 71%. For a detailed overview, check out Marco Island weather in May.
In comparing the weather patterns of September and June, we see that both months boast similar temperature ranges, with a minimum of 23°C (75°F) and an average of 28°C (82°F). However, September tends to have slightly higher maximum temperatures, reaching up to 34°C (94°F) compared to June's peak of 33°C (92°F). Both months experience considerable rainfall, but September has a bit less, with 171 mm (6.7 in) of precipitation over 20 days, while June sees 181 mm (7.1 in) over 21 days. Notably, humidity is higher in September at 76%, as opposed to June's 69%. For a detailed look at June weather, you can check out Marco Island weather in June.
In comparing the weather of September to July, we see some notable differences. September typically features a slightly lower minimum temperature of 23°C (75°F), while July starts off a bit warmer at 24°C (75°F). Both months share a similar average temperature of around 28°C (82°F), but July experiences a cooler maximum temperature of 32°C (90°F) compared to September's peak at 34°C (94°F). Precipitation levels are higher in July, with 188 mm (7.4 in) over 24 days, compared to September's 171 mm (6.7 in) falling over 20 days. Interestingly, September also has a higher humidity level of 76%, while July sits at a slightly lower 70%. For more detailed insights on July weather, visit Marco Island weather in July.
In comparing the weather of September to August, we observe a slight drop in minimum temperatures, with September recording a minimum of 23°C (75°F) compared to August's 24°C (76°F). However, the average temperature remains similar for both months, hovering around 28°C (82°F) to 28°C (83°F). Notably, September experiences slightly higher maximum temperatures, reaching 34°C (94°F) versus August's peak of 33°C (92°F). Precipitation is also notable, with September receiving 171 mm (6.7 in) over 20 days, while August had a bit more precipitation at 183 mm (7.2 in) across 25 days. Humidity levels are a little higher in September at 76% compared to August's 72%. For more detailed insights, you can explore Marco Island weather in August.
September and October weather exhibit distinct differences, with September generally being warmer and wetter. In September, temperatures range from a minimum of 23°C (75°F) to a maximum of 34°C (94°F), accompanied by significant rainfall of 171 mm (6.7 in) over 20 days, and humidity levels averaging 76%. In contrast, October sees a cooler climate with minimum temperatures dropping to 15°C (59°F) and maximums reaching 32°C (91°F). Rainfall also decreases to 94 mm (3.7 in) over just 13 days, and humidity rises slightly to 79%. For a more detailed look at October weather in Marco Island, visit Marco Island weather in October.
September experiences warmer temperatures, with a minimum of 23°C (75°F) and an average high of 34°C (94°F), making it a hot and humid month with a high precipitation level of 171 mm (6.7 in) over 20 days. In contrast, November sees a notable drop in temperatures, featuring a minimum of 11°C (52°F) and an average high of 32°C (90°F). While November remains humid at 80%, it boasts significantly less rainfall, with only 53 mm (2.1 in) across just 6 days. For more details on the weather specifics in November, you can check Marco Island weather in November.
In September, the weather is characterized by warm temperatures, with averages reaching around 28°C (82°F) and maximums soaring up to 34°C (94°F). It is also quite humid, with a notable 76% humidity and significant rainfall, averaging 171 mm (6.7 in) over 20 days. In contrast, December brings much cooler temperatures, with lows dropping to 9°C (48°F) and a comfortable average of 21°C (70°F). Precipitation is significantly reduced in December, totaling only 35 mm (1.4 in) across 5 days, and humidity slightly increases to 81%. For more details on December weather in Marco Island, visit Marco Island weather in December.
As September rolls in, Marco Island experiences a notable transition in weather, marked by warm temperatures averaging around 28°C (82°F) and a peak of 34°C (94°F). Although the days retain a summer feel, they are often accompanied by increased humidity and significant rainfall, totaling approximately 171 mm over about 20 days. This shift in climate makes September distinct from the drier, cooler months that follow, presenting a lush, vibrant atmosphere ideal for those who enjoy the lush tropical environment. For more detailed insights into how September compares to the rest of the year, check out Marco Island Climate.