Last updated: February 24, 2025
In September, Fort Myers experiences a warm tropical climate characterized by maximum temperatures reaching 34°C (94°F) and an average of 28°C (82°F), offering ideal conditions for outdoor activities. The weather, however, is marked by humidity levels at 83%, creating a muggy atmosphere. Rainfall is significant during this month, with a total precipitation of 188 mm (7.4 in) spread across 21 days, adding to the lushness of the region. Visitors should be prepared for occasional showers while enjoying the vibrant and lively environment that Fort Myers has to offer.
As summer transitions into autumn, September in Fort Myers offers a delightful blend of warmth and humidity. With minimum temperatures averaging around 21°C (71°F) and maximums peaking at 34°C (94°F), residents and visitors can still savor the outdoors while enjoying average daily temperatures of 28°C (82°F). This month marks a slight drop from the sweltering highs of the preceding months, yet it retains a tropical essence, perfect for beach outings and evening strolls. While the heat lingers, the early hint of fall is palpable, making September an ideal time to experience Fort Myers' vibrant scenery against a backdrop of warming skies.
In September, Fort Myers experiences a significant shift in its precipitation patterns, with a notable 188 mm (7.4 in) of rain falling over 21 days. This month marks a decline from the intense summer rainfall seen in both July and August, yet it still remains substantial compared to the drier months earlier in the year. As the region transitions deeper into the rainy season, September's precipitation reflects the tail end of summer storms, heralding the approach of autumn. Despite the volume of rain, the frequency of rainy days decreases, allowing for occasional breaks of sunshine amid the showers, providing a balance that sustains the lush landscapes of Southwest Florida.
In September, Fort Myers experiences a return to higher humidity levels, reaching 83%, mirroring the sticky conditions of January and October. This month's humidity reflects a notable trend, as it climbs from a lower 65% in May to a peak reminiscent of the earlier months of the year. The summer's influence lingers with the humidity levels peaking again in August at 80%, but September's consistent moisture sets the stage for a gradual shift towards the cooler, yet still humid, months of autumn. Interestingly, humidity remains rather stable throughout the fall, with 83% persisting into November, revealing Fort Myers' characteristic tropical feel.
As September rolls into Fort Myers, the UV Index remains notably high at 11, categorizing it as extreme and suggesting a burn time of just 10 minutes for unprotected skin. This trend of intense UV exposure peaks during the summer months, with July and August also feeling the heat at a consistent 12, before gradually tapering off in October to a very high 10. Overall, September continues the pattern of challenging sun conditions prevalent throughout the summer, so it's essential to stay vigilant with sun protection. To learn more about managing your sun exposure, check out the detailed guide here: Fort Myers UV Index.
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As September rolls into Fort Myers, the sun continues to shine brightly, delivering an impressive 308 hours of sunshine. This marks a slight dip from the peak summer months of July and August, each basking in over 320 hours of golden rays. However, September's warmth still outshines the earlier months of the year, showcasing the region's consistent weather pattern. Following a trend observed from spring into fall, sunshine hours remain robust, creating a perfect backdrop for outdoor activities. As the calendar turns to October, residents can look forward to an average of 301 hours, ensuring that the charm of sunny days lingers in this picturesque coastal town.
In Fort Myers, September offers a 34% chance of sunny weather, indicating a noticeable dip in sunshine as summer wanes. This lower likelihood follows the dismal summer months, with June, July, and August all experiencing very few sunny days, each hovering around 18%. Contrastingly, earlier months such as April and May showcase a more optimistic forecast, peaking at 62% and 53% respectively. As autumn approaches, the likelihood of sunny weather begins to recover in October, climbing back up to 48%, suggesting a return to brighter days as the heat of summer recedes. This trend highlights a seasonal shift, where vibrant sunshine becomes more fleeting in the late summer but gradually reemerges with the arrival of fall.
As summer gradually gives way to autumn, September in Fort Myers, United States, offers 12 hours of daylight—a gentle decline from the peak of summer when daylight reaches its maximum at 13 hours. This transition reflects a broader trend of diminishing daylight that begins in May and continues into the fall months. While September boasts ample sunlight for outdoor activities and enjoying the vibrant surroundings, residents can anticipate the cooler, shorter days ahead as October ushers in an 11-hour daylight span. The subtle changes in daylight duration not only signal the changing seasons but also invite opportunities for embracing the unique experiences each month brings.
As September rolls into Fort Myers, the winds begin to whisper a gentle lull, with average speeds declining to 2.1 m/s (5 mph). This shift marks the continuation of a noticeable downward trend in wind speeds from the summer months, as July and August already saw lighter breezes at 2.4 m/s (5 mph) and 2.5 m/s (6 mph), respectively. The transition from the breezy days of spring, where average speeds hovered around 3.4 m/s (8 mph) to 3.7 m/s (8 mph), reflects the region's seasonal rhythm. With these softening winds, September invites a warmer, more tranquil atmosphere, contrasting sharply with the gustier months earlier in the year. As fall approaches, residents and visitors alike can expect a peaceful yet refreshing air, perfect for outdoor activities and enjoying the beautiful surroundings.
The weather in Fort Myers 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 Fort Myers and find detailed weather information for every month.
September and January present striking contrasts in weather. In September, temperatures range from a minimum of 21°C (71°F) to a scorching maximum of 34°C (94°F), with an average of 28°C (82°F). The month is characterized by significant rainfall, receiving 188 mm (7.4 in) over 21 days, alongside high humidity levels at 83%. In contrast, January experiences much cooler temperatures, with a minimum of 2°C (36°F) and a maximum of 29°C (85°F), averaging 18°C (65°F). Precipitation drops significantly to just 36 mm (1.4 in) over only 3 days, maintaining the same humidity level of 83%. For more details on January weather, visit Fort Myers weather in January.
September and February present strikingly different weather profiles. In September, temperatures range from a mild 21°C (71°F) at night to a sweltering maximum of 34°C (94°F) during the day, accompanied by high humidity levels at 83%. This month is also notable for its significant rainfall, with an average of 188 mm (7.4 inches) spread over 21 days, making it quite wet. In contrast, February features a much cooler climate, with nighttime lows dropping to a brisk 2°C (36°F) and daytime averages around 21°C (70°F), peaking at 31°C (88°F). Precipitation is significantly reduced, with only 39 mm (1.5 inches) falling over just 5 days, and humidity slightly lower at 80%. For more detailed insights on February weather, visit Fort Myers weather in February.
In comparing the weather of September and March, September experiences significantly warmer temperatures, with averages around 28°C (82°F) and maximums reaching 34°C (94°F). This month also sees high humidity levels at 83% and substantial precipitation, averaging 188 mm (7.4 in) over 21 days. In contrast, March presents a much cooler climate, with temperatures ranging from a minimum of 7°C (44°F) to an average of 22°C (72°F) and maximums of 32°C (90°F). This month is notably drier, receiving only 23 mm (0.9 in) of rain over just 2 days, and features a slightly lower humidity level at 75%. For a more detailed look at March weather, you can visit Fort Myers weather in March.
When comparing the weather in September and April, notable contrasts emerge. September boasts higher average temperatures, with a minimum of 21°C (71°F) and an average of 28°C (82°F), peaking at a warm 34°C (94°F). In contrast, April starts cooler, with a minimum of 11°C (52°F) and an average temperature of 25°C (77°F), while also reaching similar highs of 34°C (93°F). Additionally, September experiences significantly more precipitation, totaling 188 mm (7.4 in) across 21 days, whereas April is drier with only 48 mm (1.9 in) over 8 days. Furthermore, humidity levels are higher in September at 83%, compared to 68% in April. For more information on April weather, visit Fort Myers weather in April.
When comparing the weather in September and May, notable differences arise in both temperature and precipitation. September typically experiences warmer temperatures, with a minimum of 21°C (71°F) and an average around 28°C (82°F), whereas May has slightly cooler temperatures, ranging from a minimum of 15°C (60°F) and an average of 26°C (80°F). Despite having similar maximum temperatures of 34°C (94°F), September receives significantly more rainfall, averaging 188 mm (7.4 in) over 21 days, compared to May's 145 mm (5.7 in) across only 13 days. Additionally, September's humidity level is higher at 83%, compared to the more comfortable 65% in May, making May generally more pleasant overall. For more details, check out Fort Myers weather in May.
In comparing the weather of September and June, we observe some notable differences. September features a slightly higher average temperature of 28°C (82°F) but a min temperature of 21°C (71°F), while June starts off a touch warmer with a minimum temperature of 22°C (72°F) and an average of 27°C (82°F). June also sees a maximum temperature that can reach as high as 35°C (96°F), compared to September's peak of 34°C (94°F). Precipitation levels are higher in June, with 221 mm (8.7 in) over 24 days, compared to September's 188 mm (7.4 in) over 21 days. Additionally, June has a lower humidity level of 73%, while September is more humid at 83%. For a more detailed look at June weather, check out Fort Myers weather in June.
When comparing the weather in September and July, we find that both months have similar average temperatures, around 28°C (82°F), with maximum temperatures peaking at 34°C (93–94°F). However, September tends to be slightly cooler with a minimum temperature of 21°C (71°F), compared to July's minimum of 23°C (73°F). In terms of precipitation, September experiences a total of 188 mm (7.4 in) over 21 days, which is less than July's 247 mm (9.7 in) over 27 days, indicating that July is not only wetter but also slightly more humid at 77% in comparison to September's 83%. For a more detailed look, check Fort Myers weather in July.
In comparing the weather of September and August, we notice a few notable differences. September features a slightly lower minimum temperature of 21°C (71°F) compared to August's minimum of 24°C (75°F), while the average and maximum temperatures remain consistent at around 28°C (82°F) and 34°C (94°F), respectively. However, September sees less precipitation overall, with 188 mm (7.4 in) falling over 21 days, compared to August's higher total of 239 mm (9.4 in) over 28 days. The humidity is marginally higher in September at 83%, compared to August’s 80%, contributing to a more muggy feeling despite the similar warm temperatures. For more details on August weather, you can check Fort Myers weather in August.
In September, the weather tends to be quite warm, with average temperatures around 28°C (82°F) and highs reaching up to 34°C (94°F). The month also sees significant rainfall, with 188 mm (7.4 in) of precipitation over 21 days, keeping humidity levels consistently high at 83%. In contrast, October brings a noticeable drop in nighttime temperatures, with minimums around 12°C (53°F) and an average of 26°C (80°F). While the maximum temperature remains relatively close at 33°C (92°F), the overall precipitation decreases to 86 mm (3.4 in) over just 13 days, maintaining the same humidity level of 83%. For more details on October weather, check out Fort Myers weather in October.
In September, the weather is significantly warmer, with minimum temperatures around 21°C (71°F) and average highs reaching up to 34°C (94°F). This month also experiences substantial rainfall, totaling 188 mm (7.4 in) over 21 days, and the humidity remains high at 83%. In contrast, November brings much cooler temperatures, with a minimum of 8°C (46°F) and average highs of 33°C (92°F). Precipitation drops dramatically to 47 mm (1.9 in) over just 7 days, while the humidity remains consistent at 83%. For more details on November weather, check out Fort Myers weather in November.
In September, the weather is characterized by warmer temperatures, with a minimum of 21°C (71°F) and an average high of 34°C (94°F). This month also sees significant rainfall, averaging 188 mm (7.4 in) over 21 days, resulting in high humidity levels of 83%. In contrast, December experiences much cooler temperatures, with a minimum of 6°C (43°F) and an average high of 30°C (86°F). Rainfall is considerably less, with only 46 mm (1.8 in) over just 5 days, while humidity remains relatively high at 84%. For more detailed information about the December weather, visit Fort Myers weather in December.
As summer wanes, September in Fort Myers brings a noticeable shift in weather patterns. While temperatures remain warm, with averages around 28°C (82°F), the increase in humidity often makes it feel more sultry compared to earlier months. Frequent rain showers, occurring on 21 days, contribute to a substantial precipitation total, creating a more tropical atmosphere. This combination of warmth and moisture stands in stark contrast to the drier conditions of the following months, making September a unique transition period. For more insights into the overall climate trends, check out Fort Myers Climate.