Last updated: February 24, 2025
September in Jacksonville Beach offers a warm and humid escape, with temperatures peaking at a maximum of 34°C (93°F) and averaging around 27°C (80°F). As the month progresses, the temperatures dip to a comfortable minimum of 18°C (65°F), providing pleasant evenings by the shore. However, this warmth comes with a significant precipitation total of 162 mm (6.4 in) over 17 rainy days, contributing to a high humidity level of 83%. Visitors can expect a tropical atmosphere, ideal for beachgoers who embrace the mix of sunshine and showers.
As summer wanes, September in Jacksonville Beach offers a delightful transition with temperatures averaging 27°C (80°F). The month begins with mild evenings, where temperatures dip to around 18°C (65°F), while daytime highs reach up to 34°C (93°F), providing the perfect balance for beachgoers. This slight cooling trend from the sweltering heat of July and August invites visitors to soak up the sun without the extreme humidity. With the ocean still warm, September is an ideal time for both relaxation and adventure, as the vibrant coastal atmosphere thrives before autumn sets in.
In September, Jacksonville Beach experiences significant precipitation, mirroring the trend set in the previous month with 162 mm (6.4 in) of rainfall across 17 days. This marks a continuation of the intense summer months, where July and August saw even higher totals at 186 mm and 162 mm, respectively. The frequency of rain, while slightly reduced compared to the height of summer, still demonstrates a lively coastal climate, maintaining the rhythm of the wet season. As the year transitions into autumn, the precipitation trends begin to taper off, signaling a gradual return to drier conditions in the months ahead.
September marks a notable shift in humidity levels at Jacksonville Beach, as the average humidity rises to 83%, slightly lower than the summer peak of 82% in both July and August. This month often serves as a transitional period, where the hot summer air begins to mingle with the upcoming fall, leading to a slight increase in moisture. As we compare September's humidity to earlier months, we see a trend where it holds relatively steady, staying above the average of 79% seen in October. With January's high of 84% looming just ahead, it’s clear that Jacksonville Beach maintains a rich humidity profile throughout the year, contributing to its lush landscapes and vibrant ocean life.
In September, Jacksonville Beach experiences a notable decline in the UV Index, settling at an impressive 10 which falls within the very high exposure category. This slight decrease from the peak 11 observed in the summer months signals a transition, yet caution is still warranted with a burn time of just 15 minutes. The trend of high UV exposure continues from the extreme levels of April through August, highlighting the importance of sun protection throughout the warmer months. As autumn approaches, residents and visitors should remain vigilant about sun safety, especially during midday hours. To learn more about the UV Index and stay protected, check out Jacksonville Beach UV Index.
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As summer begins to fade, September in Jacksonville Beach still basks in generous sunshine, offering an impressive 297 hours of sunlight—just shy of the peak summer months. Following the vibrant months of May and July, which boast over 330 hours, September maintains a bright ambiance, marking a transition into autumn while still embracing warm beach days. The sunlight hours dip slightly from August's 310, signaling a gradual change, yet the glow of early fall ensures that residents and visitors alike can still enjoy the beauty of the coastline. With October around the corner bringing in 288 hours, September is a reminder of summer's lingering warmth, inviting outdoor enthusiasts to relish in the sun-filled days before the season shifts fully into cooler temperatures.
In Jacksonville Beach, September brings a 37% chance of sunny weather, marking a dip from the warmer months of summer. While June, July, and August see the likelihood of sunshine plummet to as low as 19%, September offers a brief reprieve as the sun begins to reemerge before the arrival of autumn. This trend reflects the transitional nature of late summer into early fall, with conditions starting to shift towards milder weather. As temperatures cool, September's sunnier outlook invites beachgoers to savor the last remnants of summer bliss before the seasons change, making it a unique time to enjoy the coastal charm.
As September rolls in at Jacksonville Beach, the sun graciously shines for 12 hours a day, marking a subtle shift from the long, bright days of summer. Following June's peak of 14 hours, daylight begins its gentle decline towards the cozy rhythms of fall. The transition is evident as daylight in September mirrors the spring months of March and April, where nature awakens with vibrant energy. This month acts as a bridge, where lingering late-summer warmth still invites beachgoers, while the promise of cooler autumn days whispers through the air. As the days shorten, the inviting light of September creates a perfect canvas for outdoor adventures before the shorter daylight hours of October and November take hold.
As summer transitions to fall, September winds in Jacksonville Beach begin to gently settle, averaging a soft 2.7 m/s (6 mph)—the calmest speed of the year. This decrease is notable when compared to the breezy months of spring and summer, where the winds were more vibrant, peaking at 4.0 m/s (9 mph) in March and remaining robust during the warmer months. As the autumn breeze takes over, beachgoers might notice a serene shift, making September a tranquil time to enjoy the coast. With the wind steadily picking up again in October, there’s a promise of refreshing days ahead, bridging the calm of summer with the invigorating autumn air that follows.
The weather in Jacksonville Beach 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 Jacksonville Beach and find detailed weather information for every month.
In September, Jacksonville Beach experiences warm temperatures with a minimum of 18°C (65°F) and a high of 34°C (93°F), averaging around 27°C (80°F). The month sees significant rainfall, with 162 mm (6.4 in) of precipitation spread over 17 days, and humidity levels averaging a comfortable 83%. In stark contrast, January brings much cooler weather, with temperatures ranging from a minimum of -3°C (27°F) to a maximum of 27°C (80°F), resulting in an average of 14°C (57°F). Precipitation during this month is significantly lower at 42 mm (1.6 in) over just 5 days, all while maintaining a slightly higher humidity level of 84%. For a detailed look at what to expect, you can check out Jacksonville Beach weather in January.
September and February present contrasting weather profiles. September boasts a warmer climate, with temperatures ranging from a minimum of 18°C (65°F) to a maximum of 34°C (93°F), averaging around 27°C (80°F). This month also experiences significant rainfall, totaling 162 mm (6.4 in) across 17 days, accompanied by high humidity levels at 83%. In contrast, February is much cooler, with temperatures ranging from 2°C (35°F) to 29°C (84°F), averaging 17°C (62°F). Precipitation is lighter, totaling 71 mm (2.8 in) over 9 days, and humidity is slightly lower at 79%. For more specific details about February weather in this location, you can check Jacksonville Beach weather in February.
September and March present contrasting weather patterns. In September, temperatures are typically warmer, ranging from a minimum of 18°C (65°F) to a peak of 34°C (93°F) with an average of 27°C (80°F). The month is quite humid, with an average humidity of 83%, and experiences significant rainfall, totaling 162 mm (6.4 in) over 17 days. In stark contrast, March boasts cooler temperatures with a minimum of 2°C (36°F) and an average high of 31°C (89°F). Rainfall is considerably less in March, accumulating only 46 mm (1.8 in) over just 6 days, and the humidity is slightly lower at 78%. For a more detailed look at March weather, you can explore Jacksonville Beach weather in March.
September and April present contrasting weather patterns. In September, temperatures can reach a maximum of 34°C (93°F), creating a hot and humid environment with an average of 27°C (80°F) and a high humidity of 83%. The month also sees substantial rainfall, with around 162 mm (6.4 in) over approximately 17 days. In contrast, April is generally milder, with temperatures peaking at 32°C (90°F) and an average of 21°C (70°F). Precipitation is much lighter, totaling about 71 mm (2.8 in) over just 7 days, and the humidity is lower at 72%. For a detailed overview of conditions, visit Jacksonville Beach weather in April.
In comparing the weather of September and May, September tends to be warmer with an average temperature of 27°C (80°F) compared to May's 24°C (76°F). Both months can reach similar maximum temperatures, with September hitting 34°C (93°F) and May reaching up to 34°C (94°F). However, September experiences significantly more rainfall, with 162 mm (6.4 in) over approximately 17 days, versus May's 80 mm (3.1 in) across just 9 days. Humidity is also higher in September at 83%, while May enjoys a lower average of 72%. For more detailed information, you can explore Jacksonville Beach weather in May.
In comparing the weather of September and June, we find similarities and differences that characterize these months. Both months have a minimum temperature of 18°C (65°F) and reach a maximum of 34°C (93-94°F), indicating a consistent warmth. However, September tends to be slightly warmer on average with a mean temperature of 27°C (80°F), compared to June's 26°C (80°F). In terms of precipitation, September experiences more rainfall, averaging 162 mm (6.4 in) over 17 days, while June sees a touch less at 151 mm (5.9 in) across 20 days. Additionally, the humidity is higher in September at 83%, compared to June's 74%, contributing to a more muggy feel during that time. For detailed insights into June weather, you can visit Jacksonville Beach weather in June.
When comparing the weather in September to July, we observe a few key differences. September tends to have slightly cooler minimum temperatures, averaging 18°C (65°F) compared to July's warmer 23°C (73°F). However, both months share a similar average temperature of around 27°C (81°F) and maximum temperatures peaking at 34°C (93°F in September and 94°F in July). Rainfall is more frequent in July, with 186 mm (7.3 in) of precipitation over 23 days, while September sees slightly less at 162 mm (6.4 in) over 17 days. Humidity remains fairly high in both months, with September at 83% and July at 82%. For more details on the July weather, visit Jacksonville Beach weather in July.
In comparing the weather of September and August, we see some interesting distinctions. September typically experiences slightly cooler temperatures with a minimum of 18°C (65°F) compared to August's 23°C (74°F). While both months have a similar average temperature of around 27°C (80°F), August reaches slightly higher maximums at 35°C (96°F) versus September's 34°C (93°F). Precipitation levels remain the same at 162 mm (6.4 in) for both months, but August has more rainy days, totaling 24 compared to September’s 17 days. Humidity is fairly consistent, featuring 83% in September and just slightly lower at 82% in August, making both months feel quite muggy. For more detailed insights, you can check Jacksonville Beach weather in August.
September weather is characterized by warmer temperatures, with a minimum of 18°C (65°F) and an average of 27°C (80°F), reaching up to a sweltering 34°C (93°F). In contrast, October sees a noticeable drop in the minimum temperature to 8°C (47°F), although the average remains relatively warm at 24°C (76°F) and a maximum of 32°C (90°F). Precipitation is significantly higher in September, with 162 mm (6.4 in) over 17 days, compared to October's 92 mm (3.6 in) across 14 days. Furthermore, humidity levels are slightly lower in October at 79%, compared to September's 83%. For more detailed information, check out Jacksonville Beach weather in October.
September and November present a striking contrast in weather conditions. In September, temperatures range from a minimum of 18°C (65°F) to a scorching maximum of 34°C (93°F), with an average of 27°C (80°F). This month is also characterized by significant precipitation, totaling 162 mm (6.4 in) over 17 days, along with high humidity at 83%. In contrast, November's temperatures are much cooler, with a minimum of 3°C (37°F) and a more moderate maximum of 31°C (89°F), averaging at 18°C (65°F). Additionally, November sees considerably less rainfall, at 81 mm (3.2 in) over only 8 days, with humidity slightly lower at 82%. For more detailed insights on November weather, you can check out Jacksonville Beach weather in November.
The weather in September is markedly warmer and wetter compared to December. In September, temperatures range from a minimum of 18°C (65°F) to a maximum of 34°C (93°F), with an average of 27°C (80°F) and significant rainfall of 162 mm (6.4 in) over 17 days, resulting in high humidity levels around 83%. In contrast, December sees cooler temperatures, with a minimum of 0°C (33°F) and a maximum of 27°C (80°F), averaging 15°C (60°F). The month experiences much less rainfall, totaling only 75 mm (2.9 in) across 8 days, while humidity remains similar at 85%. For more specific insights on conditions during this time, you can refer to Jacksonville Beach weather in December.
As September unfolds at Jacksonville Beach, it ushers in a noteworthy transition in weather patterns compared to the sweltering summer months. With temperatures averaging around 27°C (80°F), this period offers a comfortable reprieve from the summer heat, despite occasional peaks of 34°C (93°F). However, the month is also marked by increased precipitation, seeing 17 days of rain that contribute to a higher overall humidity level of 83%. This makes September a time where sunny beach days can quickly turn into refreshing showers, creating a unique blend of summer remnants and autumn’s approach. For a deeper look at how Jacksonville Beach's climate evolves throughout the year, be sure to visit the Jacksonville Beach Climate page.