September Weather in Fernandina Beach, United States

Last updated: February 24, 2025

In September, Fernandina Beach experiences a warm, tropical climate characterized by a maximum temperature reaching up to 34°C (94°F) and a pleasant average of 26°C (80°F). However, the month also brings a fair amount of precipitation, totaling 155 mm (6.1 in) over 16 days, contributing to the high humidity levels of 83%. This blend of warmth and moisture creates a vibrant atmosphere, perfect for enjoying the natural beauty and activities the area has to offer, making it an ideal month for those who appreciate a lively beach environment.

September Temperature in Fernandina Beach

In September, Fernandina Beach enjoys a warm and inviting climate, with average temperatures hovering around 26°C (80°F). The month begins with a comfortable minimum of 18°C (64°F), gradually rising to daytime highs that can reach up to 34°C (94°F). Compared to the sweltering summer months, where temperatures consistently peak at 34°C, September offers a slight reprieve while maintaining that balmy beach vibe. This transitional period hints at the cooler autumn days just around the corner, making it a perfect time for both locals and visitors to savor the last traces of summer warmth before the temperatures dip.

September Weather in Fernandina Beach: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Fernandina Beach, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec566064697579818180756459
Data source: Temperature data for Fernandina Beach generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Fernandina Beach

In September, Fernandina Beach experiences a noteworthy precipitation pattern, with a total of 155 mm (6.1 in) of rain falling over 16 days. This marks a slight decrease from the heavy rainfall of the previous two months, August and July, which witnessed 172 mm and 170 mm, respectively. The trend indicates that as summer transitions to fall, rainfall begins to taper off, yet September still retains significant moisture. This precipitation is crucial for replenishing local water sources, sustaining the lush greenery that characterizes the region. As the days shorten and temperatures cool, the shifts in rainfall patterns not only signal seasonal change but also set the stage for the drier months ahead.

September Precipitation Trends in Fernandina Beach

The chart displays monthly precipitation patterns in Fernandina Beach, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec5171446680145170172155788086
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Fernandina Beach

In September, Fernandina Beach experiences a notable increase in humidity, peaking at 83%, which mirrors the high levels of the preceding summer months. This slight uptick from August's 82% reflects the lingering warmth of late summer. As the year progresses, humidity begins to gradually decline, dropping to 79% in October and fluctuating between 79% and 85% in the cooler months. Overall, the data showcases a clear trend: summer brings elevated humidity levels that taper off as fall takes hold, providing residents and visitors with a dynamic climate throughout the year.

September Average Humidity in Fernandina Beach

This chart illustrates the average monthly humidity levels in Fernandina Beach, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec84%79%78%73%72%74%82%82%83%79%82%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Fernandina Beach

In September, Fernandina Beach experiences a very high UV Index of 10, with a burn time of just 15 minutes—a slight decrease from the peak summer months but still indicative of strong sun exposure. As the summer heat transitions into fall, it's crucial to remain vigilant and protect your skin during outdoor activities, as the UV Index in September remains significantly high compared to earlier months like January or November. This trend illustrates the lingering intensity of the sun as the days gradually shorten, emphasizing the importance of sun safety. For more detailed insights and daily updates, visit Fernandina Beach UV Index.

Maximum UV Index Levels in Fernandina Beach for September

The chart shows the monthly maximum UV Index (UVI) for Fernandina Beach in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec579101111111110864
Data source: Fernandina Beach September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Fernandina Beach

As September unfolds in Fernandina Beach, the sun continues to shine brightly, contributing 296 hours of glorious sunlight. This marks a gentle transition from the exuberance of summer, with July and August both basking in over 328 and 311 hours respectively. Notably, September's daylight hours are still robust, although they exhibit a slight decline as the days begin to shorten in preparation for fall. Interestingly, the trend shows that after the peak in May, when sunny days reach their zenith at 332 hours, the gradual decrease in sunlight creates a serene atmosphere, perfect for enjoying the vibrant natural beauty and mild temperatures of the beach. As the year progresses towards October, the comforting warmth of September allows residents and visitors alike to savor one last taste of summer bliss before the sun's retreat into the cooler months ahead.

Monthly Sunshine Duration in Fernandina Beach: September Highlighted

The September sunshine duration represents the total number of hours Fernandina Beach experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec198h210h292h301h332h300h328h311h296h287h241h224h
Data source: Fernandina Beach September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Fernandina Beach During September

In September, residents and visitors of Fernandina Beach can expect a 41% chance of sunny weather, which slightly dips from the preceding months of April and May, both boasting a 50% likelihood. This month sits notably above the summer swelter, where sunshine chances plummet to just 19% in June and linger at 20% in August. Interestingly, that late-summer dip gives way to a gradual recovery in October, returning to a 50% chance of sunshine. Overall, while September may not shine as brightly as some spring months, its weather holds promise, keeping hope alive for sunny days by the sea as autumn approaches.

Percentage of Sunny Days in September in Fernandina Beach

The chart illustrates the percentage of sunny days in Fernandina Beach throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Fernandina Beach experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec43%39%40%51%51%19%26%21%41%50%51%45%
Data source: Fernandina Beach September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Fernandina Beach in September

As summer fades into autumn, September in Fernandina Beach offers a gentle transition with 12 hours of daylight. This marks a decrease from the sun-drenched 14 hours in June and the consistent 13 hours of daylight enjoyed during July and August. The shortening days signal the impending arrival of fall, with daylight gradually tapering off to 11 hours in October. Despite this shift, September remains a vibrant month, allowing plenty of time to soak up the last rays of summer before the cooler months settle in. The gradual cycle of daylight through the year highlights the natural rhythm of the seasons, inviting residents and visitors alike to savor the beauty of a coastal sunset.

Average Daylight Hours in Fernandina Beach for September

The chart illustrates the variation in daylight duration in Fernandina Beach throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 23m11h 5m12h12h 56m13h 42m14h 5m13h 53m13h 11m12h 18m11h 22m10h 34m10h 10m
Data source: Fernandina Beach daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Fernandina Beach

As the summer winds down in Fernandina Beach, September greets residents and visitors with a gentle breeze, boasting an average wind speed of just 2.9 m/s (7 mph). This marks a significant dip compared to the more spirited gusts of earlier months, reflecting a seasonal trend where winds typically ease after the height of summer. From June to August, the winds hovered around 3.1 m/s, but as autumn approaches, a noticeable calmness sets in, hinting at the transition from the vigorous warmth of summer to the cooler embrace of fall. Interestingly, this trend reverses in the following months, with November bracing for renewed briskness as wind speeds pick up once more, returning to an average of 4.0 m/s (9 mph). Thus, September stands as a tranquil prelude, embodying the serene beauty of the coast before the inevitable shift toward a livelier autumn.

Average September Wind Speed in Fernandina Beach

The chart displays monthly wind speed patterns in Fernandina Beach, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.83.94.33.74.13.63.13.12.9 m/s3.24.03.5
Data source: Fernandina Beach September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Fernandina Beach Compares to Other Months

The weather in Fernandina 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 Fernandina Beach and find detailed weather information for every month.

When comparing the weather in September and January, notable differences emerge. September experiences warmer temperatures with a minimum of 18°C (64°F) and an average of 26°C (80°F), peaking at 34°C (94°F). In contrast, January's temperatures drop significantly, with a minimum of -3°C (28°F) and an average of 13°C (56°F), reaching a maximum of 27°C (80°F). Additionally, September is characterized by higher precipitation, with 155 mm (6.1 in) falling over 16 days, while January sees much less rain, with only 51 mm (2.0 in) over 5 days. Humidity remains fairly consistent between the two months, with September at 83% and January at 84%. For more detailed information, you can explore Fernandina Beach weather in January.

September and February present contrasting weather patterns. September typically boasts warmer temperatures, ranging from a minimum of 18°C (64°F) to a maximum of 34°C (94°F), while February sees cooler conditions with temperatures ranging from 1°C (35°F) to 27°C (81°F). Additionally, September is characterized by higher humidity at 83% and considerable precipitation, accumulating 155 mm (6.1 in) over approximately 16 rainy days. In contrast, February experiences significantly less precipitation at 71 mm (2.8 in) over just 9 days and maintains a humidity level of 79%. For a comprehensive look at the February climate, check out Fernandina Beach weather in February.

September and March display striking contrasts in weather conditions. In September, temperatures range from a minimum of 18°C (64°F) to a scorching maximum of 34°C (94°F), with an average of 26°C (80°F). The month is also characterized by significant rainfall, totalling 155 mm (6.1 in) over 16 days, while humidity remains high at 83%. Conversely, March offers a much cooler atmosphere, with temperatures starting at a minimum of 1°C (35°F) and peaking at 31°C (88°F), averaging around 18°C (64°F). Precipitation drops to 44 mm (1.7 in) spread across just 6 days, and humidity decreases slightly to 78%. For those interested in exploring the specifics of March weather, additional details can be found here: Fernandina Beach weather in March.

In comparing the weather between September and April, we see a noticeable contrast. September boasts warmer temperatures, with a minimum of 18°C (64°F) and an average high of 34°C (94°F). The month also experiences higher humidity at 83%, alongside significant rainfall of 155 mm (6.1 in) over 16 days, making it one of the wetter months of the year. In contrast, April features a cooler climate, with temperatures ranging from a low of 7°C (45°F) to a more moderate average of 21°C (69°F) and a maximum of 32°C (89°F). Additionally, April enjoys lower humidity at 72% and much less precipitation, totaling 66 mm (2.6 in) over just 7 days. For more details on the weather in this lovely month, check Fernandina Beach weather in April.

When comparing the weather in September and May, several key differences emerge. September experiences higher average temperatures, with a minimum of 18°C (64°F) and a maximum of 34°C (94°F), while May’s temperatures range from a minimum of 13°C (55°F) to a maximum of 35°C (95°F). Although May has a slightly higher maximum temperature, September tends to be warmer overall due to its higher average. In terms of precipitation, September is notably wetter, receiving 155 mm (6.1 in) over 16 days, compared to May’s 80 mm (3.2 in) over just 10 days, indicating that September is more prone to rain and humidity, averaging 83% as opposed to May’s 72%. For a closer look at May weather specifics, you can check Fernandina Beach weather in May.

When comparing the weather in September and June, we see some notable similarities and differences. Both months have an average temperature of 26°C (80°F) and a maximum temperature reaching up to 34°C (94°F). However, September tends to be slightly warmer at night with a minimum temperature of 18°C (64°F), compared to June's minimum of 19°C (66°F). Precipitation levels are also comparable, with September receiving slightly more rain at 155 mm (6.1 in.) over 16 days, while June sees 145 mm (5.7 in.) of rain spread over 19 days. Humidity is higher in September at 83%, compared to June's 74%, making September feel more muggy. For more specific details about June weather, you can visit Fernandina Beach weather in June.

The weather in September tends to be slightly cooler compared to July, with average temperatures ranging from a minimum of 18°C (64°F) to a maximum of 34°C (94°F) and an overall average of 26°C (80°F). In contrast, July's temperatures are higher, featuring minimums of 23°C (73°F) and an average of 27°C (81°F). Both months experience significant rainfall, but September receives 155 mm (6.1 in) over 16 days, whereas July sees 170 mm (6.7 in) across 22 days, indicating a wetter July. Notably, humidity levels are quite similar, with September at 83% and July at 82%. For more detailed information, you can check out Fernandina Beach weather in July.

When comparing the weather in September to August, September experiences slightly lower minimum temperatures, with a minimum of 18°C (64°F) compared to August's 23°C (73°F). The average temperature remains similar, with September at 26°C (80°F) and August at 27°C (82°F). Both months have the same maximum temperature of 34°C (94°F). In terms of precipitation, September sees a total of 155 mm (6.1 in) over 16 days, while August has higher precipitation at 172 mm (6.8 in) over 25 days. Interestingly, September's humidity is slightly higher at 83%, compared to August's 82%. For a closer look at the weather patterns in August, you can check Fernandina Beach weather in August.

September tends to be warmer and more humid than October, with average temperatures around 26°C (80°F) and maximums reaching up to 34°C (94°F). It also experiences significantly more rainfall, totaling 155 mm (6.1 in) over 16 days. In contrast, October sees a drop in minimum temperatures to 8°C (46°F) while maintaining a comfortable average of 24°C (75°F) and maxing out at 32°C (90°F). Precipitation decreases to 78 mm (3.1 in) over 13 days, with slightly lower humidity levels at 79%. For more detailed information about October weather, you can check out Fernandina Beach weather in October.

In comparing the weather between September and November, it's evident that September is marked by much warmer temperatures, with averages around 26°C (80°F) and highs reaching up to 34°C (94°F). The month sees significant rainfall, totaling 155 mm (6.1 in) over 16 days and high humidity levels at 83%. In contrast, November experiences a dramatic drop in nighttime temperatures to a minimum of 2°C (36°F) and average temperatures of 18°C (64°F), while still allowing for warm daytime highs of 31°C (87°F). This month is notably drier, with only 80 mm (3.1 in) of precipitation occurring over just 7 days, and humidity slightly lower at 82%. For more detailed information, you can check out Fernandina Beach weather in November.

September weather is characterized by warm temperatures, with a minimum of 18°C (64°F) and an average of 26°C (80°F), peaking at 34°C (94°F). This month also sees significant rainfall, averaging 155 mm (6.1 in) over 16 days, and high humidity levels around 83%. In contrast, December experiences much cooler conditions, with temperatures dropping to a minimum of 0°C (32°F) and averaging 15°C (59°F), while the maximum reaches 26°C (78°F). Precipitation is notably lower in December, totaling 86 mm (3.4 in) over just 7 days, and humidity remains relatively high at 85%. For more details on December weather, you can visit Fernandina Beach weather in December.

Compare Fernandina Beach's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Fernandina Beach

As summer transitions into fall, September in Fernandina Beach brings a unique blend of warmth and moisture. With daytime temperatures reaching a maximum of 34°C (94°F) and an average of 26°C (80°F), the month remains notably warm, contrasting sharply with the cooler winter months. However, the increased humidity at 83% and 16 days of precipitation, totaling 155 mm (6.1 in), set September apart from the drier summer months. This combination of heat and rain not only enhances the lushness of the landscape but also creates a vibrant atmosphere for outdoor activities. To delve deeper into how September weather fits into the bigger picture, explore more about the Fernandina Beach Climate.