September Weather in Florida, United States

Last updated: February 24, 2025

In September, Florida experiences a warm climate characterized by a maximum temperature reaching 30°C (86°F), with an average of 16°C (61°F). The weather can be quite variable, as evidenced by occasional drops to a minimum of -1°C (30°F). This month sees about 119 mm (4.7 in) of precipitation spread over 10 days, contributing to a relatively humid atmosphere with an average humidity level of 72%. Whether enjoying sunny days or refreshing rains, September offers a diverse weather palette for residents and visitors alike.

September Temperature in Florida

In September, temperatures in Florida begin to signal the transition from the sweltering summer heat to the milder fall climate. With minimum temperatures around -1°C (30°F) and an average of 16°C (61°F), residents start to feel a slight reprieve from the relentless warmth of previous months. The maximum temperature peaks at a comfortable 30°C (86°F), offering perfect conditions for outdoor activities without the oppressive heat that typically defines the summer. This notable shift reflects the gradual cooling trend as the state moves closer to autumn, making September a delightful month for both residents and visitors to enjoy the state's natural beauty and vibrant culture.

September Weather in Florida: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Florida, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec222531435564706861503627
Data source: Temperature data for Florida 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 Florida

In September, Florida experiences a shift in rainfall patterns, receiving an average of 119 mm (4.7 inches) of precipitation over approximately 10 days. This marks a slight decrease compared to the heavier rains of the preceding summer months, particularly July which recorded the highest rainfall at 175 mm (6.9 inches). The drop in both precipitation amount and the number of rainy days suggests the tail end of the wet season, leading into a drier autumn. Notably, this trend continues into October, where precipitation rebounds to 173 mm (6.8 inches), indicating a transitional phase for Florida's climate as it gradually returns to a more typical pattern. Overall, September's rainfall plays a crucial role in replenishing waterways and supporting the lush landscapes that characterize the Sunshine State.

September Precipitation Trends in Florida

The chart displays monthly precipitation patterns in Florida, 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.
JanFebMarAprMayJunJulAugSepOctNovDec8911194153118106175133119173116128
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Florida

As summer transitions into fall, September in Florida sees a slight uptick in humidity, hovering around 72%. This marks a subtle rebound from the drier months of July and August, where humidity levels dipped to 66% and 64%, respectively. Despite the rise, September's humidity remains lower than the peak levels experienced at the beginning of the year, with January and February boasting a muggy 89% and 88%. Notably, the humid conditions begin to re-establish themselves as the state anticipates the cooler months, with October bringing a notable increase back up to 81%. This pattern highlights Florida's dynamic climate, where the lingering warmth of summer gently intertwines with the approaching autumn chill.

September Average Humidity in Florida

This chart illustrates the average monthly humidity levels in Florida, 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.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%84%76%72%67%64%72%81%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Florida

As summer gives way to fall, Florida's September UV Index reflects a slight dip in intensity, settling at a 7, which categorizes it as high. This decrease from the peak levels experienced in the summer months suggests an easing in sun exposure, though caution is still advisable with a burn time of just 25 minutes. Throughout the year, Florida experiences a dramatic shift in UV exposure; for instance, the index reached a high of 10 in May and June before gradually declining. September is a transitional month, where the high UV levels from summer begin to ease, yet the potential for skin damage still remains significant. For more detailed information on navigating Florida's UV risks throughout the year, visit Florida UV Index.

Maximum UV Index Levels in Florida for September

The chart shows the monthly maximum UV Index (UVI) for Florida 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.
JanFebMarAprMayJunJulAugSepOctNovDec34681010997642
Data source: Florida 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 Florida

As the summer heat begins to wane, September in Florida still basks in a generous 285 hours of sunshine, making it one of the sunniest months of the year. Following the summer peak in July and August with 329 and 330 hours respectively, the days remain bright and inviting, offering a continued taste of summer. This trend of abundant sunshine starts to taper off in the fall months, but September still delivers a vibrant atmosphere for outdoor activities and relaxation. Compared to earlier months, the sunshine hours in September remain significantly higher than those recorded in January and February, which only capture 129 and 171 hours respectively. This seasonal shift showcases Florida's unique charm, where the transition from summer to fall still gleams with plenty of sunny days, inviting both locals and tourists to enjoy the warm rays.

Monthly Sunshine Duration in Florida: September Highlighted

The September sunshine duration represents the total number of hours Florida 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.
JanFebMarAprMayJunJulAugSepOctNovDec129h171h240h230h272h321h329h330h285h206h180h154h
Data source: Florida September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Florida During September

September in Florida offers a 39% chance of sunny weather, positioning it favorably among the months of the year. While this percentage reflects a slight dip from the summer months of July and August, it holds its own compared to early spring, where the chance of sunshine can be as high as 55% in March. The transition into fall brings relief from the intense summer heat, with September often serving as a bridge to more temperate conditions. Although a bit cloudier than some months, the likelihood of enjoying sunny days remains promising as Floridians and visitors alike can still expect glimpses of sunshine amidst the changing season.

Percentage of Sunny Days in September in Florida

The chart illustrates the percentage of sunny days in Florida 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 Florida experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec40%27%55%41%33%41%31%30%39%38%49%24%
Data source: Florida September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Florida in September

As September rolls in, Florida experiences a gentle transition in daylight hours, with the sun gracing the state for about 12 hours each day. This marks a gradual decline from the peak sunshine of 15 hours in June, reflecting the natural ebb of summer's brightness. As the months progress, daylight diminishes further, with October and November yielding only 10 and 9 hours respectively. This rhythmic shift not only signals the approach of fall but also hints at the vibrant colors and cooler temperatures that await, inviting residents and visitors alike to savor the last of summer’s warmth before the shorter days of winter settle in.

Average Daylight Hours in Florida for September

The chart illustrates the variation in daylight duration in Florida throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 26m10h 33m11h 57m13h 24m14h 38m15h 15m14h 55m13h 49m12h 26m10h 59m9h 43m9h 4m
Data source: Florida daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Florida

As summer wanes into September in Florida, a gentle shift in wind patterns begins to emerge. With an average speed of 2.8 m/s (6 mph), September marks a slight uptick from the languid breezes of July and August, which recorded their lowest speeds of the year. This subtle increase is emblematic of the transition into fall, where winds begin to pick up just as the intense heat starts to ebb. Compared to earlier months, September offers a refreshing change without the previous summer's stifling calm, hinting at a promise of more invigorating breezes to come in the months ahead.

Average September Wind Speed in Florida

The chart displays monthly wind speed patterns in Florida, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.33.24.03.33.02.92.42.22.8 m/s2.83.23.4
Data source: Florida September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Florida Compares to Other Months

The weather in Florida 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 Florida and find detailed weather information for every month.

In comparing the weather of September and January, it's evident that these months have starkly different climates. September features a wide temperature range, with minimums of -1°C (30°F) and maximums that can reach up to 30°C (86°F), averaging a comfortable 16°C (61°F). It experiences 10 days of precipitation, accumulating 119 mm (4.7 in), and the humidity sits at a relatively moderate 72%. In contrast, January is characterized by much colder conditions, with minimum temperatures plummeting to -27°C (-17°F) and only reaching a maximum of 15°C (59°F), leading to an average of -6°C (22°F). This month also sees a higher humidity level of 89% and experiences 11 days of precipitation, but the total rainfall is lower at 89 mm (3.5 in). For those seeking warmer options, consider checking out Florida weather in January.

September and February present stark contrasts in weather. In September, temperatures range from a chilly 1°C (30°F) at night to a warm 30°C (86°F) during the day, with an average of 16°C (61°F). The month experiences around 119 mm (4.7 in) of precipitation across about 10 days, while humidity sits at a moderate 72%.

In contrast, February is much colder, with temperatures dipping as low as -27°C (-17°F) and averaging a frigid -4°C (25°F), although it can occasionally reach up to 21°C (70°F). Precipitation in February is slightly lower at 111 mm (4.4 in) over about 12 days, and humidity is higher at 88%.

For more information on weather patterns, particularly in warmer regions, check out Florida weather in February.

In comparing the weather of September and March, a stark contrast emerges. September experiences milder temperatures, with an average of 16°C (61°F) and a maximum of 30°C (86°F), while March is considerably colder, featuring an average temperature of 0°C (31°F) and a maximum of only 20°C (69°F). Precipitation levels are relatively close, with September recording 119 mm over 10 days and March slightly lower at 94 mm over 11 days. Humidity also differs, as September has a humidity level of 72%, compared to March’s 86%, making March feel especially damp and chilly. For those considering traveling to warmer regions, check out the specifics of Florida weather in March.

When comparing the weather in September and April, we see significant differences in temperature and precipitation patterns. In September, temperatures range from a minimum of -1°C (30°F) to a maximum of 30°C (86°F), with an average of 16°C (61°F). The month experiences about 119 mm (4.7 inches) of precipitation over approximately 10 days, accompanied by a humidity level of 72%. In contrast, April tends to be cooler, with temperatures ranging from a minimum of -9°C (16°F) to a maximum of 26°C (80°F) and an average temperature of 6°C (43°F). This month receives more precipitation, totaling 153 mm (6.0 inches) over 14 days, and has a slightly higher humidity level at 84%. For a detailed look at weather trends, check out Florida weather in April.

September and May present distinct weather patterns, despite their similar average precipitation levels of around 119 mm (4.7 in). In September, temperatures range more broadly, with a minimum of -1°C (30°F) and a maximum of 30°C (86°F), resulting in an average of 16°C (61°F). In contrast, May starts slightly cooler with a minimum of -2°C (28°F), an average of 13°C (55°F), and peaks with a maximum of 31°C (89°F). Additionally, September tends to be drier with about 10 days of precipitation compared to May’s 15 rainy days, although humidity lingers at a comparable level of 72% in September versus 76% in May. For a more detailed look at weather conditions specific to Florida during May, check out Florida weather in May.

In comparing the weather of September and June, both months exhibit mild temperatures with average highs reaching 30°C (86°F) in September and 32°C (90°F) in June. September tends to start cooler, with a minimum temperature of -1°C (30°F) compared to June's minimum of 2°C (36°F). Precipitation is slightly greater in September, with 119 mm over 10 days, while June sees 106 mm across 13 days. Interestingly, both months share the same humidity level of 72%. For more details on summer weather specifics, check out Florida weather in June.

When comparing the weather in September and July, notable differences emerge in both temperature and precipitation patterns. September experiences a broader temperature range, with minimums dipping to -1°C (30°F) and maximums reaching up to 30°C (86°F), averaging around 16°C (61°F). In contrast, July is warmer, with minimums at 9°C (48°F) and maximums climbing to 35°C (95°F), while the average temperature is 21°C (70°F). Regarding precipitation, July has a higher total of 175 mm (6.9 in) over 15 days compared to September's 119 mm (4.7 in) over 10 days, although September's humidity is slightly higher at 72%, compared to July's 66%. For more details on specific conditions, check out Florida weather in July.

In comparing the weather between September and August, we see a notable shift in temperatures and humidity levels. September experiences a wider temperature range, with minimums dropping to -1°C (30°F) and maximums reaching up to 30°C (86°F), while August maintains a milder temperature range, with minimums around 6°C (43°F) and maximums peaking at 31°C (88°F). Precipitation levels are slightly lower in September, totaling 119 mm (4.7 in) over 10 days, compared to August's 132 mm (5.2 in) over 13 days. Additionally, September exhibits higher humidity at 72%, compared to August's 64%. For more information about August weather patterns, you can visit Florida weather in August.

In comparing the weather patterns of September and October, October tends to be cooler and wetter. September boasts a wider temperature range with a minimum of -1°C (30°F) and a maximum of 30°C (86°F), while October's temperatures decrease significantly, with a minimum of -9°C (17°F) and a maximum of 25°C (78°F). Additionally, October experiences higher precipitation levels, accumulating 173 mm (6.8 in) over 13 days, compared to September's 119 mm (4.7 in) over 10 days. Humidity also rises slightly from September's 72% to October's 81%, contributing to a noticeably more humid atmosphere. For a more detailed comparison, check out the Florida weather in October.

September and November present contrasting weather patterns. In September, temperatures range from a chilly minimum of -1°C (30°F) to a warm maximum of 30°C (86°F), with an average of 16°C (61°F). This month sees around 119 mm (4.7 in) of precipitation over approximately 10 days and maintains a humidity level of 72%. In contrast, November experiences much colder temperatures, with a lower minimum of -24°C (-10°F) and a maximum reaching only 22°C (72°F), averaging around 2°C (36°F). Precipitation is similar, at 116 mm (4.6 in), but it occurs over 13 days, contributing to a higher humidity level of 87%. For those curious about weather patterns in different regions during this time, Florida weather in November provides an interesting comparison.

September and December present starkly contrasting weather patterns. September typically showcases milder temperatures, ranging from a minimum of -1°C (30°F) to a maximum of 30°C (86°F), with an average temperature of 16°C (61°F). Humidity during this month averages 72%, accompanied by 119 mm (4.7 in) of precipitation over about 10 days. In contrast, December brings much colder temperatures, with minimums plummeting to -25°C (-12°F) and averages around -3°C (27°F), peaking at only 14°C (57°F). The humidity rises to 84%, and precipitation increases slightly to 128 mm (5.0 in) over 13 days. This shift clearly illustrates the transition from the warm, humid conditions of early autumn to the frigid, damp weather typical of winter. For those interested, you can find more about weather in warmer climates by checking out Florida weather in December.

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Conclusion: What to Expect From September Weather in Florida

As September unfolds in Florida, the weather begins to shift, offering a blend of warmth and humidity that sets it apart from other months. With maximum temperatures still reaching a pleasant 30°C, the average cools to a refreshing 16°C, signaling the start of a transition into fall. Despite experiencing about 10 days of precipitation, the lush landscapes thrive, enriching the scenery. This month typically maintains a moderately high humidity level of 72%, contributing to the characteristic tropical feel, yet it’s notably less intense than the peak summer months. If you're curious to see how September weather compares more broadly to other seasons, explore the full details at Florida Climate.