Last updated: February 24, 2025
In North Key Largo, September unveils a tropical paradise marked by an average temperature of 28°C (83°F), peaking at 31°C (88°F) and dipping to a refreshing 25°C (77°F). However, this month is also characterized by a significant rainfall, accumulating 169 mm (6.6 in) over approximately 20 days, contributing to a lush, vibrant landscape. The humidity levels hover around 76%, adding to the sultry allure of this coastal destination. Whether basking in the sun or enjoying the cooling rains, September offers a unique blend of warmth and vitality for residents and visitors alike.
As September rolls in, North Key Largo continues to bask in the warmth of summer, with temperatures holding steady at a minimum of 25°C (77°F) and peaking at a comfortable 31°C (88°F). The average temperature hovers around 28°C (83°F), maintaining the pleasant warmth that characterizes the late summer months. This trend of high temperatures is consistent with the preceding months, particularly August, which sees similar stats, before transitioning into the cooler autumn days ahead. As the month progresses, the delightful heat offers a perfect backdrop for outdoor activities, while the lingering summer feels gently begin to yield to the milder weather that October promises.
In September, North Key Largo experiences a notable peak in precipitation, with an average of 169 mm (6.6 in) falling across 20 days. This increase marks a continuation of the rainy season that commences in May and showcases a steady rise in rainfall through the summer months. Following August’s 136 mm, September’s deluge signals a transition towards the drier fall months, as both October and November see lower amounts. Despite the wet conditions, the number of rainy days remains relatively high, hinting at the area's tropical climate where brief, intense showers are common. This trend reflects the region’s characteristic weather patterns, making September a decisive month in the annual precipitation cycle.
As September unfolds in North Key Largo, the humidity levels rise to 76%, marking a subtle yet noticeable bounce back from the summer's drier months. After hitting a low of 69% in June, humidity has slightly increased during the latter part of the summer, peaking at 72% in August. This transitional month sets the stage for the return of the wetter months ahead, with October and November seeing humidity levels climb back to 79% and 80%, respectively. While September offers a slight reprieve before the annual humidity cycle peaks in winter, it showcases the region's tropical charm, inviting residents and visitors alike to embrace the lingering warmth.
In September, North Key Largo experiences a consistently high UV Index of 12, placing it in the extreme exposure category with a burn time of just 10 minutes. This trend of elevated UV levels reflects the area's extended summer heat, where intense sun exposure becomes a norm from March through September. Notably, the UV Index reaches its peak in June, but September maintains this extreme level, indicating that sun safety precautions remain crucial as summer transitions into fall. As you plan your outdoor activities, it's essential to be vigilant and protect your skin. For a detailed understanding of UV levels throughout the year, visit North Key Largo UV Index.
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As September graces North Key Largo, the sun continues to shine brightly, offering an impressive 317 hours of sunlight throughout the month. This not only reflects a slight dip from the sun-drenched days of July and August, where locals basked in 347 and 342 hours respectively, but also highlights the region's extended summer vibe. The pattern reveals a gradual decline in daylight hours as the year progresses, with January trailing at just 228 hours. However, September still stands out as a radiant time, perfectly balancing warmth and relaxation as the area transitions towards fall. It's an ideal moment for sun-seekers to relish the last whispers of summer in this tropical paradise.
As September rolls in, the likelihood of sunny weather in North Key Largo tends to dip, with only a 32% chance of sunshine. This marks a notable decline compared to the early months of the year, where February boasts a robust 65% chance of clear skies. Following the summer months, which are characterized by significantly lower probabilities—down to 16% in June and 24% in July—September remains relatively cloudy. Interestingly, this month sits between the bright beginnings of the year and the sunnier spell that returns in October, which jumps back to 48%. While locals and visitors may hope for more sun, September feels like a transitional phase, hinting at a shift toward brighter days ahead.
In September, North Key Largo enjoys 12 hours of daylight, continuing the trend of abundant sunlight that peaked in the summer months. As the year transitions toward autumn, daylight begins to stabilize, having reached a high of 13 hours in June, July, and August. Following this summer surge, September maintains a comfortable balance of light, just as April and May did earlier in the year. This gradual tapering of daylight marks a shift towards shorter days in the coming months, reminding residents and visitors alike of the seasonal changes ahead.
In September, the winds in North Key Largo shift notably, averaging just 2.8 m/s (6 mph), making it the calmest month of the year. This decline in wind speed follows a gradual decrease from the summer months, where July sees a low of 3.6 m/s (8 mph) and August at 4.1 m/s (9 mph). The transition to September suggests a shift towards more tranquil weather patterns, ideal for relaxing by the sea or enjoying leisurely outdoor activities. As the year progresses, wind speeds tend to pick up again in October, emphasizing September's serene character amidst the dynamic coastal climate.
The weather in North Key Largo 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 North Key Largo and find detailed weather information for every month.
In September, the weather is characterized by high temperatures, with average lows around 25°C (77°F) and highs reaching up to 31°C (88°F), creating a warm and humid environment. In contrast, January offers a much cooler climate, with minimum temperatures dropping to 8°C (47°F) and average highs of 27°C (81°F). While September experiences considerable rainfall, with approximately 169 mm (6.6 in) over about 20 days, January sees a significantly drier month with only 35 mm (1.4 in) across just 7 days. This shift not only lowers the overall humidity slightly in January (81% compared to 76% in September) but also provides a refreshing break from the heat and humidity of the summer months. For a detailed look at January weather in North Key Largo, visit North Key Largo weather in January.
When comparing the weather in September and February, the differences are quite striking. September experiences significantly warmer temperatures, with average highs around 31°C (88°F) and a minimum of 25°C (77°F), while February sees cooler conditions, with an average high of 27°C (81°F) and a minimum of 12°C (54°F). Additionally, September is notably wetter, receiving 169 mm (6.6 in) of precipitation over approximately 20 days, compared to February's much drier 43 mm (1.7 in) over just 8 days. Humidity levels are relatively similar, with September at 76% and February slightly higher at 79%. For more detailed weather insights, you can check North Key Largo weather in February.
When comparing the weather in September and March, a clear contrast emerges. September is warmer, with average temperatures ranging from a minimum of 25°C (77°F) to a maximum of 31°C (88°F), while March is noticeably cooler, with average temperatures between 14°C (57°F) and 28°C (83°F). Additionally, September experiences significantly higher precipitation at 169 mm (6.6 in) over about 20 days, compared to just 35 mm (1.4 in) over 4 days in March. Despite both months having the same humidity level of 76%, the weather in March is generally drier and more comfortable for outdoor activities. For more details about the climate specifics, you can check this link: North Key Largo weather in March.
In September, the weather is notably warmer, with average temperatures around 28°C (83°F) and a high of 31°C (88°F), compared to April's milder average of 25°C (77°F) and maximum of 30°C (86°F). September also experiences significantly more rainfall, tallying up to 169 mm (6.6 in) over approximately 20 days, while April sees only 53 mm (2.1 in) of precipitation across 10 days. Humidity levels are slightly higher in September at 76%, compared to 73% in April. For a detailed look at April weather specifics, you can check North Key Largo weather in April.
In comparison to September, May experiences generally milder weather, with average temperatures ranging from a minimum of 20°C (69°F) to a maximum of 30°C (86°F), compared to September's warmer range of 25°C (77°F) to 31°C (88°F). While September sees higher humidity at 76% and more precipitation—169 mm (6.6 in) over about 20 days—May has slightly lower precipitation at 157 mm (6.2 in) over 15 days and reduced humidity at 71%. This makes May a more comfortable month overall in terms of climate. For more details on May weather, check out North Key Largo weather in May.
When comparing the weather in September and June, both months exhibit warm temperatures, with averages hovering around 28°C (82°F) to 28°C (83°F). However, September tends to be slightly wetter, receiving 169 mm (6.6 in) of precipitation over about 20 days, while June experiences a bit less with 132 mm (5.2 in) across 21 days. Additionally, humidity levels are higher in September at 76%, compared to June's 69%. This creates a more humid environment in September, making it feel warmer than the data suggests. For a more detailed breakdown of June weather, you can check North Key Largo weather in June.
In comparing the weather of September to that of July, we see some intriguing similarities and differences. Both months boast a minimum temperature of around 25°C (77°F) and an average of 28°C (83°F), offering a warm and pleasant climate. However, July's maximum temperature reaches slightly higher at 31°C (89°F) compared to September’s 31°C (88°F). A notable difference emerges in precipitation, where September experiences significantly more rainfall at 169 mm (6.6 in) over 20 days, whereas July sees 124 mm (4.9 in) of rain over 23 days. Additionally, September's humidity is higher at 76%, compared to July's 70%. For a deeper look at the weather during this time, you can visit North Key Largo weather in July.
In comparing the weather of September to August, we see a slight increase in precipitation and humidity as September experiences an average temperature of 28°C (83°F) compared to August's slightly warmer average of 29°C (84°F). Both months share the same maximum temperature of 31°C (88°F), but September records more rainfall with 169 mm (6.6 in) over 20 days, whereas August has 136 mm (5.4 in) over 22 days. Additionally, September's humidity rises to 76%, slightly higher than August's 72%. For more detailed information on August weather, you can visit North Key Largo weather in August.
September and October show a noticeable shift in weather patterns. In September, the temperatures are slightly warmer, with a minimum of 25°C (77°F) and a maximum of 31°C (88°F), averaging around 28°C (83°F). The month experiences more significant rainfall, accumulating 169 mm (6.6 in) over 20 days, with humidity levels at 76%. In contrast, October brings cooler temperatures, with a minimum of 17°C (62°F) and a maximum of 30°C (86°F), while maintaining an average of 27°C (81°F). Precipitation decreases slightly to 144 mm (5.7 in), also spread over 20 days, and humidity rises to 79%. For more detailed information, you can check North Key Largo weather in October.
Comparing the weather in September and November reveals a notable shift in temperature and precipitation patterns. September experiences warmer temperatures, with average highs reaching 31°C (88°F) and a high level of humidity at 76%. In contrast, November cools down significantly, with average temperatures dropping to 25°C (77°F) and nighttime lows hitting 14°C (57°F). Additionally, November sees less rainfall, accumulating 86 mm (3.4 in) over 13 days, while September has a much wetter profile with 169 mm (6.6 in) spread across 20 days. For more insights, you can check North Key Largo weather in November.
In September, North Key Largo experiences warm temperatures, with averages around 28°C (83°F) and highs reaching up to 31°C (88°F). This month also brings significant rainfall, averaging 169 mm over approximately 20 days, resulting in a high humidity level of 76%. In contrast, December presents a much cooler climate, with average temperatures dropping to 23°C (74°F) and maximums of 27°C (82°F). The precipitation also decreases significantly, with only 42 mm over about 8 days, while humidity rises slightly to 81%. For a closer look at December weather patterns, you can check North Key Largo weather in December.
As September arrives in North Key Largo, the weather begins to shift, marking a transition toward an even more humid and wet climate compared to previous months. While the temperatures remain warm and inviting, with an average hovering around 28°C (83°F), the increase in precipitation and high humidity at 76% often leads to a greater likelihood of rain, impacting outdoor activities. This month frequently sees about 20 days of rain, making it notably wetter than the sunny summer peak. For those looking to plan their visit, it’s essential to keep an eye on the weather conditions as September brings a unique blend of warmth and moisture that sets it apart from the drier months. For more details on what to expect year-round, check the full North Key Largo Climate information.