Last updated: February 24, 2025
In Key Biscayne, August unveils a warm tropical embrace, with maximum temperatures reaching 32°C (90°F) and an average of 28°C (83°F). However, the minimum can dip to a comfortable 25°C (76°F), offering respite from the heat. This month is characterized by substantial rainfall, accumulating to 181 mm (7.1 in) across approximately 25 days, contributing to the lush landscape and vibrant ecosystems. Humidity hovers around 72%, adding to the typical summer atmosphere, making it essential for visitors to stay hydrated and prepared for sudden showers amidst their beachside activities.
In Key Biscayne, August brings a delightful warmth, with temperatures hovering between a minimum of 25°C (76°F) and a maximum of 32°C (90°F). The average temperature rests comfortably at 28°C (83°F), seamlessly continuing the summer trend observed throughout the preceding months. As the hottest month of the year, August showcases a slight uptick in warmth compared to July's max of 33°C (92°F), indicating a peak in tropical bliss. With relatively consistent temperatures, this month reflects the charming allure of summer in this coastal paradise, inviting both locals and visitors to bask in the sun and enjoy water activities in the inviting ocean.
August stands out in Key Biscayne as one of the wettest months, recording 181 mm (7.1 in) of precipitation over 25 days of rainfall. This surge marks a notable increase from the preceding months, reflecting the peak of the rainy season. Following the trend established in the summer, both June and July also experienced high precipitation levels, yet August continues the upward trajectory. The persistent rainfall during this month not only highlights the area's tropical climate but also sets the stage for the transition into September, which typically sees even greater rainfall. Overall, while August packs a punch with its abundant showers, it serves as a prelude to the wetter conditions that often characterize the subsequent month.
In Key Biscayne, August brings a slight uptick in humidity, averaging 72%—a modest increase from the lower levels seen in late spring and early summer. This trend marks a transition toward the wetter months, as humidity begins to rise again after dipping to its lowest point of 69% in June. Interestingly, as the year progresses, a more humid atmosphere becomes prominent, with the dampness peaking later in the year, particularly in September when levels jump back up to 76%. This pattern illustrates how Key Biscayne's climate transitions from the drier heat of summer to the more humid conditions typical of fall.
In August, Key Biscayne experiences an extreme UV Index of 12, and with a recommended burn time of just 10 minutes, sun safety becomes a priority for residents and visitors alike. This trend of increasing intensity through the summer months peaks in June but remains particularly high in July and August before tapering slightly into September. As we move from the high UV exposures of earlier months, such as January's UV Index of 6, it's crucial to recognize the pattern of heightened risk, especially from April through September, when the UV ratings consistently fall within the extreme or very high categories. To protect your skin during this time, consider checking detailed forecasts at Key Biscayne UV Index.
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As August unfolds in Key Biscayne, visitors can bask in the warmth of 340 hours of glorious sunshine, a perfect prelude to the falling autumn leaves. This radiant month typically enjoys only a slight dip from the sun-soaked enjoyment of July, which boasts 344 hours, marking the peak of summer bliss. The trend leading up to August clearly showcases a splendid pattern, with each month offering an abundance of sunshine, particularly from April onwards, where hours consistently surpass the 300-hour mark. Even as the year progresses into the cooler months, September maintains a robust 314 hours of sunlight, reinforcing Key Biscayne's allure as a year-round destination for sun-seekers.
In Key Biscayne, August typically presents a lower likelihood of sunny weather, with only a 24% chance of sunshine. This marks a notable decline from the sunnier winter months, where the chances climb to 60% in February and 44% in October. As summer progresses, the shift becomes evident, with June and July exhibiting particularly gloomy prospects, at just 15% and 19% respectively. This trend illustrates a peak in cloud cover during the dog days of summer, making August one of the wettest months, overshadowed by its predecessors, hinting at the need for pairs of flip-flops and an umbrella rather than beach towels.
In Key Biscayne, August marks a slight transition in daylight duration, offering 12 hours of sunlight, which is consistent with the preceding month of July. This reflects a peak summer experience, where the days are long and vibrant. As the summer progresses, daylight hours gradually decline from a lively 13 hours in May through July to 12 hours in August, hinting at the approaching fall. Following this trend, daylight begins to taper off into the autumn months, with September maintaining the same 12 hours before a steady descent to 10 hours by December. This rhythm of increasing and decreasing light not only defines the seasons but also enhances the region's charm, drawing both locals and visitors to embrace the outdoor splendor of each changing month.
In Key Biscayne, August brings a gentle breeze with an average wind speed of 3.4 m/s (8 mph), slightly picking up from the warmth of July's calm conditions at 3.1 m/s (7 mph). As summer peaks, the wind remains relatively stable, maintaining a light coastal feel, perfect for beachgoers seeking a refreshing respite from the heat. Notably, August's winds are a prelude to the seasonal shift, with speeds gradually declining as autumn approaches, where September sees a further drop to 2.4 m/s (5 mph). This trend reflects a typical summer pattern in the region, where dynamic air currents fluctuate throughout the year, adding to the charm of Key Biscayne's coastal climate.
The weather in Key Biscayne changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of August's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Key Biscayne and find detailed weather information for every month.
August and January offer contrasting weather experiences. In August, temperatures are considerably warmer, with a minimum of 25°C (76°F) and an average of 28°C (83°F), peaking at 32°C (90°F). This month also sees significant rainfall, with 181 mm (7.1 in) expected over 25 days, leading to a humid environment at 72%. In stark contrast, January presents cooler conditions, featuring a minimum temperature of 7°C (44°F) and an average of 21°C (70°F), reaching a maximum of 28°C (83°F). Additionally, January experiences much less rainfall, with only 34 mm (1.3 in) over 6 days, while humidity rises slightly to 81%. For more detailed weather insights, check out Key Biscayne weather in January.
August and February present contrasting weather patterns. In August, temperatures soar, with minimums around 25°C (76°F) and highs reaching 32°C (90°F), along with significant humidity at 72% and substantial rainfall totaling 181 mm (7.1 in) over 25 days. In stark contrast, February offers milder conditions, with a minimum temperature of 10°C (51°F) and an average of 23°C (73°F), along with considerably less precipitation at 50 mm (2.0 in) spread across just 9 days. The humidity is slightly higher in February at 79%, but overall, the month is far drier and cooler than the sweltering August heat. For more details, check out Key Biscayne weather in February.
When comparing the weather in August and March, notable differences emerge in temperature and precipitation. August boasts warmer temperatures with minimums around 25°C (76°F) and averages reaching 28°C (83°F), while March has cooler lows at 12°C (54°F) and an average of 23°C (73°F). Additionally, August is significantly wetter, recording 181 mm (7.1 in) of precipitation over 25 days, in contrast to March's 30 mm (1.2 in) spread over just 5 days. Both months share high humidity, though August's average of 72% is slightly lower than March's 76%. For more detailed information, check out Key Biscayne weather in March.
When comparing the weather in August and April, notable differences emerge. August tends to be warmer, with average temperatures ranging from a minimum of 25°C (76°F) to a maximum of 32°C (90°F), while April sees lower temperatures, starting at a minimum of 15°C (59°F) and averaging 25°C (77°F). Precipitation is significantly higher in August, with 181 mm (7.1 in) falling over 25 days, compared to April's 63 mm (2.5 in) over just 11 days. Both months exhibit high humidity levels, with April at 73% and August slightly lower at 72%. For more details on April's climate, check out Key Biscayne weather in April.
In comparing the weather between August and May, August typically features warmer temperatures, with a minimum of 25°C (76°F) and an average of 28°C (83°F), while May starts off cooler with a minimum of 19°C (66°F) and an average of 26°C (79°F). Both months experience high humidity, but August tends to feel slightly hotter with an average humidity of 72%, compared to May's 71%. Precipitation is also a factor, as August sees more rain with 181 mm (7.1 in) over 25 days, while May has slightly less, at 161 mm (6.3 in) over 18 days. For more detailed information on May's weather, you can visit Key Biscayne weather in May.
In comparing the weather between June and August, we see that both months have similar temperature ranges, with average highs reaching 32°C (90°F) and lows around 24-25°C (75-76°F). However, August tends to be slightly wetter, receiving 181 mm (7.1 in) of precipitation over 25 days, compared to June's 172 mm (6.8 in) across 22 days. Additionally, humidity levels are a bit higher in August at 72%, compared to June's 69%. For more specific details on June weather, you can refer to Key Biscayne weather in June.
In comparing the weather between July and August, we see slight differences in temperature and precipitation. July features minimum temperatures around 24°C (76°F) and maximums reaching 33°C (92°F), while August's minimums rise slightly to 25°C (76°F) and maximums decrease to 32°C (90°F). Precipitation is quite similar, with July receiving 173 mm (6.8 in) over 26 days compared to August's 181 mm (7.1 in) over 25 days. The humidity remains relatively consistent, with July at 70% and August slightly higher at 72%. For a more detailed look into July's weather, you can visit Key Biscayne weather in July.
In August, the weather typically features a minimum temperature of 25°C (76°F) and an average of 28°C (83°F), with a maximum of 32°C (90°F). This month experiences substantial rainfall, totaling 181 mm (7.1 in) across 25 days, and maintains a humidity level of 72%. In contrast, September presents a slightly altered climate, with a minimum temperature of 24°C (75°F), an average of 28°C (82°F), and a maximum temperature of 33°C (91°F). Precipitation increases to 203 mm (8.0 in) over 22 rainy days, contributing to a higher humidity of 76%. To explore how these patterns specifically manifest in Key Biscayne, check out Key Biscayne weather in September.
In comparing the weather between August and October, it’s clear that August tends to be warmer, with average temperatures peaking at 28°C (83°F) and maximums reaching 32°C (90°F). In contrast, October features a more moderate climate, with temperatures averaging 27°C (81°F) and maxing out at 30°C (87°F). While August experiences higher precipitation levels at 181 mm (7.1 in) over 25 days, October sees a slight decrease in rainfall to 157 mm (6.2 in) across 22 days. Additionally, humidity levels are somewhat higher in October at 79%, compared to 72% in August. For a more detailed look at the weather, check out Key Biscayne weather in October.
August and November present distinctly different weather patterns. In August, temperatures are consistently warm, with a minimum of 25°C (76°F) and an average of 28°C (83°F), peaking at 32°C (90°F). However, the month also experiences significant rainfall, totaling 181 mm (7.1 in) over 25 days, coupled with a humidity level of 72%. In contrast, November brings a noticeable cooling, with a minimum temperature of 12°C (54°F) and a comfortable average of 24°C (76°F), reaching a maximum of 30°C (86°F). Rainfall is also reduced in November, with only 93 mm (3.7 in) across 14 days, along with a higher humidity level of 80%. For more details on November conditions, visit Key Biscayne weather in November.
August weather is characterized by warm temperatures, with nighttime lows around 25°C (76°F) and daytime highs peaking at 32°C (90°F). It's also quite humid, averaging 72%, and sees significant rainfall, with 181 mm (7.1 in) over about 25 days. In contrast, December offers a much cooler climate, with temperatures ranging from a minimum of 11°C (51°F) to a maximum of 29°C (84°F) and an average of 22°C (72°F). The precipitation is notably less, at only 41 mm (1.6 in) over just 9 days, and humidity reaches a higher level of 81%. For more detailed insights on the December climate, you can visit Key Biscayne weather in December.
As August unfolds in Key Biscayne, the weather offers a sultry embrace, marked by warm temperatures that reach their peak this month. With an average high that hovers around 32°C (90°F) and a balmy humidity of 72%, the atmosphere feels distinctly tropical, leading to frequent rain showers—often totaling 181 mm (7.1 in) across 25 days. Unlike the drier months of the year, August beckons visitors and locals alike to enjoy the lush, green landscapes, though it’s wise to be prepared for those sudden downpours. For those curious about the overall climate patterns, you can explore more at Key Biscayne Climate.