Last updated: February 24, 2025
In August, Key West, United States, experiences warm tropical conditions, with average temperatures reaching a pleasant 29°C (84°F). Daily maximums can soar to 30°C (87°F), while the evenings cool slightly to a minimum of 25°C (78°F). However, visitors should be prepared for some rain, as the region sees an average precipitation of 100 mm (3.9 in) across approximately 15 days, contributing to a humidity level of 72%. This combination of warmth and moisture creates the perfect ambiance for enjoying the vibrant local culture while embracing the lush, natural beauty that Key West has to offer.
In Key West during August, the temperatures reach their peak, creating an inviting atmosphere for sun-seekers. With a minimum temperature of 25°C (78°F) and an average soaring to 29°C (84°F), the warm embrace of summer is unmistakable. The mercury hovers around a comfortable max of 30°C (87°F), aligning with the trend of gradually increasing temperatures experienced since the onset of the warmer months. As the summer season progresses from June to August, both the minimum and average temperatures rise noticeably, culminating in this tropical heat. This balmy weather not only sets the stage for beach outings and water activities but also underscores the laid-back charm of island life during one of its hottest months.
In Key West, August brings a notable shift in precipitation patterns, with 100 mm (3.9 in) of rain distributed over 15 days—a continuation of the wet season that began in May. This mid-summer month experiences consistently high humidity, leading to tropical showers that enhance the lush scenery. Following July’s precipitation of 103 mm (4.0 in), August remains relatively stable, indicating a trend of sustained rainfall during peak summer. As the wet season progresses into September, precipitation climbs significantly, peaking at 172 mm (6.8 in), suggesting that August serves as a prelude to even wetter conditions that lie ahead. The frequency of rainy days in August aligns with the growing warmth, reinforcing the seasonal shift and the tropical charm of the region.
In August, Key West experiences a humidity level of 72%, marking a slight increase from the lower averages found in the preceding summer months of June and July. This trend highlights a gradual rise as the year progresses, with humidity levels being highest in the winter months of January and December at 81%. As summer transitions to fall, August sits comfortably between the more humid eves of July and the upcoming spikes in September, illustrating a unique blend of tropical warmth and noticeable moisture that characterizes this vibrant destination. Notably, the humidity remains relatively stable throughout the year, suggesting that while August offers a mingling of summer sun and humidity, it is a common feature of Key West's alluring climate.
In August, Key West continues to see a high UV Index of 12, maintaining its status in the extreme exposure category alongside the previous months of June and July. This consistent trend highlights the importance of protecting your skin from harmful rays, as the burn time remains a swift 10 minutes. As summer rolls on, it's crucial for sun worshippers and outdoor enthusiasts to stay vigilant. With similar levels observed since April, early precautions are key for safe enjoyment of the beautiful Florida sunshine. For more details on UV exposure trends throughout the year, check out the Key West UV Index.
UV Risk Categories
In August, Key West basks in a delightful 340 hours of sunshine, continuing the trend of vibrant summer days that began in June. This month holds steady alongside April and May, showcasing the region's remarkable consistency in sun-kissed weather. Comparatively, July shines the brightest with 351 hours, yet August retains the high luminosity typical of summer, making it an ideal time for beach lovers and outdoor enthusiasts alike. With September poised to offer 320 hours, the sun-drenched days of Key West linger just a little longer, inviting visitors to soak up the warmth before the seasons shift. Overall, the summer months in this tropical paradise are defined by abundant sunshine, ensuring that every day feels like a getaway wrapped in golden rays.
When considering the likelihood of sunny weather in August in Key West, the statistics reveal a notable decline in sunshine compared to earlier months. With only a 28% chance of sun, August stands out as one of the cloudier months of the year. This trend is particularly evident when juxtaposed with the sunnier days of spring, where March boasts a robust 72% chance of sunshine. Following the peak months of early spring, the probabilities dip in the summer, suggesting a shift towards more overcast conditions. As the summer progresses into August, residents and visitors alike may want to prepare for a mix of clouds and sporadic sun, making it a unique time in this beautiful coastal destination.
In Key West, United States, August marks a subtle transition as daylight hours begin to taper off, averaging 12 hours per day. Following the peak of June and July, which boast an abundant 13 hours of sunshine, August signals the start of a gradual decrease as the summer months yield to the cooler autumn season. This pattern reflects a yearly cycle where daylight duration starts at a modest 10 hours in January, then climbs to a peak in mid-summer before slowly receding again in the fall. As the days grow slightly shorter, Key West continues to bask in ample sunlight, making August a delightful month for outdoor activities and soaking up the last warm rays before autumn encroaches.
In August, Key West experiences an average wind speed of 5.6 m/s (13 mph), consistent with the breezier months earlier in the year. Following a gradual increase from the calm of July at 4.7 m/s (11 mph), August maintains a pleasant breeze that wraps around the island, ideal for outdoor activities and leisurely strolls along the waterfront. As the summer draws to a close, the winds begin to shift, with September witnessing a noticeable drop to 3.6 m/s (8 mph). This trend of fluctuating wind speeds highlights the transitional nature of late summer in Key West, as the island prepares for the more invigorating breezes of autumn. Overall, August strikes a perfect balance, offering warmth tempered by gentle winds that enhance the vibrant atmosphere of this tropical paradise.
The weather in Key West 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 West and find detailed weather information for every month.
August and January present quite different weather patterns. In August, temperatures are notably warmer, with average highs around 30°C (87°F) and humidity levels at 72%, creating a sweltering atmosphere. However, this month also sees considerable precipitation, averaging 100 mm (3.9 in) over approximately 15 rainy days. In contrast, January boasts milder temperatures, with an average of 22°C (71°F) and maximums reaching 26°C (79°F), alongside significantly less precipitation at only 27 mm (1.1 in) over 5 days. This cooler month has higher humidity at 81%, but it feels more comfortable than the summer heat. For more detailed insights, visit Key West weather in January.
When comparing the weather in August and February, notable differences emerge. August experiences warmer temperatures, with a minimum of 25°C (78°F) and an average of 29°C (84°F), while February offers a cooler climate, starting at a minimum of 14°C (58°F) and averaging 23°C (74°F). Precipitation is significantly higher in August, with 100 mm (3.9 in) occurring over 15 days, compared to February's much drier conditions of only 27 mm (1.1 in) over just 4 days. Additionally, August has a humidity level of 72%, which is slightly lower than February's 79%, contributing to a more oppressive feel during the summer month. For more details on February weather, check this link: Key West weather in February.
When comparing the weather in August and March, it's evident that August is significantly warmer and wetter. In August, temperatures range from a minimum of 25°C (78°F) to a maximum of 30°C (87°F), with an average temperature of 29°C (84°F), while March sees milder temperatures, with a minimum of 17°C (62°F), an average of 23°C (74°F), and a maximum of 26°C (80°F). Additionally, August experiences considerably more rainfall, totaling 100 mm (3.9 in) over about 15 days, compared to March's much drier conditions with only 18 mm (0.7 in) over about 4 days. Interestingly, humidity levels are relatively similar, with March at 76% and August at 72%. For more details on March weather specifically, you can visit Key West weather in March.
In comparing the weather of August and April, August tends to be hotter and more humid, with average temperatures around 29°C (84°F) and maximums reaching up to 30°C (87°F). In contrast, April is milder, with average temperatures of 25°C (77°F) and maximums capping at 29°C (84°F). While both months experience similar humidity levels—72% in August and 73% in April—August sees significantly more rainfall, with 100 mm (3.9 in) of precipitation spread over 15 days, compared to April's 40 mm (1.6 in) over just 7 days. For more detailed information, you can check Key West weather in April.
In comparing the weather between August and May, it’s clear that August is slightly warmer, with average temperatures reaching 29°C (84°F) and maximum temperatures hitting 30°C (87°F). In contrast, May has a lower average temperature of 26°C (79°F) and a maximum of 29°C (84°F). Both months experience considerable humidity, with August at 72% and May at 71%. However, May tends to have more precipitation, totaling 139 mm (5.5 in) over 11 days, compared to August's 100 mm (3.9 in) over 15 days. For more detailed information about May weather, you can visit Key West weather in May.
When comparing the weather in August and June, we notice that both months feature similar maximum temperatures, peaking at around 30°C (87°F). However, August tends to be slightly warmer overall, with an average temperature of 29°C (84°F) compared to June's 28°C (82°F). Additionally, August experiences more rainfall, with about 100 mm (3.9 in) over 15 days, while June has 94 mm (3.7 in) over 14 days. Humidity levels are also slightly higher in August at 72%, compared to June's 69%. For a more detailed look at the conditions during June, visit Key West weather in June.
In comparing the weather of August to July, both months exhibit similar temperature ranges, with August experiencing a slight increase in average temperature to 29°C (84°F) compared to July's 28°C (83°F). Both months maintain the same maximum temperature of 30°C (87°F). However, August tends to be slightly wetter, with 100 mm (3.9 in) of precipitation over 15 days, just a touch less than July's 103 mm (4.0 in) over the same number of days. Additionally, humidity levels are a bit higher in August at 72% compared to July's 70%. For more detailed insights into July’s weather, you can refer to Key West weather in July.
August and September in Key West exhibit a similar temperature range, with August showing a minimum temperature of 25°C (78°F) and an average of 29°C (84°F), and September maintaining a minimum of 25°C (77°F) and a slightly lower average of 28°C (83°F). Both months swing to a maximum of around 30°C (87°F), creating consistently warm conditions. However, September experiences significantly higher precipitation, totaling 172 mm (6.8 in) over 17 days, compared to August's 100 mm (3.9 in) over 15 days. Additionally, humidity levels increase slightly from 72% in August to 76% in September, contributing to a more humid feel. For more detailed insights, check out Key West weather in September.
In August, the weather tends to be warmer, with average temperatures around 29°C (84°F) and a maximum of 30°C (87°F). The month experiences significant rainfall, with approximately 100 mm (3.9 in) spread across 15 days and an average humidity of 72%. In contrast, October sees slightly cooler temperatures, with a minimum of 20°C (69°F) and an average of 27°C (81°F), while still reaching a high of 29°C (85°F). Rainfall increases to about 133 mm (5.2 in) over 18 days, contributing to a higher humidity level of 79%. For more detailed information, you can check out Key West weather in October.
In August, the weather tends to be significantly warmer with minimum temperatures around 25°C (78°F) and average highs reaching 30°C (87°F). This month also sees a fair amount of precipitation, averaging 100 mm (3.9 in) over 15 days, coupled with a humidity level of 72%. In contrast, November offers a more moderate climate, with minimum temperatures dropping to 18°C (65°F) and average highs around 28°C (83°F). Rainfall decreases to 83 mm (3.3 in) over 10 days, while humidity rises slightly to 80%. For a closer look at what to expect, you can check out Key West weather in November.
In August, temperatures in Key West are notably warmer, with average highs reaching 30°C (87°F) and a humid atmosphere at 72%. The month also sees significant rainfall, with about 100 mm (3.9 in) of precipitation spread over 15 days. In contrast, December offers a much cooler climate, featuring an average temperature of 23°C (74°F) and maximums around 27°C (80°F). This month experiences less rainfall, totaling 44 mm (1.7 in) over just 5 days, while humidity rises slightly to 81%. For a deeper look into Key West's December weather, check out Key West weather in December.
August in Key West brings warm temperatures with a notable blend of humidity and occasional rainfall. While the highs hover around a cozy 30°C (87°F), the evenings offer a comforting dip to the mid-20s. This month stands out with an increased chance of precipitation, as 15 days experience some rain, contributing to a total of 100 mm throughout the month. The humidity level often makes it feel warmer, enhancing that quintessential tropical experience. Compared to other months, August can be a bit wetter and stickier, perfect for those who thrive in the heat. For more details on the climate, explore Key West Climate.