May Weather in Siesta Key, United States

Last updated: February 24, 2025

Experience the vibrant May weather of Siesta Key, United States, where the days are characterized by a maximum temperature reaching 32°C (90°F) and a pleasant average of 25°C (78°F). As you bask in the sun, be prepared for occasional rain, with 109 mm (4.3 in) of precipitation spread across 12 days, contributing to the lush beauty of the island. The humidity levels at 76% create a warm, tropical atmosphere, perfect for relaxing on the famous beaches or exploring local attractions. Whether you're looking to unwind or embark on adventures, May in Siesta Key promises a delightful blend of sunshine and refreshing showers.

May Temperature in Siesta Key

May marks a delightful transition into warmer weather in Siesta Key, United States. With minimum temperatures rising to 17°C (62°F) and averages hitting 25°C (78°F), it's a time when the days become increasingly inviting. Maximum temperatures peak at 32°C (90°F), making it ideal for beach activities and outdoor adventures. This month signifies a clear upward trend in warmth, as temperatures steadily climb from the cooler early months of the year. As spring gives way to the sultry summer heat, May stands out for its inviting climate, perfect for exploring the sun-kissed shores and vibrant local culture.

May Weather in Siesta Key: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Siesta Key, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec636769747881828282797166
Data source: Temperature data for Siesta Key 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.

May Precipitation in Siesta Key

In May, Siesta Key experiences a noticeable shift in precipitation, with a total of 109 mm (4.3 in) falling over 12 days, doubling the rainfall from April's 52 mm (2.0 in). This surge marks the transition into a wetter season, foreshadowing even rainier months ahead in June and July. The increase in rainy days signals the onset of summer storms, creating a lush environment that's perfect for beachgoers and nature enthusiasts alike. As the weather warms, the vibrant atmosphere of Siesta Key is complemented by the refreshing energy brought by these May showers, setting the stage for the tropical climate that defines this beautiful coastal area.

May Precipitation Trends in Siesta Key

The chart displays monthly precipitation patterns in Siesta Key, with values for each month alongside May's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec36412352109185196213171674260
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Siesta Key

As May arrives in Siesta Key, the humidity begins to show a gradual decline, settling at 76%. This marks a notable shift from the peak of 82% in January and February, reflecting the transition into the warmer months. The downward trend continues into June and July, where humidity levels dip even further to 75% and 74% respectively. This slight decrease creates a more comfortable atmosphere, making May an ideal time for outdoor activities before the summer heat fully sets in. Interestingly, as the year progresses toward autumn, humidity levels rise again in September, indicating a cyclical pattern influenced by seasonal changes in this beautiful coastal region.

May Average Humidity in Siesta Key

This chart illustrates the average monthly humidity levels in Siesta Key, with May's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how May's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec82%82%79%78%76%75%74%75%78%80%82%84%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Siesta Key

As May approaches in Siesta Key, the UV Index skyrockets to 12, reaching an extreme exposure level that demands attention. With a burn time of just 10 minutes, the sun's intensity can catch even the most cautious beachgoers off guard. This pattern of increasing UV levels is consistent, as we see a steady rise from January’s 6 to February’s 8, and into the spring months where it peaks in April and May. Following May, the UV Index remains at this extreme level for several months, highlighting the importance of proactive sun safety measures during these sunny days. As summer sets in, the need for sunscreen, protective clothing, and shade becomes paramount. For detailed insights into daily UV levels, check out Siesta Key UV Index.

Maximum UV Index Levels in Siesta Key for May

The chart shows the monthly maximum UV Index (UVI) for Siesta Key in May, 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.
JanFebMarAprMayJunJulAugSepOctNovDec6810111212121111975
Data source: Siesta Key May 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.

May Sunshine in Siesta Key

May in Siesta Key is a sun-soaked delight, with an impressive 333 hours of sunshine gracing the skies. Transitioning from spring into summer, this month shines brighter than the preceding April's 323 hours, illustrating a steady increase in daylight. As the year progresses, Siesta Key continues to bask in abundance, providing a perfect backdrop for outdoor adventures and relaxation. The trend presents a remarkable pattern, with sunshine reaching its zenith in May, setting the stage for the bustling summer months ahead. Embrace this golden opportunity to explore the stunning beaches and vibrant local scene, as Siesta Key excels in delivering a radiant start to summer!

Monthly Sunshine Duration in Siesta Key: May Highlighted

The May sunshine duration represents the total number of hours Siesta Key experiences direct sunlight during the month of May, excluding cloudy or obstructed periods. This chart compares the sunshine duration of May with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec221h273h326h323h333h304h328h324h314h302h280h281h
Data source: Siesta Key May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Siesta Key During May

In Siesta Key, the likelihood of sunny weather in May is 58%, making it one of the more favorable months for sunshine though slightly lower than the peak of 64% in April. This transition into late spring sees a decline from April, but still offers significantly better chances than the summer months, which plummet to a mere 18% in June and 23% in July. May maintains a comfortable position, suggesting that while it might not reach the heights of April, it remains a delightful time to enjoy the outdoors before the sweltering heat of summer sets in. Overall, with nearly six out of ten days promising a sunny disposition, May stands as a charming bridge between spring's radiant days and the warm summer sun.

Percentage of Sunny Days in May in Siesta Key

The chart illustrates the percentage of sunny days in Siesta Key throughout the year, with May 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 Siesta Key experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec41%56%57%64%58%18%23%17%32%50%53%59%
Data source: Siesta Key May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Siesta Key in May

In Siesta Key, United States, the transition from winter's chill to summer's warmth is beautifully mirrored in the daylight duration throughout the year. Starting with approximately 10 hours of daylight in January, the days gradually lengthen, reaching 12 hours by March and maintaining that brightness through April. As May arrives, residents and visitors are greeted with 13 hours of glorious daylight, ushering in longer and sun-filled days that persist through summer until August. Following this peak, daylight begins to taper off, descending back to 12 hours in September, then gradually returning to 10 hours by December. This trend not only marks the changing seasons but also invites a vibrant outdoor lifestyle, especially during the sunniest months.

Average Daylight Hours in Siesta Key for May

The chart illustrates the variation in daylight duration in Siesta Key throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 37m11h 13m12h12h 49m13h 30m13h 49m13h 38m13h 3m12h 16m11h 28m10h 46m10h 25m
Data source: Siesta Key daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Siesta Key

In May, Siesta Key experiences a delightful average wind speed of 4.1 m/s (9 mph), maintaining a pleasant breeze that marks the transition into the summer months. This month stands out as consistent with the spring winds, slightly mellowing from April's 4.2 m/s. As the year progresses, the wind typically begins to calm down, with subsequent months like June and July seeing averages drop to 3.4 m/s and 3.0 m/s respectively. Thus, May serves as a perfect blend of refreshing winds before the summer heat settles in, making it an ideal time for outdoor activities, whether it’s beach outings or sailing adventures. Overall, the gentle breezes help create a relaxed atmosphere that complements Siesta Key's stunning beach vibes.

Average May Wind Speed in Siesta Key

The chart displays monthly wind speed patterns in Siesta Key, with values for each month shown alongside May's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how May's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.94.54.04.24.1 m/s3.43.03.32.73.53.93.0
Data source: Siesta Key May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Siesta Key Compares to Other Months

The weather in Siesta Key changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of May's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Siesta Key and find detailed weather information for every month.

May and January offer starkly contrasting weather experiences. In May, temperatures range from a pleasant 17°C (62°F) at night to a warm 32°C (90°F) during the day, with an average temperature of 25°C (78°F). The month sees a higher level of precipitation, totaling 109 mm (4.3 in) over approximately 12 days, and humidity remains relatively high at 76%. In contrast, January is much cooler, featuring a minimum temperature of 1°C (34°F) and a comfortable average of 17°C (63°F), peaking at 27°C (80°F). This month has significantly less rain, with only 36 mm (1.4 in) of precipitation occurring over about 4 days, though humidity is slightly higher at 82%. Overall, while May enjoys warm summer-like conditions, January presents a cooler, drier atmosphere. For more details on January's weather, visit Siesta Key weather in January.

When comparing the weather in May and February, notable differences emerge. In May, temperatures are warmer, with a minimum of 17°C (62°F) and an average of 25°C (78°F), peaking at 32°C (90°F). The month also experiences higher precipitation, totaling 109 mm (4.3 in) over about 12 days, alongside a humidity level of 76%. In contrast, February presents milder conditions, with a minimum temperature of 6°C (44°F), an average of 20°C (67°F), and a maximum of 28°C (82°F). February sees significantly less precipitation at 41 mm (1.6 in) over just 4 days, though humidity is slightly higher at 82%. For more details on February's weather, check out Siesta Key weather in February.

May and March showcase a notable contrast in weather patterns. In March, temperatures range from a cool minimum of 7°C (45°F) to a comfortable average of 21°C (69°F), peaking at 28°C (83°F). The month experiences relatively low precipitation at only 23 mm (0.9 in) over about 3 days, along with a humidity level of 79%. In contrast, May warms up significantly, with minimum temperatures around 17°C (62°F) and an average of 25°C (78°F), reaching highs of 32°C (90°F). However, it also brings increased precipitation, totaling 109 mm (4.3 in) over 12 days, and slightly lower humidity at 76%. For more specific details, check out Siesta Key weather in March.

When comparing the weather in May and April, it's evident that May experiences warmer temperatures, with minimums around 17°C (62°F) and an average of 25°C (78°F), compared to April's lower minimum of 11°C (52°F) and average of 23°C (74°F). The maximum temperatures in both months are quite similar, peaking at 32°C (90°F) in May and 30°C (86°F) in April. However, May sees a significant increase in precipitation, with 109 mm (4.3 in) over 12 days, whereas April has only 52 mm (2.0 in) across 7 days. Additionally, while humidity remains relatively high in both months, it is slightly lower in April at 78% compared to May's 76%. For more details on April weather, you can check out Siesta Key weather in April.

In comparing the weather between May and June, June typically presents warmer temperatures, with minimums rising from 17°C (62°F) in May to 23°C (73°F). The average temperature also increases slightly from 25°C (78°F) to 27°C (81°F), while the maximum temperature can reach up to 34°C (93°F) in June, compared to 32°C (90°F) in May. However, June experiences more precipitation, totaling 184 mm (7.3 in) over 22 days, up from 109 mm (4.3 in) over 12 days in May. Interestingly, the humidity remains relatively stable, with May at 76% and June at 75%. For more detailed insights, you can check Siesta Key weather in June.

May and July exhibit distinct weather patterns. In May, temperatures range from a minimum of 17°C (62°F) to a maximum of 32°C (90°F), with an average of 25°C (78°F). The month experiences 109 mm (4.3 in) of precipitation over 12 days, coupled with a humidity level of 76%. In contrast, July sees higher temperatures, with a minimum of 24°C (75°F), an average of 28°C (82°F), and a maximum of 33°C (91°F). Precipitation increases significantly to 196 mm (7.7 in) spread over 26 days, while humidity remains slightly lower at 74%. For more detailed insights into July’s weather patterns, check out Siesta Key weather in July.

May and August showcase distinct weather patterns, highlighting the transition from spring to summer. In May, temperatures range from a mild 17°C (62°F) at night to a warm 32°C (90°F) during the day, with an average of 25°C (78°F). The month experiences moderate rainfall, totaling 109 mm (4.3 in) over about 12 days, accompanied by a relatively high humidity level of 76%.

In contrast, August sees elevated temperatures, with minimums of 24°C (76°F) and maximums reaching 34°C (93°F), while the average is slightly higher at 28°C (83°F). The month is much wetter, with precipitation measuring 213 mm (8.4 in) across 26 days, resulting in a similar humidity level of 74%. For more detailed insights on weather trends, you can check out Siesta Key weather in August.

May and September both offer warm temperatures, but September tends to be slightly warmer overall. In May, the minimum temperature is 17°C (62°F) and the average hovers around 25°C (78°F), with a maximum of 32°C (90°F). In contrast, September starts with a minimum of 22°C (72°F) and an average temperature of 28°C (82°F), reaching up to 33°C (92°F). Rainfall is more abundant in September, with 171 mm (6.7 in) of precipitation across 20 days, compared to May’s 109 mm (4.3 in) over 12 days. Both months exhibit high humidity levels, 76% in May and slightly higher at 78% in September, contributing to a muggy atmosphere. For more detailed insights, explore the Siesta Key weather in September.

In comparing the weather between May and October, both months share a similar maximum temperature of 32°C (90°F), highlighting the warmth prevalent during this period. However, May typically experiences higher minimum and average temperatures, with lows of 17°C (62°F) and an average of 25°C (78°F), compared to October’s minimum of 12°C (54°F) and an average of 26°C (79°F). October also sees less precipitation, totaling 67 mm (2.7 in) over 10 days, while May records 109 mm (4.3 in) across 12 days. Interestingly, October's humidity is slightly higher at 79%, compared to May's 76%. For more insights, check out Siesta Key weather in October.

May and November offer contrasting weather experiences. In May, temperatures start at a mild 17°C (62°F) and can reach up to a warm 32°C (90°F), with an average of 25°C (78°F). The month is marked by higher humidity at 76% and more rainfall, totaling 109 mm (4.3 in) over about 12 days. In contrast, November features cooler temperatures, ranging from a minimum of 10°C (51°F) to a maximum of 30°C (85°F), with an average of 22°C (71°F). Precipitation is significantly lower, with only 42 mm (1.6 in) falling over just 5 days, and humidity is slightly higher at 82%. For a detailed look at the climate during this month, you can see more about Siesta Key weather in November.

May and December offer contrasting weather experiences. In May, temperatures are typically much warmer, with minimums of 17°C (62°F) and maximums reaching 32°C (90°F), coupled with an average of 25°C (78°F). This month also sees higher precipitation levels, averaging 109 mm (4.3 in) over 12 days, along with humidity around 76%. In contrast, December presents milder conditions, with temperatures ranging from a minimum of 6°C (44°F) to a maximum of 27°C (81°F) and an average of 19°C (67°F). Precipitation is lower, totaling 60 mm (2.4 in) over just 6 days, yet the humidity is slightly higher at 84%. For those interested in more details, you can check Siesta Key weather in December.

Compare Siesta Key's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Siesta Key

In May, Siesta Key begins to warm up, with temperatures rising and a noticeable increase in humidity, creating that signature tropical feel. While the average temperature climbs to a pleasant 25°C (78°F), the maximum can reach a sizzling 32°C (90°F), making it perfect for beach-goers. However, this month also sees more frequent rainfall, with about 12 days experiencing some precipitation, contributing to the total of 109 mm (4.3 in). This shift in weather patterns marks a transition into the summer season, distinct from the cooler and drier months preceding it. To learn more about what to expect throughout the year, check out Siesta Key Climate.