Last updated: August 31, 2025
March weather in Guaynabo, Puerto Rico is characterized by warm temperatures and notable humidity. With maximum temperatures reaching 29°C (85°F) and an average of 24°C (76°F), visitors can expect pleasant conditions, though nights can cool down to a minimum of 20°C (69°F). This month sees approximately 80 mm (3.2 inches) of rain over 21 days, making it one of the wetter months. Humidity levels hover around 74%, adding a tropical feel to the air. Overall, March offers a vibrant mix of warmth and moisture, perfect for experiencing the lush beauty of this Caribbean gem.
In March, Guaynabo, Puerto Rico, experiences a delightful blend of warmth and comfort as temperatures start to rise. The month opens with a minimum of 20°C (69°F) and peaks at a toasty 29°C (85°F), maintaining a steady average of 24°C (76°F). This slight elevation in temperature from February hints at the transition toward the warmer months ahead, while still retaining the mildness that characterizes early spring. With temperatures now consistently hovering around the mid-20s, March offers an inviting climate perfect for outdoor adventures and soaking up the sunny Caribbean vibes. As the days grow longer, the warmth encourages a vibrant atmosphere, setting the perfect stage for enjoying all that Guaynabo has to offer.
In March, Guaynabo, Puerto Rico, experiences a notable uptick in precipitation, with 80 mm (3.2 in) of rainfall spread across 21 days. This marks a significant increase from the previous months, reflecting the transition into the wetter spring season. The rainfall is essential for the region, contributing to the lush greenery that characterizes this vibrant area. As the month progresses, not only does the quantity of rain rise, but the frequency also paves the way for a series of showery days that nourish the landscape. This pattern sets the stage for even more substantial precipitation in the upcoming months, creating an invigorating atmosphere as nature awakens.
In March, Guaynabo, Puerto Rico experiences a modest humidity level of 74%, marking a slight decrease from the previous months. This trend reflects a gradual shift as the region transitions from the cooler winter months into the lush warmth of spring. As the humidity levels rise again in April and May, stabilizing at 75%, it sets the stage for the more humid summer months ahead, with July and August seeing levels peak at 80%. This fluctuation emphasizes the island's tropical climate, where relatively high humidity persists throughout the year, peaking in the summer while maintaining a comfortable range during spring.
In March, Guaynabo, Puerto Rico experiences a significantly high UV Index of 13, categorized as extreme, with a burn time of just 10 minutes. This marks an increase from February's already intense UV level of 11, highlighting a trend of escalating sun intensity as spring approaches. Following this pattern, the UV Index remains steady at 13 through April, and August, creating a consistent need for sun protection during these months. As we transition from winter into spring, it’s crucial to stay vigilant against sun exposure in Guaynabo, as this period indicates one of the highest risks for sunburn. For more information on sun safety, check the full details at Guaynabo UV Index.
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March shines brightly in Guaynabo, Puerto Rico, where residents enjoy an impressive 346 hours of sunshine, marking a vibrant kickoff to spring. This delightful month not only maintains the sunshine levels of April but also showcases a notable increase from January's 257 hours. As winter fades, the warmth and brilliance of March light the way toward the sunniest months to come. With May peeking around the corner, boasting an even brighter 356 hours, it’s a reminder that the island continues to bask in prolonged periods of sunlight, enhancing the charm and allure of Guaynabo's tropical paradise.
In Guaynabo, Puerto Rico, the likelihood of sunny weather in March stands at a promising 60%, reflecting a favorable shift from the cooler months of winter. Following a sunny February with a robust 65%, March maintains a solid chance of sunshine, although it slightly dips as the transition into spring unfolds. Compared to April, which sees a decrease to 43%, March provides a delightful respite from the rainier months ahead. This trend highlights March as a sweet spot for those seeking clear skies and pleasant weather, making it a prime time for outdoor activities before the summer humidity kicks in. Enjoy the sunshine while it’s here!
In March, Guaynabo, Puerto Rico, enjoys a delightful increase in daylight, basking in 12 hours of sunlight—a notable shift from the 11 hours seen in January and February. This heralds the transition into spring, where daylight hours continue to flourish, maintaining the 12-hour mark into April and May. The trend reflects a gradual lengthening of daylight that peaks in the summer months of June and July with 13 hours of bright sunshine. As the year progresses, daylight begins to recede again, signaling a return to the shorter intervals typical of late fall and winter, but March serves as a vibrant turning point, inviting residents and visitors alike to enjoy the longer days ahead.
As March unfolds in Guaynabo, Puerto Rico, the average wind speed reaches a gentle 3.4 m/s (8 mph), offering a pleasant balance between the breezy months of winter and the warmer spring air ahead. Following February's mild uptick to 4.0 m/s (9 mph), March marks a slight dip but remains comparatively robust, showcasing a pattern of dynamic shifting winds. This mellowness hints at the transition towards the more volatile winds of summer, which peak in July at 4.0 m/s. As we journey through March, the lingering winds are a refreshing reminder of the island's vibrant climate, bridging the gap between the cooler months and the heat of the tropics.
Weather in Guaynabo varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in Guaynabo, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between March and January, both months exhibit similar temperature ranges, with March experiencing slightly higher minimum temperatures at 20°C (69°F) compared to January's 19°C (66°F). Average temperatures remain constant at 24°C (76°F) for both months, with maximum temperatures peaking at 29°C (85°F) in March and 29°C (84°F) in January. However, March is notably wetter, receiving 80 mm (3.2 in) of precipitation over 21 days, while January has only 48 mm (1.9 in) over 16 days. Humidity levels are also quite comparable, with March at 74% and January at 76%. For more detailed insights, you can check Guaynabo weather in January.
In March, the weather remains quite warm, with temperatures ranging from a minimum of 20°C (69°F) to a maximum of 29°C (85°F) and an average of 24°C (76°F). This month sees higher precipitation levels, totaling 80 mm (3.2 in) over 21 days, resulting in a humidity of 74%. In contrast, February offers slightly cooler conditions, as temperatures range from 20°C (69°F) to a maximum of 28°C (83°F), with similar averages. Precipitation in February is less, at 53 mm (2.1 in), and occurs over 18 days, with a humidity of 75%. For more detailed insights, check out Guaynabo weather in February.
March and April exhibit similar warm and humid weather patterns, though April tends to be slightly warmer. In March, temperatures range from a minimum of 20°C (69°F) to a maximum of 29°C (85°F), with an average temperature of 24°C (76°F). The month sees about 80 mm (3.2 in) of precipitation over 21 days, contributing to a humidity level of 74%. In contrast, April's temperatures shift upwards, with a minimum of 21°C (70°F) and a maximum of 30°C (86°F), and an average of 25°C (77°F). April experiences a bit less rainfall at 77 mm (3.0 in) across 20 days, resulting in a similar humidity level of 75%. For more detailed insights into April's weather, you can visit Guaynabo weather in April.
In comparing the weather between March and May, we see a noticeable increase in temperature and precipitation. March typically experiences minimum temperatures around 20°C (69°F) and averages around 24°C (76°F), with a maximum of 29°C (85°F). In contrast, May boasts slightly warmer conditions, with minimums at 22°C (72°F) and averages of 26°C (79°F), reaching up to 31°C (87°F). Additionally, May tends to have more rainfall, accumulating 98 mm (3.9 in) over 24 days, compared to March's 80 mm (3.2 in) over 21 days. Humidity levels remain similar, with March at 74% and May slightly higher at 75%. For a more detailed look at May weather, check out Guaynabo weather in May.
In comparing the weather of March and June, we see a notable increase in temperatures. March experiences a minimum temperature of 20°C (69°F) and an average of 24°C (76°F), while June offers slightly warmer conditions with a minimum of 23°C (74°F) and an average of 27°C (80°F). The maximum temperature also rises in June, reaching 31°C (88°F) compared to March's maximum of 29°C (85°F). Precipitation levels are also higher in June, with 99 mm (3.9 in) over 23 days, compared to March's 80 mm (3.2 in) over 21 days. Additionally, humidity remains high in both months, with March at 74% and June slightly rising to 77%. For more detailed information, you can check Guaynabo weather in June.
In March, the weather tends to be warmer with temperatures ranging from a minimum of 20°C (69°F) to a maximum of 29°C (85°F), averaging at around 24°C (76°F). It experiences a moderate amount of rainfall, with 80 mm (3.2 in) of precipitation over 21 days and a humidity level of 74%.
In contrast, July is noticeably warmer, with minimum temperatures of 23°C (74°F) and maximums reaching 31°C (88°F), averaging 27°C (81°F). The month also sees increased rainfall, accumulating to 124 mm (4.9 in) across 24 days and bringing higher humidity levels of 80%. This shift in weather reflects the transition to summer conditions, making July distinctly warmer and wetter compared to March. For a detailed overview of July weather in Guaynabo, visit Guaynabo weather in July.
In March, temperatures in Guaynabo range from a minimum of 20°C (69°F) to a maximum of 29°C (85°F), with an average of 24°C (76°F). This month experiences a fair amount of rain, with 80 mm (3.2 in) of precipitation over approximately 21 days, and humidity levels averaging 74%. In contrast, August brings warmer temperatures, with a minimum of 23°C (74°F) and a maximum of 31°C (89°F), averaging around 27°C (81°F). The precipitation also increases significantly to 130 mm (5.1 in), spread over 25 days, and humidity levels rise slightly to 80%. For more details on weather patterns, check out Guaynabo weather in August.
In comparing the weather between March and September, March experiences milder temperatures with a minimum of 20°C (69°F) and an average of 24°C (76°F), reaching a maximum of 29°C (85°F). In contrast, September tends to be warmer, with minimum temperatures starting at 23°C (74°F) and an average of 27°C (81°F), peaking at 32°C (90°F). Additionally, March sees around 80 mm (3.2 in) of precipitation over 21 days, while September is significantly wetter, receiving 200 mm (7.9 in) of rain over 27 days. Humidity levels are also slightly higher in September at 79%, compared to March's 74%. For more specific insights on September weather, you can view Guaynabo weather in September.
March and October both experience warm temperatures, but October tends to be slightly hotter, with an average of 27°C (80°F) compared to March's average of 24°C (76°F). During October, temperatures can reach a high of 31°C (88°F), while March peaks at 29°C (85°F). However, October also brings significantly more rainfall, with 183 mm (7.2 in) of precipitation over 27 days, compared to March's 80 mm (3.2 in) spread over 21 days. Humidity levels are relatively similar, with March at 74% and October slightly higher at 78%. For more detailed information, check out Guaynabo weather in October.
In comparing the weather conditions in March and November, March tends to have slightly lower temperatures, ranging from a minimum of 20°C (69°F) to a maximum of 29°C (85°F), with an average temperature of 24°C (76°F). The month sees approximately 80 mm (3.2 in) of precipitation over 21 days, accompanied by a humidity level of 74%. In contrast, November experiences a warmer climate, with temperatures ranging from a minimum of 22°C (72°F) to a maximum of 30°C (86°F) and an average temperature of 26°C (79°F). November also has increased precipitation, totaling around 120 mm (4.7 in) over 23 days, with humidity slightly higher at 78%. For more details on the weather conditions during this month, check out Guaynabo weather in November.
March and December both feature warm temperatures, but March experiences slightly lower averages, with a minimum of 20°C (69°F) and an average of 24°C (76°F), compared to December's minimum of 21°C (71°F) and average of 25°C (77°F). December also sees higher maximum temperatures, reaching up to 30°C (86°F), while March peaks at 29°C (85°F). Precipitation levels differ slightly, with March receiving 80 mm (3.2 in) over 21 days and December having 66 mm (2.6 in) across 22 days. Humidity remains fairly consistent, measuring 74% in March and 76% in December, making both months feel quite tropical. For more details, you can check Guaynabo weather in December.
As March rolls in, Guaynabo experiences a delightful mix of warmth and humidity, with temperatures hovering comfortably between 20°C and 29°C. This month is characterized by an increase in precipitation, with rain gracing the area on roughly 21 days, contributing to a vibrant and lush landscape. The average humidity of 74% adds a tropical flair that distinguishes March from both the drier winter months and the more sultry summer ahead. Overall, March serves as a beautiful transition, embodying the charm of spring in Puerto Rico. For more details on what to expect year-round, visit Guaynabo Climate.