Last updated: August 31, 2025
Experience the vibrant May weather in San Germán, Puerto Rico, where the temperature ranges from a warm 23°C (73°F) to a balmy 30°C (86°F). The month boasts an average of 26°C (79°F), making it ideal for outdoor activities amidst the lush landscapes. However, be prepared for some rain, as the area typically receives about 59 mm (2.3 in) of precipitation over 12 days, contributing to the rich greenery. With a humidity level of 76%, the air feels refreshing yet comfortably tropical, perfect for savoring the essence of this beautiful coastal town.
In San Germán, Puerto Rico, the month of May marks a transition into the warmer summer months, with temperatures reflecting the island’s tropical climate. The minimum temperature rises to a comfortable 23°C (73°F), while the average temperature creeps up to 26°C (79°F), providing a delightful warmth for both residents and visitors. At its peak, temperatures can reach a steamy 30°C (86°F). This trend signifies a subtle increase from April's averages, with May's warmth promising longer days filled with sunshine. As the month progresses, you can expect a pleasant blend of warmth and gentle breezes, making it an ideal time for outdoor activities and exploration in this picturesque part of the Caribbean.
In May, San Germán experiences a noticeable uptick in precipitation, receiving 59 mm (2.3 in) of rain over 12 days—a slight increase from the previous months, which range between 18 mm and 49 mm. This trend marks May as a pivotal time in the transition from the dry to the wet season, as rainfall begins to accumulate, leading into the summer months. As the year progresses, San Germán witnesses a significant surge in precipitation, especially in the later summer months, suggesting that May serves as an important precursor to the region's wetter climate. This gradual increase not only enriches the local ecosystems but also prepares the landscape for the more intense downpours that follow in the coming months.
May in San Germán, Puerto Rico, showcases a consistent humidity level of 76%, mirroring the conditions of both January and April. This stability indicates a gradual transition towards the more humid summer months, which see levels rising to 78% in June and even higher throughout the summer. Interestingly, the relative humidity remains relatively steady overall, hovering around the mid- to high 70s, before climbing to the peak levels of 81% in July. This trend highlights May as a pivotal month in the seasonal shift, where visitors can enjoy the lush, verdant landscape before the summer heat intensifies.
As May rolls into San German, Puerto Rico, the UV Index reaches a peak of 14, marking the highest level of intensity for the year. This extreme rating means that sun exposure can lead to skin burns in as little as 10 minutes, urging residents and visitors to take necessary precautions to protect their skin. Following a trend from the previous months, May continues the pattern of high to extreme UV levels that begin in January and persist through June, indicating a critical window for sun safety. With the UV Index remaining consistently high, it's vital to stay informed and prepared during this sunny month. For more details, visit San German UV Index.
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In May, the sun truly shines in San Germán, Puerto Rico, offering an impressive 363 hours of glorious daylight, marking the peak of the spring season. This month stands out as a beacon of brightness compared to the 262 hours seen in January, showcasing a remarkable increase in sunshine that heralds the transition to summer. The trend throughout the year reveals a steady climb in sunshine hours as we move from January to May, with March and April also enjoying notable increases. Even as the summer months approach, sunshine hours maintain a healthy count, hovering around the 360-hour mark in both July and June. However, a gradual decline begins in the fall, emphasizing the exceptional warmth and vibrancy that May brings, making it a perfect time to experience the rich beauty of San Germán.
In May, San German, Puerto Rico, experiences a 57% chance of sunny weather, marking a slight increase from the preceding month of April, which had a 49% likelihood. This uptick aligns with the overall trend of shifting toward sunnier conditions as the year progresses, especially when compared to the lower probabilities seen in the summer months of June and July. The data suggest that while May is favorable for sunshine, it's important to keep an eye on the weather as the year transitions into the hotter season, where clear skies become less certain. Overall, May offers a pleasant opportunity for outdoor activities amidst a backdrop of moderate sunshine.
In San Germán, Puerto Rico, the daylight duration begins its gradual rise in March, blooming into 12 hours by April and May, which are characterized by long, sun-filled days perfect for outdoor activities. As spring transitions into summer, daylight peaks at 13 hours in June and July, offering the most radiant and vibrant backdrop for local festivities and explorations. By August, the daylight hours slightly wane to 12 hours, continuing this trend into September. As the year progresses towards the cooler months, daylight gradually decreases back to 11 hours from October through February, creating a soothing rhythm of light that marks the ebb and flow of the seasons in this enchanting locale.
In San Germán, Puerto Rico, the winds of May usher in a mild increase in breeze, averaging 4.4 m/s (10 mph), a pleasantly gentle shift from the calmer months of January to April. The winds start to gain momentum, reflecting the transition into summer, with trends indicating a gradual rise as the year progresses. June continues this upward trajectory with 4.8 m/s (11 mph), peaking in July at 5.1 m/s (12 mph). This seasonal pattern not only enhances the charm of San Germán but also sets the stage for a balmy, refreshing atmosphere as locals and visitors alike embrace the outdoors, making the city’s historical sites all the more inviting. As the winds soften towards autumn in September, they embody the island’s dynamic climate, enriching its natural allure throughout the year.
Weather in San German varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in San German, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather conditions of May and January, May tends to be warmer with average temperatures ranging from a minimum of 23°C (73°F) to a maximum of 30°C (86°F), while January experiences slightly cooler average temperatures, with a minimum of 19°C (67°F) and a maximum of 29°C (84°F). Additionally, May sees more precipitation, averaging 59 mm (2.3 in) over 12 rainy days, compared to January's 18 mm (0.7 in) spread over just 4 days. Despite these differences, humidity levels remain consistent at 76% in both months. For more detailed insights into January's weather, you can visit San German weather in January.
When comparing the weather in May and February, May typically experiences slightly warmer temperatures, ranging from a minimum of 23°C (73°F) to a maximum of 30°C (86°F), with an average of 26°C (79°F). In contrast, February's temperatures range from a minimum of 21°C (70°F) to a maximum of 29°C (85°F), with an average of 25°C (77°F). While February is generally drier, receiving only 26 mm (1.0 in) of precipitation over about 5 days, May sees increased rainfall, totaling 59 mm (2.3 in) spread over approximately 12 days. Humidity levels are quite similar in both months, with May at 76% and February at 75%. For more detailed information on February weather, check out San German weather in February.
In comparing the weather between March and May, one can observe that May tends to be slightly warmer, with temperatures ranging from a minimum of 23°C (73°F) to a maximum of 30°C (86°F), while March records temperatures from a minimum of 21°C (69°F) to a maximum of 28°C (83°F). Additionally, May experiences higher average temperatures at 26°C (79°F) compared to March's average of 24°C (76°F). Precipitation in May is also a bit greater, totaling 59 mm (2.3 in) over 12 days, while March sees 49 mm (1.9 in) over 11 days. Humidity levels remain comparable, with May at 76% and March slightly lower at 75%. For more detailed insights into March weather, check out San German weather in March.
In comparing the weather of April and May, it's evident that May tends to be slightly warmer, with average temperatures reaching 26°C (79°F) compared to April's 25°C (77°F). The maximum temperatures also rise, peaking at 30°C (86°F) in May, while April's maximum is 29°C (84°F). Despite the warmth, May sees more precipitation, with 59 mm (2.3 inches) over 12 days, compared to April's 49 mm (1.9 inches) across 14 days. Both months maintain a consistent humidity level of 76%, creating a warm and tropical atmosphere throughout. For more detailed information, you can check San German weather in April.
In May, the weather typically features a minimum temperature of 23°C (73°F), an average of 26°C (79°F), and a maximum of 30°C (86°F), accompanied by 59 mm (2.3 in) of precipitation spread over 12 days and a humidity level of 76%. As June arrives, the temperatures see a slight increase, with a minimum of 23°C (75°F), an average of 27°C (80°F), and a maximum reaching 31°C (88°F). Precipitation in June decreases slightly to 53 mm (2.1 in), while the number of rainy days remains the same at 12. Humidity also rises marginally to 78%. For a more detailed look at how June weather unfolds in San German, you can visit San German weather in June.
In comparison to May, July experiences slightly warmer temperatures, with average highs reaching 31°C (88°F) compared to May's 30°C (86°F). Both months share similar minimum temperatures, but July's average is higher at 27°C (81°F) versus May's 26°C (79°F). Additionally, July sees increased precipitation, totaling 86 mm (3.4 in) over 16 days, compared to May's 59 mm (2.3 in) over 12 days, contributing to a higher humidity level of 81% in July, up from 76% in May. For more detailed information, check out San German weather in July.
In comparing the weather in May and August, both months share similar minimum temperatures, with May at 23°C (73°F) and August slightly higher at 23°C (74°F). However, August typically experiences a higher average temperature of 27°C (81°F) compared to May's 26°C (79°F), with a maximum temperature reaching 32°C (90°F) in August versus 30°C (86°F) in May. Precipitation is also more frequent in August, totaling 96 mm (3.8 in) over 16 days, whereas May sees 59 mm (2.3 in) over 12 days. Additionally, humidity levels rise in August to 80%, compared to 76% in May, making the latter part of summer feel a bit more oppressive. For more detailed information, you can visit San German weather in August.
May and September exhibit warm temperatures, but September tends to be slightly hotter and wetter. In May, the temperatures range from a minimum of 23°C (73°F) to a maximum of 30°C (86°F), with an average around 26°C (79°F) and experiencing about 59 mm (2.3 in) of precipitation over 12 days. In contrast, September has a minimum temperature of 24°C (76°F) and can reach up to 32°C (90°F) with an average of 27°C (81°F). However, it is significantly rainier, with approximately 159 mm (6.2 in) of precipitation spread over 21 days. Humidity levels are slightly higher in September at 79%, compared to May’s 76%. For more details on September weather, check out San German weather in September.
In comparing the weather between May and October, we see a slight increase in temperature, with October averaging around 27°C (80°F) compared to May's 26°C (79°F). Both months experience warm nights, but October's minimum temperature is a bit higher at 24°C (75°F). However, October is notably wetter, receiving 102 mm (4.0 in) of precipitation across 20 days, while May sees 59 mm (2.3 in) over 12 days. Humidity levels are similar in both months, hovering around 76-78%. For more detailed insights, check out San German weather in October.
May and November showcase similar temperatures in San German, with minimums around 23°C (73°F) and averages hovering near 26°C (79°F). However, November tends to be slightly warmer, occasionally reaching a maximum of 31°C (88°F) compared to May's 30°C (86°F). Precipitation also varies between these months; May sees about 59 mm (2.3 in) over 12 days, while November has a higher total of 91 mm (3.6 in) spread across 15 days. Humidity levels remain relatively close, with May at 76% and November slightly higher at 78%. For a more detailed look at the weather in November, visit San German weather in November.
When comparing the weather in May and December, we see some notable similarities and differences. Both months feature an average temperature of around 26°C (78°F) and maximum temperatures reaching up to 30°C (86°F). However, May tends to be slightly wetter, with 59 mm (2.3 in) of precipitation spread over 12 days, compared to December's 25 mm (1.0 in) of rain over just 7 days. Humidity levels remain consistent between the two months, with May at 76% and December slightly higher at 77%. For a detailed look at December weather specifics, you can visit San German weather in December.
As May unfolds in San Germán, the warmth of spring becomes increasingly evident, with temperatures reaching maximums of 30°C and an average of 26°C. This month stands out with its relatively high humidity at 76%, which can make the air feel quite muggy. While rain is not uncommon, with 12 rainy days contributing 59 mm of precipitation, it’s balanced by the sunny stretches that define this vibrant season. Compared to other months, May offers a delightful preview of summer's heat, making it a unique transition time. For more insights, check out San German Climate.