Last updated: August 31, 2025
Experience the tropical charm of Guaynabo, Puerto Rico in July, where temperatures soar to a maximum of 31°C (88°F) and settle at a comfortable average of 27°C (81°F). The warm days are accompanied by a minimum temperature of 23°C (74°F), creating inviting conditions for both relaxation and exploration. However, this enchanting month also brings significant rainfall, with a total precipitation of 124 mm (4.9 in) spread over approximately 24 days, contributing to the lush greenery characteristic of the region. With humidity levels averaging 80%, the air is rich and vibrant, making July an exhilarating time to experience the beauty of Guaynabo.
In Guaynabo, Puerto Rico, July welcomes warm and inviting temperatures, marking the peak of the summer season. With a minimum of 23°C (74°F) and heights reaching up to 31°C (88°F), the month brings a delightful warmth that remains consistent throughout the day. The average temperature hovers around 27°C (81°F), blending perfectly with the island’s vibrant atmosphere. This trend of pleasant heat is mirrored in the preceding months, showing a gradual rise from January's cooler averages. As July unfolds, the combination of steady highs and comfortable lows invites both locals and visitors to indulge in outdoor activities amidst the tropical charm of Guaynabo. 🌞
In July, Guaynabo, Puerto Rico, experiences a notable increase in rainfall, with total precipitation reaching 124 mm (4.9 in), making it one of the wettest months of the year. This surge aligns with a pattern observed throughout the summer months, as July records 24 rainy days, reflecting the region’s tropical climate and propensity for afternoon showers. Following June's near-equivalent rainfall, July’s precipitation begins to set the stage for even wetter conditions in August and September, culminating in September's peak average of 200 mm (7.9 in). The consistent rainfall during this period not only contributes to the lush landscapes but also presents challenges for outdoor activities, emphasizing the importance of understanding seasonal weather patterns in this vibrant locale.
In Guaynabo, Puerto Rico, July marks a noticeable peak in humidity, reaching 80%, aligning with the trend of rising moisture levels as the year progresses. Beginning at 76% in January, humidity gradually fluctuates but remains consistently high throughout the early months, peaking during the summer. Both July and August maintain this elevated 80% mark, contributing to the tropical atmosphere characteristic of the region during this time. As the year transitions into autumn, humidity slightly dips, settling at 79% in September and gradually decreasing to 76% by December. This ongoing pattern highlights the vibrant and humid nature of Guaynabo, making July a quintessential representation of its tropical climate.
In July, Guaynabo, Puerto Rico experiences an extreme UV Index of 12, with a burn time of just 10 minutes. This trend of high UV exposure is consistent with the summer months, where the UV Index remains formidable. From January's 9 to July's peak, there's a steady rise, peaking in May at 14. The surrounding months—June and August—also show similarly high indices, illustrating the persistent risk of sun exposure during this season. As summer approaches, it's crucial to stay vigilant about sun safety. For more detailed information, visit Guaynabo UV Index.
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In Guaynabo, Puerto Rico, July is a vibrant month for sunshine, boasting an impressive 353 hours of radiant light. Following the trend set in the sunny months of May and June, which recorded 356 and 343 hours respectively, July continues to bask in the joy of ample daylight. This summer warmth sets the stage for outdoor activities and local festivities, inviting residents and visitors alike to soak in the sun. As summer progresses, the slight dip in hours when compared to both May and June highlights a subtle shift towards the later months of the year, yet July still shines brightly, ensuring that sunshine lovers can relish more than enough golden hours.
As July rolls into Guaynabo, Puerto Rico, the likelihood of sunny weather dips to 38%, marking one of the lower sunshine probabilities for the year. This trend becomes particularly evident when juxtaposed with earlier months; for instance, February boasts a 65% chance of sun, while March holds steady at 60%. The crew of summer months reveals a gradual decline in sunny days, with June peaking at a mere 20%, likely indicating the onset of the rainy season. Although August and September offer similar forecasts, the persistent pattern of lower sunshine in July might encourage locals and visitors to prepare for a mix of sun and occasional showers during their summer escapades.
In Guaynabo, Puerto Rico, the daylight duration exhibits a delightful wave throughout the year. Beginning with a steady 11 hours in both January and February, the days gradually lengthen, peaking at 13 hours during the vibrant months of June and July. This increase reflects the shift towards summer, where the sun shines generously, offering ample time for outdoor adventures. As the seasons transition back toward autumn, daylight gently recedes to 12 hours in August and settles back to 11 hours by October, creating a rhythmic cycle that enhances the island's charm throughout the year.
In July, Guaynabo, Puerto Rico experiences a refreshing uptick in wind speed, averaging 4.0 m/s (9 mph), which aligns with the year's most active months. This increase forms part of a noticeable trend during the summer, where winds tend to pick up, providing a welcome breeze to combat the warmth. Following June's slightly lower average of 3.7 m/s (8 mph), July maintains this higher velocity before gradually settling down in August with average winds of 3.5 m/s (8 mph). The consistently mild yet invigorating winds throughout the early summer months add a dynamic touch to the tropical atmosphere, making July particularly enjoyable for outdoor activities and leisurely seaside escapades.
Weather in Guaynabo varies notably across the year, with each month offering distinct climate conditions. This page compares July’s weather to other months in Guaynabo, focusing on differences in temperature, rainfall, humidity, and UV levels.
The weather in July and January presents distinct contrasts. In July, temperatures range from a minimum of 23°C (74°F) to a maximum of 31°C (88°F), with an average of 27°C (81°F). This month experiences significant rainfall, totaling 124 mm (4.9 in) over 24 days, and humidity levels are high at 80%. In contrast, January sees milder temperatures, with a minimum of 19°C (66°F), an average of 24°C (76°F), and a maximum of 29°C (84°F). Precipitation is considerably lower in January, at 48 mm (1.9 in) over 16 days, and humidity is also slightly lower at 76%. For more detailed information, check out Guaynabo weather in January.
When comparing the weather in July and February, July tends to be warmer and more humid. In July, temperatures range from a minimum of 23°C (74°F) to a maximum of 31°C (88°F), with an average of 27°C (81°F). In contrast, February sees slightly cooler temperatures, with a minimum of 20°C (69°F) and a maximum of 28°C (83°F), averaging 24°C (75°F). Precipitation is also higher in July, with 124 mm (4.9 in) recorded over 24 days, compared to February's 53 mm (2.1 in) over 18 days. Additionally, July has a higher humidity level of 80% versus February's 75%. For more detailed insights, you can check Guaynabo weather in February.
In July, the weather tends to be hotter and more humid compared to March, with nighttime temperatures averaging around 23°C (74°F) and reaching highs of 31°C (88°F). The average temperature in March is slightly cooler, ranging from a minimum of 20°C (69°F) to a maximum of 29°C (85°F). Additionally, July experiences higher precipitation, with 124 mm (4.9 in) over approximately 24 days, while March sees 80 mm (3.2 in) spread over about 21 days. The humidity in July is also higher at 80%, compared to March's more comfortable 74%. For a closer look at the climate specifics, you can check Guaynabo weather in March.
In comparing the weather between July and April, April experiences slightly cooler temperatures, with an average of 25°C (77°F), compared to July's warmer average of 27°C (81°F). While both months have relatively high temperatures, July sees a higher maximum of 31°C (88°F) versus April's 30°C (86°F). Precipitation is more frequent in July, with 124 mm (4.9 in) over 24 days, compared to April's 77 mm (3.0 in) over 20 days. Additionally, humidity levels are higher in July at 80%, compared to April's 75%, making July feel more sultry overall. For more detailed information about April's climate, check out Guaynabo weather in April.
In comparing the weather conditions of July and May, both months exhibit similar temperature ranges, with May having a slightly lower average of 26°C (79°F) compared to July's 27°C (81°F). However, July experiences more precipitation, totaling 124 mm (4.9 in) over 24 days, while May sees 98 mm (3.9 in) on the same number of days. Humidity levels are also higher in July at 80%, compared to May's 75%. For a more detailed look at May's weather patterns, check out Guaynabo weather in May.
In comparing the weather of June and July, we find that both months share similar temperature ranges, with minimums of 23°C (74°F), averages of 27°C (81°F), and maximums of 31°C (88°F). However, July typically experiences higher precipitation, with 124 mm (4.9 in) over 24 days, compared to June's 99 mm (3.9 in) across 23 days. Additionally, July tends to be slightly more humid, with an average humidity of 80%, compared to June's 77%. For more specifics on June's weather, you can check Guaynabo weather in June.
In comparing the weather of July and August, both months exhibit similar temperature ranges, with minimums of 23°C (74°F), averages of 27°C (81°F), and maximums of 31°C (88°F in July and 89°F in August). However, August sees a slight increase in both precipitation and rainy days, with 130 mm (5.1 in) of rainfall over 25 days compared to July's 124 mm (4.9 in) over 24 days. Humidity remains consistent at around 80% for both months, contributing to a tropical feel prevalent during the summer. For more detailed information on weather patterns during this time, you can check Guaynabo weather in August.
July and September feature similar minimum and average temperatures, with both months starting at 23°C (74°F) and averaging 27°C (81°F). However, September typically sees a slightly higher maximum temperature of 32°C (90°F) compared to July's 31°C (88°F). In terms of precipitation, September is considerably wetter, receiving 200 mm (7.9 in) over 27 days, while July experiences 124 mm (4.9 in) with rain on 24 days. Despite the increased rainfall, September's humidity is marginally lower at 79%, compared to July's 80%. For more detailed insights, you can check Guaynabo weather in September.
In both July and October, temperatures in Guaynabo remain relatively consistent, with minimums around 23°C (74°F), averages of 27°C (81°F), and maximums reaching 31°C (88°F). However, October experiences increased precipitation, totaling 183 mm (7.2 in) over 27 days, compared to July's 124 mm (4.9 in) over 24 days. Humidity levels also taper slightly in October at 78%, down from July's 80%. For more detailed insights, you can check Guaynabo weather in October.
In comparing the weather between July and November, both months feature warm temperatures, but July tends to be slightly warmer overall. July's average temperature is 27°C (81°F) with a maximum of 31°C (88°F), while November sees an average of 26°C (79°F) and a maximum of 30°C (86°F). Both months experience significant precipitation, with July receiving 124 mm (4.9 in) over 24 days and November coming in just marginally lower with 120 mm (4.7 in) over 23 days. Humidity levels are also relatively high in both months, with July at 80% and November at 78%. For a more detailed look at the conditions in November, you can check Guaynabo weather in November.
In comparing the weather between July and December, we see distinct differences in temperature and precipitation. July typically features warmer temperatures, with a minimum of 23°C (74°F) and an average of 27°C (81°F), while December sees slightly cooler conditions with a minimum of 21°C (71°F) and an average of 25°C (77°F). Additionally, July experiences higher humidity at 80% and more rainfall, totaling 124 mm (4.9 in) across 24 days, compared to December's 66 mm (2.6 in) over 22 days and a slightly lower humidity of 76%. For a deeper look into December weather specifically, you can check out Guaynabo weather in December.
In July, Guaynabo experiences a distinct shift in weather patterns, characterized by warmer temperatures and increased humidity compared to other months. With average highs reaching a balmy 31°C and a notable 80% humidity, this month feels particularly sultry. It's also the peak of the rainy season, contributing to a significant amount of precipitation over 24 days, making it a stark contrast to the drier winter months. For those planning a visit, it's essential to prepare for tropical downpours while enjoying the vibrant warmth of summer. For a deeper dive into the overall weather trends, check out Guaynabo Climate.