Last updated: August 31, 2025
In Comunas, Puerto Rico, September presents a tropical climate characterized by warm temperatures and notable humidity. With maximum highs reaching 30°C (86°F) and average temperatures around 27°C (82°F), residents and visitors can expect warm days tempered by cooler nights, where the temperature can drop to a minimum of 25°C (77°F). However, this month also brings significant rainfall, with an average precipitation of 195 mm (7.7 in) spread over 28 days, making it one of the wetter months of the year. The high humidity level of 79% contributes to the sultry feel of the air, providing a quintessential tropical experience.
In September, temperatures in Comunas, Puerto Rico, continue the trend of warmth characteristic of the region, with minimums averaging at 25°C (77°F) and maximums reaching up to 30°C (86°F). This month's average temperature sits comfortably at 27°C (82°F), closely mirroring the balmy conditions of August. As the summer wanes, the noticeable rise in nighttime temperatures hints at a slight shift towards the distinctly warmer evenings typical of the region. The slight increase in minimum temperatures reflects a gradual transition, suggesting that while September still embraces the lingering heat of summer, it also foreshadows the approach of the cooler months ahead.
September marks a significant escalation in precipitation for the Comunas of Puerto Rico, with an impressive 195 mm (7.7 in) of rain recorded over the month. This surge not only represents the highest rainfall of the year but also showcases an increase in rainy days, with 28 days experiencing precipitation. Following the gradual rise seen from January through August, where rainfall escalated from 52 mm to 148 mm, September's dramatic leap underscores the peak of the wet season. As the month transitions into October, the rainfall begins to taper slightly to 179 mm (7.1 in), suggesting a shift yet maintaining the overall trend of substantial moisture that characterizes this region during the latter part of the year. This pattern of intensified rainfall emphasizes the importance of September as a critical period for water accumulation and ecosystem replenishment in Puerto Rico.
In September, the humidity in Comunas, Puerto Rico, averages 79%, showcasing a slight dip from the peak levels experienced during the summer months of July (81%) and August (80%). This transition signals the gradual shift from the warmer, more humid summer season to the milder conditions of autumn, with several months maintaining a consistent average around 76-78%. The humidity levels remain relatively high throughout the year, indicating the tropical character of the region, but September’s figures remind us of nature’s rhythm as it prepares for the cooler days ahead. Overall, the gradual fluctuations in humidity not only highlight the area's maritime climate but also set a comfortable backdrop for the vibrant life in Comunas during this transitional month.
In September, the UV Index in Comunas, Puerto Rico peaks at an alarming 14, reflecting an extreme exposure category that warrants caution. This surge signals the transition from summer's sweltering heat into a period where sun safety becomes paramount; with a mere 10-minute burn time, it's a stark reminder that even brief sun exposure can lead to skin damage. Overall, September aligns with the trend of consistently high UV readings, as months from February through August maintain extreme levels, seldom dipping below 12. As a reminder, be prepared to protect your skin during these critical months and check Comunas UV Index for daily updates.
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As summer gives way to autumn, September in Comunas, Puerto Rico continues to bask in abundant sunshine, boasting 319 hours of bright, cheerful days. This month marks a slight dip from the peak of 359 hours seen in May, yet it still reflects a generous share of sunlight, as many previous months enjoyed over 300 hours. Interestingly, September's hours demonstrate a balance between the high summer sun and the onset of fall, highlighting the region's consistently sunny disposition throughout the year. As the golden rays persist into October, which remains close behind at 316 hours, the lingering warmth and light continue to invite both locals and visitors to revel in the natural beauty of Puerto Rico's vibrant outdoors.
In Comunas, Puerto Rico, September offers a 50% chance of sunny weather, placing it squarely in the middle of the yearly spectrum. Following the intense sun of February and March, which boast exceptional chances of sunshine at 67% and 64% respectively, the summer months see a notable dip, with June reaching as low as 21%. As September approaches, the likelihood of clear skies shows a slight recovery compared to the preceding months of July (42%) and August (39%). This return to a balanced forecast makes September a delightful choice for those looking to enjoy the island's vibrant culture and natural beauty before the increased rainfall of October and November, which both hover around 48% and 58%. Thus, while September may not guarantee sun-soaked days, it certainly offers a substantial opportunity for warm rays amid the tropical charm of Puerto Rico.
In September, Comunas, Puerto Rico enjoys a delightful 12 hours of daylight, maintaining a steady glow that characterizes the end of summer. This month marks a transition from the extended daylight of the early summer months, which peak at 13 hours in June and July, back to a more moderate duration as the year winds down. Following a gradual decrease from May through August, September's daylight remains stable, mirroring the trend seen earlier in the year during March and April. As autumn approaches, residents can relish the crisp, bright days that transition seamlessly into the shorter days of October, where daylight dips once again to 11 hours.
As September rolls into Comunas, Puerto Rico, the winds take a gentle turn with an average speed of 3.9 m/s (9 mph), marking the year’s lowest point. This subtle drop contrasts with the breezy summer months of July and August, which boasted winds around 6.0 m/s and 5.4 m/s, respectively. As the island transitions from the vibrant summer heat to the cooler autumn days, this decrease suggests a calming shift in the atmosphere. However, September’s winds remain a whisper of movement, providing a serene backdrop as locals and visitors alike bask in the lingering warmth of the departing summer sun.
Weather in Comunas varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Comunas, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January offer distinct weather experiences. In September, temperatures range from a minimum of 25°C (77°F) to a maximum of 30°C (86°F), with an average of 27°C (82°F). This month also sees considerable rainfall, accumulating 195 mm (7.7 in) over 28 days, coupled with high humidity at 79%. In stark contrast, January presents milder temperatures, with a minimum of 22°C (72°F) and a maximum of 27°C (81°F), averaging 25°C (77°F). Additionally, precipitation in January is significantly lower at 52 mm (2.0 in) over 17 days, and humidity remains slightly lower at 76%. For a more detailed look at January weather, check out Comunas weather in January.
September and February present distinct weather patterns. In September, temperatures range from a minimum of 25°C (77°F) to a maximum of 30°C (86°F), with an average of 27°C (82°F). This month also sees substantial rainfall, with 195 mm (7.7 in) spread over 28 days, contributing to a humidity level of 79%. In contrast, February features milder temperatures with a minimum of 21°C (71°F) and a maximum of 27°C (80°F), averaging 25°C (76°F). Rainfall is significantly lower at 54 mm (2.1 in) over 19 days, along with a humidity level of 75%. For a closer look at February weather, check out Comunas weather in February.
September and March present distinct weather patterns in terms of temperature, precipitation, and humidity. In September, the temperatures are generally higher, with a minimum of 25°C (77°F) and an average of 27°C (82°F), peaking at 30°C (86°F). This month also experiences significant rainfall, accumulating 195 mm (7.7 in) over 28 days, accompanied by high humidity at 79%. In contrast, March offers milder conditions, with temperatures ranging from a minimum of 22°C (73°F) to an average of 25°C (77°F) and a maximum of 27°C (82°F). Precipitation drops considerably to 70 mm (2.8 in) over 21 days, with slightly lower humidity at 75%. For more detailed information, you can visit Comunas weather in March.
In September, temperatures are generally warmer, with minimums around 25°C (77°F) and maximums reaching up to 30°C (86°F), compared to April, where the temperatures are slightly lower, ranging from a minimum of 22°C (73°F) to a maximum of 27°C (82°F). Additionally, September sees significantly higher precipitation levels, averaging 195 mm (7.7 in) over 28 days, while April experiences only 69 mm (2.7 in) across 20 days of rainfall. Humidity remains relatively similar in both months, with September at 79% and April at 76%. For more specific insights into weather patterns during April, you can check Comunas weather in April.
In September, the weather tends to be slightly warmer compared to May, with average temperatures ranging from a minimum of 25°C (77°F) to a maximum of 30°C (86°F). In contrast, May features slightly cooler conditions, with average temperatures from 23°C (74°F) to 29°C (84°F). Additionally, September experiences a significantly higher level of precipitation, totaling 195 mm (7.7 in) over 28 days, while May sees only 101 mm (4.0 in) over 25 days. Humidity levels in both months are similar, with September at 79% and May at 76%. For a detailed look at the weather in May, visit Comunas weather in May.
When comparing the weather in September and June, we see some notable similarities and differences. Both months have a similar average temperature, with September slightly warmer with a minimum of 25°C (77°F) compared to June's 24°C (75°F). However, September experiences significantly higher precipitation at 195 mm (7.7 in) over 28 days, while June sees only 103 mm (4.1 in) across 25 days. Humidity levels are slightly higher in September at 79%, compared to 78% in June, indicating a slightly more humid climate during the latter summer month. For more detailed insights, you can explore Comunas weather in June.
When comparing the weather in September and July, both months exhibit warm temperatures, but September tends to be slightly warmer with maximums reaching up to 30°C (86°F) compared to July's 29°C (85°F). The average temperatures remain similar, hovering around 27°C (81°F) for both months. However, September experiences significantly more precipitation at 195 mm (7.7 in) over 28 days, compared to July’s 145 mm (5.7 in) over 27 days. Additionally, humidity levels are quite comparable, with September at 79% and July at 81%. For more details on July weather, you can check out Comunas weather in July.
In comparing the weather conditions of September to those of August, we find that both months maintain a similar temperature range, with September averaging 27°C (82°F) and August slightly lower at 27°C (81°F). However, September experiences more precipitation, totaling 195 mm (7.7 in) over 28 days, compared to August's 148 mm (5.8 in) over 27 days. The humidity levels remain relatively close, with September at 79% and August at 80%. For more detailed insights into August weather, you can visit Comunas weather in August.
In September, the weather is characterized by slightly warmer temperatures, with a minimum of 25°C (77°F) and a maximum of 30°C (86°F), while October sees a minor decrease in maximum temperature, peaking at 29°C (85°F). Both months experience high humidity levels around 79%, but October offers a slight reprieve with humidity dropping to 78%. Precipitation is another notable difference: September averages 195 mm (7.7 in) over 28 days, whereas October sees a reduction to 179 mm (7.1 in) over 26 days, indicating a drier month compared to its predecessor. For additional details on weather patterns, you can check Comunas weather in October.
In September, the weather is generally warmer, with temperatures ranging from a minimum of 25°C (77°F) to a maximum of 30°C (86°F) and an average of 27°C (82°F). This month also sees higher precipitation levels, totaling 195 mm (7.7 in) spread over 28 days, creating a humid atmosphere with an average humidity of 79%. In contrast, November brings slightly cooler temperatures, with a minimum of 24°C (75°F), an average of 26°C (80°F), and a maximum of 29°C (84°F). Additionally, rainfall decreases to 129 mm (5.1 in) over 25 days, resulting in a marginally lower humidity level of 78%. For more detailed insights on weather conditions in November, please refer to Comunas weather in November.
September and December exhibit notable differences in weather patterns. In September, temperatures are slightly higher, with a minimum of 25°C (77°F), an average of 27°C (82°F), and a maximum of 30°C (86°F). The month is marked by significant rainfall, accumulating 195 mm (7.7 in) over 28 days, accompanied by a high humidity level of 79%. In contrast, December presents milder temperatures, with a minimum of 23°C (74°F), an average of 26°C (78°F), and a maximum of 28°C (83°F). Additionally, precipitation decreases considerably to 75 mm (2.9 in) over 22 days, with humidity slightly lower at 77%. For more detailed insights on December weather, visit Comunas weather in December.
As September unfolds in Comunas, the weather gets notably warmer and more humid, contrasting with the cooler, drier months that precede it. The temperature typically hovers around a balmy average of 27°C, with occasional peaks, while the humidity climbs to a notable 79%, creating a tropical feel. This month also brings significant rainfall, with an average of 195 mm spread over nearly every day, marking it as one of the wettest periods of the year. Such weather shifts not only amplify the lush landscapes but also set the stage for unique local experiences. For a deeper dive into the climate trends, visit Comunas Climate.