Last updated: August 31, 2025
In September, Fajardo, Puerto Rico, experiences a tropical climate characterized by warm temperatures and high humidity. With a maximum temperature reaching up to 31°C (88°F) and an average of 27°C (82°F), the weather remains consistently warm, while the minimum temperature rarely dips below 24°C (76°F). This month also sees significant precipitation, totaling 195 mm (7.7 in) over 28 days, making it one of the wetter periods of the year. Combined with a humidity level averaging 79%, September in Fajardo offers a lush, vibrant landscape, highlighting the beauty and dynamism of Puerto Rican weather.
In September, Fajardo, Puerto Rico, basks in warm tropical weather, marking the transition from summer to fall. The temperatures during this month typically range from a minimum of 24°C (76°F) to a maximum of 31°C (88°F), with an inviting average of 27°C (82°F). This trend showcases a slight increase in warmth compared to the preceding months, hinting at the lingering summer heat. As September also signals the heart of the hurricane season, visitors are advised to stay informed while enjoying the sun-soaked days and vibrant evenings typical of this beautiful coastal town. The comfort of the warm sea and colorful sunsets make it a captivating time to experience Fajardo.
September marks a peak in precipitation for Fajardo, Puerto Rico, with an impressive 195 mm (7.7 in) of rain falling over 28 days. This significant increase in rainfall, compared to previous months, reflects a clear trend as the region transitions into the wetter season. Following the summer months of July and August, which also feature high rainfall, September showcases the culmination of storm patterns, adding to the lush, tropical environment. As we move from the summer's peak to milder conditions in October, the lingering September showers often create vivid landscapes, emphasizing the beauty of Puerto Rico's natural scenery forged by its diverse rainfall patterns.
In Fajardo, Puerto Rico, September offers a relative reprieve in humidity, with levels averaging around 79%. This slight decline follows the peak summer months of July and August, which both register a high of 80%. The trend shows that as summer wanes, humidity levels modestly drop but remain consistently high compared to the cooler months, where humidity averages hover between 74% and 76%. As the year progresses into October, humidity remains comparable at 78%, suggesting that while fall brings slight relief, the tropical climate retains its characteristic moistness throughout much of the year. The gradual ebb and flow of humidity in Fajardo not only shapes the local environment but also adds to the region's lush, vibrant scenery.
In Fajardo, Puerto Rico, September marks a peak in sun intensity, boasting a UV Index of 14, classified as extreme with a dangerously short burn time of just 10 minutes. This trend of elevated UV levels, prevalent throughout the summer months, highlights the need for sun protection, especially as the year moves from the high of summer and into the early fall. Notably, the UV Index remains consistently high from February through September, with values hitting extremes in the spring and summer. As temperatures cool slightly in October, the UV Index does drop to 12, yet the caution advised in September remains relevant year-round. For those enjoying Fajardo's beautiful outdoors, staying informed about the UV Index is essential—check out the detailed forecast at Fajardo UV Index.
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In Fajardo, Puerto Rico, September shines brightly with an impressive 318 hours of sunshine, making it a delightful time to soak up the sun. This month stands out as a continuation of the warm, sun-soaked summer months, following July's peak of 354 hours. The sunshine slowly begins to taper off into the fall, as October brings slightly less light with 316 hours. Overall, this consistent abundance of sunlight from January through September showcases Fajardo's vibrant tropical climate, where sunshine remains a central feature year-round, making it a perfect escape for sun-seekers and outdoor enthusiasts alike.
In Fajardo, Puerto Rico, the likelihood of sunny weather in September hovers around 46%, reflecting a trend of variability throughout the year. While January and February boast higher chances of sun at 50% and 65%, respectively, the summer months take a dip, with June reaching as low as 20%. Interestingly, September's sunshine probability is akin to October's, both sitting at 46%, suggesting that the transition to autumn doesn't drastically change the weather patterns. As we move towards the end of the year, the chance of sunny days begins to rise again, with November and December offering increased sunshine, peaking at 59%. Overall, September stands out as a month of fluctuating but promising sunny possibilities.
In Fajardo, Puerto Rico, the daylight duration exhibits a captivating rhythm throughout the year, with September enjoying a generous 12 hours of sunlight. This month marks a transition point where daylight begins to taper off after the summer months, paralleling the patterns observed from March to August, where longer days prevail. Interestingly, the daylight duration remains consistent in September compared to August, hinting at the lingering warmth of late summer. As the year progresses towards October, the sunlight gently recedes to 11 hours, signaling the onset of shorter days. This gradual shift underscores the tropical charm of Fajardo, where daylight creates a vibrant backdrop for both relaxed beach days and captivating sunsets.
In September, Fajardo, Puerto Rico, experiences its gentlest winds of the year, with an average speed of only 3.2 m/s (7 mph). This month marks a notable dip from the breezy summer months, where winds ranged from 4.4 m/s to 5.0 m/s from June to August. As the tropical heat begins to ease, the calmer breezes of September create a serene backdrop, perfect for leisurely strolls along the coast or enjoying the tranquil waters. Interestingly, this trend of decreasing wind speed continues into the fall, with October and November showing only slight increases. Overall, September's mellow winds invite relaxation and reflection, a delightful contrast to the preceding summer's playful gusts.
Weather in Fajardo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Fajardo, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures in Fajardo are notably warmer, ranging from a minimum of 24°C (76°F) to a maximum of 31°C (88°F), with an average temperature of 27°C (82°F). The month is also characterized by higher precipitation, totaling 195 mm (7.7 in) over 28 days, and a humidity level of 79%. In contrast, January experiences milder weather, with temperatures ranging from a minimum of 21°C (70°F) to a maximum of 28°C (83°F) and an average of 25°C (77°F). The rainfall in January is significantly reduced to 57 mm (2.3 in) over 17 days, and humidity dips slightly to 76%. For more details on the January weather, see Fajardo weather in January.
September and February exhibit notable differences in weather patterns. In September, temperatures are warmer with a minimum of 24°C (76°F) and an average high reaching 31°C (88°F), while February boasts cooler temperatures with a minimum of 21°C (70°F) and maximums around 27°C (81°F). Additionally, September experiences higher precipitation, totaling 195 mm (7.7 in) over 28 days, compared to February's 61 mm (2.4 in) across 21 days. Humidity levels are slightly elevated in September at 79%, while February's humidity is a bit lower at 75%. For more detailed information, check out Fajardo weather in February.
September and March exhibit notable differences in weather patterns. September tends to be warmer, with temperatures ranging from a minimum of 24°C (76°F) to a maximum of 31°C (88°F) and an average temperature of 27°C (82°F). In contrast, March offers slightly cooler conditions, with temperatures varying from a minimum of 22°C (72°F) to a maximum of 28°C (82°F) and an average of 25°C (76°F). Additionally, September experiences significantly higher precipitation, totaling 195 mm (7.7 in) over 28 days, compared to March’s 78 mm (3.1 in) over 22 days. Humidity levels are also slightly higher in September at 79%, while March has a humidity level of 74%. For more detailed information, you can visit Fajardo weather in March.
In comparing the weather of September and April, September tends to be warmer with average temperatures ranging from a minimum of 24°C (76°F) to a maximum of 31°C (88°F), while April has slightly cooler temperatures averaging between 22°C (71°F) and 29°C (84°F). Additionally, September experiences significantly higher precipitation with 195 mm (7.7 in) over 28 days, compared to April's 79 mm (3.1 in) over 20 days. Humidity levels are relatively similar, with September at 79% and April slightly lower at 75%. For more detailed information about April weather, you can check out Fajardo weather in April.
When comparing the weather in September and May, September tends to be warmer and wetter. September boasts temperatures ranging from a minimum of 24°C (76°F) to a maximum of 31°C (88°F), with an average of 27°C (82°F). In contrast, May has slightly cooler temperatures, with a minimum of 23°C (73°F), an average of 26°C (79°F), and a maximum of 29°C (85°F). Additionally, September experiences significantly higher precipitation, totaling 195 mm (7.7 in) over 28 days, compared to May, which sees 109 mm (4.3 in) over 26 days. Humidity levels are also slightly higher in September at 79%, while May's humidity averages around 75%. For more detailed information about May weather, check out Fajardo weather in May.
The weather in September and June shows some similarities, as both months have a minimum temperature of around 24°C (75°F) and an average temperature close to 27°C (80°F). However, September tends to be slightly warmer with a maximum temperature of 31°C (88°F), compared to June's 30°C (87°F). Precipitation levels differ notably, with September receiving 195 mm (7.7 in) over 28 days, while June sees just 110 mm (4.3 in) across 26 days, making September significantly wetter. Additionally, September's humidity is slightly higher at 79%, compared to June's 77%. For more details, you can check Fajardo weather in June.
In comparing the weather of September to July, we see similar warm temperatures, with both months experiencing a minimum of around 24°C (75°F), average temperatures close to 27°C (81°F), and maximums reaching 30-31°C (86-88°F). However, September is notably wetter, with a total precipitation of 195 mm (7.7 in) across 28 days, compared to July's 149 mm (5.9 in) over 27 days. Additionally, humidity remains high in both months, averaging 79% in September and 80% in July. For more detailed insights, check out this resource: Fajardo weather in July.
In comparing the weather between August and September, both months display similar temperature ranges, with minimum temperatures consistently around 24°C (76°F) and average temperatures hovering at 27°C (82°F). However, September experiences slightly higher maximum temperatures, reaching up to 31°C (88°F), compared to August's 30°C (87°F). Precipitation also increases notably in September, totaling 195 mm (7.7 in) over 28 days, compared to August's 153 mm (6.0 in) over 27 days. Humidity remains relatively stable, with September at 79% and August slightly higher at 80%. For a closer look at August's weather specifics, you can check Fajardo weather in August.
September and October share similar weather patterns, but October tends to be slightly milder. Both months have a minimum temperature of around 24°C (75°F), with October averaging a degree lower at 27°C (81°F) compared to September's 27°C (82°F). The maximum temperatures in October reach up to 30°C (87°F), just a degree cooler than September's 31°C (88°F). While both months experience considerable rainfall, September sees 195 mm (7.7 in) over 28 days, whereas October has slightly less precipitation at 187 mm (7.4 in) over 26 days. Humidity remains quite high in both months, with September at 79% and October at 78%. For a more detailed look at October weather, you can check Fajardo weather in October.
In comparing the weather conditions of September and November, September exhibits slightly warmer temperatures, with an average of 27°C (82°F), while November sees a decrease to an average of 26°C (80°F). Although both months maintain high humidity levels, September has a marginally higher humidity rate of 79%, compared to November's 78%. Rainfall is notably more prevalent in September, with 195 mm (7.7 in) of precipitation over 28 days, while November experiences less rainfall at 131 mm (5.2 in) over 25 days. For more specific details about November weather, you can check Fajardo weather in November.
In comparing the weather between September and December, September tends to be warmer, with average temperatures reaching 27°C (82°F) and maximums of 31°C (88°F). In contrast, December features slightly cooler temperatures, with an average of 26°C (78°F) and maximums of 29°C (85°F). Additionally, September experiences significantly higher precipitation, totaling 195 mm (7.7 in) over 28 days, compared to December’s much drier 81 mm (3.2 in) over 24 days. Humidity levels are also slightly higher in September at 79%, while December's humidity remains at 76%. For more specific weather details, you can check Fajardo weather in December.
As September unfolds in Fajardo, the weather takes on a distinct character, marked by high humidity and frequent rainfall that sets it apart from the drier summer months. While temperatures remain pleasantly warm, hovering around 27°C (82°F) on average, the near-daily precipitation—totaling an impressive 195 mm (7.7 in)—creates a lush, vibrant landscape. With rain gracing nearly every day of the month, September offers a unique blend of tropical beauty that invites visitors to experience the island's natural wonders. For more insights into what to expect throughout the year, visit Fajardo Climate.