Last updated: August 31, 2025
September in San Juan del Sur, Nicaragua, is characterized by warm, tropical weather, with maximum temperatures reaching 31°C (87°F) and an average of 27°C (81°F). The month tends to be quite humid, hovering around 80%, which contributes to the lush greenery of the region. However, it also brings considerable rainfall, with total precipitation amounting to 246 mm (9.7 in) across an impressive 28 days of rain. This blend of warmth and moisture creates a vibrant atmosphere, ideal for experiencing the natural beauty and thriving culture of this coastal paradise.
In September, San Juan del Sur, Nicaragua basks in warm tropical temperatures, with average daily highs reaching around 31°C (87°F). Nights are comfortably mild, dipping to 24°C (76°F), making it an ideal time for beach strolls under the stars. The consistent daily average of 27°C (81°F) reflects a pattern of warmth that prevails through the late summer months. As September arrives, the temperatures continue to mirror those of August, striking a balance that's perfect for both adventure and relaxation, while hinting at the seasonal shift as the year begins to transition into the cooler months ahead.
September marks a significant peak in precipitation for San Juan del Sur, where the tropical climate delivers an impressive 246 mm (9.7 in) of rainfall over 28 days. This month continues the trend established in the preceding months of heavy downpours, particularly following May and June's remarkable totals of 258 mm and 243 mm, respectively. As the rainy season progresses, the intensity and frequency of showers remain prominent, setting the stage for an uninterrupted tapestry of lush greenery. September's rainfall contributes to the region’s vibrant ecosystems, while also hinting at the even heavier deluge to come in October, which averages 361 mm (14.2 in). Such patterns underscore the importance of preparing for the rainy season, as San Juan del Sur's charm thrives amid the moisture-laden air and verdant landscapes.
In September, San Juan del Sur experiences an average humidity of 80%, continuing the trend of high moisture levels that peaks during the summer months. Following July and August, where humidity soared to 85% and 82% respectively, September shows a slight dip but remains significantly elevated, reflecting the region's tropical climate. This month serves as a transitional period, as the humidity begins to recede slightly into October at 79%, hinting at the approaching dry season. Overall, the high humidity levels from July through September can create a lush and vibrant atmosphere, contributing to the area's rich natural beauty, while also posing challenges for comfort and outdoor activities.
In September, San Juan del Sur experiences a UV Index of 13, categorizing it as an extreme exposure risk with a burn time of just 10 minutes. This trend captures the peak intensity of the UV Index seen throughout the preceding months, indicating that sun safety remains crucial as the region transitions from the drier season. Notably, the UV levels have been consistently high from January through September, with only a slight decrease anticipated in October. Visitors and locals alike should be mindful of these conditions by employing adequate sun protection strategies throughout the month. For more detailed information, check out San Juan del Sur UV Index.
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As the warm embrace of September settles over San Juan del Sur, Nicaragua, visitors can expect a generous 295 hours of sunshine, ensuring plenty of opportunities to bask in the vibrant coastal scenery. This month sits just below the peak brightness of the earlier months, particularly March, which boasts a remarkable 334 hours of sun. After a summer of robust sunlight, September maintains a lovely balance, making it an ideal time for beach outings and outdoor adventures. Following September, the sunlight gently dims heading into October, yet the allure of this coastal town remains strong with the promise of pleasant, sun-soaked days. With overall sunshine hours being consistent throughout the year, September serves as a perfect reminder of the beautiful climate that draws travelers to this picturesque destination.
As you plan your visit to San Juan del Sur, September presents a notably lower likelihood of sunny weather, with only a 19% chance of clear skies. This month marks a significant dip following the sunniest months of the year, where February and December boast chances over 70%. The transition into the later part of the year shows an increasing trend in sunny days, with October rising to 34% and November climbing to 47%. However, September often finds itself amidst the rainy season, making it a less favorable time for sun seekers. So, if you're dreaming of beach days, you might want to consider rescheduling to either side of this month for a more sun-drenched experience.
In September, San Juan del Sur enjoys 12 hours of daylight, maintaining a consistency that has characterized the dry season's peak months. As the year transitions from August to October, daylight hours subtly shift, with September standing out as a month where sun-soaked days linger. This extended daylight not only enhances opportunities for beach activities and exploration but also showcases a seamless blend of nature and adventure in this stunning coastal town. Following September, the daylight begins to wane slightly, with October bringing back 11 hours, illustrating a gentle shift toward the shorter days of the latter part of the year.
As September arrives in San Juan del Sur, Nicaragua, the coastal breeze slows to a gentle whisper, with average wind speeds dipping to 4.3 m/s (10 mph). This marks one of the calmest months of the year, a striking contrast to the lively gusts of earlier months. From the brisk highs of March and April, where winds frequently reach 8.6 m/s and 6.4 m/s respectively, to the more tranquil atmosphere of September, it's evident that the region experiences a notable seasonal shift. Following the sultry depths of summer, this quieter wind phase invites both locals and visitors to embrace the serene beauty of the coastline, offering a perfect setting for leisurely seaside activities. As the year progresses into October, winds continue to soften, providing a peaceful backdrop for the vibrant life that thrives in this charming coastal town.
Weather in San Juan del Sur varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Juan del Sur, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between September and January, September tends to be warmer and significantly wetter. The average temperature in September reaches 27°C (81°F), with highs of 31°C (87°F), while January is slightly cooler with an average of 25°C (78°F) and maximum temperatures of 29°C (84°F). Additionally, September experiences much higher precipitation, totaling 246 mm (9.7 inches) over 28 days, in stark contrast to January's modest 17 mm (0.7 inches) across just 5 rainy days. The humidity levels differ as well, with September being more humid at 80% compared to January's 66%. For a detailed look at January's weather patterns, visit San Juan del Sur weather in January.
When comparing the weather in September and February, September is typically warmer and more humid, with average temperatures ranging from a minimum of 24°C (76°F) to a maximum of 31°C (87°F). It also experiences significantly higher precipitation, totaling 246 mm (9.7 in) spread over 28 days, leading to a humidity level of 80%. In contrast, February offers a slightly cooler climate, with temperatures ranging from 22°C (72°F) to 30°C (87°F). This month is notably drier, receiving just 14 mm (0.5 in) of rain over only 4 days, resulting in a lower humidity level of 64%. For more detailed information, you can check San Juan del Sur weather in February.
September and March present distinctly different weather patterns. In September, temperatures range from a minimum of 24°C (76°F) to a maximum of 31°C (87°F), with an average temperature of 27°C (81°F). This month is characterized by high humidity at 80% and significant rainfall, totaling 246 mm (9.7 inches) over 28 days. In contrast, March features slightly lower temperatures, with a minimum of 23°C (73°F) and an average of 26°C (79°F), while still reaching a maximum of 31°C (87°F). Moreover, March enjoys much drier conditions, receiving only 14 mm (0.6 inches) of precipitation across just 3 days, and a considerably lower humidity level of 63%. For more details, check out San Juan del Sur weather in March.
In September, the weather is characterized by warm temperatures ranging from a minimum of 24°C (76°F) to a maximum of 31°C (87°F), with an average of 27°C (81°F). However, it’s marked by significant rainfall, totaling 246 mm (9.7 in) over 28 days, and high humidity at 80%. In contrast, April features similar temperatures, with a minimum of 24°C (75°F) and a maximum of 31°C (89°F), but it experiences much less rainfall, averaging only 20 mm (0.8 in) over just 5 days. The humidity in April is also notably lower at 63%, making it a drier and more comfortable month. For more specific details on the weather in April, you can refer to San Juan del Sur weather in April.
In comparing the weather between September and May, both months showcase similar average temperatures, hovering around 27°C (81°F), with maximums reaching 31°C (87°F) in September and 31°C (88°F) in May. However, September is characterized by higher humidity at 80%, in contrast to May's more comfortable 63%. Precipitation also plays a significant role, with September receiving 246 mm (9.7 in) over 28 days, compared to May’s 258 mm (10.2 in) over just 21 days. This makes September feel much wetter and more humid than May. For more details, check out the San Juan del Sur weather in May.
In comparing the weather of September and June, both months exhibit similar temperature ranges, with minimums around 24-25°C (76°F) and average highs reaching 31°C (87-88°F). However, September tends to be slightly more humid, with levels at 80% compared to June's 74%. Precipitation levels are also comparable, as both months experience around 243-246 mm (9.6-9.7 in) of rainfall, spread over 28 days. For a closer look at June's specific weather patterns, you can check San Juan del Sur weather in June.
In comparing the weather of September and July, we see a similarity in their temperature ranges, with both months primarily featuring a minimum temperature of 24°C (76°F) and an average of around 27°C (81°F for September and 80°F for July). However, September experiences slightly higher maximum temperatures, reaching up to 31°C (87°F) compared to July's 30°C (86°F). Additionally, September is marked by significantly increased precipitation, totaling 246 mm (9.7 in) over 28 days, compared to July's 129 mm (5.1 in) across 27 days, leading to a wetter atmosphere despite the relatively comparable humidity levels of 80% in September and 85% in July. For more on July weather specifics, you can check the details here: San Juan del Sur weather in July.
In comparing the weather of September and August, we find that both months have similar temperature ranges, with September slightly warmer at a maximum of 31°C (87°F) compared to 30°C (86°F) in August. Humidity levels remain high in both months, with September at 80% and August at 82%. However, September experiences significantly more rainfall, totaling 246 mm (9.7 in) over 28 days, compared to August's 190 mm (7.5 in) during the same number of days. This increase in precipitation in September suggests a wetter climate, making it important to be prepared for rainy conditions. For more detailed insights, check San Juan del Sur weather in August.
September and October showcase a transition in weather patterns, with both months experiencing similar minimum temperatures around 24°C (76°F), but October trends slightly cooler on average, with an average temperature of 26°C (80°F) compared to September's 27°C (81°F). While maximum temperatures remain close, peaking at 30°C (86°F) in October and 31°C (87°F) in September, October is characterized by a notable increase in precipitation, totaling 361 mm (14.2 in) over 29 days, compared to September's 246 mm (9.7 in) over 28 days. Humidity levels remain fairly consistent, with 80% in September and a slight decrease to 79% in October. For more detailed insights, check San Juan del Sur weather in October.
In September, the weather tends to be warmer with average temperatures around 27°C (81°F), peaking at a maximum of 31°C (87°F). The month also experiences significant rainfall, averaging 246 mm (9.7 in) over 28 days, contributing to a high humidity level of 80%. In contrast, November sees slightly cooler temperatures, with an average of 26°C (80°F) and a maximum of 29°C (84°F). Precipitation decreases to 158 mm (6.2 in) over 19 days, while humidity remains relatively stable at 79%. Overall, November offers a more moderate climate with less rainfall compared to September. For more specific insights into November weather, check out San Juan del Sur weather in November.
In September, the weather is notably warmer and more humid, with temperatures ranging from a minimum of 24°C (76°F) to a maximum of 31°C (87°F) and an average of 27°C (81°F). This month experiences significant rainfall, totaling 246 mm (9.7 in) over 28 days, resulting in a humidity level of around 80%. In contrast, December offers a slightly cooler and drier climate, with temperatures peaking at 29°C (84°F) and averaging 26°C (79°F), while the minimum remains close at 23°C (73°F). Precipitation drops dramatically to 41 mm (1.6 in) over just 12 days, and humidity decreases to 70%. For a closer look at what to expect, check out San Juan del Sur weather in December.
As September unfolds in San Juan del Sur, the weather shifts notably from the typical warmth experienced during other months. With maximum temperatures reaching around 31°C (87°F) and an average of 27°C (81°F), the heat remains prevalent, but the month is characterized by high humidity levels of 80% that can make it feel warmer. Frequent rain showers totaling 246 mm (9.7 in) across nearly every day transform the landscape into a lush paradise, contrasting sharply with the drier seasons that precede and follow it. This unique combination of warmth and moisture creates a vibrant atmosphere for both locals and travelers, making it an intriguing time to experience the beauty of the region. For more detailed insights into the climate patterns, visit San Juan del Sur Climate.