Last updated: August 21, 2025
September in San Miguel, El Salvador brings a blend of heat and humidity, with maximum temperatures soaring to 36°C (97°F) and an average of 27°C (81°F). While the days can feel warm, the nights cool down to a comfortable 21°C (71°F). Rain is a frequent visitor this month, contributing to a generous 300 mm (11.8 in) of precipitation over 27 days, making the environment lush and vibrant. The high humidity at 77% can create a sticky atmosphere, reminding residents and visitors alike that they are in the midst of the rainy season. Embrace the mix of sun and showers that define this dynamic time of year in San Miguel!
In September, San Miguel, El Salvador, experiences a gentle transition in temperatures as the wet season progresses. The minimum temperature rests at a mild 21°C (71°F), while the average dips slightly to 27°C (81°F). With a maximum of 36°C (97°F), the month feels warm but is notably less intense compared to the sweltering heights reached earlier in the year. This gradual cooling trend signals the onset of fall, providing much-needed relief for both residents and visitors. September's temperatures reflect a delicate balance between lingering summer warmth and the refreshing touch of the upcoming season.
September in San Miguel, El Salvador, marks a peak in the wet season, with precipitation reaching an impressive 300 mm (11.8 in) over 27 days of rainfall. This significant downpour follows a pattern established in the preceding months, where June and August also deliver heavy rains, peaking between 294 mm and 347 mm. By September, the lush landscapes are further nourished, preparing for the final surge of rainfall in October, which tops even September's totals. The gradual increase in both rain volume and precipitation days throughout the summer months vividly illustrates the region's shift into its rainy season, enhancing the vibrant ecosystems and agricultural productivity of San Miguel.
In September, San Miguel, El Salvador experiences a notable humidity level of 77%, which aligns closely with the wetter months of July and August. This slight decrease from August’s peak of 79% indicates a transition towards a more stable climate as the rainy season begins to wane. Throughout the year, humidity levels in San Miguel tend to fluctuate, peaking in the summer months and tapering off towards the end of the year, with January showcasing the driest conditions at 63%. Such trends highlight the tropical climate's impact on the region, where higher humidity levels dominate during the heart of the rainy season.
In September, San Miguel maintains a UV Index of 13, categorizing it as extreme, which means you should be cautious when enjoying outdoor activities. This month continues the trend of sustained high UV levels, similar to what is observed in July and August. The consistency in the UV Index, which requires a burn time of just 10 minutes, highlights the importance of sun protection year-round in this vibrant region. As the dry season approaches, it's crucial to stay vigilant about sun safety. For more insights into the UV levels throughout the year, visit San Miguel UV Index.
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As September rolls into San Miguel, the city basks in a generous 302 hours of sunshine, maintaining a delightful average comparable to the sun-soaked months that preceded it. Following a vibrant July with an impressive 332 hours, the days become slightly less radiant, yet still invigorating. This transition, situated between the height of the rainy season and the glorious onset of the dry months, marks September as a time where the warmth of summer lingers just a bit longer, inviting locals and visitors alike to revel in the picturesque sunsets and outdoor adventures. As October approaches with a forecast of 291 hours, September serves as a lovely reminder of the town's sunny disposition, balancing warmth with a hint of impending change.
In September, the likelihood of sunny weather in San Miguel, El Salvador drops to a modest 21%, making it one of the cloudiest months of the year. This clear trend contrasts sharply with the sun-soaked days of early in the year—January boasts a 72% chance of sunshine, while February peaks at an impressive 80%. As the months transition into late summer, a significant decline in sunny days becomes apparent, with April and May already dipping below the halfway mark. This rainy spell persists through June and August, leaving September with its notably lower chances of clear skies. As the rainy season lingers, those looking for sun might want to plan their trips for other months, when the sun shines more brightly and consistently over San Miguel.
As September arrives in San Miguel, El Salvador, the daylight duration remains consistent at 12 hours—a trend that has persisted since March. This period, nestled within the rainy season, offers a balance of sunlight that illuminates the landscape for nearly half the day, inviting both adventure and relaxation. Following the peak of 12-hour days from March through September, daylight begins its gradual decline in October, transitioning back to 11 hours as the year winds down. This seasonal shift not only marks a change in daylight but also signals the onset of a cooler ambiance, ideal for enjoying the beautiful evenings that San Miguel has to offer.
As September sweeps into San Miguel, El Salvador, the gentle embrace of the wind becomes increasingly noticeable, with average wind speeds dropping to a mild 1.1 m/s (2 mph). This subtle shift marks the culmination of a gradual decline in wind activity since the early months of the year, where breezes danced at around 2.0 m/s (4 mph) in March. Throughout the summer, the winds became quieter, reaching their lowest point in September and August. While the seasonal lull might suggest tranquility, it also invites residents and visitors to relish the warm, humid afternoons. As October approaches, these soft breezes persist, revealing a new rhythm in the lush landscape of El Salvador that beautifully complements the vibrant spirit of this magnificent region.
Weather in San Miguel varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Miguel, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather in San Miguel is characterized by higher humidity and significant rainfall, with average temperatures ranging from a minimum of 21°C (71°F) to a maximum of 36°C (97°F). The month experiences an average precipitation of 300 mm (11.8 in) over 27 days, contributing to a humid atmosphere with 77% humidity.
In contrast, January offers a drier climate, with much lower precipitation of only 1 mm (0.0 in) and no rainy days. The temperature remains comfortably warm, with averages between 18°C (65°F) and 37°C (99°F) but with a reduced humidity level of 63%. For more detailed insights into January weather, you can visit San Miguel weather in January.
September and February present quite different weather patterns. In September, temperatures range from a minimum of 21°C (71°F) to a maximum of 36°C (97°F), with an average of 27°C (81°F). This month is characterized by high humidity at 77% and significant rainfall, receiving around 300 mm (11.8 in) over 27 days. In contrast, February enjoys a warmer climate with a minimum temperature of 18°C (65°F) and a maximum reaching 40°C (104°F), while the average is slightly higher at 29°C (84°F). Remarkably, February sees almost no precipitation, with only 2 mm (0.1 in) recorded over zero days, and a lower humidity level of 62%. For more detailed insights, you can visit San Miguel weather in February.
September and March exhibit contrasting weather patterns in San Miguel. In September, temperatures range from a minimum of 21°C (71°F) to a maximum of 36°C (97°F) with an average of 27°C (81°F). This month is notably wet, experiencing around 300 mm (11.8 in) of precipitation over 27 days, alongside high humidity levels of 77%. In contrast, March features warmer conditions with temperatures ranging from a minimum of 20°C (69°F) to a maximum of 39°C (102°F) and an average of 30°C (86°F). March is characterized by a dry climate, receiving just 5 mm (0.2 in) of precipitation on 0 days and a lower humidity of 59%. For a closer look at March weather in San Miguel, visit San Miguel weather in March.
September and April present distinctly different weather patterns. In September, temperatures range from a minimum of 21°C (71°F) to a maximum of 36°C (97°F), with an average of 27°C (81°F). This month is characterized by high humidity at 77% and significant rainfall, totaling 300 mm (11.8 in) over 27 days. In contrast, April experiences slightly warmer temperatures, with a minimum of 22°C (72°F) and a maximum soaring to 39°C (103°F), averaging at 30°C (86°F). Precipitation is much lower in April, with only 40 mm (1.6 in) over 10 days and a more comfortable humidity level at 59%. For more insights into April weather, visit San Miguel weather in April.
In comparing the weather of September and May, both months experience warm temperatures, with September featuring a minimum of 21°C (71°F) and an average of 27°C (81°F), whereas May has slightly higher temperatures with a minimum of 22°C (72°F) and an average of 28°C (83°F). May also has a more intense peak, reaching up to 39°C (102°F), compared to September's maximum of 36°C (97°F). Precipitation levels are quite similar between the two months, with September seeing 300 mm (11.8 in) over 27 days and May experiencing 294 mm (11.6 in) over 25 days. However, September is characterized by higher humidity at 77%, compared to a more comfortable 59% in May. For a more detailed look at the weather, you can check out San Miguel weather in May.
When comparing the weather in September and June, both months exhibit a similar average temperature of 27°C (81°F), but September tends to be slightly warmer at night with a minimum temperature of 21°C (71°F) compared to June's 22°C (71°F). Both months can reach maximum temperatures of 36°C (97°F in September and 98°F in June), showcasing a consistent heat profile. However, September experiences more rainfall, with 300 mm (11.8 in) over 27 days, while June receives 347 mm (13.6 in) of precipitation over 24 days. This results in a more humid September at 77%, contrasted with the more comfortable 68% humidity in June. For a detailed look at June conditions, you can check San Miguel weather in June.
In September, the weather in San Miguel features slightly cooler average temperatures, with a minimum of 21°C (71°F) and a maximum of 36°C (97°F), compared to July’s higher average temperature range of 21°C (70°F) to 38°C (100°F). September experiences significantly more rain, with 300 mm (11.8 in) of precipitation over 27 days, while July sees only 131 mm (5.2 in) over 17 days. Both months maintain a consistent humidity level of 77%. For a detailed look at the July weather, you can visit San Miguel weather in July.
In comparing the weather of September to that of August, we see some notable differences. September features a slightly lower average temperature of 27°C (81°F) compared to August's 28°C (82°F), with maximum temperatures peaking at 36°C (97°F), down from August's hotter 38°C (101°F). Precipitation levels in September are quite significant, with 300 mm (11.8 in) falling over 27 days, while August has slightly higher precipitation at 316 mm (12.4 in) across 22 days. Humidity remains quite high in both months, with September at 77% and August at 79%. For more detailed information, you can visit San Miguel weather in August.
In September, the weather in San Miguel features warmer temperatures, with a minimum of 21°C (71°F), an average of 27°C (81°F), and a maximum that can reach 36°C (97°F). The month experiences substantial rainfall, totaling 300 mm (11.8 in) over 27 days, with humidity levels consistently around 77%.
Transitioning into October, the temperatures become slightly cooler, with a minimum still at 21°C (70°F) and an average of 26°C (80°F), while the maximum temperature decreases to 34°C (93°F). However, October sees an increase in precipitation to 371 mm (14.6 in) across 28 days, maintaining the humidity at the same level of 77%. For a detailed look at the weather specifics, visit San Miguel weather in October.
In September, the weather is notably warmer with temperatures ranging from a minimum of 21°C (71°F) to a maximum of 36°C (97°F), and the average temperature sits at around 27°C (81°F). This month also experiences high humidity at 77% and significant precipitation, totaling 300 mm (11.8 in) across 27 days. In contrast, November offers slightly cooler temperatures with a minimum of 18°C (65°F) and a maximum of 34°C (94°F), averaging 26°C (80°F). The precipitation significantly decreases to 73 mm (2.9 in) over just 9 days, and humidity dips slightly to 75%. For a more detailed look at the weather specifics, you can check San Miguel weather in November.
In comparing the weather between September and December, we see notable differences in temperature and precipitation. September features a higher humidity level of 77% and experiences more frequent rains, with precipitation totaling 300 mm over 27 days, making it a much wetter month. In contrast, December boasts a lower humidity of 66% and significantly less rainfall, with only 5 mm recorded over just 2 days. Despite both months having an average temperature of around 27°C (81°F), December's temperatures range from a minimum of 18°C (64°F) to a maximum of 36°C (98°F), which is slightly cooler at the lower end compared to September's minimum of 21°C (71°F). For more detailed weather information specific to this period, you can check San Miguel weather in December.
As September unfolds in San Miguel, the weather stands out with its unique blend of warmth and humidity. Unlike the scorching highs of summer, this month offers a more moderate average temperature, while the humidity levels soar, enveloping the city in a moist embrace. Frequent rain showers, characteristic of September, contribute to a significantly higher precipitation total compared to other months, creating a lush, vibrant landscape. For those seeking to understand how this weather pattern contrasts with the rest of the year, more insights can be found in our detailed overview here: San Miguel Climate.