Last updated: August 21, 2025
September in Izalco, El Salvador presents a tropical climate characterized by warm temperatures and high humidity. Daily maximums reach around 31°C (88°F), while average temperatures hover at a comfortable 25°C (77°F). Visitors can expect a mild minimum of 21°C (70°F) during the cooler nights. However, this month is also marked by substantial precipitation, totaling 391 mm (15.4 in) over 30 days, leading to a humidity level of approximately 77%. Consequently, the weather is both a vibrant showcase of tropical richness and a reminder of the region’s lush, rain-fed landscapes.
In September, Izalco, El Salvador experiences mild temperatures, with minimums around 21°C (70°F) and an average of 25°C (77°F). The maximum temperature typically reaches 31°C (88°F), slightly cooler than the peak summer months but still invitingly warm. This month marks a subtle transition as the region begins to edge toward the cooler October climate. The consistent warmth throughout the year, with average temperatures hovering around the mid-20s, highlights Izalco's tropical climate, making it an appealing destination for those seeking pleasant weather year-round.
September is a notable month for precipitation in Izalco, El Salvador, marked by a staggering 391 mm (15.4 in) of rainfall, the highest recorded for the year. This significant downpour occurs over 30 days, indicating that rain is almost a daily occurrence, transforming the landscape into a lush, vibrant haven. Following the typically intense rains of August, which averages 331 mm (13.0 in), September underscores a peak in the wet season, setting the tone for a continuation of rainy conditions into October. The persistent moisture not only highlights the region's tropical climate but also contributes to the rich biodiversity and agricultural output that characterize this beautiful part of El Salvador.
As summer transitions to fall, September in Izalco, El Salvador sees a reassuringly high humidity level of 77%. This marks a slight decline from the peak experienced in August, when humidity reached 79%. The first half of the year presents a more stable atmosphere, with percentages hovering around the mid-50s to low 60s until June, when humidity begins to climb sharply. By July and August, the region feels the full embrace of moisture, establishing a vivid trend of increased humidity that continues into September. As the month progresses, the humidity remains robust, leading into the slightly cooler October with 77%, hinting at the lingering tropical feel as the rainy season wanes. Overall, September is a crucial month that showcases nature’s transition, with humidity levels inviting both warmth and the freshness of impending autumn.
In September, the UV Index in Izalco, El Salvador, stands at 13, categorizing the exposure as extreme with a burn time of just 10 minutes. This trend of high UV levels continues from the summer months, where indices have consistently hovered around 13 to 14 since March, indicating a strong need for sun protection. As the rainy season approaches in October, the UV Index dips slightly to 12, but remains significantly high, ensuring that visitors and locals alike must remain vigilant about sun safety. For a comprehensive understanding of UV exposure year-round, check out the Izalco UV Index.
UV Risk Categories
As September rolls in, Izalco, El Salvador continues to bask in a generous embrace of sunshine, boasting 297 hours of bright daylight. This month reflects a slight dip from the summer peak in July, which enjoyed a vibrant 327 hours, yet remains comfortably above the average for the year. The sunny trend seen throughout March to August, where hours consistently surpassed 300 hours, hints at a lingering warmth as the region transitions towards the cooler months. Despite a subtle decline in daylight hours, the consistent presence of sunshine throughout the year ensures that Izalco remains a charming haven for sun-seekers even as autumn approaches.
In Izalco, El Salvador, the likelihood of sunny weather in September is relatively low at only 20%, which reflects a noticeable downward trend as the year progresses. After enjoying higher sunshine probabilities in the early months—70% in January and peaking at 81% in February—the chances of clear skies sharply decline as the region moves into the wet season. This pattern continues through the summer months, with July and August dipping to merely 28% and 13%, respectively. As September rolls in, the sun takes a backseat, making way for increased rainfall and cloud cover, which is characteristic of this transitional period. Thus, while sunny days may still occur, they become fewer, inviting visitors to prepare for a more variable climate.
As September arrives in Izalco, El Salvador, daylight remains consistently vibrant, offering 12 hours of sunshine daily. This trend of extended daylight hours has persisted since March, reflecting a season of ample sunlight that stretches from early spring through late summer. Following September, daylight begins to gradually wane, with October bringing a decrease to 11 hours. This seamless transition, where daylight durations reflect the rhythmic dance of the seasons, creates a gentle shift in the ambiance before the shorter days of fall and winter settle in. The month of September stands as a perfect balance, inviting both locals and visitors to relish the warmth and brightness that characterize this beautiful region.
As September unfolds in Izalco, El Salvador, the gentle whispers of the wind carry a unique character, with an average speed of 1.4 m/s (3 mph). This marks a subtle continuation of the summer's calm, where winds have steadily decreased since the warmer months of May and June, which boasted slightly brisker breezes. With each passing day, the air grows stiller, foreshadowing the transition into the more vibrant winds of November and December. The prevailing tranquility of September creates a serene backdrop, perfect for enjoying the lush landscapes and warm, sun-soaked days that this beautiful region is known for.
Weather in Izalco varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Izalco, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is warm and humid, with average temperatures ranging from a minimum of 21°C (70°F) to a maximum of 31°C (88°F). It tends to be quite rainy, with a significant precipitation total of 391 mm (15.4 in) spread over 30 days, resulting in high humidity levels at 77%. In contrast, January offers a more moderate climate, featuring an average temperature of 24°C (76°F) and a maximum of 32°C (91°F), but with much less rainfall—only 7 mm (0.3 in) over just one day. The humidity is also lower in January at 63%, making for a more comfortable experience. For more detailed weather information, you can check Izalco weather in January.
September and February present contrasting weather patterns. In September, temperatures range from a minimum of 21°C (70°F) to a maximum of 31°C (88°F), with an average of 25°C (77°F). This month is characterized by significant rainfall, totaling 391 mm (15.4 in) over 30 days, resulting in a high humidity level of 77%. In contrast, February offers slightly cooler conditions, with temperatures ranging from 16°C (61°F) to 33°C (92°F), still averaging 25°C (77°F). February experiences minimal precipitation, with only 7 mm (0.3 in) over just 2 days and a lower humidity level of 62%. For a detailed look at Izalco's February weather, you can visit Izalco weather in February.
September and March exhibit quite distinct weather patterns. In September, temperatures range from a minimum of 21°C (70°F) to a maximum of 31°C (88°F), with an average of 25°C (77°F). This month is characterized by high humidity at 77% and significant rainfall, totaling 391 mm (15.4 inches) over 30 days. In contrast, March features warmer conditions with a minimum temperature of 18°C (65°F) and a maximum of 33°C (92°F), averaging 26°C (79°F). Notably, March experiences much lower precipitation at only 14 mm (0.6 inches) over just 4 days and a lower humidity of 59%. For more details on the weather in March, you can visit Izalco weather in March.
September and April present contrasting weather conditions. September experiences higher humidity at 77% and more significant rainfall, with 391 mm (15.4 in) over 30 days, making it one of the wettest months. The temperatures range from a minimum of 21°C (70°F) to a maximum of 31°C (88°F). In contrast, April offers a drier climate with only 70 mm (2.8 in) of precipitation over 15 days and lower humidity at 59%. Temperatures during April range from a comfortable 20°C (67°F) at night to a warmer maximum of 33°C (92°F). For more detailed insights on April weather, you can visit Izalco weather in April.
September and May present distinct weather profiles. September maintains a warm temperature range, with a minimum of 21°C (70°F) and a maximum of 31°C (88°F), while May features slightly higher averages, peaking at 32°C (90°F). Precipitation is more abundant in September, totaling 391 mm (15.4 in) over 30 days, compared to May's 310 mm (12.2 in) over 28 days. Additionally, September's humidity levels are considerably higher at 77%, creating a more oppressive atmosphere, while May enjoys a lower humidity level of 59%, contributing to a more comfortable climate. For detailed insights on May weather, you can visit Izalco weather in May.
In comparing the weather between September and June, both months showcase a warm temperature range with minimal variation, as the minimum temperature hovers around 21°C (70°F) and the average temperature remains at approximately 25°C (77°F) to 25°C (78°F). However, June tends to be slightly hotter, with a maximum temperature of 32°C (91°F), compared to September’s peak of 31°C (88°F). Precipitation levels are another key contrast; September experiences more rainfall at 391 mm (15.4 in) spread over 30 days, in contrast to June’s 370 mm (14.6 in) over 28 days, contributing to a higher humidity level of 77% in September versus 68% in June. For a more detailed look at June’s weather, visit Izalco weather in June.
When comparing the weather in September and July, both months experience similar minimum temperatures, starting at a comfortable 21°C (70°F). However, July tends to be slightly warmer on average, with temperatures reaching around 26°C (79°F) compared to September’s average of 25°C (77°F). The maximum temperatures are also comparable, peaking at 32°C (90°F) in July, just one degree higher than September’s maximum of 31°C (88°F).
A notable difference is in the precipitation levels, with September receiving significantly more rainfall at 391 mm (15.4 inches) over 30 days, while July sees only 208 mm (8.2 inches) across 26 days. Both months share the same humidity level of 77%, contributing to a consistently warm and humid climate. For a more detailed look at July weather specifically, you can refer to Izalco weather in July.
In comparing the weather of September and August, both months display similar temperature ranges, with September featuring a minimum of 21°C (70°F), an average of 25°C (77°F), and a maximum of 31°C (88°F). August, on the other hand, sees a slightly higher maximum temperature of 32°C (90°F), yet maintains an average of 25°C (78°F) with a minimum of 21°C (69°F). Precipitation levels in September are higher, totaling 391 mm (15.4 in) over 30 days, compared to August's 331 mm (13.0 in) over 28 days. Humidity levels are also quite close, with September at 77% and August slightly higher at 79%. For more detailed insights, you can view the Izalco weather in August.
In September, the weather is characterized by slightly warmer temperatures, with minimums averaging 21°C (70°F) and maximums reaching 31°C (88°F). The month sees considerable rainfall, totaling 391 mm (15.4 inches) over 30 days, while humidity remains high at 77%. In contrast, October presents a similar average temperature of 25°C (77°F), but with a slightly lower minimum of 20°C (68°F) and slightly higher maximums of 31°C (89°F). The rainfall decreases marginally to 389 mm (15.3 inches) over 28 days, maintaining the consistent humidity level of 77%. For more detailed weather information, you can check Izalco weather in October.
In September, the weather tends to be quite warm with minimum temperatures around 21°C (70°F) and average highs reaching 31°C (88°F). This month also experiences significant rainfall, with a total precipitation of 391 mm (15.4 in) spread over 30 days, resulting in a high humidity level of 77%.
In contrast, November sees slightly cooler minimum temperatures at 18°C (65°F), while the average remains at 25°C (77°F) and the maximum can reach up to 32°C (89°F). Precipitation decreases significantly to 73 mm (2.9 in) over just 13 days, leading to a mild humidity level of 75%. Overall, November offers more stable conditions and drier weather compared to the rainfall-laden September. For more details, you can check Izalco weather in November.
September weather is characterized by warm temperatures, with a minimum of 21°C (70°F), an average of 25°C (77°F), and a maximum reaching 31°C (88°F). However, it is also notably wet, receiving 391 mm (15.4 in) of rainfall over 30 days, contributing to a high humidity level of 77%. In contrast, December offers a slightly cooler climate, with minimum temperatures dropping to 17°C (63°F), while maintaining an average of 25°C (76°F) and peaking at 32°C (89°F). Notably, it is much drier in December, with only 11 mm (0.4 in) of precipitation occurring over just 3 days, and a lower humidity of 66%. For more information on December weather, you can check Izalco weather in December.
As the vibrant month of September unfolds in Izalco, it brings a distinctive shift in weather patterns compared to the rest of the year. With higher humidity levels and consistent rainfall, this month is marked by frequent showers that contribute to a total precipitation of 391 mm—much greater than what is typically experienced in other months. The average temperature remains comfortably warm, but the maximum can soar up to 31°C, creating a unique blend of warmth and moisture. This creates a lush atmosphere that contrasts sharply with the drier, hotter months preceding it. For those planning a visit or simply curious about the local climate, more information can be found at Izalco Climate.