Last updated: August 21, 2025
In September, Ciudad Vieja, Guatemala, experiences a unique blend of climate characteristics that defines its weather patterns. With a maximum temperature reaching 28°C (83°F) and an average of 20°C (68°F), the month provides a comfortable yet humid environment, as humidity levels hover around 82%. However, September is also marked by significant rainfall, accumulating approximately 293 mm (11.6 in) over 27 days, creating a lush and vibrant atmosphere. This combination of warm temperatures and consistent rain shapes the town's rich natural beauty, making it a captivating destination during this time of year.
In September, Ciudad Vieja, Guatemala, experiences mild temperatures that make the month quite pleasant. With a minimum of 13°C (56°F) and a maximum reaching 28°C (83°F), the city maintains a comfortable average of 20°C (68°F). As the rainy season continues, these temperatures reflect a consistent trend seen throughout the year, where warm days cool off during the nights. Compared to the hotter months of April through August, September heralds a slight dip in maximum temperatures, yet maintains a steady warmth that invites outdoor exploration. The climatological rhythm of this charming city continues to embrace visitors with its inviting and balanced weather, perfect for both sightseeing and cultural experiences.
September is a significant month for precipitation in Ciudad Vieja, Guatemala, as it falls within the heart of the rainy season. The city receives an impressive 293 mm (11.6 in) of rain over 27 days, making it one of the wettest periods of the year. This surge in rainfall follows the already robust totals of August and serves as a dramatic climax to the season's precipitation. With the onset of September's rains, lush greenery flourishes, creating a vibrant, picturesque landscape. Interestingly, the rainfall begins to taper off in October, with a notable decrease to 252 mm (9.9 in), signaling the gradual transition towards drier months. Overall, September encapsulates the essence of Ciudad Vieja's tropical climate—a blend of dramatic rains and natural beauty.
In September, Ciudad Vieja, Guatemala, experiences a notable peak in humidity, maintaining a consistent 82%—a level that mirrors the preceding month of August. This high humidity is part of a broader trend observed in the latter half of the year, with the wet season increasing moisture levels, culminating in October's slight rise to 83%. As the year transitions from the drier months of January through April, where humidity dips to a low of 57%, the humidity gradually climbs, reflecting the lush, green landscapes that characterize Guatemala’s rainy season. The latter months showcase a persistent humidity that envelops the region, creating a vibrant tropical atmosphere that captivates residents and visitors alike.
As September rolls into Ciudad Vieja, Guatemala, the UV Index remains high, recorded at 13, which categorizes the exposure as extreme and sets a burn time of just 10 minutes. This consistent trend throughout the year showcases the region's intense sun exposure, peaking in March through July with an index of 14. Even as the month transitions into the fall, the UV levels remain formidable, only slightly decreasing to 12 by October. Travelers and residents alike should take caution and protect their skin, understanding that the sun's power in this beautiful locale is relentless. For detailed charts and updates, visit the Ciudad Vieja UV Index.
UV Risk Categories
As September rolls into Ciudad Vieja, Guatemala, locals and visitors alike enjoy an impressive 286 hours of sunshine, nestled comfortably within a year of vibrant weather patterns. This month follows a summer that boasts an average of 300+ hours, capturing the warm, sunny spirit of the rainy season's transition. While the rainfall tends to increase in September, a notable decrease from the summer's peak hours reveals a lingering warmth that invites exploration of the city's charming streets. This trend showcases how September serves as a bridge, offering a balance of sunlight and refreshing breezes, making it an ideal time for picturesque strolls and cultural experiences amid the enchanting backdrop of historic architecture.
In Ciudad Vieja, Guatemala, the likelihood of sunny weather experiences a notable decline as we transition into September, dipping to a mere 17% chance of sunshine. This marks a significant drop from the vibrant skies seen in the earlier months of the year, where sunny probabilities hover between 61% and 68% from January to February. As the calendar edges toward the rainy season, the sun becomes increasingly elusive; especially when compared to the more temperate October, which sees a slight recovery at 30%. Visitors and locals alike should prepare for the more overcast conditions typical of September, as the sunny days of the earlier months give way to cloudier, rain-prone weather.
In Ciudad Vieja, Guatemala, September marks a continuation of the consistent daylight enjoyed throughout the year. With 12 hours of daylight, the month basks in similar lengths as its preceding summer months. This steady daylight duration creates a vibrant atmosphere, allowing residents and visitors to savor the lush landscapes and cultural richness that thrive under the sun. As the year transitions toward October, daylight begins to wane, dropping back to 11 hours—but for September, the rhythm of equal day and night remains a hallmark, fostering a sense of balance and harmony in this picturesque locale.
As September arrives in Ciudad Vieja, Guatemala, the gentle winds begin to calm, with average speeds dropping to 1.2 m/s (3 mph). This slight decline continues the trend seen throughout the summer months, where wind speeds generally hovered around the lower end of the scale. After peaking earlier in the year, particularly in January and November when breezes reached 2.0 m/s (4 mph), the atmosphere in September embodies a quieter, more serene character. This seasonal shift, characterized by softer winds, invites both residents and visitors to appreciate the tranquil beauty of the historic city as it transitions into the fall months.
Weather in Ciudad Vieja varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Ciudad Vieja, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January showcase distinctly different weather patterns. September tends to be cooler, with average temperatures around 20°C (68°F) and highs peaking at 28°C (83°F), but it also brings significant rainfall, with 293 mm (11.6 in) of precipitation spread across 27 days, resulting in a humidity level of 82%. In contrast, January features slightly milder temperatures, with an average of 19°C (66°F) and maximums reaching up to 29°C (84°F), yet the month is remarkably drier, receiving just 9 mm (0.4 in) of rain over only 2 days, and a lower humidity of 76%. For more details on January weather, check out Ciudad Vieja weather in January.
When comparing the weather in September and February, distinct differences emerge. September typically experiences milder temperatures, with a minimum of 13°C (56°F) and an average of 20°C (68°F), but can peak at 28°C (83°F). This month is also characterized by its significant rainfall, with 293 mm (11.6 in) spread over 27 days, leading to high humidity levels at 82%. In contrast, February presents a slightly cooler minimum temperature of 10°C (51°F) while maintaining the same average of 20°C (68°F), but it can rise to a warmer maximum of 31°C (88°F). Importantly, February is much drier, with only 20 mm (0.8 in) of precipitation over just 5 days and lower humidity at 68%. For more details, you can refer to Ciudad Vieja weather in February.
When comparing the weather in September and March, notable differences emerge in both temperature and precipitation. September features mild temperatures ranging from a minimum of 13°C (56°F) to a maximum of 28°C (83°F), accompanied by high humidity at 82% and significant rainfall of 293 mm (11.6 in) across 27 days. In contrast, March sees slightly lower minimum temperatures at 11°C (52°F) and higher maximums, reaching up to 31°C (88°F), with much less rainfall, averaging only 22 mm (0.9 in) over just 7 days and a lower humidity level of 59%. For a more detailed look at March weather, you can visit Ciudad Vieja weather in March.
When comparing the weather in September and April, we see some notable differences. September tends to be cooler, with average temperatures ranging from a minimum of 13°C (56°F) to a maximum of 28°C (83°F), while April enjoys slightly warmer temperatures, with a minimum of 12°C (54°F) and a maximum reaching up to 31°C (88°F). Additionally, September experiences significantly more rainfall, totaling 293 mm (11.6 in) over 27 days, compared to April's 97 mm (3.8 in) across just 17 days. The humidity levels also diverge, with September being quite humid at 82% compared to April's more comfortable 57%. For a more detailed look at April weather, check out Ciudad Vieja weather in April.
In comparing the weather of September and May, we observe distinct differences in temperature and precipitation patterns. September features slightly cooler temperatures with a minimum of 13°C (56°F) and an average of 20°C (68°F), while May starts at a higher minimum of 15°C (58°F) and an average of 21°C (69°F). Both months experience considerable rainfall, but September receives more, totaling 293 mm (11.6 in) across 27 days, compared to May's 264 mm (10.4 in) over 28 days. Additionally, September has a much higher humidity level of 82%, making it feel more oppressive compared to the more comfortable 65% humidity in May. For a closer look at conditions during this time, you can visit Ciudad Vieja weather in May.
In comparing the weather of September and June, both months share a similar average temperature of around 20°C (68°F), but they differ in their extremes. September experiences slightly cooler mornings with a minimum temperature of 13°C (56°F), while June starts off at 15°C (58°F). In terms of precipitation, June is generally wetter, receiving 358 mm (14.1 in) across 27 days, compared to September's 293 mm (11.6 in). Additionally, June has a lower humidity level of 66% versus September's higher 82%, contributing to a slightly more comfortable atmosphere in June. For more detailed insights about the weather in June, you can visit Ciudad Vieja weather in June.
When comparing the weather in September and July, September tends to be slightly cooler, with average temperatures ranging from a minimum of 13°C (56°F) to a maximum of 28°C (83°F), while July's temperatures range from a minimum of 14°C (58°F) to a maximum of 29°C (85°F). Additionally, September experiences significantly higher precipitation, with 293 mm (11.6 in) spread over 27 days, in contrast to July's 111 mm (4.4 in) over just 16 days. Humidity levels are also higher in September at 82%, compared to July's 75%. For more detailed information about July weather, you can read about Ciudad Vieja weather in July.
In comparing the weather between August and September, we notice that September experiences slightly cooler temperatures, with a minimum of 13°C (56°F) and a maximum of 28°C (83°F), compared to August's minimum of 14°C (57°F) and maximum of 29°C (84°F). Both months have a similar average temperature of around 20°C (68°F to 69°F). However, September sees significantly more precipitation, totaling 293 mm (11.6 in) over 27 days, as opposed to August's 229 mm (9.0 in) over 23 days. Despite the increase in rain, humidity levels remain constant at 82% for both months. For a closer look at August's weather specifics, check out Ciudad Vieja weather in August.
In comparing the weather of September and October, we find that both months exhibit similar average temperatures, with minimums around 13-14°C (56-57°F), average temperatures at 20°C (68°F), and maximums reaching 28°C (82-83°F). However, October tends to be slightly drier, with total precipitation at 252 mm (9.9 in) over 24 days, compared to September's 293 mm (11.6 in) over 27 days. Additionally, humidity levels remain high in both months, with October registering a humidity of 83%, just above September's 82%. This slight decrease in rainfall in October makes it a marginally more favorable month for outdoor activities. For more information, you can check the Ciudad Vieja weather in October.
In comparing the weather between September and November, we can observe some notable differences. September experiences a slightly warmer average temperature of 20°C (68°F) compared to November's average of 19°C (67°F). However, both months share the same maximum temperature of 28°C (83°F). September is marked by significantly higher rainfall, with 293 mm (11.6 inches) spread across 27 days, while November sees much drier conditions, receiving only 50 mm (2.0 inches) over just 7 days. Additionally, humidity levels are relatively similar, with September at 82% and November at 80%. For more detailed information about November's weather in Ciudad Vieja, visit Ciudad Vieja weather in November.
In September, the weather is generally warmer and much wetter, with temperatures ranging from a minimum of 13°C (56°F) to a maximum of 28°C (83°F), and a significant average of 20°C (68°F). The month experiences heavy rainfall, totaling 293 mm (11.6 in) over 27 days, contributing to a high humidity level of 82%. In contrast, December sees cooler temperatures, with a minimum of 10°C (50°F) and an average of 19°C (66°F), maintaining the same maximum of 28°C (83°F). However, it enjoys much drier conditions, with only 12 mm (0.5 in) of precipitation over just 3 days, leading to lower humidity at 76%. For more detailed information on December weather, you can check Ciudad Vieja weather in December.
September in Ciudad Vieja is characterized by its lush, humid climate, setting it apart from the drier months of the year. With the streets often shrouded in a soft mist, temperatures remain pleasantly moderate, offering a welcome respite from the heat of summer. However, this month is also marked by frequent rain, with nearly all days experiencing some level of precipitation, resulting in a total accumulation that far exceeds other months. The increased humidity levels add to the tropical atmosphere, making September a unique time to experience the vibrant beauty of this charming city. For a more detailed look at what to expect throughout the year, visit Ciudad Vieja Climate.