Last updated: August 27, 2025
In Gatun, Panama, September presents a captivating tropical climate characterized by warm temperatures and abundant rainfall. The maximum temperature reaches a sizzling 32°C (90°F), while the average hovers around a comfortable 26°C (79°F), with nightly lows dipping to a cozy 22°C (72°F). This month also sees significant precipitation, accumulating to a dramatic 336 mm (13.2 in) over 30 days, creating a lush and vibrant landscape. With an average humidity level of 87%, September in Gatun is unmistakably humid, offering a rich experience for those who appreciate the unique allure of tropical weather.
In September, Gatun, Panama, continues to bask in warm tropical temperatures that are characteristic of the region. The month showcases a minimum of 22°C (72°F) and peaks at 32°C (90°F), with a consistent average of 26°C (79°F). This stable temperature range mirrors the preceding months, reflecting a slight rise in nighttime warmth compared to earlier in the year. As the rainy season progresses, these warm temperatures create a lush, vibrant atmosphere, perfect for exploring the stunning landscapes and wildlife. With its inviting temperatures and rich natural beauty, September serves as a seamless transition into the heart of Panama's wet season, maintaining that delightful tropical allure.
In September, Gatun, Panama, experiences significant rainfall, recording 336 mm (13.2 in) over the month. This precipitation is a continuation of the wet season, which peaks during the summer months, including July and August, where the region sees its highest averages of 413 mm (16.2 in) and 392 mm (15.4 in), respectively. Notably, September maintains the trend with 30 rainy days, making it a month where moisture is consistently present. While the rain diminishes slightly from the previous months, the overall pattern indicates a persistent and thriving wet environment, reflective of Panama's tropical climate. This trend of high precipitation fosters lush landscapes, but it also sets the stage for a wet October, where rainfall averages rise again, highlighting the region's cyclical weather patterns.
In September, Gatun, Panama experiences a notable increase in humidity, peaking at 87%. This month falls within the tail end of the rainy season, characterized by a gradual rise from the drier months of earlier in the year, where humidity hovered around 69% to 72% from January to April. As the year progresses into the warmer months of May and June, humidity spikes dramatically, reaching 76% and then soaring to a steamy 89% in June. Following this humid peak, the levels remain high throughout the summer, with August maintaining a slight dip to 86% before September's slight rise. This trend highlights Gatun's tropical climate, where humidity consistently influences daily life, creating a lush environment but also a challenging backdrop for comfort.
In Gatun, Panama, the UV Index remains consistently high throughout the year, with September recording a UV Index of 13—placing it in the extreme exposure category along with the preceding months. This trend of sustained high UV levels indicates that sun safety is crucial, as the burn time hovers at a mere 10 minutes for unprotected skin. As we transition from the typically hotter months of April and May, which peak at 15, it's clear that vigilance against harmful UV rays is necessary well into September and beyond. For a detailed look at the UV Index trends year-round, check out Gatun UV Index.
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In September, Gatun, Panama, enjoys a delightful 274 hours of sunshine, which falls in the middle of the year's radiant spectrum. While the sun shines brightest in March with 340 hours, the weather remains enviable throughout the year, with February and April also offering impressive sunlight hours. As summer wanes, rainfall often increases, causing a slight dip in sunshine as seen in June and August. Yet, September maintains this sunny charm, hinting at a potential rebound as autumn approaches. The gradual decline of sunlight from the peak in March creates an inviting atmosphere, making September an ideal time for both relaxation and exploration in this captivating region.
In Gatun, Panama, the likelihood of experiencing sunny weather shows a significant decline from the early months of the year, with January through March boasting a sunny chance around 41% to 42%. However, this trend falls sharply as the year progresses, hitting a low of just 8% in September. The transition into the rainy season sees a dramatic decrease in sunshine, with April's 19% marking the beginning of a notably gloomy period. This pattern highlights the stark contrast in weather, as September, typically regarded as a wet month, makes it one of the least favorable times to seek sun in this tropical locale. As the year wraps up, the possibilities for sunshine begin to rise again, but for September, it remains a month best spent under cover rather than basking in the sun.
In Gatun, Panama, September marks the continuation of the tropical daylight experience, boasting a consistent 12 hours of daylight. This month aligns with the trend established from March through August, where daylight remains abundant, providing ample time for outdoor activities and exploration. As the year transitions into October, daylight decreases to 11 hours, echoing the shorter days of January and February. This rhythm of longer days during the middle of the year and shorter ones as it cools embraces the essence of a tropical environment, ensuring that Gatun enjoys a vibrant interplay of light throughout the seasons.
As September arrives in Gatun, Panama, a noticeable calm settles over the landscape, with average wind speeds dropping to 1.5 m/s (3 mph). This shift marks the continuation of a seasonal trend that began in the previous months, where the winds steadily declined from a slightly brisk 3.7 m/s (8 mph) in March to the gentle breezes of late summer. With the wind at its lowest for the year, the tranquil atmosphere invites opportunities for reflection and serene outdoor activities, signaling a respite before the winds pick up slightly again in November. As the year transitions, the patterns of Gatun’s wind remind us of the ever-changing rhythms of nature.
Weather in Gatun varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Gatun, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January exhibit notable differences in weather patterns. September tends to be significantly wetter, with an average precipitation of 336 mm across 30 days, resulting in high humidity levels of 87%. The temperatures during September range from a minimum of 22°C (72°F) to a maximum of 32°C (90°F), providing a warm and humid atmosphere. In contrast, January features milder conditions, with average temperatures similarly hovering around 26°C (79°F) but experiencing less rainfall at 78 mm over 14 days. The humidity is also lower at 72%, creating a more comfortable climate. For a closer look at January conditions, you can visit Gatun weather in January.
When comparing the weather in September and February, it's evident that both months share similar average temperatures, hovering around 26°C (79°F), but their conditions differ significantly. September tends to be much wetter, with a substantial precipitation of 336 mm (13.2 in) spread over 30 days, resulting in high humidity levels at 87%. In contrast, February experiences a much drier climate with only 31 mm (1.2 in) of rainfall over 12 days and lower humidity at 71%. This makes February more comfortable for outdoor activities compared to the humid, rainy conditions typical of September. For more details, you can check out Gatun weather in February.
September and March share similar temperature ranges, with both months experiencing minimum temperatures around 21-22°C (70-72°F) and high averages of 26°C (79°F). However, September is marked by significantly higher precipitation, averaging 336 mm (13.2 in) over 30 days, compared to March's much drier 43 mm (1.7 in) spread over just 15 days. Additionally, September's humidity level is notably higher at 87%, while March maintains a more comfortable 69%. For more specific weather details, check out Gatun weather in March.
When comparing the weather in September to that of April, a few notable differences emerge. September experiences slightly lower temperatures, with a minimum of 22°C (72°F) and an average of 26°C (79°F), while April has a minimum of 21°C (70°F) and averages 27°C (80°F). Both months show similarities in maximum temperatures, hovering around 32°C (90°F) in September and peaking at 33°C (91°F) in April. However, the most significant contrast is in precipitation; September sees a substantial amount of rainfall at 336 mm (13.2 in) over 30 days, compared to April's much lighter 130 mm (5.1 in) over 25 days. Additionally, September has higher humidity at 87%, whereas April's humidity is lower at 71%. For more specific information on weather conditions during April, you can refer to Gatun weather in April.
In comparing the weather of September and May, both months exhibit similar temperature ranges, with minimums around 22-23°C (72-73°F), average temperatures consistently at 26°C (79-80°F), and maximums peaking at 32°C (90°F). However, September is characterized by higher humidity levels at 87%, compared to May’s more comfortable 76%. Precipitation slightly favors September, with 336 mm (13.2 in) over 30 days, while May sees 341 mm (13.4 in) over 31 days, making both months quite rainy. For a detailed look at May weather, check out Gatun weather in May.
In comparing the weather between September and June, it’s notable that both months share similar temperature ranges, with minimums at 22°C (72°F), average temperatures around 26°C (79-80°F), and maximums peaking at 32°C (90-91°F). However, September experiences slightly less precipitation at 336 mm (13.2 in) compared to June's 363 mm (14.3 in), despite both months having the same number of rainy days at 30. Humidity levels are also quite similar, with September at 87% and June slightly higher at 89%. For more details on June weather in Gatun, visit Gatun weather in June.
In comparing the weather of September and July, we see some notable similarities and differences. Both months have an average temperature of 26°C (79°F) and reach maximums of 32°C (90°F). However, September tends to have slightly cooler minimum temperatures at 22°C (72°F) compared to July's 23°C (73°F). Precipitation is significantly higher in July with 413 mm (16.2 in) over 30 days, while September sees 336 mm (13.2 in) across the same period. Additionally, humidity levels remain high in both months, with September at 87% and July at 88%. For more detailed insights, you can visit Gatun weather in July.
In comparing the weather conditions of September and August, we notice that both months share similar temperature ranges, with minimums at 22°C (72°F), averages at 26°C (79°F), and maximums reaching 32°C (90°F). However, September experiences slightly lower precipitation, with 336 mm (13.2 in) compared to August's 392 mm (15.4 in), despite both months having rainfall across 30 days. Humidity levels are comparable as well, with September at 87% and August at 86%. For additional details, you can check out Gatun weather in August.
September and October exhibit similar temperature patterns, with both months maintaining a minimum of 22°C (72°F) and an average of 26°C (79°F). However, October sees a slight increase in maximum temperature, reaching 32°C (91°F) compared to September's 32°C (90°F). Precipitation levels are slightly higher in October, totaling 362 mm (14.2 in) over 29 days, whereas September records 336 mm (13.2 in) across 30 days. Humidity remains consistent, with October at 86% and September at 87%, creating a steamy environment typical of this tropical region. For more detailed information, you can check Gatun weather in October.
In September, temperatures are relatively warm, with a minimum of 22°C (72°F), an average of 26°C (79°F), and a maximum reaching 32°C (90°F). The month experiences substantial rainfall, totaling 336 mm (13.2 in) over 30 days, contributing to a high humidity level of 87%. In contrast, November's weather remains similarly warm, with temperatures ranging from a low of 22°C (72°F) to a high of 31°C (89°F), and an average of 26°C (78°F). While November sees slightly less precipitation at 285 mm (11.2 in) over 29 days, humidity is slightly reduced to 86%. For more details on November weather specifics, you can check Gatun weather in November.
September and December present distinct weather patterns despite having similar average temperatures. In September, temperatures range from a minimum of 22°C (72°F) to a maximum of 32°C (90°F), accompanied by significant rainfall totaling 336 mm (13.2 in) over 30 days, resulting in high humidity levels at 87%. In contrast, December maintains a similar temperature range (22°C to 31°C or 72°F to 88°F) but experiences much lower precipitation at 149 mm (5.9 in) over 25 days, with humidity dropping to 79%. This combination makes December a less humid and drier month compared to the wet and humid September. For more details, check out Gatun weather in December.
As September unfolds in Gatun, the weather takes a distinctive turn, marked by its high humidity and frequent rainfall. Unlike the drier months, this period sees substantial precipitation with nearly every day experiencing rain, creating a lush, vibrant environment. The temperatures remain warm, averaging around 26°C (79°F), making it a noteworthy contrast to the more scorching peak summer months. This combination of warmth and humidity can feel quite intense, emphasizing the tropical essence of Gatun. For those looking to delve deeper into the local climate patterns, explore more here: Gatun Climate.