Last updated: August 27, 2025
September in Calamba, Philippines brings a warm and humid atmosphere, with temperatures peaking at a maximum of 32°C (90°F) and maintaining an average of 27°C (81°F). The month is characterized by a significant amount of rainfall, totaling 318 mm (12.5 in) over 26 days, resulting in lush landscapes and vibrant greenery. Humidity levels are notably high at 89%, contributing to the tropical feel of this picturesque locale. Residents and visitors alike can expect a blend of warm weather and frequent showers, making September a unique time to experience the beauty of Calamba.
In September, Calamba, Philippines, experiences mild and comfortable temperatures, continuing the trend established in the previous months. The average temperature hovers around 27°C (81°F), with a minimum of 24°C (76°F) and a peak of 32°C (90°F). This month marks a slight decrease in maximum temperatures compared to the summer's peak in May and June, bringing a refreshing tone to the tail end of the warm season. As the region transitions towards October, the consistent mildness invites locals and visitors alike to enjoy the outdoors, while the lush surroundings begin to hint at the coming rains, characteristic of the upcoming wet season.
In September, Calamba experiences a continuation of its wet season, showcasing a significant precipitation total of 318 mm (12.5 in) over 26 days of rain. This level of rainfall closely mirrors the intense downpours of August, emphasizing a trend of abundant moisture during this time of year. The cumulative rainfall over the previous months—from May's 142 mm to July's peak of 397 mm (15.6 in)—indicates a gradual buildup leading into the latter part of the rainy season. As the region transitions from the heavy rains of mid-year to slightly drier October, September remains a pivotal period where nature's rejuvenation is at its peak, further enriching the lush landscapes of Calamba.
In Calamba, Philippines, September marks a peak in humidity, reaching an impressive 89%. This month sits atop a rising trend that begins with the cooler, drier January at 76% and steadily ascends through the year. As temperatures rise, especially in the summer months of June and July, humidity escalates, culminating in August and September—both holding the same high level of moisture. This consistent humidity, often felt during the rainy season, maintains a sweltering closeness that can linger into the fall. As October approaches, a slight drop to 86% provides a hint of relief, but the overall trend indicates that Calamba's climate remains notably humid through September, lending itself to the lush, vibrant landscapes the area is known for.
In September, Calamba experiences a consistent UV Index of 14, placing it firmly in the extreme exposure category with a quick burn time of just 10 minutes. This figure aligns with the high UV levels observed throughout the summer months, particularly from March to August, where the index peaked at 15 before steadily maintaining at 14 through September. With such intensity, it's essential for residents and visitors alike to prioritize sun protection during this time. As you enjoy outdoor activities in this picturesque locale, always remember to stay safe under the sun. For more detailed information, check out the Calamba UV Index.
UV Risk Categories
September in Calamba, Philippines, ushers in a gentle shift as the summer sun begins to wane, providing 258 hours of daylight. This marks a decrease from the vibrant summer months, peaking in May at 323 hours, and a notable drop from the previous months of June and July. As the year transitions into the latter part, we see a consistent pattern of diminishing sunlight, with September following the trend set by August's 264 hours. Despite the reduction in hours, September still offers a warm embrace of sunshine, perfect for basking in the beauty of the region before the cooler months arrive. The gradual decline hints at the approach of the rainy season, balancing the warmth with the promise of rejuvenating rains.
In Calamba, Philippines, September brings a moderate 16% chance of sunny weather, reflecting a noticeable dip in sunshine compared to the vibrant months leading up to it. As the rainy season sets in, the likelihood of clear skies decreases significantly from the peaks seen in April and May, where sun exposure is robust at 46%. This trend of reduced sunshine continues into the year’s latter months, with only 18% in October. Consequently, those hoping for a sunny getaway in September may find themselves greeted more by clouds than by sun, highlighting the shift towards the wetter season as the year progresses.
In Calamba, Philippines, the month of September embraces a steady pattern of 12 hours of daylight, continuing the trend established since March. This consistent daylight duration marks the peak of the year, reflecting a harmonious balance as the region transitions from the sweltering summer months into the cooler days of the approaching dry season. From January to February, daylight lingers at 11 hours, while a gradual increase unfolds from March to August, culminating in this delightful stability of light in September. As the year progresses, the daylight begins to wane once again in October, with a return to shorter hours. This shift beautifully encapsulates the tropical rhythm of Calamba, where the length of the day enriches the vibrant culture and outdoor lifestyles enjoyed by its residents.
As September unfolds in Calamba, the breeze tends to soften, with average wind speeds dipping to 1.9 m/s (4 mph). This gentle wind is a notable contrast to both the lively gusts of January and December, which peak at 3.7 m/s (8 mph). Following a warm, still June, September's winds carry a sense of calmness, which signals the approach of the more blustery months ahead. Collectively, this gradual decline in wind speed through the summer hints at the region's transition towards the cooler season, making the landscape feel even more serene as nature begins to prepare for a refreshing change.
Weather in Calamba varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Calamba, focusing on differences in temperature, rainfall, humidity, and UV levels.
September weather tends to be warmer and more humid compared to January, with average temperatures reaching 27°C (81°F) and a maximum of 32°C (90°F). This month is characterized by significant rainfall, experiencing 318 mm (12.5 in) over 26 days, resulting in an average humidity of 89%. In contrast, January is slightly cooler, with an average temperature of 25°C (78°F) and a maximum of 30°C (87°F). Precipitation drops dramatically to 88 mm (3.4 in) over just 9 days, leading to a lower humidity level of 76%. For more details on Calamba's weather during this month, you can visit Calamba weather in January.
September and February present distinct contrasts in weather. In September, temperatures range from a minimum of 24°C (76°F) to a maximum of 32°C (90°F), with an average of 27°C (81°F). This month experiences significant rainfall, totaling 318 mm (12.5 in) over 26 days, resulting in high humidity levels at 89%. In contrast, February features milder temperatures, with a minimum of 21°C (71°F) and a maximum of 31°C (87°F), averaging 25°C (78°F). Precipitation during this month is much lower, at just 35 mm (1.4 in) over 5 days, and the humidity drops to a more comfortable 71%. For a deeper look at February weather, check Calamba weather in February.
In September, the weather is characterized by warmer temperatures with an average of 27°C (81°F), peaking at 32°C (90°F), and it experiences significantly higher humidity at 89%. This month is quite wet, with a total precipitation of 318 mm (12.5 in) spread over 26 days, leading to almost daily rainfall. In contrast, March sees slightly cooler temperatures, with an average of 26°C (80°F) and similar maximum temperatures of 32°C (90°F). March is much drier, with only 24 mm (0.9 in) of rain falling over 5 days, and the humidity drops to a more comfortable 68%. For more details on the weather conditions in March, you can check Calamba weather in March.
In comparing the weather of September and April, it's evident that both months experience warm temperatures, with September showcasing a minimum of 24°C (76°F), an average of 27°C (81°F), and a maximum of 32°C (90°F). In contrast, April presents a slightly lower minimum temperature of 23°C (73°F) and a maximum of 33°C (91°F). However, the standout difference lies in precipitation: September faces significant rainfall with 318 mm (12.5 in) over 26 days, while April enjoys much drier conditions with just 23 mm (0.9 in) across 6 days. Additionally, humidity levels are higher in September at 89%, compared to a more comfortable 69% in April, making April a more pleasant month overall for outdoor activities. For more specific details on the climate, you can visit Calamba weather in April.
In comparing the weather of September and May, we see some notable differences. September generally sees slightly lower temperatures with a minimum of 24°C (76°F) and an average of 27°C (81°F), while May tends to be warmer, featuring a minimum of 25°C (77°F) and an average of 28°C (83°F). Additionally, May experiences higher maximum temperatures, reaching up to 34°C (94°F), compared to September's peak of 32°C (90°F). However, September is characterized by much higher precipitation, with 318 mm (12.5 in) falling over 26 days, compared to May's 142 mm (5.6 in) over 18 days. September also has a higher humidity level at 89%, whereas May's humidity averages around 76%. For more detailed information, you can check Calamba weather in May.
In September, the weather is characterized by slightly lower average temperatures, with a minimum of 24°C (76°F) and an average of 27°C (81°F), compared to June, which sees a slightly warmer average temperature of 28°C (83°F). However, September experiences more precipitation, totaling 318 mm (12.5 in) over 26 days, compared to June's 253 mm (10.0 in) over 27 days, resulting in a more humid atmosphere, with September's humidity reaching 89% versus June's 87%. For a more detailed look at the weather conditions, you can visit Calamba weather in June.
When comparing the weather in September and July, both months exhibit similar temperature ranges, with minimums around 24°C (76°F) and average temperatures of 27°C (81°F). However, July edges out slightly with a max temperature of 33°C (91°F) compared to September's peak of 32°C (90°F). Precipitation is notably higher in July, totaling 397 mm (15.6 in) over 30 days, compared to September's 318 mm (12.5 in) over 26 days. Both months maintain high humidity levels, with September slightly higher at 89% versus July's 88%. For a closer look at July weather specifics, you can check this link: Calamba weather in July.
Comparing the weather in September and August reveals some interesting similarities and slight differences. Both months have a minimum temperature of 24°C (76°F) and an average temperature of 27°C (81°F). However, August experiences a slightly higher maximum temperature of 33°C (91°F) compared to September's maximum of 32°C (90°F). When it comes to precipitation, both months see substantial rainfall, with August receiving 319 mm (12.5 in) over 29 days and September receiving 318 mm (12.5 in) over 26 days. Humidity remains consistent at 89% for both months. For a closer look at August weather specifics, check out Calamba weather in August.
In comparing the weather of September and October, we see that both months share similar temperature ranges, with minimums around 24°C (75°F), average temperatures of 27°C (81°F), and maximums reaching 32°C (90°F). However, October experiences less precipitation than September, with 226 mm (8.9 in) over 22 rainy days compared to September's 318 mm (12.5 in) over 26 days. Additionally, humidity levels are slightly lower in October at 86%, compared to September's 89%. For more detailed information, you can check Calamba weather in October.
In comparing the weather between September and November, both months exhibit similar average temperatures, with September ranging from a minimum of 24°C (76°F) to a maximum of 32°C (90°F) and November slightly lower with a minimum of 23°C (74°F) and a maximum of 32°C (89°F). However, September is characterized by significantly higher precipitation, totaling 318 mm (12.5 inches) over 26 days, whereas November sees a decrease to 158 mm (6.2 inches) across just 16 days, suggesting a drier climate. Despite this difference in rainfall, humidity remains consistently high at 89% for both months, creating a humid atmosphere. For a more detailed look at the weather conditions in November, you can check Calamba weather in November.
September weather is characterized by higher temperatures and more humidity, with a minimum of 24°C (76°F) and an average of 27°C (81°F), peaking at 32°C (90°F). It also experiences significantly more rainfall, with 318 mm (12.5 in) of precipitation over 26 days and a humidity level of 89%. In contrast, December offers slightly cooler conditions, with minimum temperatures at 23°C (73°F) and an average of 26°C (79°F), reaching a maximum of 31°C (88°F). Precipitation decreases to 184 mm (7.2 in) over just 15 days, and humidity falls marginally to 86%. For more details, you can check Calamba weather in December.
September in Calamba stands out with its high humidity levels and significant rainfall, making it one of the wettest months of the year. Unlike the warmer and drier months preceding it, this month engages residents and visitors alike with frequent rain showers that often bring a refreshing relief from the heat. The average temperature remains comfortable, but the increased precipitation and cloud cover can create a distinctively different atmosphere compared to the sunnier, drier weeks of summer. As the landscape flourishes with greenery, it’s an ideal time to explore the natural beauty of Calamba. For a deeper dive into the region’s weather patterns, visit Calamba Climate.