Last updated: August 21, 2025
In September, Kollam, India experiences a tropical climate characterized by a maximum temperature of 30°C (86°F) and an average temperature of 27°C (81°F). The city's weather is significantly influenced by monsoon conditions, resulting in high humidity levels at 85% and substantial rainfall totaling 254 mm (10.0 in) over 27 days. This month creates a lush, vibrant landscape, ideal for both nature enthusiasts and those who appreciate the beauty of a rain-kissed environment.
In September, Kollam, India, experiences a gentle transition in its temperatures as the monsoon begins to taper off. With minimums settling around 25°C (77°F) and averages hovering at 27°C (81°F), the warmth remains quite comfortable. The maximum temperatures peak at 30°C (86°F), illustrating a gradual decline from the summer's higher averages. This month serves as a transition period, where the humidity begins to recede, making the climate feel more refreshing compared to the preceding months of heavy rainfall. Overall, September's weather in Kollam strikes a pleasant balance, inviting both locals and travelers to enjoy the lingering warmth before the cooler months set in.
In September, Kollam experiences a significant downpour, with a robust precipitation total of 254 mm (10.0 in) over approximately 27 rainy days. This month continues the trend of high rainfall from the preceding months, particularly following the peak of the monsoon season, where June exhibited the highest rainfall at 404 mm. The rainfall in September, while slightly lower than the previous months, still contributes to the overall lushness of the region, showcasing the area's tropical climate. This consistent precipitation pattern, combined with the tapering rainy days, hints at both the stability and end of the monsoon's grip, paving the way for a transition into the drier months ahead.
In Kollam, India, September marks a subtle transition in humidity as the monsoon season begins to wane. With an average humidity level of 85%, it remains one of the wetter months but shows a slight decrease from the peaks of July and August, which recorded 86% and 87% respectively. This trend highlights the characteristic moisture-laden atmosphere typical of the region during the monsoon, while also signaling a gradual shift towards drier conditions as October approaches, with humidity dipping to 84%. Each month illustrates a rhythmic ebb and flow, where the months leading up to September see a steady climb in humidity, peaking in the heart of the monsoon before starting to recede, offering a unique glimpse into Kollam's climatic patterns.
In September, Kollam, India, experiences an intense UV Index of 14, categorized as extreme, which signals that sun exposure can lead to skin damage in just 10 minutes. This peak in UV levels during the monsoon transition aligns with the trend observed throughout the summer months, where similar extreme ratings have been recorded from April through August. As the season shifts toward October, there is a slight decline to an index of 12, but it remains crucial for residents and visitors alike to stay vigilant against harmful UV rays. For more insights on managing sun exposure throughout the year, visit Kollam UV Index.
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In September, Kollam, India, basks in an impressive 297 hours of sunshine, comfortably nestled amid the vibrant sunshine patterns of the year. After the sunniest months of March and April, which boast 338 and 325 hours respectively, September maintains a commendable brightness, comparable to the preceding months of May and June, with their slightly lower figures of 297 and 291 hours. This steady glow signifies a transition from the lush monsoon season to drier days, while also hinting at the promise of a radiant October. As the year progresses, Kollam's consistent sunshine hours paint a captivating portrait of a tropical paradise where the warmth of the sun lingers, inviting both locals and travelers to revel in the beauty of the season.
In Kollam, India, the likelihood of sunny weather takes a notable dip as September arrives, with only a 16% chance of sunshine. This decline follows the trend of the monsoon season, where the rainy months of June, July, and August see even lower probabilities of clear skies, peaking at a meager 7% in August. As the year progresses, September fits into a pattern of diminishing sunlight, reminiscent of the wet months preceding it. Interestingly, this is followed by a gradual resurgence in sunshine during the latter part of the year, as seen in October and November, which further emphasizes the climatic transitions in this coastal region. Overall, if you’re planning to enjoy sunny days in Kollam, you might want to look beyond September to experience more favorable weather patterns.
In September, Kollam, India, enjoys a consistent 12 hours of daylight, continuing the trend set in the preceding months of June through August. This extended daylight period creates a vibrant atmosphere, ideal for outdoor activities and exploration. The shift from longer days to shorter daylight duration begins in October, as the sun starts to retreat back to 11 hours. Overall, the data highlights a steady balance of light during the late summer and early autumn, allowing residents and visitors to savor the energetic glow of the sun before the days gradually shorten in the latter part of the year.
As summer transitions into autumn, September in Kollam, India witnesses a slight dip in wind speed, averaging 4.0 m/s (9 mph). This change follows a peak in the monsoon months of July (4.9 m/s) and August (4.1 m/s), marking a gradual easing of the winds after the summer storms. Compared to the earlier months of the year, where the wind speed hovered around 2.2 to 3.1 m/s, September delivers a more invigorating breeze that’s ideal for outdoor activities. This month exemplifies a balance as the region begins to cool down, hinting at the softer winds to come in October, making it a refreshing period for residents and travelers alike.
Weather in Kollam varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Kollam, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January in Kollam exhibit noticeably different weather patterns. September experiences a warmer atmosphere with temperatures ranging from a minimum of 25°C (77°F) to a maximum of 30°C (86°F) and a significant amount of rainfall totaling 254 mm (10.0 in) over 27 days, contributing to high humidity levels at 85%. In contrast, January presents milder temperatures, with a range from 24°C (75°F) to 31°C (88°F), but with drastically reduced precipitation of only 40 mm (1.6 in) across just 7 days and lower humidity at 70%. This makes January a drier and slightly cooler month compared to the humid and rainy conditions of September. For more detailed information, you can explore Kollam weather in January.
September and February present distinct weather contrasts. In September, temperatures range from a mild 25°C (77°F) to a warm 30°C (86°F), accompanied by high humidity levels of 85% and significant rainfall, totaling 254 mm (10.0 in) over 27 days. In sharp contrast, February features slightly higher average temperatures, peaking at 32°C (90°F), but experiences much less precipitation at only 17 mm (0.7 in) over just 5 days, alongside a lower humidity of 64%. This makes February a considerably drier and more comfortable month weather-wise. For a detailed overview of February's climate, you can visit Kollam weather in February.
In September, weather conditions are notably humid, with an average temperature of 27°C (81°F) and a maximum reaching 30°C (86°F). The month experiences significant rainfall, accumulating 254 mm (10.0 in) over 27 days, which contributes to the high humidity levels of 85%. In contrast, March presents warmer and drier weather, with average temperatures rising to 29°C (84°F) and highs of 32°C (90°F). Precipitation is much lighter, totaling only 80 mm (3.1 in) over 18 days, resulting in a lower humidity level of 66%. For more detailed information, check out Kollam weather in March.
In September, the weather tends to be quite humid and rainy, with average temperatures around 27°C (81°F) and high humidity levels at 85%. The month experiences significant rainfall, totaling 254 mm (10.0 in) over 27 days. In contrast, April offers slightly warmer temperatures, with averages reaching 29°C (84°F) and maximums up to 32°C (90°F), but is noticeably drier, receiving only 148 mm (5.8 in) of precipitation over the same number of days. The lower humidity in April, which averages 71%, makes it feel more comfortable despite the higher temperatures. For more details on the weather, you can check Kollam weather in April.
In comparing the weather of September and May, both months experience warm temperatures, with September having a minimum of 25°C (77°F), an average of 27°C (81°F), and a maximum of 30°C (86°F). Conversely, May is slightly warmer, featuring a minimum also at 25°C (78°F), but with a higher average of 28°C (83°F) and a peak temperature of 32°C (90°F). However, September is characterized by significant rainfall, with 254 mm (10.0 in) over 27 days, while May sees even heavier precipitation at 355 mm (14.0 in) over 29 days. Humidity levels are notably higher in September at 85%, compared to May's 77%. For more specific details, you can check Kollam weather in May.
In both September and June, the weather conditions remain quite similar, with average temperatures ranging from a minimum of 25°C (77°F) to a maximum of 30°C (86°F). However, June tends to be a wetter month, receiving approximately 404 mm (15.9 in) of rain over 30 days, compared to September's 254 mm (10.0 in) spread over 27 days. Interestingly, humidity levels are slightly higher in September at 85%, compared to June's 83%. For a more detailed look at June weather in Kollam, you can check out this link: Kollam weather in June.
In comparing the weather between July and September, both months exhibit similar temperature ranges, with minimums around 25°C (77°F), averages near 27°C (81°F), and maximums reaching 30°C (86°F). However, July tends to be wetter, receiving 307 mm (12.1 in) of precipitation over 30 days, compared to September's 254 mm (10.0 in) over 27 days. Humidity levels are also slightly higher in July, at 86%, compared to 85% in September. For more detailed information, you can refer to Kollam weather in July.
In comparing the weather of September and August, both months maintain similar average temperatures, with September slightly warmer, averaging 27°C (81°F) compared to August's 27°C (80°F). However, September experiences less rainfall, with 254 mm (10.0 in) over 27 days, contrasting with August's heavier precipitation of 365 mm (14.4 in) over 29 days. Additionally, humidity levels are slightly lower in September at 85% compared to 87% in August, making for a marginally more comfortable atmosphere. For those interested in a more detailed look at August weather, visit Kollam weather in August.
In both September and October, temperatures remain consistent with minimums of 25°C (77°F), averaging 27°C (81°F), and maximums reaching 30°C (86°F). However, October experiences slightly higher precipitation, with 267 mm (10.5 in) over 29 days compared to September's 254 mm (10.0 in) across 27 days. Despite the minor increase in rainfall, October's humidity is a touch lower at 84%, compared to September's 85%. For more specific details on October weather in Kollam, you can check Kollam weather in October.
In comparing the weather of September and November, we see that both months maintain warm temperatures, with September having a slight edge in minimum and average temperatures. September's minimum temperature is 25°C (77°F) and averages around 27°C (81°F), while November features a comparable minimum of 24°C (76°F) and an average of 28°C (82°F). The maximum temperatures in November reach up to 32°C (90°F), providing a slightly hotter peak than September's 30°C (86°F).
Precipitation also varies, with September receiving more rainfall at 254 mm (10.0 in) over 27 days, compared to November's 207 mm (8.2 in) across 23 days. Humidity levels remain similar, with September at 85% and November at 83%. Overall, while September tends to be wetter, November offers a warmer and slightly drier experience. For more details, you can check out Kollam weather in November.
September weather is characterized by higher humidity levels and significant rainfall, with temperatures typically ranging from a minimum of 25°C (77°F) to a maximum of 30°C (86°F). The month experiences an average temperature of 27°C (81°F) and records about 254 mm (10.0 in) of precipitation over 27 days. In contrast, December presents a slightly warmer climate, with temperatures ranging from 24°C (76°F) to 32°C (89°F), averaging 28°C (82°F). The precipitation is notably lower at 82 mm (3.2 in) over just 10 days, and humidity levels are also in a more comfortable range at 80%. For more detailed insights, check Kollam weather in December.
As September unfolds in Kollam, the humidity rises significantly, enveloping the region in an atmosphere of warmth and moisture. This month typically experiences more frequent and heavier rainfall than the preceding summer months, with precipitation days peaking as the monsoon continues its vigorous hold. Temperatures remain mild, hovering around a comfortable average, yet the persistent dampness creates a unique and sultry climate that sets September apart. For those interested in understanding the overall weather patterns throughout the year, be sure to check out Kollam Climate.