Last updated: August 21, 2025
September in Coimbatore, India, brings a warm and humid atmosphere, with temperatures averaging 26°C (79°F), peaking at a maximum of 34°C (93°F) and dipping to a comfortable 22°C (71°F). This month is characterized by substantial rainfall, accumulating to about 127 mm (5.0 in) over 19 days, creating a lush, vibrant backdrop for the city. With humidity levels soaring at 87%, the air is both thick and refreshing, making September a quintessentially tropical experience for residents and visitors alike.
In September, Coimbatore experiences a gentle transition in its weather, with temperatures reflecting both warmth and a hint of the impending monsoon. The minimum temperature settles at a comfortable 22°C (71°F), while the average hovers around 26°C (79°F). Daytime highs reach up to 34°C (93°F), signaling the lingering heat of summer, yet there’s a noticeable drop from the sweltering peak months of April and May. As the month progresses, humidity begins to climb, especially with the arrival of the monsoon, leading to occasional rain showers that refresh the atmosphere and offer respite from the heat. This blend of warm days and cooling nights makes September a vibrant time in Coimbatore, marking the slow shift towards the more temperate weather of autumn.
In September, Coimbatore experiences a notable spike in rainfall, with 127 mm (5.0 in) of precipitation recorded over 19 days. This marks a slight decrease from August’s heavier deluge of 157 mm, yet still contributes significantly to the monsoon season, maintaining the trend of increasing precipitation that began in June. As the month progresses, the steady rhythm of rain serves to nourish the lush landscape that characterizes the region, highlighting the importance of September as a transitional period in Coimbatore's climate. The lingering humidity and frequent showers set the stage for October's expected surge, where precipitation typically peaks at 184 mm (7.2 in), showcasing the persistent influence of the monsoon.
September in Coimbatore, India, is characterized by consistently high humidity, reaching a notable 87%. This month continues the trend established in the peak monsoon months of July and August, where humidity levels also soared to 87%. Following the sweltering heat of May and June, which recorded 81% and 84% humidity respectively, the onset of September maintains this elevated moisture content in the air, creating a sultry atmosphere. As the year progresses into October, humidity begins to slightly wane to 84%, hinting at the gradual transition out of the monsoon season. Overall, September's high humidity underscores Coimbatore's tropical climate, providing a lush and vibrant environment, though one that can also feel quite oppressive for its residents.
In September, Coimbatore continues to experience a high UV Index of 14, maintaining its trend of extreme exposure that has been consistent throughout the year. With a burn time of just 10 minutes, residents and visitors alike should exercise caution, protecting their skin from harmful UV rays. This month aligns with the peak levels seen in both July and August, reiterating the importance of sun safety measures during this period. As the year progresses toward October, the UV Index shows a slight decrease to 12, indicating a potential reprieve from the extreme conditions. For more detailed insights about UV levels in Coimbatore, visit Coimbatore UV Index.
UV Risk Categories
As September rolls into Coimbatore, the city basks in a welcoming 289 hours of sunshine, marking a slight dip from the vibrant summer months. Following the peak of 339 hours in March, the sunlight gradually lessens, creating a gentle transition into the cooler season. Interestingly, September's brightness remains consistent with October's offerings, suggesting a steadfast warmth that lingers in the air. This month serves as a delightful bridge from the lush landscapes of the monsoon, providing ample opportunities for outdoor exploration before the year's end—an invitation to savor the lingering sunshine before the days grow shorter. The consistent trend of above 276 hours from August, combined with the steady warmth, paints a charming picture for all who experience this golden period in Coimbatore.
September in Coimbatore, India, sees a notable decrease in sunny weather, with only a 13% chance of sunshine. This trend follows a significant drop from the preceding months, where the chances of sun plummeted from the moderate levels of April (42%) to a mere fraction as the region transitions into the monsoon aftermath. The gloom of August (8%) lingers, making September one of the least favorable months for sunny weather. As the year progresses into October and November, the likelihood continues to dwindle, underscoring the persistent influence of the monsoon season. Thus, if you're planning activities under the sun, it's best to look earlier in the year, as September's weather tends to be more overcast and wet than bright and sunny.
In Coimbatore, India, the trend of daylight duration reveals a rhythm beautifully in sync with the changing seasons. Starting the year with a consistent 11 hours of daylight in both January and February, the days gradually expand, peaking at 12 hours from March through September. This period showcases a stable length of daylight that supports both outdoor activities and agricultural practices. As October approaches, the daylight dips back to 11 hours, heralding the onset of shorter days. This cycle illustrates the region's mild and predictable climate, offering a reliable pattern that locals have come to appreciate throughout the year.
As September rolls into Coimbatore, the wind begins to whisper a gentle farewell to the monsoon season, with an average speed of 3.7 m/s (8 mph). This slight dip from the previous months, particularly the 4.0 m/s (9 mph) of July and June, reflects a subtle transition as the city prepares for drier days ahead. The breeze, while still noticeable, signals an easing as cooler air begins to replace the hot summer gusts. With September's winds slightly less robust than their peak during the height of the rainy season, residents can relish the transformation in the atmosphere, hinting at the approaching October, marked by a further reduction to 2.1 m/s (5 mph). This gradual decline suggests a shift toward calmness, evoking the nostalgic charm of early autumn.
Weather in Coimbatore varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Coimbatore, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present contrasting weather conditions. In September, temperatures range from a minimum of 22°C (71°F) to a maximum of 34°C (93°F) with an average of 26°C (79°F). This month experiences considerable rainfall, with 127 mm (5.0 in) spread over 19 days, coupled with high humidity at 87%. In contrast, January's weather is milder, featuring a minimum temperature of 18°C (65°F) and a maximum of 33°C (92°F), with a lower average of 24°C (76°F). Precipitation drops significantly to just 29 mm (1.1 in) over 4 days, and humidity decreases to 64%. For more details, you can check Coimbatore weather in January.
September and February present contrasting weather patterns. In September, the temperatures range from a minimum of 22°C (71°F) to a maximum of 34°C (93°F), with an average of 26°C (79°F). This month is also marked by higher humidity at 87% and significant rainfall, with 127 mm (5.0 in) of precipitation spread over 19 days. In contrast, February tends to be slightly cooler, with temperatures varying from a minimum of 18°C (65°F) to a maximum of 36°C (97°F), while still averaging 26°C (79°F). This month experiences significantly less rainfall, with only 8 mm (0.3 in) recorded over just 1 day, and lower humidity at 57%. For more detailed insights, visit Coimbatore weather in February.
In September, the weather is characterized by a warmer, more humid climate, with average temperatures ranging from 22°C (71°F) to a maximum of 34°C (93°F). The month experiences significant precipitation, totaling 127 mm (5.0 in) over 19 days, contributing to a humidity level of 87%. In contrast, March offers a drier and hotter experience, with average temperatures between 20°C (68°F) and a peak of 38°C (101°F). This month sees only 19 mm (0.7 in) of rainfall across just 4 days, resulting in a lower humidity level of 57%. For a more detailed look at the climate in March, you can visit Coimbatore weather in March.
In comparing the weather between September and April, September tends to be more humid and wetter, with an average temperature of 26°C (79°F), maximums reaching 34°C (93°F), and substantial precipitation of 127 mm (5.0 in) over 19 days. In contrast, April experiences higher average temperatures at 30°C (86°F) and can soar up to 39°C (103°F), but it sees significantly less rainfall, totaling only 28 mm (1.1 in) over just 6 days. The overall humidity is also lower in April at 68%, making it feel more comfortable. For more details about the April climate, visit Coimbatore weather in April.
When comparing the weather in September and May, both months feature warm minimum temperatures, averaging around 22°C (71°F to 72°F). However, May tends to be hotter overall, with average highs reaching 38°C (101°F) compared to September's peak of 34°C (93°F). Rainfall is significantly higher in September, accumulating to 127 mm (5.0 in) over 19 days, whereas May receives just 73 mm (2.9 in) across 14 days. Additionally, humidity levels are slightly elevated in September at 87%, compared to 81% in May. For more specific details on May's climate, check out Coimbatore weather in May.
In comparing the weather patterns of September and June, both months exhibit warm temperatures, with September having a similar minimum temperature of 22°C (71°F) but a slightly lower average of 26°C (79°F) compared to June's average of 27°C (80°F). June experiences higher maximum temperatures, reaching up to 36°C (97°F), while September peaks at 34°C (93°F). Notably, September sees more precipitation, with 127 mm (5.0 in) over 19 days, while June records 82 mm (3.2 in) across 18 days, indicating a wetter atmosphere in September despite the marginally lower humidity level of 87% compared to June’s 84%. For more specific information about the weather during this time, you can check out Coimbatore weather in June.
In comparing the weather between September and July, we see that both months share similar temperature ranges, with July slightly edging out with a minimum temperature of 21°C (71°F) compared to September's 22°C (71°F). Both months have an average temperature of 26°C (79°F) and a maximum of 34°C (93°F). Precipitation levels are also quite close, with September experiencing 127 mm (5.0 in) over 19 days, while July has 124 mm (4.9 in) over 18 days. Humidity remains constant at 87% for both months, ensuring a tropical feel throughout. For more details, you can check Coimbatore weather in July.
In comparing the weather of September and August, we see a slight increase in average temperatures in September, with the average reaching 26°C (79°F) compared to August's 25°C (78°F). Both months feature similar minimum temperatures, with lows of 22°C (71°F), while September exhibits a higher maximum temperature of 34°C (93°F), surpassing August's peak of 32°C (91°F). Precipitation is somewhat lower in September at 127 mm (5.0 in) over 19 days, compared to August's 157 mm (6.2 in) across 20 days. Humidity remains consistent in both months at 87%. For more details, check Coimbatore weather in August.
September and October show noticeable similarities in temperature, with both months recording an average of 26°C (79°F) and maximum values reaching 34°C (93°F). However, September tends to be slightly warmer at night, with a minimum of 22°C (71°F) compared to October's 21°C (69°F). Precipitation significantly increases in October, rising to 184 mm (7.2 in) over 22 days, while September experiences 127 mm (5.0 in) over 19 days. Additionally, humidity levels drop slightly from 87% in September to 84% in October, indicating a marginally drier atmosphere in the latter month. For more detailed insights, you can check Coimbatore weather in October.
September and November showcase similar temperature ranges, with both months averaging around 26°C (79°F) and peaking at 34°C (93°F). However, September tends to be slightly warmer at night with a minimum temperature of 22°C (71°F) compared to November's 20°C (67°F). In terms of precipitation, November sees a slight increase with 135 mm (5.3 in) of rainfall over 21 days, while September has 127 mm (5.0 in) spread across 19 days. Additionally, humidity levels are marginally lower in November at 82%, compared to September's 87%. For more details on November weather, you can check Coimbatore weather in November.
September and December exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 22°C (71°F) to a maximum of 34°C (93°F), with an average of 26°C (79°F). This month also experiences substantial rainfall, with 127 mm (5.0 in) of precipitation over 19 days, contributing to a high humidity level of 87%. In contrast, December presents slightly cooler temperatures, with a minimum of 19°C (67°F) and a maximum of 33°C (91°F), averaging 24°C (76°F). The month sees reduced precipitation of 77 mm (3.0 in) over just 9 days, along with lower humidity at 76%. For a more detailed view of weather conditions, refer to Coimbatore weather in December.
As September arrives in Coimbatore, it marks a distinct transition in the weather patterns compared to the preceding months. With an average temperature hovering around a comfortable 26°C (79°F), the days are pleasantly warm, yet the frequent rains add a refreshing chill to the evenings. This month is characterized by significant rainfall, with nearly 19 days witnessing precipitation, contributing to the region's lush greenery. The high humidity levels at 87% can make the air feel quite heavy, creating a unique atmosphere that sets September apart from the drier months of the year. For those looking to understand more about the climate in Coimbatore, be sure to explore Coimbatore Climate for a deeper insight.