Last updated: August 21, 2025
In Mettur, India, September marks a transition into the rainy season, characterized by an average temperature of 27°C (81°F). Daily highs reach up to 35°C (96°F), while nighttime lows dip to around 22°C (72°F). This month witnesses significant precipitation, totaling 185 mm (7.3 in) over approximately 21 days, contributing to a humidity level of 76%. The combination of warm temperatures and frequent rain creates a lush, vibrant landscape, making September a dynamic month in this region.
In September, Mettur experiences a gentle transition as temperatures begin to cool slightly from the intense summer heat. With a minimum temperature of 22°C (72°F) and a maximum of 35°C (96°F), this month marks a subtle shift towards more comfortable conditions. The average temperature hovers around 27°C (81°F), providing a pleasant balance for outdoor activities. While the heat persists, the gradual decline in maximum temperatures hints at the approaching relief of autumn. September serves as a sweet spot in Mettur’s climate, where the lingering warmth of summer meets the refreshing promise of fall.
In September, Mettur, India, experiences a significant surge in rainfall, with 185 mm (7.3 in) of precipitation recorded over 21 days. This marks the peak of the monsoon season and represents a striking increase compared to the preceding months, especially when juxtaposed with the 133 mm in August. The steady rise in precipitation since May showcases the region's transition into its wettest season, culminating in September’s abundant rains that nourish the landscape. Following September, rainfall begins to gradually decrease, with October still retaining a substantial 171 mm, confirming the lingering effects of the monsoon. Overall, these trends reflect the critical role of September as a pivotal month for rejuvenating the environment and supporting agriculture in Mettur.
September in Mettur, India, brings a noticeable increase in humidity, reaching 76%—one of the highest levels for the year. This rise follows the slightly lower humidity percentages of the summer months, with August at 69% and July at 64%. As the monsoon season transitions from its peak, this elevated humidity sets the stage for the wetter months ahead, with October and November averaging 87% and 88% respectively. The trend clearly indicates that Mettur experiences its most humid conditions in the later part of the year, creating a distinctly tropical atmosphere as the city moves into fall. Such fluctuations in humidity not only affect the climate but also have implications for local agriculture and daily life, as residents adapt to the increasingly moist air.
In September, Mettur experiences a UV Index of 13, categorized as extreme, with a burn time of just 10 minutes. This marks a slight decrease from the intense UV levels of August, which reached a peak of 14, yet continues to demand caution under the sun. The trend throughout the months reveals a consistent pattern of high UV exposure, especially from February to August, where values remain largely within the extreme range. As we transition from the peak summer months toward the end of the year, it’s crucial for residents and visitors alike to stay informed and take necessary precautions to protect themselves from harmful UV rays. For more details on seasonal variations, check the comprehensive Mettur UV Index.
UV Risk Categories
September in Mettur, India, embraces a gentle transition as the monsoon begins to recede, offering a respectable 294 hours of sunshine. This marks a slight dip from the vibrant summer months, particularly from May and March when the sun shone for an impressive 344 and 344 hours, respectively. Throughout the year, Mettur's sunlight hours display a notable upward trend from January to March, peaking in the warmth of late spring. However, as the year progresses, the daylight begins to wane gradually, with September reflecting the start of this decline. Despite this shift, September remains a delightful time, capturing the last golden rays of summer while ushering in the refreshing rhythm of autumn.
In September, the likelihood of sunny weather in Mettur, India is notably low, with only a 14% chance of sunshine. This reflects a declining trend from the more favorable conditions of earlier months such as March (77%) and February (69%), where bright days dominate. As the monsoon season approaches, the chances of sunshine diminish further, peaking with a mere 11% in August and then stabilizing at the same rate into October. Consequently, those hoping for clear skies in September may find themselves faced with persistent cloud cover, underscoring the transition into a wetter period.
In September, Mettur, India enjoys a consistent daylight duration of 12 hours, mirroring the trend established in the preceding months from March through August. This balance of light serves as a gentle transition from the longer days of summer towards the shorter daytime hours of the upcoming months. Notably, the daylight duration remains steadfast at 12 hours for an extended period, offering residents ample time to bask in the warm, golden hues that characterize this season. As the year progresses into October, daylight will gradually decrease, but September stands as a vibrant reminder of the lingering warmth of summer.
As September arrives in Mettur, India, the gentle winds continue to flow with an average speed of 1.5 m/s (3 mph), echoing the calmness of the transitional season. Following a slight increase in wind speed during the monsoon months of June and July, when breezes reached 1.9 m/s (4 mph), the winds retreat to more tranquil levels, reminiscent of earlier months like January. This consistent pattern highlights a gentle decline in wind intensity through late summer into autumn, creating a serene atmosphere that beautifully complements the region's lush landscapes. As October approaches, the breezes are expected to ease further, settling into one of the calmest periods of the year with an average of 1.1 m/s (2 mph), inviting moments of reflection amidst the shifting seasons.
Weather in Mettur varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Mettur, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January exhibit distinct weather patterns, making each month unique in its own right. In September, temperatures typically range from a minimum of 22°C (72°F) to a maximum of 35°C (96°F), with an average of 27°C (81°F). This month is marked by high humidity at 76% and significant rainfall, totaling 185 mm (7.3 in) over approximately 21 days. In contrast, January presents a cooler climate, with temperatures ranging from a minimum of 17°C (64°F) to a maximum of 32°C (91°F), and an average of 25°C (76°F). The precipitation drastically reduces to just 22 mm (0.9 in) over about 4 days, accompanied by slightly lower humidity at 72%. For more detailed insights into the January weather, you can check Mettur weather in January.
In September, the weather is typically warmer and more humid, with temperatures ranging from a minimum of 22°C (72°F) to a maximum of 35°C (96°F) and an average of 27°C (81°F). This month is also characterized by significant rainfall, with around 185 mm (7.3 in) of precipitation falling over 21 days, leading to a humidity level of 76%.
In contrast, February generally offers milder and drier conditions. The temperatures range from a minimum of 17°C (63°F) to a peak of 36°C (97°F), with an average of 26°C (79°F). Precipitation is minimal in February, with only about 8 mm (0.3 in) occurring over just one day, resulting in a lower humidity level of 62%. For more details on February weather, you can visit Mettur weather in February.
September and March exhibit notable differences in weather patterns. In September, the temperatures range from a minimum of 22°C (72°F) to a maximum of 35°C (96°F), accompanied by a high humidity level of 76% and substantial rainfall of 185 mm (7.3 in) over 21 days. In contrast, March features slightly cooler minimum temperatures at 19°C (67°F) but higher maximum temperatures reaching up to 38°C (100°F). Additionally, March is significantly drier, with just 13 mm (0.5 in) of precipitation over only 3 days and lower humidity at 57%. For a detailed look at the weather in Mettur during this month, you can check Mettur weather in March.
In comparing the weather between September and April, September is characterized by warm temperatures with an average of 27°C (81°F) and a maximum reaching up to 35°C (96°F). However, it also experiences significant rainfall, with around 185 mm (7.3 in) over 21 days, contributing to a humidity level of 76%. In contrast, April sees slightly warmer average temperatures at 30°C (87°F) and can peak at a scorching 39°C (102°F). The month is much drier, with only 20 mm (0.8 in) of precipitation over just 4 days, resulting in a lower humidity of 56%. For more specifics on April weather, you can refer to Mettur weather in April.
When comparing the weather in September and May, notable differences emerge. September boasts a more moderate average temperature of 27°C (81°F), with highs reaching up to 35°C (96°F), while May experiences temperatures that can soar to a maximum of 39°C (103°F), with an average of 30°C (86°F). Additionally, September is significantly wetter, receiving 185 mm (7.3 in) of precipitation over 21 days, compared to May's 82 mm (3.2 in) over 14 days. Furthermore, the humidity in September is higher at 76%, while May exhibits a lower humidity level of 64%. These contrasts showcase the transitional weather patterns of the two months. For more details on May's climate, you can check Mettur weather in May.
In comparing the weather between September and June, we see some notable differences. September features a slightly lower minimum temperature of 22°C (72°F) compared to June's 23°C (74°F), and while the average temperature is similar, June can reach a higher maximum of 37°C (100°F) versus September's peak of 35°C (96°F). Additionally, September is marked by significantly higher precipitation at 185 mm (7.3 in) over 21 days, while June has only 107 mm (4.2 in) over 19 days. Humidity levels in September are slightly higher at 76%, compared to 71% in June. For more detailed insights on June weather, you can check Mettur weather in June.
In comparing the weather between September and July, September exhibits slightly cooler temperatures, with an average of 27°C (81°F) compared to July's 28°C (82°F). Notably, September experiences more rainfall, totaling 185 mm (7.3 in) across 21 days, while July sees less precipitation at 119 mm (4.7 in) over 18 days. Additionally, humidity levels are higher in September at 76%, in contrast to July's 64%, making September feel more muggy than the warmer, drier conditions of July. For a detailed look at July's weather pattern, you can refer to Mettur weather in July.
In comparing the weather of September to that of August, we see a slight shift in temperature and precipitation patterns. September experiences a minimum temperature of 22°C (72°F), slightly lower than August's 23°C (73°F), while maintaining an average of 27°C (81°F) for both months. The maximum temperature in September reaches 35°C (96°F), just a degree cooler than August’s peak of 36°C (97°F). However, September is notably wetter, receiving 185 mm (7.3 in) of precipitation over 21 days compared to August's 133 mm (5.2 in) over 20 days. Additionally, humidity levels rise in September to 76%, up from 69% in August. For more details, you can refer to Mettur weather in August.
In September, the weather tends to be quite warm with an average temperature of around 27°C (81°F), reaching highs of 35°C (96°F). This month also experiences a significant amount of rainfall, totaling 185 mm (7.3 in) over 21 days, coupled with a humidity level of 76%. In contrast, October shows a slight decrease in maximum temperatures, peaking at 34°C (93°F), while the average remains similar at 27°C (80°F). Interestingly, the overall precipitation decreases to 171 mm (6.7 in), although the number of rainy days remains consistent at 21. Additionally, October sees a rise in humidity to 87%, creating a muggy atmosphere. For more detailed information, you can check Mettur weather in October.
September and November present some noticeable differences in weather patterns. September boasts higher temperatures, with averages reaching 27°C (81°F) and maximums climbing to 35°C (96°F), while November experiences slightly cooler temperatures, averaging 26°C (79°F) and peaking at 33°C (92°F). Additionally, September sees more rainfall, totaling 185 mm (7.3 in) over 21 days, compared to November's 134 mm (5.3 in) over 17 days. Humidity levels also rise in November, reaching 88%, compared to September’s 76%. For a more detailed look at November weather, you can visit Mettur weather in November.
In September, the weather is typically warmer, with daily temperatures ranging from a minimum of 22°C (72°F) to a maximum of 35°C (96°F) and an average of 27°C (81°F). The month is characterized by high humidity at 76% and significant rainfall, with 185 mm (7.3 in) of precipitation spread over 21 days. In contrast, December experiences slightly cooler temperatures, with a minimum of 19°C (66°F) and a maximum of 33°C (91°F), averaging at 25°C (77°F). The month is also much drier, receiving only 64 mm (2.5 in) of rain over just 8 days and featuring higher humidity at 83%. For more details about December weather specifics, you can visit Mettur weather in December.
As we delve into September weather in Mettur, we notice a significant shift from the hot summer months. While temperatures remain comfortably warm, with averages around 27°C (81°F), the onset of the monsoon brings increased humidity and a marked rise in precipitation, with nearly three weeks of rain this month. The 185 mm of rainfall, spread across 21 days, transforms the landscape, contributing to lush greenery and revitalizing the region. This blend of warmth and moisture sets September apart, offering a refreshing contrast to the dry heat experienced earlier in the year. For more insights, visit Mettur Climate.