Last updated: August 21, 2025
In Diamond Harbour, India, September ushers in a warm yet humid climate characterized by a maximum temperature of 35°C (95°F) and a comfortable average of 29°C (85°F). As the month progresses, the minimum temperature remains pleasant at 25°C (77°F). However, this period is also marked by significant precipitation, accumulating to 293 mm (11.5 in) over 27 rainy days, contributing to the region's lush greenery. With an average humidity level of 86%, visitors can expect a tropical atmosphere that enhances the charm of this coastal destination.
In September, Diamond Harbour welcomes the onset of autumn with mild temperatures that provide a refreshing break from the summer heat. The minimum temperature hovers around 25°C (77°F), setting a comfortable stage for the month. With an average of 29°C (85°F) and a maximum of 35°C (95°F), the weather remains warm but is slightly more bearable compared to the intense heat of July and August. This month signifies a transition where the humidity begins to wane and the cooling breezes start, making it an ideal time for outdoor activities. As the city embraces the changing season, the pleasant temperatures invite both locals and visitors to enjoy the beauty of Diamond Harbour.
In September, Diamond Harbour experiences a notable shift in precipitation patterns, with 293 mm (11.5 in) of rain falling across 27 days. This month marks a decrease from the heavy downpours of August, which saw 356 mm (14.0 in) over 30 days, hinting at a gradual transition out of the peak monsoon season. However, September remains one of the wettest months of the year, showcasing the region's susceptibility to late monsoon rainfall. As the year progresses towards October, the expected decline in both the amount and frequency of rain becomes evident, reinforcing the cyclical nature of Diamond Harbour's climate and emphasizing the month as a crucial period for water replenishment before drier conditions set in.
In September, Diamond Harbour experiences a high humidity level of 86%, a continuation of the trend established in the preceding months of July and August, where humidity peaked at similar levels. This suggests a lingering monsoon effect as the region transitions from the rain-soaked summer into the more moderate autumn months. Humidity remains elevated compared to the beginning of the year, where figures hovered around 30-55%. As the climate gradually shifts towards October, humidity begins to ease slightly to 83%, but September is firmly entrenched in the sultry embrace of the monsoon season, making it one of the most humid months of the year.
In September, Diamond Harbour experiences a notable peak in UV exposure, maintaining an extreme UV Index of 13, which requires just 10 minutes of exposure before skin damage can occur. This trend of intensifying UV levels continues from the previous months of July and August, both also recording the same index. This period highlights a critical need for sun protection, as the extreme category calls for heightened awareness for those spending time outdoors. Following this trend, October sees a slight dip to an UV Index of 11, still within the extreme range, ensuring that residents and visitors should stay vigilant. For a complete overview of UV exposure throughout the year, you can check out the Diamond Harbour UV Index.
UV Risk Categories
September brings a gentle transition in Diamond Harbour, India, with 272 hours of sunshine illuminating the landscape. While this figure marks a decline from the vibrant summer months of May and April, which basked in 345 and 330 hours respectively, it still offers a pleasant respite compared to the earlier months of the year. The sun begins to soften, setting the stage for the cooler autumns ahead, yet this month maintains a warm glow reminiscent of the sun-soaked days of summer. As the year progresses towards October, when the sunshine slightly rebounds to 289 hours, September serves as a bridge between the peak warmth of summer and the more temperate days that follow.
September in Diamond Harbour, India, marks a notable drop in the likelihood of sunny weather, with only an 8% chance of sun. This decline follows a prolonged period of significantly lower sunshine in the monsoon months of July and August, which see a mere 6% and 7% chance, respectively. As the region transitions from the heavy rains of summer, the prospects for bright days remain stubbornly dim, hinting at the tail end of the monsoon season. This trend of reduced sunshine continues into October, where the chance increases to a moderate 49%, suggesting that sunny weather is more likely to return as the month progresses. For those hoping for warm, sunny days, September may not be the ideal time to visit, as the region remains cloaked in post-monsoon clouds.
As September arrives in Diamond Harbour, India, the daylight duration settles at 12 hours, mirroring the equable conditions of both March and April. This transitional month marks a subtle shift away from the longer days of summer, which peaked at 13 hours in May through July. Following September, daylight gradually decreases, with October and November bringing 11 hours each, before the shorter days of winter set in. This rhythmic dance of daylight not only enhances the beauty of the changing seasons but also serves as a reminder of the cyclical nature of time here in this vibrant region.
In September, the winds of Diamond Harbour, India, blow gently, averaging 2.6 m/s (6 mph). While this marks a slight decrease from the summer months, the wind remains mild compared to earlier spring averages. From a low of 2.1 m/s in January and February, wind speeds gradually picked up, peaking at 3.4 m/s (8 mph) in May. This gradual climb is followed by a soft descent as summer transitions into fall, indicating a smooth shift in seasons. Overall, September's air is characterized by a tranquil breeze, perfect for those looking to enjoy the calm yet vibrant atmosphere of the coastal region. With autumn approaching, one can sense the change in the air, ushering in a new chapter in Diamond Harbour's climatic rhythm.
Weather in Diamond Harbour varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Diamond Harbour, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is warm and humid, with temperatures ranging from a minimum of 25°C (77°F) to a maximum of 35°C (95°F), alongside significant rainfall of 293 mm (11.5 in) spread over 27 days. The high humidity at 86% can make conditions feel even warmer. In contrast, January offers a much cooler climate, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 31°C (89°F). During this month, precipitation is minimal, with only 7 mm (0.3 in) and no rainy days, resulting in a more comfortable humidity level at 55%. For those interested in more details, you can check out Diamond Harbour weather in January.
September and February present contrasting weather patterns. September is characterized by warm temperatures, with a minimum of 25°C (77°F) and an average of 29°C (85°F), peaking at a high of 35°C (95°F). However, it also brings significant rainfall, averaging 293 mm (11.5 inches) over 27 days, and high humidity levels of 86%. In stark contrast, February experiences much cooler temperatures, with a minimum of 11°C (51°F), an average of 23°C (73°F), and a maximum of 35°C (96°F). Precipitation is minimal, totaling only 16 mm (0.6 inches) across a single day, and the humidity drops significantly to 45%. For a detailed look at February weather, visit Diamond Harbour weather in February.
When comparing the weather in September and March, there are notable contrasts in temperature, precipitation, and humidity. September boasts warmer temperatures, with a minimum of 25°C (77°F) and an average of 29°C (85°F), peaking at 35°C (95°F). However, it also has significantly higher rainfall, totaling 293 mm (11.5 in) over 27 days, accompanied by high humidity at 86%. In contrast, March presents a cooler climate with a minimum temperature of 16°C (61°F), an average of 27°C (81°F), and a maximum reaching 38°C (101°F). Precipitation is minimal in March, with only 46 mm (1.8 in) spread across just 6 days and lower humidity at 32%. For a detailed forecast, you can refer to Diamond Harbour weather in March.
September and April exhibit distinct weather patterns, reflecting the transition from late summer to early spring. In September, temperatures range from a minimum of 25°C (77°F) to a maximum of 35°C (95°F), with an average of 29°C (85°F). The month experiences significant rainfall, totaling 293 mm (11.5 in) over 27 days, and boasts high humidity levels at 86%. In contrast, April has warmer maximum temperatures, reaching up to 39°C (103°F), while maintaining an average of 30°C (86°F) and a lower minimum of 20°C (69°F). Precipitation in April is considerably less, at 76 mm (3.0 in) over just 10 days, accompanied by much drier air at 30% humidity. This highlights the stark difference in moisture and temperature between the two months, making April notably warmer and drier. For more details, you can check out Diamond Harbour weather in April.
When comparing the weather in September and May, we notice distinct differences in temperature and precipitation patterns. September typically experiences higher humidity at 86%, with average temperatures ranging from a minimum of 25°C (77°F) to a maximum of 35°C (95°F) and considerable rainfall of 293 mm (11.5 in) over 27 days. In contrast, May tends to be hotter with maximum temperatures reaching up to 39°C (103°F) and a lower average humidity of 56%. The rain is also less frequent in May, producing only 116 mm (4.6 in) of precipitation over 12 days. For more details on May's weather specifics, you can refer to Diamond Harbour weather in May.
When comparing the weather in September and June, we see distinct differences in both temperature and precipitation patterns. September features a slightly lower average temperature of 29°C (85°F) compared to June’s warmer average of 30°C (87°F), though June can peak much higher with maximum temperatures reaching up to 40°C (104°F). In terms of humidity, September is more humid at 86%, while June has a lower humidity level of 60%. Precipitation is noticeably higher in September, with 293 mm (11.5 in) spread over 27 days, in contrast to June's 262 mm (10.3 in) over 24 days. Overall, September tends to be warmer and wetter, while June offers intense heat with lower humidity. For more details on the June weather, you can refer to Diamond Harbour weather in June.
When comparing the weather in September to that in July, both months exhibit warm temperatures, but July is generally hotter, with average temperatures peaking at 30°C (85°F) compared to September's average of 29°C (85°F). In July, the maximum temperature can reach up to 36°C (98°F), while September sees a slightly lower maximum of 35°C (95°F). Precipitation is notably higher in July, with 335 mm (13.2 in) falling over 29 days, compared to September's 293 mm (11.5 in) over 27 days. Despite this, humidity levels are relatively similar, hovering around 86% in September and 84% in July, creating a consistently muggy atmosphere. For further details, check out Diamond Harbour weather in July.
In comparing the weather between August and September, both months exhibit similar temperature ranges, with August slightly warmer, reaching a maximum of 36°C (97°F) compared to September's peak of 35°C (95°F). Humidity levels remain consistent at 86% for both months, contributing to a tropical feel. However, September experiences a slight decrease in precipitation, recording 293 mm (11.5 in) over 27 days, while August sees a heavier rainfall of 356 mm (14.0 in) across 30 days. For more specifics on the weather patterns in August, you can refer to this link: Diamond Harbour weather in August.
In September, the weather is characterized by higher temperatures, with minimums around 25°C (77°F) and an average of 29°C (85°F), peaking at 35°C (95°F). Additionally, this month experiences significant precipitation of 293 mm (11.5 in) over 27 days, contributing to a high humidity level of 86%. In contrast, October sees a slight drop in minimum temperatures to about 20°C (69°F) and a similar average of 28°C (83°F), with maximums reaching up to 36°C (97°F). Precipitation also decreases to 183 mm (7.2 in) over 17 days, resulting in a slightly lower humidity of 83%. For a closer look at the weather specifics in October, you can visit Diamond Harbour weather in October.
In September, the weather is considerably warmer and more humid, with temperatures ranging from a minimum of 25°C (77°F) to a maximum of 35°C (95°F) and an average of 29°C (85°F). This month also experiences significant rainfall, totaling 293 mm (11.5 inches) over 27 days, contributing to a high humidity level of 86%.
In contrast, November sees a notable drop in temperature, with a minimum of 14°C (57°F), an average of 24°C (76°F), and a maximum of 33°C (92°F). Precipitation decreases dramatically to 64 mm (2.5 inches) over just 3 days, and humidity drops to a more comfortable 73%. For those interested in detailed weather patterns, you can find more information at Diamond Harbour weather in November.
September and December present stark contrasts in weather. In September, temperatures range from a warm minimum of 25°C (77°F) to a scorching maximum of 35°C (95°F), with an average of 29°C (85°F). The month is characterized by high humidity at 86% and frequent rainfall, accumulating 293 mm (11.5 in) over 27 days. In contrast, December brings much cooler temperatures, with a minimum of 11°C (51°F), an average of 20°C (68°F), and a maximum of 30°C (87°F). Additionally, precipitation drops significantly to just 40 mm (1.6 in) over only 2 days, and humidity decreases to 69%. For more details, you can visit Diamond Harbour weather in December.
As September unfolds in Diamond Harbour, it brings a distinct shift in weather patterns compared to the preceding months. With high humidity levels hovering around 86%, the air feels more tropical, while daily temperatures average a comfortable 29°C (85°F), punctuated by occasional peaks reaching 35°C (95°F). However, September is also marked by frequent rainfall, as the region experiences 27 days of precipitation, accumulating 293 mm (11.5 in), making it one of the wettest months of the year. This combination of warmth and moisture creates a lush, vibrant landscape, inviting both locals and visitors to enjoy the tropical climate. For more insights on the weather throughout the year, explore the Diamond Harbour Climate.