Last updated: August 21, 2025
September in Mumbai, India, is characterized by a tropical monsoon climate, with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 32°C (90°F), resulting in an average temperature of 27°C (81°F). This month is marked by substantial rainfall, accumulating to 476 mm (18.7 in) over about 27 days, creating a lush and vibrant atmosphere. The high humidity of 88% can make the air feel heavy, but it also contributes to the city's unique charm. Overall, September is a time of transformation for Mumbai, as it transitions from the sweltering summer to a more refreshing climate.
September in Mumbai marks the tail end of the monsoon season, with temperatures starting to settle as the city prepares for the transition to autumn. The average temperature hovers around 27°C (81°F), with nighttime lows of 24°C (75°F) providing a comfortable reprieve from the day’s warmth, which peaks at a maximum of 32°C (90°F). This month witnesses a slight dip in average temperatures compared to the sweltering heights of summer, creating a pleasant atmosphere for both locals and visitors. As the humidity remains, the city's vibrant life continues to pulse, highlighting Mumbai's resilience and charm even as it transitions between seasons. The overall trend shows a gradual cooling as October approaches, making September a delightful time to experience the city's unique blend of culture and climate.
September in Mumbai marks a significant transition in the monsoon season, with the city receiving 476 mm (18.7 in) of precipitation over 27 days. This substantial rainfall is part of a pattern that peaks in the preceding months, notably July and August, which together contribute over 1,250 mm of rain. As the monsoon begins to wane, September typically witnesses a slight decrease in intensity compared to the torrential downpours earlier in the season. However, the persistent rains during this month continue to nourish the vibrant ecosystems of the city, while also illustrating the heavy reliance on these monsoon months for Mumbai's annual water supply. By the time October arrives, the rainfall sharply declines, returning to much lower levels, making September a crucial bridge between the heights of the monsoon and the drier months ahead.
September in Mumbai marks a transition as the monsoon season begins to wane. With an average humidity of 88%, the city still experiences significant moisture in the air, although it slightly dips from the peak of 92% recorded in August. This trend reveals a gradual decrease in humidity from the torrid July and August months, which are characterized by heavy rainfall. Despite this slight respite, September's humidity remains high, painting a picture of a tropical climate that is both vibrant and challenging. As the year progresses, October will bring further reduction, but for now, the lingering humidity continues to shape Mumbai's urban landscape and the day-to-day experiences of its residents.
In September, Mumbai experiences an UV Index of 11, categorizing it as extreme where the potential for harm from unprotected sun exposure is significant. Despite a slight decrease from the peak summer months of July and August, the burn time remains a brisk 10 minutes, urging residents and visitors to be vigilant. This trend in the UV Index highlights the importance of protective measures, as the city transitions from the intense summer rays. As we move into the post-monsoon period, it's crucial to maintain awareness of UV levels to safeguard skin health. For more details on Mumbai's UV Index throughout the year, visit Mumbai UV Index.
UV Risk Categories
September in Mumbai ushers in a warm embrace of sunshine, showcasing 266 hours of radiant daylight. As the monsoon season begins to wane, the city enjoys a welcomed transition with steeper sunshine hours compared to the preceding months of July and August, which both lingered under the clouds with just over 200 hours each. This slight uptick is a precursor to the sunnier days of October and November, where sunshine hours soar to around 310 and 306 hours respectively. The overall trend reflects the city's journey from the heavy rains of mid-year towards the bright and vibrant fall season, making September a delightful bridge back to sunshine.
September in Mumbai marks a transition toward clearer skies, but the likelihood of sunny weather remains modest, with only a 12% chance of sunshine. This follows a monsoon-drenched period in July and August, where the sun makes fleeting appearances. The city's weather begins to turn in October, climbing to 58%, signaling a welcome return of brightness after the rain. Overall, September's overcast skies are part of a natural rhythm, highlighting the city's resilience and adaptation as it eagerly anticipates the sunnier days ahead. While not a haven for sun-seekers, this month serves as a crucial bridge in Mumbai's climatic tapestry.
As September rolls into Mumbai, the city basks in 12 hours of daylight, maintaining the steady glow that characterizes the monsoon season. Following a peak of 13 hours in the sweltering months of May through August, the gradual transition back to shorter days begins, reflecting the shift toward the cooler, more temperate months ahead. This trend reveals a rhythmic pattern in Mumbai's daylight hours, with the brightness of summer giving way to the gentle dimming typical of autumn. As the year progresses, daylight diminishes toward 10 hours in December, demonstrating the city’s vibrant seasonal ebb and flow.
As September unfolds in Mumbai, the average wind speed peaks at 3.9 m/s (9 mph), marking a noticeable transition from the heavy monsoon months of July and August. Following a steady climb throughout the summer, where winds reached their highest at 4.6 m/s (10 mph) in July, September brings a gentle reprieve, as the city feels the playful caress of the wind. This month signifies a shift; the winds begin to soften in anticipation of October's cooler, more tranquil breezes at 2.4 m/s (5 mph). Yet, the lingering warmth of the monsoon is still present, making September a unique blend of vibrant energy and calming currents as the city prepares for the change of seasons.
Weather in Mumbai varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Mumbai, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present strikingly different weather patterns. September experiences higher temperatures, with averages around 27°C (81°F) and peaks reaching up to 32°C (90°F), while humidity levels soar to 88%. This month is also characterized by significant rainfall, totaling 476 mm (18.7 in) over 27 days. In contrast, January boasts milder conditions, with minimum temperatures dropping to 15°C (59°F) and averages around 24°C (75°F). Precipitation is virtually nonexistent, totaling just 1 mm (0.0 in) over the month, and the humidity decreases to a more comfortable 53%. For a detailed look at the January weather in Mumbai, you can refer to Mumbai weather in January.
September and February present distinct contrasts in weather. In September, temperatures range from a minimum of 24°C (75°F) to a maximum of 32°C (90°F), with an average of 27°C (81°F). This month is characterized by heavy rainfall, receiving 476 mm (18.7 in) over 27 days, and high humidity levels at 88%. In stark contrast, February features milder temperatures, with a minimum of 14°C (58°F), an average of 25°C (77°F), and a maximum of 34°C (94°F). Remarkably, February experiences no precipitation, providing dry conditions with a humidity level of 41%. For a more detailed look at February's weather, you can visit Mumbai weather in February.
September and March present contrasting weather conditions. In September, temperatures range from a minimum of 24°C (75°F) to a maximum of 32°C (90°F) with an average of 27°C (81°F), accompanied by significant rainfall totaling 476 mm (18.7 in) over 27 days and a high humidity level of 88%. In stark contrast, March features milder temperatures with a minimum of 19°C (66°F) and a maximum reaching 37°C (99°F), while also maintaining the same average of 27°C (81°F). Notably, March experiences no precipitation, resulting in 0 days of rain and a much lower humidity of 37%. For more detailed information, check Mumbai weather in March.
September and April showcase notable differences in weather patterns. In September, temperatures range from a minimum of 24°C (75°F) to a maximum of 32°C (90°F), with an average of 27°C (81°F). This month is marked by high humidity at 88% and significant rainfall, totaling 476 mm (18.7 in) over 27 days. In contrast, April experiences warmer conditions with temperatures ranging from a minimum of 22°C (72°F) to a maximum of 36°C (98°F), featuring an average temperature of 29°C (84°F). April is characterized by very low precipitation, with only 1 mm (0.0 in) recorded and no rainy days, along with a much lower humidity level of 38%. For more information, visit Mumbai weather in April.
In comparing the weather between September and May, September is characterized by warmer temperatures with an average around 27°C (81°F) but brings significant rainfall, totaling 476 mm (18.7 in) over 27 days, resulting in high humidity levels of 88%. In contrast, May tends to be hotter, with temperatures peaking at a maximum of 35°C (95°F) and an average of 30°C (86°F), but experiences much less precipitation at just 34 mm (1.4 in) over 3 days, leading to a more comfortable humidity level of 53%. For more detailed insights into the weather patterns, check out Mumbai weather in May.
In comparing the weather between September and June, September experiences slightly warmer average temperatures, with a minimum of 24°C (75°F) and a maximum of 32°C (90°F), while June shows a minimum of 25°C (78°F) and reaches up to 34°C (94°F). Notably, September is much wetter, receiving 476 mm (18.7 in) of precipitation over 27 days, in contrast to June's 342 mm (13.5 in) of rainfall, also spread over 27 days. Additionally, September has a higher humidity level at 88%, whereas June has a more moderate humidity at 70%. For a more detailed look at the conditions, you can check out Mumbai weather in June.
In comparing the weather of September and July, September showcases slightly cooler temperatures with a minimum of 24°C (75°F) and a maximum of 32°C (90°F), while July starts off a touch warmer with a minimum of 25°C (78°F) and a maximum of 31°C (89°F). Both months share an average temperature of 27°C (81°F). However, September experiences significantly less rainfall, with 476 mm (18.7 in) over 27 days compared to July's 652 mm (25.7 in) across 31 days, indicating that July is notably wetter. Humidity remains consistently high, with September at 88% and July slightly higher at 89%. For more detailed insights on July weather, you can check Mumbai weather in July.
In comparing the weather of September and August, we see some noticeable differences. Both months feature similar minimum temperatures, hovering around 24°C (75°F), while September tends to have a slightly warmer average of 27°C (81°F) compared to August's 27°C (80°F). The maximum temperatures are also marginally higher in September at 32°C (90°F) versus 31°C (87°F) in August. However, September experiences significantly reduced precipitation, with 476 mm (18.7 in) over 27 days compared to a more substantial 608 mm (24.0 in) on 31 days in August. This results in a decrease in humidity in September, averaging 88% compared to August's higher level of 92%. For a more detailed understanding of the conditions in August, you can refer to Mumbai weather in August.
In September, the weather tends to be quite humid and rainy, with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 32°C (90°F), coupled with significant precipitation of 476 mm (18.7 in) across 27 days. In contrast, October experiences slightly lower humidity levels at 82%, with temperatures averaging around 28°C (83°F) and reaching a maximum of 35°C (95°F). Additionally, precipitation drops significantly to 91 mm (3.6 in) over just 13 days, making October a much drier month compared to September. For more specifics on the month, you can visit Mumbai weather in October.
In September, the weather tends to be quite warm and humid, with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 32°C (90°F). The month is characterized by substantial rainfall, accumulating 476 mm (18.7 in) over 27 days, and a high humidity level of 88%. In contrast, November brings a transition toward cooler and drier conditions. The temperatures in November range from a minimum of 18°C (66°F) to a maximum of 34°C (94°F), with significantly lower precipitation of just 12 mm (0.5 in) over one day and humidity dropping to 77%. For more details, check out Mumbai weather in November.
In September, the weather is considerably warmer and more humid, with average temperatures ranging from a minimum of 24°C (75°F) to a maximum of 32°C (90°F) and an average humidity level of 88%. This month also sees significant rainfall, with precipitation totaling 476 mm (18.7 in) over 27 days, making it one of the wettest months. In contrast, December offers a more temperate climate, with temperatures dropping to a minimum of 16°C (61°F) and averaging around 25°C (77°F), while still reaching highs of 32°C (91°F). Rainfall is notably scarce in December, with only 20 mm (0.8 in) of precipitation over just 2 days, and humidity levels also decrease to 70%. For those interested in more details, you can check Mumbai weather in December.
As September rolls into Mumbai, the city transforms under the heavy embrace of humidity and persistent rainfall. With an impressive average temperature around 27°C, the month feels considerably cooler compared to the scorching heat of summer. The daily precipitation increases significantly, with nearly 27 days of rain, which nurtures the lush greenery that defines the city’s charm. This shift from the intense dryness of previous months signifies the arrival of the much-anticipated monsoon, creating a vibrant yet challenging atmosphere that’s hallmark to Mumbai. For a deeper understanding of how weather parameters vary throughout the year, explore Mumbai Climate.