Last updated: August 21, 2025
In September, New Delhi experiences a transition from the sweltering summer heat to the cooler autumn months. With a maximum temperature soaring to 38°C (100°F) and an average temperature settling at a comfortable 29°C (85°F), this month presents a blend of warmth and humidity. The minimum temperature dips to a pleasant 21°C (70°F), offering reprieve during the nights. Rainfall is also prominent, with a total precipitation of 147 mm (5.8 inches) spread over approximately 13 days, contributing to a high humidity level of 87%. As the city welcomes the monsoon season, vibrant greenery begins to thrive, making September a unique time to experience New Delhi's rich ambiance.
As summer transitions to autumn in New Delhi, September brings a notable shift in temperatures. With minimum temperatures hovering around 21°C (70°F) and averages settling at a balmy 29°C (85°F), the city feels a welcome relief from the scorching heat of the preceding months. Maximum temperatures can still reach up to 38°C (100°F), ensuring that warmth lingers in the air. This month serves as a bridge between the sweltering summer and the cooler autumn, making it an ideal time for outdoor activities as humidity levels gradually decrease. Overall, September encapsulates a delightful blend of warmth and breezy comfort, setting the perfect stage for the vibrant festivals that follow.
September in New Delhi marks a significant transition in the monsoon season, characterized by 147 mm (5.8 in) of precipitation over 13 days. As the city emerges from the peak of monsoon intensity in July and August, the rainfall in September begins to taper off, yet it still contributes notably to the cumulative total. This month’s downpours are crucial for replenishing water resources and nurturing the lush greenery that appears after the relentless heat of summer. A steady decline in precipitation from July's 209 mm (8.2 in) indicates a gradual retreat of the monsoon, setting the stage for the drier months ahead. Despite this reduction, September's showers play a vital role in maintaining the city's hydrology, bridging the gap to the cooler, dryer October.
As autumn approaches, September in New Delhi, India, showcases a significant rise in humidity, maintaining a robust 87%. Following the intense monsoon months of July and August, where humidity peaks at 70% and 89% respectively, September's moisture levels remain high but start to hint at a slight decrease in comparison to the previous month. This lingering humidity reflects the transition from the wet monsoon season to the drier months ahead, setting the stage for October's anticipated 84%. The trend highlights how New Delhi's climate shifts dramatically from the drier conditions at the start of the year, when humidity plummets to 33% in March, to the heavy moisture experienced during the summer months. As the city braves the lingering humidity, residents can look forward to the gradual relief that autumn promises.
As September rolls into New Delhi, the UV Index remains a notable 9, indicating a very high exposure risk that demands caution. While it marks a slight decrease from the extreme levels of July and August, where the UV Index peaked at 12, the need for sun protection persists, with an estimated burn time of 15 minutes for unprotected skin. This month serves as a reminder that, although the scorching summer days are fading, the sun's intensity can still pose risks during mid-season transitions. As daylight gradually dims in October, the UV Index will continue to trend downwards to 8, but for now, staying vigilant is key. For more insights on seasonal UV patterns, check out the comprehensive New Delhi UV Index.
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September in New Delhi, India, ushers in a warm transition from the monsoon season, contributing to a delightful 305 hours of sunshine. This marks a slight decrease from the sun-drenched days of May, which basked in 364 hours, yet remains a vibrant month for outdoor enthusiasts. Following the patterns of the year, September’s sunlight is part of a gradual easing trend as the city moves towards the cooler months, particularly notable when compared to the peak of April and May. As the days begin to shorten, the allure of the early autumn sun encourages both locals and visitors to embrace the outdoors, making the most of the lingering warmth before the milder temperatures of October roll in. The consistent sunlight hours throughout the year reflect the resilient charm of New Delhi's climate, enticing everyone to revel in its ever-changing beauty.
September in New Delhi ushers in a transitional phase as the monsoon begins to recede, but the likelihood of sunny weather remains modest at 47%. This marks a notable drop compared to the earlier months; for instance, January boasts a 75% chance of sunshine, while October soars to an impressive 89%. After the sweltering heat of summer, the city experiences fluctuating weather patterns, with cloud cover still lingering in early September. As the month progresses, the sun gradually reasserts itself, paving the way for clearer skies and more pleasant temperatures. Thus, while September may offer only a fair share of sunshine, it signals the end of the rains and hints at the brighter days ahead.
As September arrives in New Delhi, daylight begins to wane slightly, offering 12 hours of sunshine—a gentle transition from the longer days of summer. The month follows a peak in daylight duration during May through August, when sunlit hours reach an invigorating 13 hours. This gradual decrease continues into October and November, ultimately leading to the shorter daylight of winter months, where January and December return to 10 hours. The shifting patterns of daylight reflect the rhythmic dance of seasons, inviting residents to embrace the lingering warmth of early autumn before cooler days take hold.
As September arrives in New Delhi, the wind begins to whisper a gentle promise of change, with an average wind speed of 2.3 m/s (5 mph). This slight dip from the summer's prevailing breezes hints at the transition from the monsoon season, as the city prepares to embrace the cooler months ahead. Notably, September's winds are reminiscent of those in August and mirror the calmness seen in October, suggesting a period of stability in the air after the turbulence of summer rain. As the days begin to shorten, the soft rustling of leaves foreshadows the approach of autumn, inviting residents to enjoy the delightful interplay of light and air in this vibrant metropolis.
Weather in New Delhi varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in New Delhi, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather. In September, temperatures soar with a minimum of 21°C (70°F) and an average of 29°C (85°F), peaking at a sweltering 38°C (100°F). The month is also characterized by high humidity at 87% and significant rainfall, averaging 147 mm (5.8 in) over 13 days. In sharp contrast, January brings a much cooler climate, with temperatures ranging from a low of 2°C (36°F) to a maximum of 26°C (79°F) and an average of 13°C (56°F). This month is relatively dry, experiencing just 42 mm (1.7 in) of precipitation over 3 days, and boasts a lower humidity of 53%. For more details on January weather, you can check out New Delhi weather in January.
September and February display stark contrasts in weather. September boasts a warm climate with average temperatures reaching 29°C (85°F) and peaks of up to 38°C (100°F), accompanied by high humidity levels of 87%. Rainfall is frequent, occurring on 13 days and totaling 147 mm (5.8 in), creating a rather wet atmosphere. In contrast, February offers a much cooler experience, with average temperatures around 17°C (62°F) and maximums of 32°C (90°F). This month sees significantly less precipitation, with just 34 mm (1.3 in) likely to fall over only 2 days and lower humidity at 46%. For more details about the weather in February, check out New Delhi weather in February.
In September, the weather is characterized by high temperatures, with an average of 29°C (85°F) and peaks reaching up to 38°C (100°F), while the minimum temperature hovers around 21°C (70°F). This month also experiences significant rainfall, with about 147 mm (5.8 in) of precipitation over 13 days, contributing to elevated humidity levels at 87%. In contrast, March presents a much cooler climate, offering a minimum temperature of 8°C (47°F) and an average of 22°C (73°F), soaring to a maximum of 39°C (102°F). Precipitation is minimal in March, totaling just 34 mm (1.3 in) over 5 days, and the lower humidity of 33% creates a more comfortable atmosphere. For more information on March weather, you can visit New Delhi weather in March.
In comparing the weather of September and April, notable differences emerge. September experiences milder temperatures with a minimum of 21°C (70°F) and a maximum of 38°C (100°F), while April can see extreme highs reaching up to 44°C (111°F), although it has a lower minimum of 16°C (61°F). Additionally, September is characterized by significantly higher precipitation levels, totaling 147 mm (5.8 in) across 13 days, resulting in a humidity of 87%. In contrast, April is much drier, with only 15 mm (0.6 in) of rainfall over just 3 days and a much more comfortable humidity level of 24%. For a detailed look at the weather in April, you can visit New Delhi weather in April.
September weather in New Delhi features a minimum temperature of 21°C (70°F) and an average of 29°C (85°F), with highs reaching up to 38°C (100°F). This month experiences substantial rainfall, with 147 mm (5.8 in) of precipitation over 13 days, resulting in high humidity levels of 87%. In contrast, May offers warmer conditions with minimum temperatures around 20°C (69°F) and an average high of 32°C (90°F), peaking at a scorching 45°C (113°F). Rainfall is minimal in May, with only 32 mm (1.3 in) over just 5 days and significantly lower humidity at 27%. For more details on May weather in New Delhi, check out New Delhi weather in May.
September and June present contrasting weather patterns in terms of temperature, precipitation, and humidity. In September, the temperatures hover between a minimum of 21°C (70°F) and a maximum of 38°C (100°F), with an average of 29°C (85°F). Additionally, September sees significant rainfall, totaling 147 mm (5.8 in) over approximately 13 days, accompanied by high humidity levels at 87%. In contrast, June is markedly hotter, with temperatures ranging from a minimum of 22°C (71°F) to a scorching maximum of 45°C (112°F) and an average of 33°C (91°F). This month experiences much less precipitation, with only 50 mm (2.0 in) falling over 8 days and significantly lower humidity at 31%. For a detailed look at June’s climate, you can visit New Delhi weather in June.
In comparing the weather of September and July, September tends to be slightly cooler, with an average temperature of 29°C (85°F) compared to July's higher average of 31°C (88°F). While September has a minimum temperature of 21°C (70°F), July starts at a warmer 25°C (76°F). However, July experiences more extreme maximum temperatures, reaching up to 42°C (109°F) versus September's peak of 38°C (100°F). Additionally, July sees more precipitation, with 209 mm (8.2 in) falling over 20 days, compared to September's 147 mm (5.8 in) over 13 days, indicating a wetter month overall. Humidity levels are also notable, with September being more humid at 87% compared to July's 70%. For more specific insights into July's weather patterns, you can check New Delhi weather in July.
In comparing the weather between September and August, September showcases slightly lower temperatures, with a minimum of 21°C (70°F) and an average of 29°C (85°F), compared to August's minimum of 25°C (77°F) and average of 30°C (86°F). The maximum temperatures are also comparable, peaking at 38°C (100°F) in September and 37°C (99°F) in August. However, September experiences more precipitation, with 147 mm (5.8 in) falling over 13 days, while August sees 175 mm (6.9 in) over 20 days. Both months have high humidity levels, with September at 87% and August slightly higher at 89%. For a detailed look at August weather in New Delhi, visit New Delhi weather in August.
September weather is characterized by high temperatures, with minimums around 21°C (70°F) and maximums reaching up to 38°C (100°F), creating an average of 29°C (85°F). The month is also marked by significant rainfall, totaling 147 mm (5.8 in) over 13 days, accompanied by high humidity levels of 87%. In contrast, October brings a noticeable shift in conditions. The temperatures drop, with minimums of 13°C (56°F) and average highs of 26°C (78°F), peaking at 36°C (97°F). Rainfall decreases dramatically to just 18 mm (0.7 in) over only 2 days, and humidity levels remain slightly lower at 84%. For more detailed insights, check out New Delhi weather in October.
September and November present contrasting weather patterns. In September, temperatures range from a warm minimum of 21°C (70°F) to a scorching maximum of 38°C (100°F) with an average temperature of 29°C (85°F). This month also experiences significant rainfall, totaling 147 mm (5.8 in) over 13 days, coupled with high humidity at 87%. In stark contrast, November features much cooler conditions, with temperatures ranging from a minimum of 8°C (48°F) to a maximum of 32°C (89°F), and an average of 20°C (67°F). Additionally, November boasts a much drier climate with only 11 mm (0.4 in) of precipitation over just 1 day and slightly lower humidity at 81%. For detailed insights about November weather, check out New Delhi weather in November.
In September, the weather is characterized by warm temperatures, with daily averages reaching up to 29°C (85°F) and highs soaring to 38°C (100°F), while the humidity remains high at 87%. This month also brings considerable rainfall, with 147 mm (5.8 in) of precipitation over 13 days, making it quite humid and wet. In contrast, December experiences a significant chill, with average temperatures dropping to around 14°C (58°F), and daytime highs reaching only 27°C (81°F). Precipitation levels plummet to just 9 mm (0.3 in) over a mere 1 day, resulting in drier conditions and slightly lower humidity at 76%. For more insight into December weather patterns, check out New Delhi weather in December.
As September unfolds in New Delhi, it marks a transition from the sweltering summer to the more temperate embrace of autumn. The air remains thick with humidity, often reaching an average of 87%, making it feel warmer than the already high temperatures. With maximums still flirting with the 38°C (100°F) mark, the month experiences a notable dip in average daily highs, offering some relief. Rainfall becomes a recurring theme as the city receives about 147 mm (5.8 in) of precipitation over approximately 13 days, signaling the tail end of the monsoon season. This blend of warmth and rain sets September apart, bringing lush greenery and refreshing cool spells. For more insights into the shifting weather patterns, explore New Delhi Climate.