Last updated: August 21, 2025
September in Itanagar, India, showcases a vibrant interplay of warm temperatures and monsoon showers. With maximum highs reaching 35°C (95°F) and an average temperature of 27°C (80°F), the days can be sweltering, while evenings cool down to a minimum of 21°C (71°F). This month brings significant rainfall, totaling 192 mm (7.5 in) over 22 days, contributing to the region's lush greenery. The humidity is notably high at 91%, creating a steamy atmosphere that characterizes the transitioning weather patterns of the monsoon season. Embrace the dynamic climate as Itanagar experiences the rich diversity of nature in September.
In September, Itanagar experiences a transition that marks the end of the monsoon season, bringing a refreshing climate. With minimum temperatures around 21°C (71°F) and an average of 27°C (80°F), the city maintains a tropical warmth, while the maximum seldom exceeds 35°C (95°F). This month mirrors the warmth of August, yet hints at the approaching cooler days of October. The drop in early morning lows suggests a slight respite from the summer heat, making it an inviting time for outdoor activities amidst lush landscapes revitalized by the monsoon rains. Overall, September offers a pleasant blend of balmy temperatures and the promise of autumn's cooler embrace, epitomizing a vibrant yet serene atmosphere.
In September, Itanagar experiences a notable transition as the monsoon season begins to wane, with precipitation measuring 192 mm (7.5 in) over the month. This is a decrease from the substantial rainfall of June and July, which see the heaviest showers, and marks a shift towards drier conditions typical of the upcoming months. Rainfall occurs across 22 days, reflecting a pattern where shorter, more consistent bouts of rain provide relief from the peak monsoon intensity. As the month progresses, the gradual reduction in rainfall sets the stage for the lighter precipitation in October, signaling the end of the rainy season in this lush hilly region, beautifully transitioning Itanagar into its post-monsoon climate.
In September, Itanagar experiences a high humidity level of 91%, continuing the trend set by the preceding months of July and August. This marks the peak of the monsoon season, where the air feels heavy and laden with moisture. Following the dip in humidity experienced in the warmer months of April and March, which saw figures as low as 44%, the city shifts dramatically into a wet phase. The transition from the cooler, drier months of the early year to the sultry monsoon creates a unique climate experience, characterized by both rich greenery and occasional rain showers. As September draws to a close, humidity remains elevated at 90% in October, heralding the approaching retreat of the monsoon while still enveloped in the lingering warmth of the season.
As September rolls into Itanagar, the UV Index remains notably high, peaking at 11, categorizing the exposure as extreme with a burn time of just 10 minutes. This trend showcases the sustained intensity of sunlight in the region, particularly following the peak months of July and August when the UV Index reached its maximum. With the transition from the rainy season into autumn, residents and visitors should remain vigilant about sun protection, as the risk of UV exposure remains significant. For ongoing updates, check the comprehensive information on the Itanagar UV Index.
UV Risk Categories
As September unfolds in Itanagar, a graceful transition occurs in the city's sunshine, offering 230 hours of bright, emerging daylight. Following the peak of 315 hours in March, the sunshine gradually relaxed through the sweltering months, dipping to its lowest in July at just 188 hours. Yet, September's warmth marks a resurgence, hinting at the upcoming bounty of October’s sunlit days. With hours climbed steadily in the latter half of the year, this month stands as a gentle reminder of nature's rhythms, paving the way for the vibrant hues and golden light that characterize the Indian fall. The trend indicates a balancing act as daylight continues to flourish, culminating in a dazzling finale as the year draws to a close.
In September, the likelihood of sunny weather in Itanagar, India, reaches 26%, a slight uptick from the dismal figures of the preceding months, where July and August showcase some of the lowest chances of sunshine at just 8% and 6%, respectively. This transition marks a subtle shift as the region emerges from the monsoon season, hinting at the return of clearer skies. The chance of sun begins to improve markedly in October, climbing back to 65%, which highlights September as a fleeting bridge towards more favorable weather. Despite being one of the lesser sunny months, September still offers a glimmer of hope for those seeking sunshine before the drier months set in.
As September arrives in Itanagar, India, daylight begins to shift, offering approximately 12 hours of sunshine each day. This marks a gentle decline from the long, bright days of summer, which peaked in May through August with a consistent 13 hours of daylight. The transition into autumn sees daylight gradually diminishing, mirroring the pattern of October and November, where daylight further narrows to 11 hours and then 10 hours. This rhythmic change not only highlights the dynamic nature of the seasons but also invites residents to embrace the cooler evenings and enjoy outdoor activities while they can, before the shorter days of winter settle in.
As September arrives in Itanagar, the gentle caress of the wind remains a constant companion, with an average speed of 1.2 m/s (3 mph), mirroring the stillness of the previous month. This consistency reflects a broader trend throughout the year, where wind speeds hover around the same modest pace. From the beginning of the year through August, wind speeds peaked at 1.5 m/s in August, before settling back in September. Even as autumn approaches, the subtropical climate of Itanagar experiences a mild breeze that contributes to the serene ambiance of the area. This calmness not only enhances the beauty of the landscape but also invites locals and visitors alike to enjoy the outdoors in the pleasant September air.
Weather in Itanagar varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Itanagar, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present contrasting weather patterns, highlighting the transition from the warm monsoon season to the cooler winter months. In September, average temperatures hover around 27°C (80°F), peaking at a sweltering 35°C (95°F), accompanied by high humidity at 91% and substantial rainfall of 192 mm (7.5 in) over 22 days. In stark contrast, January offers a much cooler climate with average temperatures of 16°C (60°F) and a maximum of 27°C (81°F), while only experiencing minimal precipitation of 16 mm (0.6 in) across just 3 days. This shift not only reflects a change in temperature but also a notable decrease in humidity to 77%. For more details on January weather, visit Itanagar weather in January.
September and February present distinct weather patterns. In September, temperatures range from a minimum of 21°C (71°F) to a sweltering maximum of 35°C (95°F), with an average of 27°C (80°F). The month is characterized by high humidity at 91% and significant rainfall, receiving 192 mm (7.5 in) over 22 days. In contrast, February offers a cooler climate, with temperatures dropping to a minimum of 8°C (47°F) and a maximum of 29°C (84°F), averaging around 17°C (63°F). Precipitation is much lower at 65 mm (2.6 in) occurring over just 8 days, and humidity decreases to 70%. For more detailed weather insights, you can visit Itanagar weather in February.
September and March present contrasting weather patterns. In September, temperatures typically range from a minimum of 21°C (71°F) to a maximum of 35°C (95°F), with an average temperature of 27°C (80°F). This month also experiences high humidity at 91% and significant precipitation, totaling 192 mm (7.5 in) over 22 days. In contrast, March has cooler temperatures, with a minimum of 11°C (52°F) and an average of 21°C (70°F), peaking at 35°C (94°F) similar to September. However, March sees considerably less precipitation at 98 mm (3.8 in) over just 14 days and a much lower humidity level of 51%. For more detailed weather information, you can refer to Itanagar weather in March.
When comparing the weather between September and April, it’s clear that both months share similar maximum temperatures, reaching up to 35°C (95°F). However, September tends to be much warmer overall, with average temperatures around 27°C (80°F), compared to April’s cooler average of 23°C (73°F). Additionally, September experiences significantly higher humidity levels at 91%, making it feel more oppressive, while April offers a more pleasant 44% humidity. Precipitation is also notable, with September receiving 192 mm (7.5 inches) over 22 days, slightly more than April's 175 mm (6.9 inches) over 17 days. For more detailed information on Itanagar weather in April, you can explore how the climate shifts in that month.
When comparing the weather in September and May, notable differences emerge in temperature and precipitation patterns. In September, temperatures range from a minimum of 21°C (71°F) to a maximum of 35°C (95°F), with an average of 27°C (80°F). The month sees significant rainfall, accumulating to 192 mm (7.5 in) over 22 days, contributing to a high humidity level of 91%. In contrast, May presents slightly cooler temperatures, with a minimum of 18°C (65°F) and a maximum of 34°C (93°F), averaging 24°C (76°F). However, it experiences even heavier rainfall, totaling 297 mm (11.7 in) over 23 days, and maintains a lower humidity level of 83%. For a detailed look at May’s weather, you can visit Itanagar weather in May.
In comparing the weather conditions of September and June, both months share similar minimum and average temperatures, hovering around 21°C (71°F) and 27°C (80°F) respectively. However, June typically experiences slightly higher maximum temperatures, reaching up to 37°C (98°F), compared to September's peak of 35°C (95°F). Precipitation is significantly greater in June, with 342 mm (13.5 in) falling over 24 days, in contrast to September's 192 mm (7.5 in) across 22 days. Humidity levels remain comparable, with September at 91% and June at 89%. For more detailed insights into June weather, check Itanagar weather in June.
In comparing the weather between September and July, both months exhibit similar average temperatures around 27°C (81°F) and maximum highs that can reach up to 35°C (95°F). However, July experiences slightly warmer minimum temperatures at 23°C (73°F), compared to September's minimum of 21°C (71°F). A notable distinction lies in the precipitation levels; July sees significantly more rainfall, accumulating 340 mm (13.4 in) over 28 days, while September has a reduced total of 192 mm (7.5 in) across 22 days. Both months share a high humidity level of 91%, contributing to the overall muggy conditions typical of the region. For more detailed information on July weather, you can check Itanagar weather in July.
In comparing the weather between September and August, we see that September experiences slightly lower minimum temperatures, averaging 21°C compared to August’s 24°C. However, the average temperature remains relatively stable, with September averaging 27°C and August 28°C, while both months peak at a maximum of 35°C. Additionally, September has a bit less rainfall, recording 192 mm over 22 days, compared to August's 213 mm over 24 days. Despite these differences, both months share high humidity levels of 91%, contributing to a consistently muggy atmosphere. For more details on the August weather, you can visit Itanagar weather in August.
September and October in Itanagar present a notable transition in weather patterns. September experiences warmer temperatures, with a minimum of 21°C (71°F) and an average of 27°C (80°F), while October sees cooler conditions, with a minimum of 17°C (62°F) and an average of 25°C (77°F). Precipitation also declines significantly; September receives 192 mm (7.5 in) over 22 days, whereas October has only 89 mm (3.5 in) across 11 days. Humidity remains similar, around 90-91%, suggesting the air feels equally moist as the seasons change. For a closer look at October's weather specifics in Itanagar, check out Itanagar weather in October.
In September, the weather is characterized by much higher temperatures, with minimums around 21°C (71°F) and maximums reaching up to 35°C (95°F), making it notably warmer than November. The month sees significant rainfall, with 192 mm (7.5 in) spread over 22 days, contributing to a high humidity level of 91%. In contrast, November presents a much cooler climate, with temperatures ranging from a minimum of 12°C (53°F) to a maximum of 29°C (85°F). Rainfall drops dramatically to just 23 mm (0.9 in) over 4 days, and humidity slightly decreases to 89%. For more detailed information, check out Itanagar weather in November.
September and December present a striking contrast in weather. In September, temperatures range from a minimum of 21°C (71°F) to a maximum of 35°C (95°F), with an average of 27°C (80°F). The month is also quite wet, receiving 192 mm (7.5 in) of rain over 22 days, and boasting high humidity levels at 91%. In contrast, December offers a much cooler climate, with temperatures dropping to a minimum of 9°C (48°F) and peaking at 27°C (81°F), averaging 17°C (62°F). Precipitation is significantly reduced, totaling just 12 mm (0.5 in) over 2 days, and humidity levels are slightly lower at 86%. For more detailed information, you can check Itanagar weather in December.
As September unfolds in Itanagar, visitors can expect a noticeable shift in weather patterns compared to the preceding months. The temperature hovers around a pleasant 27°C on average, with highs reaching up to 35°C, while the humidity remains a notable 91%, adding to the tropical ambiance. This month is characterized by increased rainfall, with 192 mm accumulating over approximately 22 days, marking it as one of the wettest months of the year. The combination of warmth and frequent showers creates a lush, green landscape, making it a captivating time to experience the region’s natural beauty. For more detailed climate insights, check out Itanagar Climate.