Last updated: August 21, 2025
September in Port Blair, India, presents a tropical ambiance characterized by warm temperatures, with a maximum reaching 29°C (84°F) and an average hovering around 27°C (81°F). As the month progresses, expect a comfortable minimum temperature of 25°C (78°F). However, this lively atmosphere comes with significant precipitation, totaling 374 mm (14.7 in) over 27 days, contributing to the region's lush greenery. The humidity remains high at 82%, enhancing that tropical feel while creating a vibrant backdrop for exploration and relaxation in this beautiful coastal destination.
In September, Port Blair experiences a delightful tropical climate, with temperatures that hover comfortably between 25°C (78°F) at night and a pleasant average of 27°C (81°F) during the day, peaking at 29°C (84°F). This month marks a transition from the heavier monsoon rains of July and August, offering a glimpse of calmer days ahead. As the temperatures remain steady and mild, September is perfect for exploring the island's lush landscapes and vibrant culture. Following the trends of previous months, the heat remains manageable, showcasing a consistent warmth that is typical for this region year-round, making it an opportune time for travelers to enjoy outdoor activities without the oppressive heat.
September is a remarkable month for precipitation in Port Blair, India, marking the culmination of the monsoon season with an impressive 374 mm (14.7 in) of rain. This substantial rainfall occurs over 27 days, showcasing a sustained pattern of wet weather that characterizes the region during this time. As the highest precipitation month of the year, September reflects a notable uptick from August's already significant 334 mm (13.1 in). This trend highlights the intensity of the monsoon, where heavy downpours are frequent and cumulative rainfall significantly contributes to the area's lush foliage and vibrant ecosystems. As September transitions into October, the rainfall begins to taper off, yet the lingering effects of these monsoon showers continue to nurture the diverse landscape of Port Blair, setting the stage for a lush and green environment in the months ahead.
In September, Port Blair experiences an average humidity of 82%, marking a slight dip from the peak levels reached during the monsoon months of July and August, which boast humidity rates of 84% and 85%, respectively. This moderate decrease hints at the gradual transition towards a more temperate climate as the region begins to step into October, where humidity levels further stabilize around 79%. Interestingly, despite the fluctuations throughout the year, humidity remains consistently high, rarely dropping below 72% in May, suggesting that residents and visitors alike will always encounter a tropical embrace. The trend across the months showcases a distinct pattern of peak humidity aligning with the monsoon season, ultimately crafting Port Blair’s unique atmospheric character.
September in Port Blair, India, continues the trend of extreme UV exposure, maintaining a UV Index of 14. As the monsoon season lingers, sun seekers should remain cautious, as the burn time is a mere 10 minutes. This consistency in high UV levels from January through September emphasizes the necessity for protective measures, reinforcing the reality that staying sun-safe is paramount year-round. With similar readings echoing from the preceding months, it's clear that visitors should stay informed and prepared. For more detailed insights, check out Port Blair UV Index.
UV Risk Categories
As September unfolds in Port Blair, the island basks in 281 hours of sunshine, striking a perfect balance between the lingering monsoon and the promise of drier days ahead. This month marks a subtle shift from the dampness of August, which recorded only 258 hours of sunlight. The overall trend in Port Blair's weather reveals a sunnier disposition as the year progresses, with longer days seen in the spring months of March and April, where sunshine peaked at 348 hours and 335 hours, respectively. As we transition into October, Port Blair is set to embrace even more sunshine, highlighting the region's dynamic climate and its allure for sun-seekers. With each passing month, the friendly skies beckon visitors to explore its natural beauty under increasingly sunny conditions.
In Port Blair, the likelihood of sunny weather takes a noticeable dip in September, with only a 12% chance of sunshine. This marks a stark contrast to the sunnier months earlier in the year, such as February when the possibility of clear skies peaks at 70%. The trend shows a significant decline from the warmer months leading up to September, where sunshine chances plummet from around 45% in April to a mere 11% in the heart of the monsoon season, driven primarily by heavy rains. As the year progresses, October sees a slight uptick at 17%, hinting at a gradual return to more favorable weather. Thus, if you're planning a trip in September, it's wise to prepare for overcast skies and occasional showers rather than basking in the sun.
As September arrives in Port Blair, India, the day continues to bask in approximately 12 hours of daylight, marking the tail end of the island's consistent light period. From March through September, the daylight remains stable, reflecting a rhythmic pattern that beautifully balances the changing seasons. Following this month, daylight will gradually shorten into October, where it dips back to 11 hours, signaling the transition towards the end of the year. This consistent 12-hour span throughout the summer months not only enhances outdoor activities but also cultivates a vibrant atmosphere, making it an ideal time for exploration and enjoyment in this tropical paradise.
In September, Port Blair experiences a steady breeze with an average wind speed of 6.8 m/s (15 mph), mirroring the winds of August. This month marks a transition from the peak winds of July, which recorded an impressive 8.2 m/s (18 mph), as the monsoon begins to wane. Following the vigorous gales of mid-year, September's winds provide a gentle respite, hinting at the shift towards the calmer months ahead. After a notably breezy June and July, the wind speeds gradually decline, with October's winds dropping to 5.4 m/s (12 mph), offering a more tranquil atmosphere as the locale prepares for the approaching dry season. This pattern not only enhances the scenic beauty of the Andaman Islands but also creates an inviting environment for outdoor activities and exploration.
Weather in Port Blair varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Port Blair, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of September and January, we see some striking similarities and differences. Both months experience average temperatures around 27°C (80°F), with minimums of 25°C (78°F) in September and 24°C (76°F) in January. However, September is significantly wetter, with 374 mm (14.7 in) of rainfall over 27 days compared to January's 72 mm (2.8 in) over just 10 days. Additionally, humidity is slightly higher in September at 82%, while January sees a more comfortable 77%. For more specific details on January weather, you can refer to Port Blair weather in January.
In comparing the weather of September and February, both months maintain a similar average temperature of 27°C (81°F), with max temperatures consistently reaching 29°C (84°F). However, September is markedly wetter, receiving 374 mm (14.7 in) of precipitation over 27 days, resulting in a high humidity level of 82%. In contrast, February experiences much lighter rainfall, only 15 mm (0.6 in) across 3 days, and slightly reduced humidity at 79%. This stark difference in precipitation and humidity makes February a drier and more comfortable month compared to the heavy rains characteristic of September. For more details, you can check Port Blair weather in February.
When comparing the weather in September and March, we find both months share a similar temperature range, with September averaging around 27°C (81°F) and March slightly warmer with an average of 28°C (82°F). However, September is markedly wetter, receiving a substantial 374 mm (14.7 in) of rainfall over 27 days, compared to the minimal 9 mm (0.3 in) of precipitation in March, which falls over just 3 days. The humidity levels are quite comparable, with September at 82% and March at 81%. For more detailed information about March weather specifically, you can refer to Port Blair weather in March.
In comparing the weather of September and April, it is evident that both months experience warm temperatures, but with notable differences in precipitation and humidity. September has a lower average temperature range, with minimums of 25°C and maximums of 29°C, while April sees slightly warmer averages, peaking at 30°C. However, September is characterized by significantly higher rainfall, receiving 374 mm over 27 days compared to April's more manageable 79 mm across just 11 days. Additionally, humidity levels are higher in September at 82%, compared to 77% in April, making September feel more oppressive. For more details on the weather specifics, you can check Port Blair weather in April.
In comparing the weather of September and May, we find that both months experience warm temperatures, but May tends to be slightly warmer overall. September has an average temperature of 27°C (81°F) with a maximum of 29°C (84°F), while May's average temperature is 28°C (83°F) and can reach up to 30°C (87°F). Precipitation is notably higher in September, with 374 mm (14.7 in) falling over 27 days, compared to May's 280 mm (11.0 in) over 26 days. Additionally, September boasts a higher humidity of 82%, whereas May has a slightly more comfortable humidity level of 72%. For more detailed weather information, you can refer to Port Blair weather in May.
When comparing the weather in September and June, both months exhibit similar warm temperatures, with September experiencing slightly lower averages. In September, the minimum temperature is 25°C (78°F), averaging 27°C (81°F), while June has a minimum of 26°C (79°F) and an average of 28°C (82°F). Both months are characterized by significant rainfall, with September receiving 374 mm (14.7 in) of precipitation over 27 days, which is a bit higher than June's 335 mm (13.2 in) in the same number of days. Additionally, humidity levels are quite high in both months, at 82% in September compared to 80% in June. For more detailed insights, you can check Port Blair weather in June.
In comparing the weather of September and July, both months feature similar temperature ranges, with September having a minimum of 25°C (78°F) and a maximum of 29°C (84°F), while July shows a minimum of 26°C (79°F) and a maximum of 29°C (85°F). However, September experiences significantly higher precipitation, recording 374 mm (14.7 in) across 27 days, compared to July's 275 mm (10.8 in) over the same number of days. Additionally, humidity levels are slightly lower in September at 82% compared to July's 84%. For more detailed information, you can visit Port Blair weather in July.
In comparing the weather of September to August, both months exhibit similar temperature profiles, with minimums at 25°C (78°F), averages at 27°C (81°F), and maximums at 29°C (84°F). However, September experiences slightly higher precipitation at 374 mm (14.7 in) over 27 days, compared to August's 334 mm (13.1 in) over 28 days. The humidity levels also see a minor reduction in September at 82%, whereas August holds a slightly higher humidity of 85%. For a more detailed look at August's conditions, you can refer to Port Blair weather in August.
September and October exhibit similar temperature patterns, with minimums around 25°C (78°F), averages at 27°C (81°F), and maximums reaching 29°C (84°F). However, October experiences slightly less rainfall, with 305 mm (12.0 in) compared to September's 374 mm (14.7 in), despite having one more day of precipitation. The humidity also decreases marginally, dropping from 82% in September to 79% in October, contributing to a more comfortable atmosphere as the month progresses. For more detailed weather insights, see Port Blair weather in October.
In comparing the weather between September and November, both months exhibit similar temperature ranges, with minimums around 25°C (78°F), average temperatures of 27°C (81°F), and maximums reaching 29°C (84°F in September and 85°F in November). However, November experiences significantly less rainfall, with only 195 mm (7.7 in) compared to September's 374 mm (14.7 in), and fewer rainy days, dropping from 27 to 19. Additionally, humidity slightly decreases from 82% in September to 79% in November, contributing to a more comfortable atmosphere as the year progresses. For more detailed information about November weather, you can visit Port Blair weather in November.
In September, the weather is marked by warm temperatures, with minimums around 25°C (78°F) and maximums peaking at 29°C (84°F). The month is also quite rainy, experiencing a staggering 374 mm (14.7 in) of precipitation over 27 days, leading to a high humidity level of 82%. In contrast, December sees a slight drop in humidity to 78%, with similar temperature averages (min 24°C/76°F, avg 27°C/81°F, max 29°C/85°F) but significantly reduced rainfall, totaling just 137 mm (5.4 in) over 14 days. This shift results in a drier and more pleasant climate as the year comes to a close. For more details on the weather during this month, you can check Port Blair weather in December.
As September unfolds in Port Blair, the weather showcases a distinctive blend of warmth and moisture. With average temperatures hovering around 27°C (81°F), this month welcomes a notable increase in rainfall, recording approximately 374 mm over 27 days, culminating in a distinctly humid atmosphere at 82%. This sets September apart from the drier months, creating a lush, green backdrop that breathes life into the island's vibrant landscapes. Travelers seeking to experience the lush beauty and tranquil ambiance of Port Blair during this time will find the tropical charm irresistible. For more insights on the yearly climate, explore Port Blair Climate.