Last updated: October 30, 2025
In September, Sitamarhi, India experiences a warm climate characterized by a maximum temperature reaching up to 37°C (99°F) and an average of 29°C (85°F). The evenings bring a slight relief with a minimum temperature settling around 23°C (73°F). This month is notably humid, with levels soaring to 92%, creating a sultry atmosphere. Rainfall is significant, accumulating 282 mm (11.1 in) over an impressive 24 days, transforming the landscape and providing much-needed moisture during the shift to the post-monsoon season.
In September, Sitamarhi experiences a gentle transition as temperatures begin to cool after the sweltering summer months. With a minimum of 23°C (73°F) and an average around 29°C (85°F), the days remain warm yet more comfortable than in the preceding months. The maximum temperature of 37°C (99°F) still hints at the lingering summer, but a noticeable drop from August’s sweltering highs indicates the shift towards a milder autumn. This month serves as a bridge, where humidity starts to wane and the lush greenery of the region is enhanced by the monsoon rains, making it an ideal time to explore the vibrant landscapes of Sitamarhi.
In September, Sitamarhi experiences a significant shift in precipitation patterns, marked by a substantial rainfall total of 282 mm (11.1 in) over 24 days. This contributes to the late monsoon season, reflecting a decline from the torrential rains of July and August. While July sees the highest annual precipitation at 458 mm (18.0 in), September maintains a healthy amount that still shapes the region's lush landscape. This month acts as a transition, where the persistent rains gradually taper off, paving the way for the drier months ahead. Overall, September’s rainfall serves as a vital contributor to the agricultural cycle, ensuring the land remains nourished before entering the dry spell that follows.
September in Sitamarhi, India, marks a continuation of the high humidity that envelops the region during the monsoon season. With humidity levels peaking at 92%, this month is consistent with the preceding months of July and August, both of which also registered the same high levels. Notably, the humidity has surged dramatically from 25% in April to a peak this month, showcasing the region’s climatic transition from the dry heat of early spring to the dampness of the wet season. As the monsoon begins to recede, humidity remains elevated but will gradually taper off in the following months, signaling a return to more moderate conditions as the year progresses into autumn.
In September, Sitamarhi experiences an UV Index of 11, placing it in the extreme exposure category where burn time is notably reduced to just 10 minutes. This month marks a slight decrease from the peak UV Index of 13 observed in July, but remains significantly high, indicating a need for sun protection. Overall, the trend in Sitamarhi shows that as summer progresses from January's moderate levels, the UV Index escalates to extreme measures during the vibrant monsoon months. As the year shifts into autumn, the UV levels gradually taper off, yet September still demands vigilance to prevent skin damage. For more detailed information on daily UV levels, visit Sitamarhi UV Index.
UV Risk Categories
September in Sitamarhi, India, welcomes a delightful transition as the summer heat begins to ease, providing a pleasant backdrop for outdoor activities. With 272 hours of sunshine, the month maintains a healthy dose of brightness, slightly lower than the peak summer months but still vibrant enough to invite exploration and adventure. This trend of diminishing daylight continues from the sweltering 350 hours in May down to a moderate 300 hours in October, hinting at the gradual onset of autumn. Interestingly, while July sees the least sun at 242 hours, September shines with more consistency than the preceding rainy months, offering a perfect blend of warmth and light to celebrate the changing season.
In Sitamarhi, India, the likelihood of sunny weather in September reveals a notable shift as the monsoon recedes, with a 27% chance of sunshine. This percentage signifies a downward trend from the sunniest months earlier in the year, such as February and March, which boast chances above 80%. Following the peak rainfall in the summer months of June and July, where the sun appears only 10% of the time, September begins to hint at a gradual recovery of clearer skies. Although still below average compared to the spring and early summer, the forecast for sunny days in September is a promising precursor to the more favorable conditions that arrive in October and November, when opportunities for sunlight increase significantly again.
In Sitamarhi, India, the rhythm of daylight throughout the year reveals a fascinating pattern. Starting with a modest 10 hours in January, the days gradually extend, reaching a peak of 13 hours from May to August, showcasing the vibrant energy of summer. As September arrives, there’s a gentle decline to 12 hours, hinting at the impending transition to autumn. This decrease continues into October and November, where daylight dips back to 10 hours, reminiscent of January's early chill. The overall trend illustrates a gradual build-up to long, sunlit days in the summer months, followed by a soft retreat as the year winds down.
As September unfolds in Sitamarhi, the average wind speed reaches a refreshing 3.0 m/s (7 mph). This marks a notable peak before the winds begin to slow down in the following months. The gentle breezes of September provide a delightful contrast to the hotter summer months, shifting from stronger gusts in June and May. There’s a slight tapering off as the region transitions into autumn, with the winds gradually winding down as temperatures drop. With the summer heat behind and a promise of cooler days ahead, September's winds create a perfect backdrop for outdoor activities and a sense of renewal in this vibrant town.
Weather in Sitamarhi varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Sitamarhi, focusing on differences in temperature, rainfall, humidity, and UV levels.
September is characterized by warm temperatures, with daily averages around 29°C (85°F) and maximums reaching up to 37°C (99°F). The month is quite humid, with a high humidity level of 92% and substantial rainfall, totaling 282 mm (11.1 in) over 24 days. In stark contrast, January experiences much cooler weather, featuring a minimum temperature of 6°C (43°F) and an average of 15°C (60°F), with maximums peaking at 29°C (85°F). January is notably drier, with only 9 mm (0.4 in) of precipitation falling over just 1 day, and humidity levels drop to a comfortable 58%. For more detailed information on the weather during this month, you can check Sitamarhi weather in January.
September and February show stark contrasts in weather patterns. In September, temperatures reach a sunny average of 29°C (85°F), soaring to a high of 37°C (99°F), accompanied by high humidity at 92% and substantial rainfall totaling 282 mm (11.1 in) over 24 rainy days. In contrast, February experiences much cooler temperatures, with an average of 19°C (67°F) and a maximum of only 32°C (91°F). The month is notably drier, with just 18 mm (0.7 in) of precipitation across 2 days and a more comfortable humidity level of 53%. For detailed insights, check out Sitamarhi weather in February.
September and March present strikingly different weather conditions. In September, the temperatures range from a minimum of 23°C (73°F) to a scorching maximum of 37°C (99°F), with an average of 29°C (85°F). The month is characterized by high humidity at 92% and substantial rainfall, accumulating to 282 mm (11.1 in) over 24 days. In contrast, March experiences a cooler climate with temperatures ranging from a chilly 9°C (49°F) at night to a warm maximum of 38°C (101°F), averaging around 25°C (77°F). Precipitation is minimal in March, amounting to just 16 mm (0.6 in) over only 2 days, and the humidity drops significantly to 32%. For a detailed look at March weather, you can visit Sitamarhi weather in March.
In comparing the weather of September and April, we observe notable differences in temperature, precipitation, and humidity. September experiences warmer average temperatures ranging from a minimum of 23°C (73°F) to a maximum of 37°C (99°F) with an average of 29°C (85°F). It also sees high humidity levels at 92% and significant rainfall, totaling 282 mm (11.1 in) over 24 days. In contrast, April features slightly cooler minimum temperatures of 18°C (64°F) but can reach scorching highs of 42°C (108°F), maintaining the same average of 29°C (85°F). April is much drier, with only 29 mm (1.1 in) of precipitation occurring over just 6 days and a significantly lower humidity of 25%. For more details on April weather, you can visit Sitamarhi weather in April.
In September, the weather is marked by high humidity at 92%, with temperatures ranging from a minimum of 23°C (73°F) to a maximum of 37°C (99°F) and an average of 29°C (85°F). The month is also quite rainy, receiving 282 mm (11.1 in) of precipitation over 24 days. In contrast, May boasts a slightly lower humidity level at 46%, with temperatures peaking even higher, reaching a maximum of 42°C (108°F) and averaging around 30°C (86°F), while experiencing significantly less rainfall of 123 mm (4.9 in) over just 13 days. For more detailed information about May weather, you can visit Sitamarhi weather in May.
In comparing the weather of September and June, we see notable differences in temperature and humidity. September typically sees a minimum temperature of 23°C (73°F) and an average of 29°C (85°F), with a maximum reaching 37°C (99°F), while June starts at a slightly higher minimum of 24°C (75°F) and averages 31°C (88°F), peaking at a scorching 43°C (110°F). Precipitation levels also vary, with September experiencing more rainfall at 282 mm (11.1 in) over 24 days compared to June's 220 mm (8.7 in) across 18 days. Additionally, September's humidity is considerably higher at 92%, compared to June's 77%. These factors reflect the transition from the wetter, more humid conditions of September to the hotter, drier climate of June. For a detailed overview of June weather, you can check Sitamarhi weather in June.
When comparing the weather in September and July, both months exhibit high temperatures and humidity levels. In September, the minimum temperature is slightly lower at 23°C (73°F), while the average temperature is 29°C (85°F), peaking at a maximum of 37°C (99°F). This month receives 282 mm (11.1 in) of precipitation over 24 days. In contrast, July is warmer overall, with a minimum temperature of 25°C (77°F), an average of 30°C (86°F), and a maximum reaching 39°C (102°F). However, it is also significantly wetter, with 458 mm (18.0 in) of rainfall occurring on 29 days. Both months experience a high humidity level of 92%, contributing to a muggy atmosphere. For more details on the weather conditions during July, you can refer to Sitamarhi weather in July.
In comparing the weather between September and August, we see that September experiences slightly lower minimum and average temperatures, with a minimum of 23°C (73°F) and an average of 29°C (85°F), compared to August's minimum of 26°C (78°F) and average of 30°C (86°F). However, September has a maximum temperature that remains relatively close to August's highest at 37°C (99°F) versus 38°C (100°F). Precipitation levels are higher in August, with 347 mm (13.7 in) over 28 days, compared to September's 282 mm (11.1 in) across 24 days. Interestingly, both months share the same high humidity level of 92%, creating a consistently humid atmosphere. For more detailed information, you can visit Sitamarhi weather in August.
In September, the weather tends to be much warmer and more humid, with temperatures ranging from a minimum of 23°C (73°F) to a maximum of 37°C (99°F) and an average high of 29°C (85°F). Additionally, September experiences significant rainfall, totaling 282 mm (11.1 in) over 24 days, making the atmosphere quite muggy with a humidity level of 92%.
In contrast, October brings a notable decrease in temperature, with a minimum of 17°C (62°F) and an average of 27°C (81°F), while still reaching up to 37°C (99°F) on the hottest days. The month is much drier, receiving only 85 mm (3.4 in) of precipitation on just 7 days, leading to lower humidity levels at 87%. This change makes October a more comfortable month overall. For more detailed information, you can check Sitamarhi weather in October.
September and November showcase a stark contrast in weather conditions. In September, temperatures range from a minimum of 23°C (73°F) to a scorching maximum of 37°C (99°F), with an average of 29°C (85°F). This month is also characterized by high humidity at 92% and substantial rainfall, totaling 282 mm (11.1 in) over 24 days. In sharp contrast, November experiences much cooler temperatures, with a minimum of 12°C (53°F), an average of 22°C (72°F), and a maximum of 35°C (96°F). Remarkably, November boasts dry weather with no recorded precipitation over the month and a reduced humidity level of 76%. For more detailed insights, you can refer to Sitamarhi weather in November.
September and December exhibit stark contrasts in weather conditions. In September, temperatures soar with a minimum of 23°C (73°F) and can reach a sweltering maximum of 37°C (99°F), averaging around 29°C (85°F). This month is characterized by high humidity at 92% and significant precipitation, with 282 mm (11.1 in) of rain falling over 24 days, creating a rather damp atmosphere. In contrast, December brings much cooler temperatures, with a minimum of 5°C (42°F) and a pleasant average of 17°C (63°F), peaking at 30°C (87°F). This month experiences minimal rainfall, with just 15 mm (0.6 in) and no rainy days, leading to a much drier environment and a drop in humidity to 71%. For a closer look at December weather, you can explore Sitamarhi weather in December.
September in Sitamarhi stands out from the other months with its unique blend of warmth and dampness. While daytime temperatures can soar, averaging a balmy 29°C, the intensity of the humidity—hovering around a remarkable 92%—creates a tropical atmosphere. This month is characterized by significant rainfall, with nearly 24 days experiencing precipitation, amassing 282 mm in total. This shift in weather not only offers a respite from the summer heat but also nurtures the lush greenery that envelops the region, marking a transitional phase into the much-anticipated autumn. For a detailed overview, explore more at Sitamarhi Climate.