Last updated: August 21, 2025
September in Beihai, China is characterized by a warm climate, with maximum temperatures reaching up to 32°C (91°F) and an average of 28°C (83°F), allowing for enjoyable outdoor activities. The minimum temperature hovers around 23°C (74°F), providing comfortable evenings. However, this month also brings significant precipitation, totaling 278 mm (11.0 in) over approximately 23 days, resulting in a notably humid environment with an average humidity of 78%. Visitors should be prepared for both warmth and occasional rain as they explore this vibrant coastal city.
In September, Beihai, China, transitions towards a balmy autumn, showcasing mild temperatures that perfectly capture the essence of the region. With a minimum of 23°C (74°F) and an average of 28°C (83°F), the days remain pleasantly warm, making it ideal for outdoor adventures. As summer fades, the maximum temperature settles at 32°C (91°F), just slightly lower than the sweltering highs of August. This slight dip, coupled with increased humidity, creates a refreshing atmosphere, inviting both locals and tourists to explore the coastal beauty and vibrant culture before the cooler months arrive. September serves as a beautiful bridge between the intense heat of summer and the gentle chill of autumn, making it a fantastic time to experience all that Beihai has to offer.
September in Beihai, China, sees a significant precipitation total of 278 mm (11.0 in), maintaining the region’s trend of high rainfall as summer transitions into autumn. This month experiences around 23 rainy days, ensuring that the lush landscape remains vibrant. In comparison to the preceding months, September showcases a noticeable drop from August's remarkable 510 mm (20.1 in), yet still persists as one of the wettest months of the year. The gradual decline in rainfall from late summer peaks hints at the impending dry season, marking a shift as temperatures begin to cool. Ultimately, September's weather acts as a bridge between the intense summer rains and the more subdued, drier months ahead.
In September, Beihai experiences a slight decline in humidity at 78%, transitioning from the peak summer months where levels soared to 86% in July and August. This drop signals the onset of autumn, as humidity begins to recede from its summer high. Earlier months, particularly May and June, showcase a steady rise leading up to these peak levels, with May starting at 76%. Even as September’s humidity remains relatively high compared to earlier in the year, settling below the August figures, it sets a tone for the cooler and drier months ahead, with October's forecasted levels dipping further to 72%. Overall, the trend signifies a gradual shift from the muggy summer heat towards more comfortable autumn weather.
As summer transitions into autumn, Beihai, China, experiences a notable fluctuation in UV index levels. In September, the UV Index stands at 12, maintaining its classification in the extreme exposure category, which means outdoor enthusiasts should take care to limit sun exposure to just 10 minutes to prevent skin damage. This month sees a slight drop from August’s peak of 14, yet it remains much higher than the winter months, where the index plummets to 8 or lower. With an unwavering commitment to sun safety, it's crucial to remain vigilant during these early fall days. For detailed insights and updates on UV levels, check out Beihai UV Index.
UV Risk Categories
September in Beihai, China, brings a delightful 296 hours of sunshine, making it one of the sunniest months of the year. As summer gradually fades, there’s a noticeable transition from the peak brightness of May and July, where residents basked in over 300 hours of sunlight, to a still vibrant yet milder September. Following a dip in August, where sunshine dipped to 282 hours, September showcases a return to brightness, suggesting an inviting climate for outdoor adventures. This consistent trend of abundant sunlight well into the fall positions Beihai as an ideal retreat for those looking to soak up the last rays of summer before the cooler months set in.
In Beihai, China, September brings a 39% chance of sunny weather, signaling a modest improvement as summer wanes. This marks a slight increase from the notably low sunshine probabilities seen throughout the peak summer months of June and August, which hover around 15% and 16%, respectively. Interestingly, as the year progresses from the sunny peaks of January (52%) and February (66%), the likelihood of clear skies tends to dip during the mid-year months before making a gradual comeback in autumn. Expect September to embrace a blend of sunny days and lingering summer warmth, making it a pleasant time to enjoy outdoor activities in this coastal city.
In Beihai, China, September marks a transitional period in daylight duration, with the sun gracing the skies for 12 hours each day. This follows the peak summer months of June, July, and August, where daylight reaches its zenith at 13 hours. As autumn approaches, the trend begins to shift, foreshadowing shorter days ahead in October, which reverts to 11 hours of daylight. Notably, the gradual increase from just 10 hours in January to 13 hours in the summer illustrates how days lengthen beautifully through the spring and summer, creating a vibrant tapestry of light that sustains through the fall before yielding to the shorter days of winter.
As September rolls in Beihai, China, the gentle breezes bring a noticeable shift, with the average wind speed tapering to 3.2 m/s (7 mph). This dip represents the calm before the windier months, as the region transitions from a summer of moderately steady winds. From the lively gusts seen in June, averaging 6.2 m/s (14 mph), the winds gradually eased over the summer, settling into a tranquil rhythm echoed in September. The change sets the stage for October's lively resurgence, where speeds pick up again to 6.9 m/s (15 mph). This pattern highlights how Beihai’s coastal climate dances through the months, blending calmness with invigorating winds throughout the year.
Weather in Beihai varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Beihai, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January showcase contrasting weather patterns. In September, temperatures range from a minimum of 23°C (74°F) to a maximum of 32°C (91°F), with an average of 28°C (83°F), accompanied by high humidity levels of 78% and significant rainfall of 278 mm (11.0 in) over 23 days. In stark contrast, January temperatures are much cooler, with a minimum of 7°C (45°F), an average of 17°C (62°F), and a maximum of 24°C (75°F). Precipitation is substantially lower in January, with only 34 mm (1.4 in) over just 6 days, and humidity decreases to 66%. For more detailed insights about the weather in January, you can visit Beihai weather in January.
Comparing the weather in September and February reveals striking differences. September experiences warm temperatures, with a minimum of 23°C (74°F) and an average of 28°C (83°F), peaking at 32°C (91°F). This month also sees significant rainfall, with 278 mm (11.0 in) of precipitation spread over 23 days and humidity levels averaging 78%. In contrast, February offers much cooler conditions, featuring a minimum temperature of 8°C (46°F) and an average of 17°C (64°F), reaching a maximum of 26°C (79°F). Precipitation is significantly lower in February, totaling just 54 mm (2.1 in) over 7 days, with humidity at 71%. For a more detailed look at February's weather, you can visit Beihai weather in February.
When comparing the weather in September and March, it's clear that September is much warmer and wetter. In September, temperatures range from a minimum of 23°C (74°F) to a maximum of 32°C (91°F), with an average of 28°C (83°F), while March sees cooler temperatures that range from 14°C (57°F) to 27°C (82°F), averaging at 21°C (70°F). Additionally, September experiences a significant amount of rainfall, totaling 278 mm (11.0 in) over 23 days, whereas March has considerably less precipitation at 59 mm (2.3 in) spread over just 12 days. The humidity levels also show a slight difference, with September at 78% compared to March's 73%. For more detailed information, you can check Beihai weather in March.
In September, the weather is notably warmer compared to April, with temperatures ranging from a minimum of 23°C (74°F) to a maximum of 32°C (91°F) and an average of 28°C (83°F). The month is also characterized by high humidity at 78% and frequent rainfall, totaling 278 mm (11.0 in) across 23 days. In contrast, April experiences milder temperatures, with a minimum of 16°C (60°F), an average of 24°C (75°F), and a maximum of 30°C (86°F). The precipitation is significantly lower at 141 mm (5.6 in) over just 12 days, coupled with a more comfortable humidity level of 71%. For more details on the weather in April, you can check Beihai weather in April.
In September, the weather tends to be warmer with average temperatures reaching 28°C (83°F) and a maximum of 32°C (91°F), compared to May, which has slightly cooler averages with minimums of 19°C (66°F) and maximums of 32°C (89°F). September also experiences significantly more rain, with 278 mm (11.0 in) of precipitation over 23 days, while May sees about 195 mm (7.7 in) across 18 days. Humidity remains high in both months, at 78% in September and 76% in May, creating a consistently warm and muggy climate. For more detailed weather specifics, check out Beihai weather in May.
In comparing the weather in September and June, we find that both months have similar temperature ranges, with September averaging 28°C (83°F) and June slightly warmer at 29°C (85°F). However, September tends to be more humid, with humidity levels at 78% compared to June's 79%. Rainfall is also comparable, as September experiences 278 mm (11.0 in) of precipitation over 23 days, while June sees 280 mm (11.0 in) over 21 days. If you're interested in more details about June weather, you can check out Beihai weather in June.
Comparing the weather in September and July reveals some notable differences. In September, temperatures range from a minimum of 23°C (74°F) to an average of 28°C (83°F), peaking at a maximum of 32°C (91°F). While the humidity remains relatively high at 78%, it's slightly lower than July's humidity of 86%. July experiences warmer temperatures overall, with a minimum of 25°C (78°F) and an average of 29°C (85°F), reaching the same maximum of 33°C (91°F) as September. However, July is also marked by significantly higher precipitation, amassing 367 mm (14.5 in) over 23 days, compared to September's 278 mm (11.0 in) over the same number of days. For more detailed insights, you can check out Beihai weather in July.
In comparing the weather between August and September, we see some notable differences. September experiences slightly lower temperatures, with average highs around 32°C (91°F) compared to August's maximum of 33°C (92°F). The humidity also decreases from 86% in August to 78% in September, making the weather feel a touch more comfortable as the month progresses. However, September sees significantly less rainfall, with 278 mm (11.0 in) over 23 days, compared to August's substantial 510 mm (20.1 in) over 26 days. For more detailed insights, you can check Beihai weather in August.
September tends to be warmer and more humid compared to October, with average temperatures reaching 28°C (83°F) and peak highs of 32°C (91°F). Additionally, September experiences significantly more rainfall, accumulating 278 mm (11.0 in) over 23 days, making it one of the wetter months. In contrast, October sees a decrease in average temperatures to 25°C (78°F) and a maximum of 32°C (89°F), alongside reduced precipitation of 187 mm (7.4 in) over just 14 days, leading to a lower humidity level of 72%. For a detailed look at October weather, you can check Beihai weather in October.
In September, the weather is typically much warmer and more humid, with temperatures ranging from a minimum of 23°C (74°F) to a maximum of 32°C (91°F) and an average of 28°C (83°F). This month also sees significant rainfall, with 278 mm (11.0 in) of precipitation occurring over 23 days, contributing to a high humidity level of 78%. In contrast, November brings a noticeable drop in temperature, with a range from 13°C (56°F) to 27°C (81°F) and an average of 22°C (72°F). Precipitation significantly decreases to just 34 mm (1.3 in) over 6 days, and humidity lowers to 69%. For more detailed insights, you can check Beihai weather in November.
September and December present contrasting weather patterns. In September, temperatures range from a minimum of 23°C (74°F) to a maximum of 32°C (91°F), with an average of 28°C (83°F). This month is characterized by high humidity at 78% and significant rainfall, with 278 mm (11.0 in) spread over 23 days. In stark contrast, December offers much cooler temperatures, with a minimum of 7°C (45°F) and a maximum of 25°C (78°F), averaging 17°C (64°F). Precipitation is minimal in December, at just 39 mm (1.5 in) over 7 days, and humidity decreases to 70%. For more details, check out Beihai weather in December.
As summer transitions to autumn, September in Beihai offers a unique blend of warmth and humidity that sets it apart from other months. With temperatures peaking at a pleasant average of 28°C, the oceanic charm remains captivating, though the high humidity at 78% can make it feel quite sultry. Rainfall during this month is significant, with an average of 278 mm over 23 days, contributing to the lush landscapes that define the region. This month is marked by frequent showers, contrasting sharply with the drier periods of winter and spring. For a deeper dive into seasonal trends, check out Beihai Climate.