Last updated: August 21, 2025
In September, Harbin experiences a delightful transition into autumn, with maximum temperatures reaching a comfortable 29°C (84°F) and an average of 16°C (61°F). As the month unfolds, temperatures can drop to a minimum of 2°C (35°F) during the cooler nights, creating a diverse range of climate experiences. The city sees 104 mm (4.1 in) of precipitation spread over approximately 11 days, making it a month of occasional showers amid the hint of autumn's chill. With humidity levels hovering around 84%, visitors can expect a crisp yet refreshing atmosphere, perfect for exploring Harbin's rich cultural tapestry and scenic beauty.
In September, Harbin experiences a delightful transition from the summer heat to the coolness of autumn. With temperatures ranging from a minimum of 2°C (35°F) to a pleasant maximum of 29°C (84°F), the city enjoys an average of 16°C (61°F), making it an ideal time for outdoor activities and exploration. This month marks a significant drop from the scorching highs of July and August, signaling the end of the sweltering summer months. The crisp air and moderate warmth create a comfortable atmosphere perfect for enjoying the stunning fall foliage that begins to emerge, inviting both locals and tourists to revel in the beauty of Harbin's changing seasons. As the mercury dips, the vibrant landscapes of this northern Chinese city come to life, setting the stage for the enchanting winter ahead.
September in Harbin marks a notable transition, as the city receives 104 mm (4.1 in) of precipitation over 11 days, signaling the waning days of summer and the onset of autumn. This month’s rainfall is a significant drop from the excessive moisture of August, which typically sees the highest precipitation of the year at 176 mm (6.9 in). However, September’s total remains substantial, surpassing earlier months like May and April. The consistent rainfall serves as a reminder of summer's lingering presence, while also hinting at the drier months ahead. As the days shorten and temperatures cool, the rainfall in September sets the stage for the gradual transition towards the crisp, clear days of fall.
In September, Harbin experiences a significant level of humidity, averaging around 84%. This marks a slight decrease from the intense humidity of August, which peaks at 87%, but it still holds onto the residual warmth of summer. As the seasons transition, the humidity level begins to drop, paving the way for the cooler months ahead. Notably, this high humidity trend started in June and has remained elevated through September. Following this month, humidity levels will gradually decline, reaching a low of 53% in December, showcasing the city's progression from the sultry summer to the crispness of winter.
As September rolls in Harbin, China, the UV Index experiences a notable shift, registering at 6, which falls into the high exposure category. This means residents and visitors alike should take extra caution, with a burn time of approximately 25 minutes under direct sunlight. After the intense summer months of 8 and 9 when UV exposure was rated very high, September brings a slightly milder yet still significant level of UV radiation. As daylight begins to shorten, it's essential to remain vigilant about sun safety during this transitional month. For more detailed information, check out the Harbin UV Index.
UV Risk Categories
In September, Harbin experiences a delightful transition as summer gives way to autumn, basking in 271 hours of sunshine. This marks a gentle decline from the peak of 337 hours in July, showcasing a gradual shift in daylight as the days begin to shorten. Following the vibrant summer months, September serves as a perfect bridge, offering a pleasant amount of sunlight that lingers, yet hints at the cooler days ahead. As the air crispens and the leaves start to turn, the city's charm shines brightly in this month's warm glow, making it an ideal time for outdoor explorations before the chill of winter settles in.
As September rolls into Harbin, the chance of sunny weather hovers around 42%, marking a pivotal moment in the annual sunshine trend. After a summer slump with the lowest probabilities in July and August, the onset of fall brings a slight improvement in sunny days, though it still lags behind the winter months like January and October, which boast percentages of 65% and 59%, respectively. This gradual uptick indicates a shift, as the fleeting warmth of summer gives way to the crispness of autumn, making sunny September days a refreshing respite. While not guaranteed, this month offers a glimmer of hope for those seeking sunshine before the chill intensifies.
As September unfolds in Harbin, China, daylight begins to wane, offering about 12 hours of sunlight. This marks a noticeable shift from the summer months, where daylight peaked at 15 hours in June and July, creating a vibrant atmosphere perfect for outdoor activities. As the seasons transition, the sunlight gradually diminishes—a continuation of the trend observed since the peak in May and August, when days were filled with nearly the maximum light. With October looming, the daylight duration will further reduce to 10 hours, heralding the onset of autumn and the cozy embrace of cooler days ahead. This rhythmic ebb and flow of daylight not only signifies seasonal changes but also invites residents and visitors alike to savor the rich beauty of Harbin’s early fall.
As September settles in Harbin, the wind takes on a softer demeanor, with an average speed of 2.8 m/s (6 mph), making it one of the calmest months of the year. This gentle breeze is a noticeable shift from the stronger gusts of spring and early summer, where speeds peaked at 4.3 m/s (10 mph) in April. The gradual decline in wind strength over the warmer months not only ushers in the beginning of autumn but also provides a tranquil atmosphere that complements the city's stunning fall foliage. As the season transitions, the winds regain a bit of vigor in October, returning to a brisker 3.6 m/s (8 mph), hinting at the approaching chill of winter. This cyclic pattern in wind behavior underscores Harbin's shifting climate and the serene beauty that September brings to its streets and parks.
Weather in Harbin varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Harbin, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of September and January, significant contrasts emerge. September experiences a mild range of temperatures, with a minimum of 2°C (35°F) and a pleasant average of 16°C (61°F), peaking at a warm 29°C (84°F). Additionally, it sees more precipitation, totaling 104 mm (4.1 in) over 11 days, accompanied by high humidity at 84%. In stark contrast, January brings frigid conditions, with temperatures plummeting to a minimum of -37°C (-34°F) and an average of -17°C (1°F), only rising to a maximum of 0°C (32°F). This month experiences substantially less precipitation, with just 5 mm (0.2 in) across 1 day and lower humidity at 73%. For a detailed look at what to expect, you can visit Harbin weather in January.
September and February present strikingly different weather conditions. In September, temperatures range from a minimum of 2°C (35°F) to a maximum of 29°C (84°F), with an average of 16°C (61°F). The month experiences substantial rainfall, with about 104 mm (4.1 in) of precipitation over 11 days and high humidity levels at 84%. In contrast, February sees significantly colder temperatures, with a minimum of -32°C (-25°F) and a maximum of 10°C (50°F), averaging -13°C (9°F). This winter month is much drier, receiving only 8 mm (0.3 in) of precipitation over just 2 days, and the humidity drops to 66%. For a more detailed look at February weather specifics, you can visit Harbin weather in February.
When comparing the weather in September and March, significant differences in temperature and precipitation are evident. September experiences milder temperatures, with minimums around 2°C (35°F) and maximums reaching up to 29°C (84°F), creating an average temperature of 16°C (61°F). The month is relatively wet, with 104 mm of precipitation over about 11 days, contributing to a high humidity level of 84%. In contrast, March is considerably colder, with temperatures ranging from a minimum of -28°C (-18°F) to a maximum of 21°C (70°F), and an average of -2°C (29°F). This month sees much less precipitation, totaling only 17 mm over 5 days and a lower humidity of 61%. For those interested in the specifics of March weather, you can find more information here: Harbin weather in March.
When comparing the weather in September and April, notable differences emerge. September boasts a relatively mild average temperature of 16°C (61°F), with maximums reaching up to 29°C (84°F), while April features a cooler average of 8°C (47°F) and temperatures that can drop as low as -9°C (17°F). Precipitation is another contrast, as September sees 104 mm (4.1 in) of rainfall over 11 days, whereas April experiences much lighter rains, totaling only 22 mm (0.9 in) across just 4 days. Additionally, September's humidity is significantly higher at 84%, compared to April's more comfortable 60%. For more detailed information, you can explore Harbin weather in April.
September and May offer distinct weather experiences. In September, temperatures vary from a cool 2°C (35°F) at night to a warm 29°C (84°F) during the day, with an average temperature of 16°C (61°F). However, it is marked by higher humidity at 84% and increased precipitation of 104 mm (4.1 in) over about 11 days. In contrast, May features slightly milder temperatures, ranging from a low of 0°C (33°F) to a high of 34°C (93°F), with a similar average of 16°C (60°F). May is drier, with only 76 mm (3.0 in) of rainfall occurring across about 10 days and lower humidity at 65%. For a deeper insight into May's climate, you can check Harbin weather in May.
September weather contrasts notably with June, showcasing a cooler temperature range. In September, temperatures drop significantly, with a minimum of 2°C (35°F) and an average of 16°C (61°F), while June boasts warmer conditions, starting at a minimum of 9°C (48°F) and averaging 20°C (69°F). Both months experience similar precipitation levels, with September seeing 104 mm (4.1 in) across 11 days and June receiving slightly more at 107 mm (4.2 in) over 14 days. Humidity also differs slightly, as September is more humid at 84%, compared to June’s 79%. For further details, explore Harbin weather in June.
In comparison to July, September experiences significantly cooler temperatures, with minimums dropping to 2°C (35°F) and average highs reaching only 29°C (84°F), compared to July's warmer range of 14°C (57°F) to a maximum of 34°C (94°F). While both months share a high humidity level of 84%, September sees less precipitation overall, accumulating 104 mm (4.1 in) over 11 days, compared to July's heavier rainfall of 156 mm (6.2 in) over 16 days. For more details on July weather, you can check out Harbin weather in July.
In comparing the weather conditions in September and August, September generally experiences cooler temperatures, with a minimum of 2°C (35°F) and an average of 16°C (61°F), compared to August, which has a minimum of 7°C (45°F) and a much warmer average of 22°C (71°F). While September peaks at 29°C (84°F), August can reach up to 32°C (90°F). Additionally, September has more frequent precipitation, with 104 mm (4.1 in) falling over 11 days, whereas August sees heavier rainfall at 176 mm (6.9 in) across 17 days. Humidity levels remain relatively high in both months, with September at 84% and August slightly higher at 87%. For more detailed information, visit Harbin weather in August.
September in Harbin features a broader temperature range, with minimums around 2°C (35°F) and maximums peaking at 29°C (84°F), alongside an average of 16°C (61°F). The month experiences significant precipitation, totaling 104 mm (4.1 in) over 11 days, contributing to a higher humidity level of 84%. In contrast, October sees a notable drop in temperatures, with minimums dipping to -9°C (16°F) and an average of only 7°C (45°F), while still reaching a maximum of 28°C (84°F). Precipitation decreases sharply to 23 mm (0.9 in) across just 5 days, resulting in slightly lower humidity at 81%. For more details about the October weather in Harbin, you can visit Harbin weather in October.
September and November present stark contrasts in weather conditions. In September, temperatures range from a mild 2°C (35°F) at night to a warm 29°C (84°F) during the day, with an average of 16°C (61°F). This month also sees considerable precipitation, totaling 104 mm (4.1 inches) over 11 days, coupled with high humidity at 84%. In contrast, November ushers in much colder temperatures, with lows plummeting to -22°C (-7°F) and averages around -4°C (25°F), while daytime highs reach only 15°C (59°F). Rainfall is significantly reduced, totaling just 27 mm (1.1 inches) over 4 days, and humidity levels drop to 65%. For more details, you can check Harbin weather in November.
Comparing the weather in September and December reveals a stark contrast. September experiences mild temperatures, ranging from a minimum of 2°C (35°F) to a maximum of 29°C (84°F), with an average of 16°C (61°F). The month sees considerable precipitation, totaling 104 mm (4.1 in) over 11 days, and a high humidity level of 84%. In contrast, December is characterized by much colder conditions, with temperatures plunging to a minimum of -29°C (-19°F) and averaging -15°C (6°F), while the maximum temperature reaches only 8°C (46°F). Precipitation in December is minimal, with just 9 mm (0.4 in) occurring over a single day, and humidity drops to 53%. For more detailed insights on December weather, you can visit Harbin weather in December.
As September unfolds in Harbin, the weather transforms into a refreshing blend that marks the transition from summer's heat to autumn's crispness. With an average temperature around 16°C (61°F), this month offers a pleasant respite from the summer peaks, while a few warmer days can still reach 29°C (84°F), delighting those who crave lingering warmth. However, the increasing humidity—hovering around 84%—and frequent rains, accumulating to over 104 mm, contribute to a unique atmosphere often absent in the drier summer months. While precipitation is common, with about 11 rainy days throughout the month, this pattern sets September apart, inviting visitors to experience the wet yet vibrant charm of Harbin. For a deeper insight into seasonal shifts, check out Harbin Climate.