Last updated: August 21, 2025
In September, Chongqing, China experiences a blend of heat and humidity, making it a vivid month for weather enthusiasts. With daytime maximum temperatures soaring to 40°C (103°F), the average hovers around a comfortable 24°C (76°F), while nights cool down to a minimum of 17°C (63°F). Rainfall is not uncommon, with a total precipitation of 169 mm (6.6 in) spread over approximately 16 days, contributing to an overall humidity level of 84%. This volatile mix of warmth and moisture sets the stage for vibrant autumn colors and a unique local climate experience.
In September, Chongqing begins a gradual transition towards cooler weather, though the remnants of summer still linger. With minimum temperatures around 17°C (63°F) and averages reaching 24°C (76°F), the month offers a comfortable warmth, ideal for outdoor activities. However, daytime highs can soar to 40°C (103°F), reminding visitors of the intense heat experienced in the preceding months of July and August. This pattern marks a shift from the peak summer temperatures, as the city starts to favor more temperate conditions, setting the stage for the upcoming autumn and a welcome reprieve from the sweltering summer heat.
September in Chongqing, China, marks a pivotal moment in the year’s precipitation trends, showcasing a substantial 169 mm (6.6 in) of rainfall, matching May’s totals. This spike contributes to the city's status as one of the wettest months, along with May and July, reflecting the region's seasonal shift as summer wanes. Interestingly, precipitation occurs over 16 days, maintaining a rhythm similar to that of August, which hints at a lingering water cycle influenced by the summer monsoon. As the city transitions towards autumn, this month serves as a bridge, where the lush greenery lush from summer rains blends with the advent of cooler temperatures, making September a particularly vibrant and dynamic time in Chongqing.
September in Chongqing, China, marks a transition in humidity levels as the summer months begin to wane. With an average humidity of 84%, September sees a slight drop from the peak of 87% experienced in August. This decrease signals the gradual shift toward more comfortable conditions, though the humidity remains fairly high compared to the beginning of the year, where it hovered around 72% in January. As the city moves into the fall, the humidity levels continue to fluctuate, reaching a notable 86% in November, yet September remains a month where the lingering warmth of summer is still felt, making it a unique blend of comfort and warmth.
In September, the UV Index in Chongqing sees a slight dip to 10, classifying it as very high and indicating a burn time of just 15 minutes. Following the intense extremes of summer, which maintained an unyielding UV Index of 11, September signals a gradual transition towards lower sun intensity as autumn approaches. This month, while still demanding caution against UV exposure, offers a reprieve compared to the scorching summer months. As the seasons shift, awareness of sunlight intensity remains crucial; for more detailed information, visit Chongqing UV Index.
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In Chongqing, China, September greets residents with a warm embrace, offering an impressive 224 hours of sunshine that reflects the peak of summer's glory. As the summer months unfold, the sunlight steadily accumulates, reaching a peak of 315 hours in August. However, as September rolls in, a slight decline begins, hinting at the transition towards autumn. This drop from August’s brightness to September's still plentiful sunshine reveals a natural rhythm in the seasons—one that encourages outdoor exploration and celebrates the last vestiges of warm weather before the cooler months approach. As temperatures begin to cool down in October, sunlight availability dips significantly to 145 hours, marking a stark contrast to the vibrant vitality of the late summer sun.
September in Chongqing, China, marks a notable transition in weather patterns, with a 37% chance of sunny days—the highest probability for sunshine since July. This month stands out amidst a generally gloomy summer, where June and August experienced only 12% and 25% chances of clear skies, respectively. The uptick in sunny weather reflects a shift towards early autumn, inviting residents and visitors alike to enjoy the milder temperatures and clearer skies. As the chances of sunshine begin to decline in October, September presents a delightful opportunity to soak up the sun before the chill of winter sets in.
As September unfolds in Chongqing, the daylight duration begins its gentle decline from the summer peak, offering around 12 hours of sunlight each day. This month signals a transition from the warm, sun-soaked days of August, where the city basked in 13 hours of illumination. As autumn approaches, the gradual decrease in daylight is mirrored by nature's changing palette, inviting the locals to relish the softer, golden light. Following September, the daylight continues to shorten, dipping to 11 hours by October. This trend reflects a rhythm of seasonal shifts, where each month subtly nudges us toward the embrace of winter, reminding us of the cyclical beauty inherent in Chongqing's climate.
As summer fades, September in Chongqing brings a refreshing change in the air, marked by a gentle uptick in average wind speed to 1.9 m/s (4 mph). This slight increase hints at the seasonal shift, as the city transitions from the sultry summer months into the more temperate fall. While winds have remained relatively calm throughout the year, September stands out as a moment where breezes become just a bit more pronounced, inviting residents to revel in the cooler atmosphere. Following the fluctuations of earlier months, this faint, invigorating whisper of wind offers a much-anticipated relief, heralding the approach of autumn and the promise of milder days ahead.
Weather in Chongqing varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Chongqing, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present starkly contrasting weather conditions. In September, the temperatures range from a minimum of 17°C (63°F) to a sweltering maximum of 40°C (103°F), with an average of 24°C (76°F). The month sees significant rainfall, with 169 mm (6.6 in) of precipitation over 16 days, contributing to a high humidity level of 84%. In contrast, January experiences much cooler temperatures, with a minimum of -2°C (29°F) and a maximum of 17°C (63°F), averaging around 9°C (48°F). Precipitation is markedly lower, at just 26 mm (1.0 in) across 6 days, and the humidity stands at 72%. For more details on January’s weather specifics, you can check Chongqing weather in January.
September and February showcase stark contrasts in weather patterns. In September, temperatures soar, with averages around 24°C (76°F) but peaking at a scorching 40°C (103°F), accompanied by high humidity at 84%. The month also sees significant rainfall, with 169 mm (6.6 in) of precipitation spread over 16 days, making it one of the wetter months. In contrast, February offers a much cooler climate, with average temperatures around 10°C (51°F) and a maximum of 27°C (81°F). Precipitation is relatively low at 35 mm (1.4 in) over just 7 days, and humidity drops to 76%. For a more detailed look at February weather, check out Chongqing weather in February.
The weather in September and March presents a stark contrast, showcasing the seasonal differences in temperature and precipitation. September typically experiences milder temperatures, with an average of 24°C (76°F) and highs reaching up to 40°C (103°F), while March offers cooler conditions, averaging just 15°C (60°F) with maximum temperatures around 33°C (92°F). Additionally, September is characterized by higher humidity levels at 84% and more substantial rainfall, with 169 mm (6.6 in) of precipitation over 16 days, compared to March's 83 mm (3.3 in) over 14 days and slightly less humidity at 80%. For a detailed look at March's weather in Chongqing, visit Chongqing weather in March.
When comparing the weather in September and April, several notable differences emerge. September generally experiences warmer temperatures, with averages around 24°C (76°F) and maximums reaching up to 40°C (103°F), while April's average is cooler at 19°C (67°F), peaking at a maximum of 36°C (97°F). Additionally, September has a higher precipitation level of 169 mm (6.6 in) over 16 days, compared to April's 115 mm (4.5 in) over 15 days. Humidity is also higher in September at 84%, while April boasts a slightly lower humidity level of 77%. For more detailed information on April weather, you can check Chongqing weather in April.
September and May in Chongqing exhibit notable differences in temperature and humidity. In September, temperatures range from a minimum of 17°C (63°F) to a maximum of 40°C (103°F), with an average of 24°C (76°F). In contrast, May features cooler temperatures, with a minimum of 12°C (54°F), an average of 22°C (73°F), and a maximum of 37°C (98°F). Both months receive similar amounts of precipitation, with 169 mm (6.6 in) spread over several rainy days—16 in September and 18 in May. Humidity levels are relatively high in both months, at 84% in September and slightly lower at 82% in May. For a more detailed look at the weather conditions during May, you can visit Chongqing weather in May.
When comparing the weather in September to that of June, we can see notable differences in temperature and precipitation patterns. In September, temperatures range from a minimum of 17°C (63°F) to a maximum of 40°C (103°F), with an average of 24°C (76°F). The month experiences substantial rainfall, totaling 169 mm (6.6 in) over 16 rainy days and humidity levels at 84%. In contrast, June has a slightly higher average temperature at 25°C (78°F), with a maximum of 36°C (97°F) and similar minimum temperatures. June has a lower precipitation total of 145 mm (5.7 in) spread over 17 rainy days, with humidity remaining comparable at 85%. For a detailed look at June's weather, you can visit Chongqing weather in June.
In comparison to July, September in Chongqing experiences slightly cooler temperatures, with an average of 24°C (76°F) compared to July's warmer average of 29°C (84°F). While both months see significant humidity levels, September's 84% is just below July's 85%. In terms of precipitation, September has a higher total of 169 mm (6.6 in) over 16 days, compared to July's 156 mm (6.1 in) over the same number of days. This suggests that September might feel more humid and rainy despite its cooler temperatures. For a detailed look at July's climate, you can refer to Chongqing weather in July.
In comparing the weather of September and August, we see notable differences. September experiences slightly cooler temperatures, with a minimum of 17°C (63°F), an average of 24°C (76°F), and a maximum of 40°C (103°F), while August has a higher minimum of 20°C (67°F), average of 30°C (86°F), and maximum reaching 42°C (108°F). Precipitation is more frequent in September, with rainfall occurring on 16 days and totaling 169 mm (6.6 in), compared to August's 14 days of rainfall and 134 mm (5.3 in). Additionally, both months have high humidity levels, with September at 84% and August slightly higher at 87%. For a detailed overview of August's weather, you can refer to Chongqing weather in August.
When comparing the weather between September and October, a noticeable shift occurs. September features warmer temperatures, with a minimum of 17°C (63°F) and an average of 24°C (76°F), while October sees a drop with temperatures ranging from a minimum of 10°C (50°F) to an average of 18°C (66°F). The maximum temperature also decreases, reaching 36°C (97°F) in October compared to September's peak of 40°C (103°F). Precipitation is slightly lower in October at 113 mm (4.5 in), down from 169 mm (6.6 in) in September, although both months experience rainfall on 16 days. Humidity remains relatively high, with September at 84% and October at 81%. For more detailed insights, check Chongqing weather in October.
September and November exhibit distinct weather characteristics, reflecting the transition from late summer to autumn. In September, temperatures range significantly, with a minimum of 17°C (63°F) and a maximum soaring up to 40°C (103°F), leading to an average of 24°C (76°F). This month is also marked by higher precipitation, totaling 169 mm (6.6 in) over 16 days, and humidity levels sitting at 84%.
Conversely, November sees cooler temperatures, with a minimum of 6°C (43°F) and an average of 14°C (57°F), peaking at 25°C (78°F). Precipitation decreases considerably to 49 mm (1.9 in) across 9 days, while humidity remains relatively high at 86%. For further details on November weather patterns, visit Chongqing weather in November.
September and December present a stark contrast in weather patterns. In September, temperatures can soar to a maximum of 40°C (103°F), with an average of 24°C (76°F) and a minimum of 17°C (63°F), creating a hot and humid atmosphere with 169 mm (6.6 in) of precipitation over 16 days. In contrast, December brings a much cooler climate with temperatures ranging from a minimum of 1°C (35°F) to a maximum of 18°C (65°F), averaging around 10°C (50°F). Additionally, December sees significantly less rainfall, with only 28 mm (1.1 in) over 7 days, and a slight decrease in humidity to 81%. For more detailed information, you can check Chongqing weather in December.
As summer transitions to autumn in Chongqing, September brings a unique blend of warmth and humidity, making it distinct from other months. With temperatures averaging 24°C and peaks occasionally soaring to 40°C, this month offers a final taste of summer before cooler days set in. However, the increase in precipitation—with about half the month seeing rain—adds a refreshing touch to the air, although it also contributes to the high humidity levels lingering at around 84%. For those planning to explore this vibrant city in September, it's essential to embrace both the heat and the showers. Find out more about what to expect throughout the year at Chongqing Climate.