Last updated: August 21, 2025
Experience the September weather in Yilan, China, where temperatures range from a crisp 1°C (34°F) to a pleasant 28°C (83°F), with an average hovering around 15°C (59°F). This month witnesses a considerable precipitation amount of 92 mm (3.6 in), falling over approximately 10 days, making for a lush and vibrant landscape. With humidity levels at a high 87%, expect a refreshing atmosphere perfect for exploring the region's natural beauty. Be prepared for occasional showers as you soak in the rich culture and scenic views Yilan has to offer!
As September rolls into Yilan, China, the temperatures begin to shift noticeably, heralding the arrival of autumn. With a minimum temperature of 1°C (34°F) and an average hovering around 15°C (59°F), the chill is palpable, yet the days can still feel quite pleasant. The maximum temperature jumps up to 28°C (83°F), showcasing a lingering summer warmth before colder months set in. Compared to the peak of summer, where July and August enjoy highs around 35°C (96°F) and 32°C (89°F), September marks a definitive transition towards cooler days, setting the stage for crisp mornings and invigorating evenings. As the month progresses, the contrast between lingering warmth and emerging chill becomes an enchanting reminder of nature's seasonal rhythm.
September in Yilan, China, marks a transitional phase in the yearly climate pattern, characterized by a notable precipitation total of 92 mm (3.6 in) over approximately 10 days. While this represents a decrease from the heavy rains of August, it's still substantial, contributing to the overall wetness that defines the summer months. The consistent rainfall throughout the autumn months, particularly September's moderate levels, suggests an ongoing seasonal rhythm, with precipitation peaking earlier in the summer and gradually tapering off. As the region shifts into October, where rainfall drops to just 22 mm (0.9 in), September stands out as a bridge between the summer's abundance and the drier days ahead, highlighting the dynamic nature of Yilan's climate.
In September, Yilan, China, experiences a humidity level of 87%, reflecting a continuation of the region’s high moisture levels established in the preceding summer months. The trend shows a peak in humidity during the warmer season, particularly in July and August, with values reaching 87% and 89% respectively. As the year transitions into autumn, September’s humidity remains substantial, slightly tapering off from the intense summer highs but still significantly above the annual average. Following this, a notable decline is expected in the coming months, as October's humidity drops to 83%, hinting at the shift towards cooler, drier conditions. This seasonal ebb and flow showcases Yilan's unique climatic patterns, where the interplay between warmth and moisture creates a distinctly humid environment.
As September rolls into Yilan, China, residents and visitors can expect a UV Index of 6, categorized as high, with a recommended burn time of 25 minutes. This marks a noticeable decrease from the peak summer months of July and August, when the UV Index was at a striking 9, indicating very high sun exposure risks. However, September still maintains a heightened level of UV intensity compared to the milder months earlier in the year. As autumn approaches, it's essential to stay vigilant against UV exposure, balancing outdoor activities with skin protection efforts. For more detailed information on UV levels throughout the year, check out Yilan UV Index.
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September in Yilan, China, brings a delightful blend of warm weather and ample sunshine, totaling 276 hours of bright skies. As summer begins to fade, this month stands out with a slight dip from August's 273 hours, yet remains significantly brighter than the winter months ahead. The gradual increase from January's 184 hours to September’s total reflects a seasonal trend of longer days, peaking in the summer with 327 hours in July. This vibrant sunshine in September invites both residents and visitors to relish outdoor activities before autumn settles in, making it a perfect time to enjoy the lingering warmth.
In Yilan, China, the likelihood of sunny weather takes a notable dip during September, with a 38% chance of sunshine. This period marks a transition from the humid summer months, where July and August see the lowest chances of clear skies at 25% and 36% respectively. Interestingly, September's sunny probabilities are slightly higher than those in June and May, but still lag behind the sunnier months of January and October, which boast chances above 50%. As autumn approaches, Yilan experiences a gradual shift toward clearer days, hinting at the promise of more favorable weather in the months to follow.
As September arrives in Yilan, China, the days begin to transition from the long, sun-filled stretches of summer toward the shorter hours of autumn. With approximately 12 hours of daylight, September marks a gradual decline from the peak of 15 hours experienced in June and July. The once heightened sunlight diminishes slightly as the days grow shorter, preparing the landscape for the cooler seasons ahead. This month serves as a bridge between the vibrant, lengthy days of summer and the crisp, quieter days of fall, capturing the essence of change as nature starts to showcase its stunning transformation.
As September arrives in Yilan, China, the wind takes on a gentle character, averaging 2.3 m/s (5 mph). This month marks a subtle decline from the breezier summer days of July and August, which recorded their lowest wind speeds of 1.7 m/s (4 mph) and 2.6 m/s (6 mph), respectively. The overall trend from late spring through the warmth of summer shows a gradual decrease in wind intensity, with the transition to September bringing a slight uptick in coolness, hinting at the approaching autumn. As the year progresses, wind speeds begin to rise again in October and November, suggesting that the invigorating breezes of fall are just around the corner, offering a refreshing change from the lighter summer winds.
Weather in Yilan varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Yilan, focusing on differences in temperature, rainfall, humidity, and UV levels.
September offers a mild climate with temperatures ranging from a chilly 1°C (34°F) at night to a warm average of 15°C (59°F), reaching as high as 28°C (83°F) during the day. While it experiences considerable precipitation at 92 mm (3.6 in) over about 10 days, the humidity remains high at 87%. In stark contrast, January presents a much harsher environment, with temperatures plunging to a minimum of -37°C (-35°F) and averaging around -17°C (1°F), peaking at just -2°C (29°F). The month sees significantly less precipitation, totaling only 5 mm (0.2 in) over a mere 1 day, and a slightly lower humidity of 84%. For more details, you can explore Yilan weather in January.
September and February present starkly different weather conditions. In September, temperatures range from a minimum of 1°C (34°F) to a maximum of 28°C (83°F), with an average of 15°C (59°F). This month experiences relatively high humidity at 87% and significant precipitation of 92 mm (3.6 in) over about 10 days. In contrast, February is characterized by frigid temperatures, with a minimum of -32°C (-25°F) and a maximum of 6°C (43°F), averaging a chilling -13°C (8°F). Precipitation is minimal in February, only totaling 8 mm (0.3 in) over just 2 days, along with slightly lower humidity at 81%. For more specific details, check Yilan weather in February.
In September, the weather is typically mild, with temperatures ranging from a minimum of 1°C (34°F) to a maximum of 28°C (83°F) and an average of 15°C (59°F). This month experiences significant precipitation, averaging 92 mm (3.6 in) over about 10 days, alongside high humidity levels at 87%. In contrast, March is much colder, with temperatures plummeting to a minimum of -26°C (-15°F) and averaging -3°C (28°F), rising only to a maximum of 18°C (64°F). Precipitation is sparse in March, totaling just 22 mm (0.9 in) over 4 days, and the humidity is lower at 75%. For a more detailed look into the weather in March, you can check Yilan weather in March.
Comparing the weather in September and April reveals distinct seasonal differences. In September, temperatures range from a minimum of 1°C (34°F) to a maximum of 28°C (83°F), with an average temperature of 15°C (59°F). The month experiences relatively high humidity at 87% and receives about 92 mm (3.6 in) of precipitation over 10 days. In contrast, April presents cooler temperatures, with a minimum of -9°C (16°F) and an average of 7°C (45°F), peaking at 25°C (78°F). Additionally, April sees significantly less rainfall, with only 34 mm (1.4 in) falling across 7 days and a lower humidity level of 67%. For more detailed insights into April weather, check out Yilan weather in April.
September and May exhibit distinct weather patterns, each with unique characteristics. In September, temperatures range from a chilly 1°C (34°F) at night to a warm 28°C (83°F) during the day, averaging around 15°C (59°F). The month sees considerable precipitation, totaling 92 mm (3.6 in) over 10 days, accompanied by high humidity levels of 87%.
In contrast, May tends to be slightly milder with temperatures ranging from 0°C (33°F) to a peak of 31°C (89°F), averaging 14°C (58°F). Although it experiences slightly less rainfall at 78 mm (3.1 in) over 12 days, the lower humidity at 69% gives it a more comfortable feel. For more details on May's weather, visit Yilan weather in May.
In comparing the weather of September and June, September tends to have a broader temperature range, with minimums dipping to 1°C (34°F) and maximums reaching 28°C (83°F), whereas June experiences a milder range, from 7°C (45°F) to 33°C (91°F). With an average temperature of 15°C (59°F), September feels cooler compared to June's warmer average of 19°C (66°F). Additionally, September receives less precipitation (92 mm or 3.6 in) than June (103 mm or 4.1 in), though it still sees rain on about 10 days compared to June's 15 days. Interestingly, September's higher humidity at 87% adds to its cool, damp feel, while June has a relative humidity of 81%. For more insights into June's climate in Yilan, check out Yilan weather in June.
In comparing the weather of September and July, September showcases a broader temperature range, with a minimum of 1°C (34°F) and a maximum of 28°C (83°F), resulting in an average of 15°C (59°F). In contrast, July is significantly warmer, featuring a minimum of 13°C (55°F) and peaking at 35°C (96°F), with an average temperature of 24°C (75°F). Both months experience high humidity levels of 87%, but September has slightly more precipitation, totaling 92 mm (3.6 in) over 10 days, compared to July's 87 mm (3.4 in) over 13 days. For more detailed insights into July's weather, you can visit Yilan weather in July.
In comparing the weather between September and August, we notice a significant drop in temperatures as September features a minimum of 1°C (34°F) and an average of 15°C (59°F), while August maintains a milder range with a minimum of 8°C (46°F) and an average of 21°C (69°F). Additionally, August experiences higher maximum temperatures, peaking at 32°C (89°F), compared to September's maximum of 28°C (83°F). Precipitation is also noteworthy, with August receiving 162 mm (6.4 in) over 14 days, making it much wetter than September, which sees 92 mm (3.6 in) across just 10 days. Humidity levels remain similar, with August at 89% and September slightly lower at 87%. For more specific details, you can refer to Yilan weather in August.
September experiences a milder range of temperatures, with minimums around 1°C (34°F) and daily averages peaking at 15°C (59°F), while October brings significantly cooler temperatures, dropping to a minimum of -8°C (18°F) and a lower average of 6°C (44°F). Both months can reach a maximum of 28°C (83°F), but October sees a marked reduction in precipitation, with only 22 mm (0.9 in) over five days compared to September's 92 mm (3.6 in) over ten days. Humidity remains relatively high in both months, though it decreases slightly from September's 87% to October's 83%. For a more detailed look at Yilan's October weather, check out Yilan weather in October.
September and November present stark contrasts in weather. September typically experiences mild temperatures, ranging from a minimum of 1°C (34°F) to a pleasant maximum of 28°C (83°F), with an average of 15°C (59°F). It also faces considerable rainfall, recording 92 mm (3.6 in) over about 10 days, accompanied by high humidity at 87%. In contrast, November ushers in much colder conditions, with temperatures dipping as low as -21°C (-5°F) and averaging -4°C (25°F), while peaking at a maximum of 13°C (56°F). Precipitation decreases significantly to 31 mm (1.2 in), spread across just 5 days, and humidity falls to a more comfortable 67%. The transition from September to November marks a shift from a mild, humid climate to a frigid, drier atmosphere. For more details, you can check out Yilan weather in November.
September weather presents a warm transition into fall, with average temperatures ranging from a mild 1°C (34°F) at night to a comfortable 28°C (83°F) during the day, accompanied by significant humidity at 87%. Rainfall is relatively high, with about 92 mm (3.6 in) falling over approximately 10 days, creating a lush late-summer environment.
In contrast, December brings a stark transformation, as temperatures plummet dramatically, with nighttime lows reaching -29°C (-20°F) and daytime highs only reaching up to 7°C (45°F). The precipitation decreases significantly to just 10 mm (0.4 in) over about 2 days, and the humidity drops to 72%, contributing to the crisp, cold air typical of winter. For a detailed overview of December weather, you can visit Yilan weather in December.
As September rolls into Yilan, the weather begins to shift noticeably from the warmer summer months. With average temperatures dipping to a refreshing 15°C, residents and visitors can appreciate a more comfortable climate, while still enjoying occasional peaks around 28°C. The increased humidity at 87% often leads to a mix of sunny days and increased precipitation, resulting in about 10 days of rain this month. This unique combination creates a vibrant and dynamic atmosphere as nature transitions into autumn. To explore more about what Yilan has to offer throughout the year, visit Yilan Climate.