Last updated: August 21, 2025
In Sado, Japan during September, temperatures can reach a sweltering maximum of 36°C (98°F), while the average settles around a comfortable 23°C (74°F), dipping to a minimum of 15°C (60°F) at night. Visitors can expect a total precipitation of approximately 164 mm (6.5 in) over the month, with rain making an appearance on about 14 days. The humidity lingers at a high 89%, creating a muggy environment that adds to the tropical ambiance of this picturesque island. Experience the unique blend of warm temperatures and vibrant landscapes that September offers in Sado!
September in Sado, Japan, marks a transitional phase as summer yields to autumn. During this month, temperatures are pleasantly mild, with minimums around 15°C (60°F) and averages peaking at 23°C (74°F). The maximum temperatures can reach 36°C (98°F), hinting at the lingering warmth of summer. This moderate climate not only creates a comfortable environment for outdoor activities but also invites visitors to experience the island's stunning fall foliage as the month progresses. With temperatures gradually decreasing as October approaches, September serves as a delightful bridge between the hot, humid days of summer and the cooler air of autumn, making it an ideal time to explore Sado's natural beauty.
In September, Sado, Japan experiences a significant rainfall with 164 mm (6.5 in) of precipitation, marking a notable shift as the summer months draw to a close. This amount reflects a calming yet steady transition from August’s heavier 207 mm, maintaining a considerable average rainfall with 14 days of precipitation, similar to the preceding month. As the island prepares for autumn, the rain can rejuvenate the lush landscapes, fostering a vibrant environment that contrasts with the drier spells of earlier in the year. With each passing month, a clear trend emerges: the summer months tend to bring the heaviest downpours, while the arrival of autumn introduces a gentler rhythm of rainfall, allowing for a gradual winding down of the season's wettest days.
In September, Sado, Japan, experiences a humidity level of 89%, marking a slight decline from the summer months, which peak at 92% in both July and August. This gradual decrease signals the transition into autumn, yet it remains elevated compared to the early months of the year, where humidity levels hover around the high 80s. Notably, the humid summer air lingers, indicating that while the sweltering heat may fade, the moisture remains significant. As Sado heads into October with a humidity level of 87%, the island showcases a pattern of high humidity throughout the year, especially during the warmer months, suggesting a subtropical climate that keeps the air rich and vibrant.
As summer transitions to autumn in Sado, Japan, the UV Index begins to show a slight decline. In September, the UV Index stands at 9, reflecting a very high exposure category, which means sun-seekers should be cautious about their time outdoors, with a burn time of just 15 minutes. This month follows the peak summer months of July and August, when the Index reached an extreme 11. Interestingly, as the year progresses, there’s a downward trend from August's intensity, yet Sado residents should remain vigilant, as September still demands protective measures against UV rays. For complete guidance on sun safety in Sado, check out the details here: Sado UV Index.
UV Risk Categories
As summer transitions into autumn, September in Sado, Japan offers a delightful balance of sunshine, boasting 263 hours of radiant daylight. While this marks a slight decline from the sun-soaked peak of 317 hours in August, it still embodies a noteworthy shift in the seasonal rhythm. The sunny months from April through September stand out, showcasing a progressive increase in daylight, with May leading the charge at 310 hours. As October approaches, daylight gradually recedes to 230 hours, hinting at the quieter embrace of winter ahead. This shift in sunlight reflects not just changes in the sky, but also the island’s transition into a time of rich autumn hues and serene landscapes, inviting both residents and visitors to immerse themselves in its natural beauty.
As September rolls in, Sado, Japan experiences a promising 44% chance of sunny weather, marking a notable improvement over the previous months. This month presents a slight uptick from August's 26%, suggesting a transition towards more favorable conditions as summer wanes. Interestingly, September's sunny prospects align closely with the months of April and November, both at 43% and 44% respectively, indicating a consistent trend of pleasant weather in the early autumn season. As the warm days of summer begin to fade, the increasing likelihood of sunshine in September invites outdoor exploration and appreciation of the island's natural beauty.
As September unfolds in Sado, Japan, the days begin to gradually shorten, with daylight lasting around 12 hours. This marks a transition from the peak summer months, where sunlight lingers for 14 hours, to the more subdued autumn days ahead. Following the long, bright days of June through August, September's daylight serves as a gentle reminder of the approaching seasonal shift. As the month progresses, there's a clear trend where sunlight decreases, hinting at the cozy embrace of fall that awaits, with days becoming shorter and evenings drawing in.
In September, the wind in Sado, Japan picks up slightly from the summer lull, averaging 3.2 m/s (7 mph). This marks a subtle increase after the calm of June and July, where wind speeds hovered around 2.2 m/s to 2.9 m/s. As the island transitions into autumn, the gentle breezes of September serve as a precursor to the more vigorous winds that follow, with October bringing slightly stronger gusts at 3.7 m/s (8 mph). This gradual uptick in wind speed signals a shift in the seasonal rhythm of the island, hinting at the dynamic changes that will unfold as temperatures cool and nature prepares for the winter months ahead.
Weather in Sado varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Sado, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present strikingly different weather patterns. In September, temperatures range from a minimum of 15°C (60°F) to a sweltering maximum of 36°C (98°F), with an average of 23°C (74°F). The month experiences considerable rainfall, totaling 164 mm (6.5 in) across 14 rainy days, and humidity remains high at 89%. In contrast, January brings a much colder climate, with temperatures plummeting to a minimum of -5°C (24°F) and peaking at just 13°C (56°F), averaging around 4°C (39°F). While it sees less rainfall overall at 130 mm (5.1 in), January has a higher number of rainy days, totaling 20, with humidity slightly lower at 88%. For more details about the weather in January, you can visit Sado weather in January.
September and February present stark contrasts in weather conditions. In September, temperatures range from a minimum of 15°C (60°F) to a maximum of 36°C (98°F), with an average of 23°C (74°F). This month is also characterized by high humidity at 89% and significant rainfall, totaling 164 mm (6.5 in) over 14 days. In contrast, February offers much cooler temperatures, with a minimum of -3°C (28°F) and a maximum of 14°C (58°F), averaging just 4°C (40°F). While precipitation is less than in September at 105 mm (4.1 in), it spans 19 days, contributing to the overall frigid atmosphere. For more insights on February weather specifics, check Sado weather in February.
In comparing September and March weather, it's clear that September brings warmer temperatures, with averages around 23°C (74°F) and highs reaching up to 36°C (98°F), while March experiences much cooler conditions, averaging only 8°C (46°F) and peaking at 18°C (64°F). September is also characterized by higher humidity levels at 89%, contrasting with March's more comfortable 81%. Additionally, September sees more precipitation, totaling 164 mm (6.5 in) over 14 days, compared to the 101 mm (4.0 in) of rain spread across 16 days in March. For more details on March weather, you can check out Sado weather in March.
When comparing the weather in September and April, it's evident that the two months present quite contrasting conditions. September boasts a much warmer climate, with average temperatures around 23°C (74°F) and maximums reaching up to 36°C (98°F), while April's temperatures range from a chilly minimum of 3°C (37°F) to a maximum of 22°C (71°F). Additionally, September experiences higher humidity levels at 89% compared to April’s 78%, making it feel more oppressive. Precipitation is notably heavier in September, totaling 164 mm (6.5 in) over 14 days, while April receives less, with 113 mm (4.5 in) over 13 days. For more detailed insights, you can check this link: Sado weather in April.
September and May showcase distinct weather patterns. In September, temperatures range from a minimum of 15°C (60°F) to a scorching maximum of 36°C (98°F), with an average temperature of 23°C (74°F). This month also experiences higher humidity at 89% and significant rainfall, measuring 164 mm (6.5 in) across 14 days. In contrast, May has milder conditions, featuring temperatures that vary from a minimum of 7°C (45°F) to a maximum of 29°C (84°F), with an average of 17°C (62°F). Precipitation is lower in May, totaling 90 mm (3.5 in) over 12 days, and the humidity is slightly lower at 81%. For more insights into Sado's weather in May, visit Sado weather in May.
In comparing the weather between September and June, one can observe notable differences. September typically features higher temperatures, with a minimum of 15°C (60°F) and a maximum soaring to 36°C (98°F), while June experiences milder temperatures, ranging from a minimum of 13°C (56°F) to a maximum of 28°C (83°F). Additionally, September brings more precipitation, averaging 164 mm (6.5 in) over about 14 rainy days, compared to June, which sees approximately 92 mm (3.6 in) of rain over 9 days. Humidity levels remain similar, hovering around 89% in September and 88% in June. For more detailed information about June weather, you can refer to Sado weather in June.
In comparing the weather between September and July, we see notable differences in temperature and precipitation. September typically experiences milder temperatures, with a minimum of 15°C (60°F), an average of 23°C (74°F), and a maximum of 36°C (98°F). In contrast, July starts off warmer, with temperatures ranging from a minimum of 20°C (68°F) to a maximum of 37°C (99°F), with an average of 25°C (78°F). When it comes to rainfall, July sees a higher precipitation level, with 256 mm (10.1 in) over about 15 days, compared to September’s 164 mm (6.5 in) over 14 days. Humidity levels are also slightly elevated in July at 92%, compared to 89% in September. For more insights on July weather, you can check Sado weather in July.
In August, the weather is generally warmer with nighttime temperatures dipping to a minimum of 19°C (67°F) and averaging around 27°C (81°F), while the maximum can reach up to 37°C (100°F). Precipitation levels are higher in August, totaling 207 mm (8.2 in) over 14 days, accompanied by a humidity level of 92%. In contrast, September experiences slightly cooler temperatures, with a minimum of 15°C (60°F) and an average of 23°C (74°F), even though the maximum can still soar to 36°C (98°F). Rainfall decreases to 164 mm (6.5 in) over the same number of rainy days, and humidity remains elevated at 89%. For more detailed information on the weather in August, you can visit Sado weather in August.
September experiences warmer temperatures, with daily averages reaching up to 23°C (74°F) and maximums soaring to 36°C (98°F). In contrast, October sees a notable drop, with an average temperature of 18°C (65°F) and a maximum of 28°C (82°F). Additionally, September tends to be slightly wetter, with 164 mm (6.5 in) of precipitation over 14 days, compared to October's 147 mm (5.8 in) over 13 days. Humidity remains high in both months, but October is marginally lower at 87% compared to September's 89%. For a more detailed look at October weather, visit Sado weather in October.
September and November present contrasting weather experiences. In September, temperatures range from a minimum of 15°C (60°F) to a scorching maximum of 36°C (98°F), with an average of 23°C (74°F). The month is characterized by high humidity at 89% and significant precipitation totaling 164 mm (6.5 in) over 14 days. In contrast, November cools down considerably, featuring a minimum temperature of 3°C (38°F) and a maximum of 21°C (71°F), with an average of 12°C (54°F). Despite experiencing precipitation on 15 days, November's rainfall is less intense at 115 mm (4.5 in) and humidity drops slightly to 85%. For a more detailed look at what to expect during this time, check out Sado weather in November.
September and December present quite a contrast in weather conditions. In September, temperatures range from a mild 15°C (60°F) at night to highs reaching 36°C (98°F) during the day, with a warm average of 23°C (74°F). This month also sees significant rainfall, with 164 mm (6.5 in) over 14 days, accompanied by high humidity levels at 89%. In contrast, December ushers in much colder weather, with temperatures dropping to a minimum of -1°C (30°F) and an average of just 7°C (44°F). Highs reach only 17°C (64°F), and precipitation increases slightly to 179 mm (7.1 in) over 25 days, though humidity remains relatively high at 86%. For more details, check out Sado weather in December.
As September arrives on Sado Island, the weather presents a remarkable transition from the sweltering summer heat to more temperate conditions. While temperatures still reach a maximum of 36°C, the average drops to a comfortable 23°C, making it ideal for outdoor explorations. However, this month also brings increased humidity and precipitation, with 14 rainy days contributing to a lush green landscape. Compared to the drier months before, September offers a unique blend of warmth and refreshing rainfall, enticing visitors to embrace the island's beauty. For a deeper dive into the seasonal variations, check out Sado Climate.