Last updated: August 21, 2025
In Wakkanai, Japan, September presents a delightful blend of mild temperatures and refreshing humidity. With maximums reaching 27°C (82°F) and an average of 18°C (64°F), the weather invites both adventure and relaxation. However, the month is not without its showers, recording 84 mm (3.3 in) of rainfall over 11 days, contributing to an overall humidity level of 86%. While the minimum temperature dips to a cool 9°C (49°F), the vibrant landscapes of Wakkanai come alive, making it an ideal time for exploration and experiencing the autumn transition.
As autumn begins to take hold, September in Wakkanai, Japan ushers in a subtle yet noticeable shift in temperatures. With minimums around 9°C (49°F) and averages at 18°C (64°F), the early fall season provides a refreshing contrast to the sweltering warmth of summer. The days still tend to reach a pleasant 27°C (82°F), making it a delightful time for outdoor activities and appreciating the natural beauty of the region. As the month progresses, the mild temperatures mark the transitional phase before colder weather settles in, hinting at the chill that awaits in October. With this gradual cooling, September stands out as a balanced month, often celebrated for its vibrant autumn foliage and comfortable climate.
September in Wakkanai, Japan, marks a shift in the weather as the summer’s heavy rains begin to taper off. With 84 mm (3.3 in) of precipitation spread over 11 days, this month showcases a notable dip from August's peak of 144 mm (5.7 in), demonstrating a transition from the summer monsoons to a more moderate autumn pattern. As the days grow shorter, the rainfall becomes less frequent yet remains significant enough to nourish the lush landscapes of the region. This gradual increase in precipitation days, leading into October with 110 mm (4.3 in) expected over 14 days, hints at the impending chill of the winter months, as the wet season resumes its earlier momentum.
In September, Wakkanai experiences a notable shift in humidity, settling at a comfortable 86%. This marks a slight decrease from the sweltering heights of 94% typical in August, signaling the gradual transition from summer's heat to the crispness of autumn. The month showcases a pattern where humidity begins to drop after reaching its peak in the height of summer, as seen with July and August hitting 93% and 94%, respectively. Following September, humidity continues to decline, with October dropping to 79% and November further decreasing to 77%. This gradual reduction highlights Wakkanai's shift into a drier, cooler season, providing a refreshing change that many residents and visitors eagerly anticipate.
As summer transitions to autumn, September in Wakkanai, Japan, sees a notable shift in the UV Index, dropping to a high level of 7. While this is a slight decrease from the peak of 9 in the height of summer, it still signifies the need for sun protection, allowing for a burn time of 25 minutes before skin damage occurs. The move from the intense sun exposure experienced in July and August, characterized by very high levels, shows nature's gradual cooling, but caution should still be exercised. As daylight shortens and temperatures cool, it's a great reminder that UV rays can still pose risks even in the fall months. For more detailed information, check out Wakkanai UV Index.
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As summer transitions to autumn in Wakkanai, Japan, September continues to bask in the warmth of the season, offering 283 hours of sunshine. This marks a slight decrease from the sun-drenched days of July, which boasts the most sunlight at 322 hours, yet it maintains a bright presence comparable to the preceding months. Following May's peak of 301 hours, September's sunshine hints at a gradual cooling trend as the year progresses, yet it still outshines the earlier winter months. This seasonal ebb and flow highlight the balance between the lingering warmth of late summer and the forthcoming embrace of fall, making September a delightful pause in Wakkanai's yearly dance with light.
In September, Wakkanai, Japan experiences a notable shift towards sunnier days, with a 45% chance of sun gracing the skyline. This marks a peak in sunny weather compared to the earlier months of the year, where the chances fluctuated between 14% and 42%. As summer transitions to autumn, the sun begins to make a more consistent appearance, surpassing the summer months of July and August. This trend not only enhances the allure of outdoor activities but also offers a delightful respite before the cloudier months resume with October's 40% chance of sunshine. Enthusiasts of clear skies can look forward to September as an ideal time to soak in the beauty of Wakkanai’s landscapes under the sun.
As summer transitions into autumn, September in Wakkanai, Japan, offers a gentle shift in daylight, providing 12 hours of sunlight. This decrease is part of a broader trend observed throughout the year, where daylight gradually increases from 9 hours in January to a peak of 15 hours in the height of summer, specifically in June and July. Following this summer zenith, daylight begins to wane, with September marking the beginning of this downward trend. The month serves as a beautiful reminder of the changing seasons, as the daylight diminishes to 10 hours by October, paving the way toward the cozy, shorter days of winter.
As September unfolds in Wakkanai, Japan, the average wind speed takes a noticeable dip to 3.8 m/s (9 mph), marking a gentle respite compared to the bustling summer months. This decline follows a steadily decreasing trend from July's peak of 4.0 m/s (9 mph), reflecting the transition into the cooler autumn season. While the winds begin to soften, it's a striking contrast to the windier months that precede it, such as November and December, which boast averages of 6.2 m/s and 6.3 m/s respectively. Wakkanai's unique wind patterns underline the region's evolving climate, offering a serene backdrop as it prepares for the crispness of fall.
Weather in Wakkanai varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Wakkanai, focusing on differences in temperature, rainfall, humidity, and UV levels.
September weather is characterized by milder temperatures, with averages ranging from a minimum of 9°C (49°F) to a maximum of 27°C (82°F), making it a pleasant time of year. Rainfall is relatively common, occurring on about 11 days throughout the month and totaling 84 mm (3.3 in), while humidity remains high at 86%. In stark contrast, January brings much colder conditions, with temperatures plummeting to a minimum of -13°C (9°F) and peaking at just 5°C (41°F), leading to a chilly average of -4°C (24°F). Though precipitation is slightly lower at 71 mm (2.8 in), it appears over a greater number of days—18 in total—while humidity remains consistent at 87%. For more details on January weather patterns, check out Wakkanai weather in January.
September and February present strikingly different weather conditions. In September, temperatures range from a mild 9°C (49°F) at night to a warm 27°C (82°F) during the day, with an average of 18°C (64°F). This month experiences around 84 mm (3.3 in) of precipitation over 11 days, accompanied by high humidity levels of 86%. In contrast, February brings much colder temperatures, with minimums plunging to -15°C (5°F) and a maximum of only 5°C (41°F), averaging -4°C (25°F). Although February has a somewhat lower precipitation total of 69 mm (2.7 in), it spreads across 19 days, contributing to a similarly high humidity of 84%. For a deeper look at February's unique climate, check out Wakkanai weather in February.
September and March present contrasting weather patterns. In September, temperatures range from a mild 9°C (49°F) to a warm 27°C (82°F), with an average of 18°C (64°F). The month sees about 84 mm (3.3 in) of rainfall over 11 days, accompanied by high humidity at 86%. In stark contrast, March experiences much cooler temperatures, with a minimum of -9°C (17°F) and a maximum of 11°C (51°F), averaging around 0°C (33°F). Although the total precipitation is slightly lower at 70 mm (2.8 in), it falls over 14 days, and humidity levels are also relatively high at 83%. For more details on this chilly month, check out Wakkanai weather in March.
When comparing the weather in September and April, it's clear that September offers milder temperatures and a more comfortable atmosphere. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 27°C (82°F), with an average of 18°C (64°F). The month experiences 84 mm (3.3 in) of precipitation over about 11 days, with humidity levels at 86%. In contrast, April is significantly cooler, with temperatures ranging from a low of -6°C (22°F) to a high of 17°C (63°F) and an average of just 5°C (42°F). It receives less precipitation at 52 mm (2.0 in) across 9 days and has slightly lower humidity at 84%. For a closer look at April weather, you can check Wakkanai weather in April.
September typically experiences milder temperatures compared to May, with averages ranging from a minimum of 9°C (49°F) to a maximum of 27°C (82°F). In contrast, May starts with cooler temperatures, with minimums around 1°C (35°F) and a maximum of 21°C (70°F). Both months see similar levels of precipitation, with September slightly higher at 84 mm (3.3 in) over 11 days, while May has 75 mm (3.0 in) over 10 days. Additionally, humidity levels are fairly high in both months, with September at 86% and May at 88%. To learn more specifics about the weather in May, check out Wakkanai weather in May.
In comparing the weather between September and June, September tends to be warmer overall, with average temperatures reaching 18°C (64°F) compared to June's 13°C (55°F). The maximum temperatures in September can climb to 27°C (82°F), whereas June sees a peak of 22°C (71°F). Both months experience similar levels of precipitation, with September receiving 84 mm (3.3 in) and June just slightly less at 79 mm (3.1 in), both spread over 11 days. Additionally, humidity levels are quite high in both months, with September at 86% and June slightly higher at 88%. For a closer look at June's weather specifics, you can check out Wakkanai weather in June.
In comparing the weather between July and September, both months exhibit mild minimum temperatures, starting at around 9°C (49°F). However, July tends to be slightly warmer overall, with average and maximum temperatures reaching 18°C (65°F) and 30°C (86°F), respectively, compared to September's averages of 18°C (64°F) and a maximum of 27°C (82°F). Precipitation levels are relatively close, with July experiencing 90 mm (3.5 in) over 8 days, while September has slightly less at 84 mm (3.3 in) over 11 days. Humidity is noticeably higher in July at 93%, compared to September’s 86%. For more detailed information about July weather specifically, you can check Wakkanai weather in July.
In comparing the weather of September and August, September features a noticeable drop in minimum temperatures, with lows around 9°C (49°F) compared to August's more moderate 14°C (57°F). The average temperatures remain relatively close, at 18°C (64°F) in September versus 19°C (67°F) in August. However, September offers slightly more comfortable maximum temperatures, peaking at 27°C (82°F), just shy of August's high of 28°C (84°F). Precipitation also decreases in September, receiving 84 mm (3.3 in) over 11 days, while August is considerably wetter with 144 mm (5.7 in) across 13 days. Humidity levels are higher in August at 94%, compared to 86% in September. For a detailed look at weather conditions, check out Wakkanai weather in August.
September typically showcases a range of warmer temperatures with a minimum of 9°C (49°F) and an average of 18°C (64°F), reaching highs of 27°C (82°F). The month experiences 84 mm (3.3 in) of precipitation over 11 days, accompanied by high humidity levels at 86%. In contrast, October ushers in cooler weather with minimum temperatures dropping to 3°C (38°F) and an average of 12°C (54°F), peaking at 21°C (70°F). The month sees increased rainfall with 110 mm (4.3 in) accumulated over 14 days, and humidity decreases slightly to 79%. For more detailed information on weather patterns, check out Wakkanai weather in October.
In September, the weather is typically mild, with temperatures ranging from a minimum of 9°C (49°F) to a maximum of 27°C (82°F), and an average of 18°C (64°F). The humidity is relatively high at 86%, with precipitation totaling 84 mm (3.3 inches) over approximately 11 days. In contrast, November brings a significant chill, with temperatures dropping to a minimum of -6°C (21°F) and averaging just 5°C (41°F) while peaking at 16°C (60°F). The month experiences increased precipitation at 118 mm (4.6 inches), spread across about 19 days, and the humidity decreases to 77%. For more detailed climate information, you can check Wakkanai weather in November.
In September, the weather is relatively mild, with temperatures ranging from a minimum of 9°C (49°F) to a maximum of 27°C (82°F) and an average of 18°C (64°F). The month sees a total precipitation of 84 mm (3.3 in) over approximately 11 days, accompanied by a high humidity level of 86%. In contrast, December brings much colder conditions, with temperatures dropping to a minimum of -12°C (10°F) and peaking at 11°C (52°F), averaging around -2°C (29°F). This month is notably wetter, recording 107 mm (4.2 in) of precipitation over 24 days, though humidity is slightly lower at 83%. For more detailed insights into December weather, you can check Wakkanai weather in December.
As September arrives in Wakkanai, the weather shifts into a more temperate rhythm, shedding the summer heat while still offering pleasant days. Temperatures cool down, with comfortable highs and refreshing lows, making it a perfect time for outdoor exploration. However, be prepared for occasional rain, as September experiences a noticeable increase in precipitation compared to the drier summer months, bringing a lushness to the landscape. With humidity levels remaining relatively high, the air can feel quite crisp and invigorating, creating a beautiful backdrop for the changing seasons. For those wanting to delve deeper into Wakkanai's climate patterns, check out Wakkanai Climate.