Last updated: August 21, 2025
September in Nagoya, Japan showcases a remarkable transition from the summer heat to the onset of autumn. With maximum temperatures reaching a sweltering 38°C (101°F) and an average of 25°C (77°F), the month can still feel quite warm. However, it also brings refreshing changes, as temperatures dip to a minimum of 12°C (53°F). The city experiences a notable 165 mm (6.5 in) of rainfall over 16 days, contributing to a humidity level of 87%, creating a tropical atmosphere. This blend of warmth and moisture makes September a unique time to experience the vibrant culture and landscapes of Nagoya.
In September, Nagoya, Japan, begins to transition away from the sweltering summer heat, yet still retains warmth with an average temperature of 25°C (77°F). The month experiences a marked drop in the minimum temperature to 12°C (53°F), offering a pleasant reprieve from the peak summer highs. Daytime peaks can soar up to 38°C (101°F), reminiscent of August’s extremes, but the overall trend hints at a cooling down as autumn approaches. As the days get shorter and the humidity recedes, September is an enticing time for visitors to experience the vibrant city without the overwhelming heat, making it a perfect blend of lingering warmth and the promise of cooler evenings.
September in Nagoya, Japan, sees a notable transition in weather, with precipitation measuring 165 mm (6.5 in) over 16 days. This marks a shift from the intense summer rains of July, which recorded a peak of 295 mm (11.6 in), and reflects the city's gradual move from the humid, monsoon season into a more temperate autumn. Precipitation levels in September remain significant, closely following August's tally of 169 mm (6.7 in). The rhythm of rainfall becomes more frequent yet somewhat moderated, setting the stage for the upcoming month of October, where precipitation typically rises again to 210 mm (8.2 in). Overall, September serves as a bridge, gently ushering in change while maintaining a robust pattern of rainfall characteristic of Nagoya's climate.
In September, humidity levels in Nagoya, Japan, typically hover around 87%, a slight decline from the peak summer months of July and August, when the air feels particularly saturated at 93% and 91%, respectively. This gradual drop marks the transition into autumn, where the humid conditions begin to ease. Earlier in the year, humidity levels fluctuated between 79% in February to a higher 83% in May, demonstrating a marked increase as warmer temperatures set in. The consistent humidity, particularly during the peak summer season, accentuates the characteristic subtropical climate of Nagoya, while the early autumn months hint at the refreshing changes that lie ahead.
In September, the UV Index in Nagoya, Japan, stands at 10, indicating a "very high" exposure category with a burn time of 15 minutes. This slight decline from the relentless 11 seen in the peak summer months of June through August reflects the transition towards fall, but caution is still essential. As the weather begins to cool, residents should remain vigilant against skin damage, as UV levels can still pose a significant risk. This trend highlights the importance of year-round sun safety; even as temperatures drop, UV radiation remains impactful. For more detailed information, visit Nagoya UV Index.
UV Risk Categories
September in Nagoya, Japan, offers a delightful balance of sunshine with 244 hours of sunlight, signaling a gentle transition from the vibrant summer months. Following the peak of 300 hours in August, the sunlight begins to taper off, yet September still boasts a generous amount, making it one of the sunlit gems of the year. As the seasons shift, this month continues to surpass the earlier winter months, like January's 185 hours, while still maintaining a robust glow that keeps the energy alive before autumn fully sets in. With each passing month, a clear upward trend leads into the summer, showcasing the city's ability to bask in warmth and light, encouraging locals and visitors alike to enjoy the lingering days of sun.
In September, Nagoya experiences a 31% chance of sunny weather, marking a slight uptick compared to the summer months of July and August, which had lower probabilities of sunshine at 31% and 29% respectively. While the transitional shift from summer heat brings some relief, this month remains relatively cloudy. Interestingly, as fall approaches, the likelihood of sunny days begins to improve significantly, with October boasting a 59% chance, suggesting that those yearning for clearer skies might find brighter days just around the corner.
As summer fades into autumn, September in Nagoya, Japan, marks a transition with approximately 12 hours of daylight. While this month experiences a slight decline from the 14 hours enjoyed in the peak of summer, it remains brighter than the early months of the year. The gradual increase in daylight from January's 10 hours to a summer peak reflects the region's welcoming embrace of longer days as spring unfolds and blossoms into summer. As the days begin to shorten again, September offers a gentle reminder of nature's rhythm, balancing the lingering warmth of summer with the crispness of the approaching fall. The descent in daylight hours hints at the cozy evenings that October and November promise, inviting all to savor the last bright moments of the season.
As September unfurls its colors in Nagoya, Japan, the winds whisper a gentle lull, averaging a modest 1.7 m/s (4 mph). This marks a noticeable dip from the breezy months of spring and summer, reflecting the transitional phase into autumn. In tandem with July's peak calm, September's winds embody a tranquil interlude, offering a soft embrace that complements the city's vibrant, changing scenery. As the year progresses, the wind speeds are expected to gradually pick up again, promising a refreshing briskness that often accompanies the onset of October's cooler days. Overall, September stands out as a serene pause in the annual wind pattern, inviting residents and visitors alike to savor the fleeting warmth of summer's end.
Weather in Nagoya varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Nagoya, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather patterns. In September, temperatures can range from a mild 12°C (53°F) at night to a scorching 38°C (101°F) during the day, with an average of 25°C (77°F). This month also sees significant rainfall, totaling 165 mm (6.5 in) over about 16 days, while humidity remains high at 87%. In contrast, January experiences much cooler conditions, with temperatures dipping as low as -5°C (23°F) and averaging only 5°C (41°F). Precipitation is considerably lower, at 43 mm (1.7 in) over just 5 days, and humidity is slightly less at 82%. For a closer look at the weather specifics in January, visit Nagoya weather in January.
September and February present contrasting weather patterns, showcasing the diversity of seasonal climates. In September, temperatures range from a mild 12°C (53°F) at night to a sizzling 38°C (101°F) during the day, with an average of 25°C (77°F). This month also experiences high humidity at 87% and significant rainfall, accumulating 165 mm (6.5 in) over 16 days. In stark comparison, February features much cooler temperatures, with minimums dropping to -4°C (24°F) and an average of just 6°C (43°F). Although February enjoys lower precipitation levels of 52 mm (2.0 in) over only 5 days, the humidity is still relatively high at 79%. For more detailed information, check out Nagoya weather in February.
September and March present stark contrasts in weather patterns. In September, temperatures can soar with a minimum of 12°C (53°F) and a peak reaching 38°C (101°F), making the month generally warm and humid, with an average temperature of 25°C (77°F). Precipitation is also significant, with 165 mm (6.5 in) falling over 16 days, contributing to a high humidity level of 87%.
In contrast, March experiences much cooler conditions, with minimum temperatures dropping to -2°C (29°F) and a maximum of 25°C (77°F), while the average is a modest 10°C (51°F). The month sees less rainfall as well, with 126 mm (5.0 in) over just 9 days and lower humidity at 74%. This shift from the sweltering heat of September to the crisp chill of March underscores the diverse climate experiences within the same region. For more detailed insights on March weather, check out Nagoya weather in March.
When comparing the weather in September and April, notable differences emerge in both temperature and precipitation patterns. September typically experiences warmer temperatures, with a minimum of 12°C (53°F) and maximums reaching up to 38°C (101°F), while April sees a cooler range, starting at a minimum of -1°C (30°F) and peaking at 28°C (83°F). Additionally, September is marked by higher humidity at 87% and more precipitation, averaging 165 mm (6.5 in) over 16 days, compared to April's 142 mm (5.6 in) over just 9 days. This variation highlights the transitional nature of spring in April versus the late summer heat of September. For more specific details on April weather patterns, you can visit Nagoya weather in April.
September and May present contrasting weather patterns. In September, temperatures range from a minimum of 12°C (53°F) to a scorching maximum of 38°C (101°F), with an average of 25°C (77°F) and high humidity at 87%. The month experiences significant rainfall, totaling 165 mm (6.5 in) over 16 days. In contrast, May features milder temperatures, with a minimum of 5°C (41°F), an average of 20°C (68°F), and a maximum of 32°C (90°F). Although the precipitation is slightly higher in May at 173 mm (6.8 in), it falls over fewer days, only 10, and the humidity is a touch lower at 83%. For a more detailed look at May weather, you can visit Nagoya weather in May.
September and June share similar minimum temperatures, both starting at 12°C (53°F), but September experiences warmer average and maximum temperatures, peaking at 25°C (77°F) and 38°C (101°F) respectively. In contrast, June's average temperature is slightly cooler at 23°C (74°F) with a maximum of 34°C (93°F). Precipitation in September is higher, with 165 mm (6.5 in) over 16 rainy days compared to June's 148 mm (5.8 in) over 13 days. Both months have the same humidity level of 87%, creating a steamy atmosphere throughout. For more detailed insights on weather patterns, you can check Nagoya weather in June.
In comparing the weather of September and July, September tends to have cooler nights with a minimum temperature of 12°C (53°F), while July starts warmer with a minimum of 20°C (67°F). The average temperature in September is slightly higher at 25°C (77°F) compared to July's 27°C (81°F), but both months can reach maximums of 38°C (101°F) and 38°C (100°F), respectively. Precipitation differs significantly, with September experiencing 165 mm (6.5 in) over 16 days, while July sees a much wetter month with 295 mm (11.6 in) spread over 19 days. Humidity is also higher in July at 93%, compared to September’s 87%. For more detailed information, visit Nagoya weather in July.
In comparing the weather between September and August, September experiences a wider temperature range with minimums dropping to 12°C (53°F) and maximums reaching up to 38°C (101°F), while August averages slightly warmer with minimums at 19°C (67°F) and maximums at 39°C (103°F). Despite similar precipitation levels, September sees rain on 16 days with a total of 165 mm (6.5 in), while August has slightly less rainfall of 169 mm (6.7 in) over 14 days. Humidity levels are a bit lower in September at 87%, compared to August's higher 91%. For more detailed insights on August weather, you can visit Nagoya weather in August.
September weather features a broader temperature range, with minimums reaching 12°C (53°F) and maximums hitting 38°C (101°F), resulting in an average temperature of 25°C (77°F). This month also experiences significant rainfall with 165 mm (6.5 in) over 16 days, and high humidity at 87%. In contrast, October sees cooler temperatures, with a minimum of 7°C (44°F) and an average of 19°C (66°F), peaking at 32°C (90°F). Precipitation increases to 210 mm (8.2 in) over 12 days, but humidity slightly decreases to 85%. For more detailed information, visit Nagoya weather in October.
September and November present striking contrasts in weather. September boasts temperatures that range from a mild 12°C (53°F) to a scorching maximum of 38°C (101°F), with an average of 25°C (77°F). The month is also characterized by high humidity at 87% and significant rainfall, totaling 165 mm (6.5 in) over 16 days. In contrast, November sees much cooler temperatures, with lows dipping to 0°C (32°F) and an average of only 13°C (55°F). The maximum temperature is more modest at 25°C (76°F), and the month experiences considerably less precipitation, accumulating just 54 mm (2.1 in) across 6 days, with a slightly lower humidity of 83%. For more details, check out Nagoya weather in November.
September and December present a stark contrast in weather conditions. In September, temperatures can soar, with average highs reaching up to 38°C (101°F) and humidity levels peaking at 87%. The month is characterized by significant rainfall, totaling 165 mm (6.5 in) over 16 days, making it a humid and wet time of year. In contrast, December sees much cooler temperatures, with an average high of 21°C (70°F) and lows dropping to -3°C (28°F). This month is much drier, with only 51 mm (2.0 in) of precipitation over just 5 days, and humidity levels slightly lower at 83%. For those interested in knowing more about the weather in December, you can visit Nagoya weather in December.
As September unfolds in Nagoya, the weather exhibits a unique blend of warmth and humidity, setting it apart from the scorching summer months that precede it. While temperatures cool slightly, the average warmth makes it a comfortable transition into autumn. However, September is marked by increased rainfall, with precipitation occurring on nearly half the month’s days, bringing an air of freshness that rejuvenates the city. This shift in weather patterns, characterized by high humidity levels, can feel sticky but also invigorating as nature prepares for the change in seasons. For a deeper understanding of Nagoya's climate throughout the year, explore more at Nagoya Climate.