Last updated: August 21, 2025
In September, Izumo, Japan experiences a blend of warmth and humidity, with maximum temperatures soaring to 34°C (93°F), while the average settles at a comfortable 23°C (74°F). Nighttime brings a refreshing coolness, with minimum temperatures dipping to 15°C (59°F). This month is also characterized by substantial rainfall, accumulating to 226 mm (8.9 in) over 15 days, resulting in a humid environment with levels reaching 87%. Visitors to Izumo during this time should be prepared for both heat and moisture, making it a unique experience of Japan's transitional climate.
In September, Izumo, Japan experiences a pleasant transition from the heat of summer to the cooler embrace of autumn. With minimum temperatures averaging around 15°C (59°F) and reaching a comfortable maximum of 34°C (93°F), this month heralds a change in the air while still offering warm days. The average temperature settles at a delightful 23°C (74°F), making it an ideal time for outdoor exploration or cultural festivities. As the summer heat begins to wane, residents and visitors alike can enjoy the vibrant scenery and mild weather, marking September as a distinctive and inviting period in Izumo’s climatic calendar.
In September, Izumo, Japan, experiences a significant shift in its precipitation patterns, with an average rainfall of 226 mm (8.9 in) over 15 days. This marks a notable decrease from the previous months, particularly July's peak of 290 mm (11.4 in) and August's 252 mm (9.9 in), showcasing the region's manifestation of the late summer monsoon season. As autumn approaches, the declining precipitation not only signals a transition but also brings a refreshing change to the landscape, as lush greenery begins to give way to the warmer tones of fall. The rainfall this month creates a unique atmosphere, illustrating the dynamic climate of Izumo while providing vital moisture for the transition into the drier months ahead.
In September, Izumo experiences a notable dip in humidity, settling at 87% after the sweltering summer months. This slight decrease from the 92% of August brings a welcome shift in the air, signaling the transition into autumn while still retaining a sense of moisture. As the month unfolds, humidity levels continue to hover in the high range, reflective of the regions rich climate. The trend from mid-summer's peak humidity begins to taper off, suggesting that although the oppressive heat may linger in the air, the onset of fall is just around the corner. This pattern of high humidity during the warmer months, followed by a gradual decline into October, illustrates Izumo's unique atmospheric rhythm shaped by the changing seasons.
As summer transitions to autumn in Izumo, Japan, the UV Index for September stands at 10, falling within the very high exposure category and necessitating caution with a burn time of just 15 minutes. This represents a slight decrease from the extreme levels observed in July and August (both at 12), yet still requires protective measures during outdoor activities. The trend indicates that while the UV Index began the year at a moderate 4 in January, it sharply climbed to an extreme 11 by April and maintained high levels throughout the summer months. As we move into October, anticipate a further drop to 7, paving the way for safer sun exposure. For those planning activities under the sun, staying informed is crucial—check the latest details at Izumo UV Index.
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As September unfolds in Izumo, Japan, residents bask in the warm embrace of 253 hours of sunshine, a delightful retreat from the summer's peak brilliance. This month maintains a favorable glow, following August's impressive 304 hours, yet still marks a decline as the days grow shorter. The gradual decrease in daylight hours is a poetic reminder of the seasonal transition, as September's sunshine begins to lead into the cooler months of October and November. Notably, the sunniest spells earlier in the year, especially in May and June, set a vibrant backdrop that enriches the cultural and natural beauty of the region. With each passing month, the rhythm of sunlight weaves a captivating narrative of change, hinting at the tranquil beauty that autumn brings to Izumo.
In September, Izumo, Japan, experiences a 32% chance of sunny weather, which reflects a slight improvement after the typically overcast summer months. As the summer gives way to autumn, the likelihood of sunshine gradually increases, moving from the low of 25% seen in both July and August. While September may not offer the highest probability of sunny days—October, for instance, boasts a more favorable 49%—it does signal a transition toward clearer skies. This month serves as a bridge, hinting at the bright and pleasant autumn days to come, making it an intriguing time for visitors seeking a mix of summer warmth and the early changes of fall.
As September unfolds in Izumo, Japan, daylight begins to wane after the vibrant summer months. Residents enjoy 12 hours of daylight, a gentle decline from the peak of 14 hours reached in June, July, and August. This transitional month hints at the approaching autumn, where daylight hours steadily decrease, dropping to 11 hours in October and 10 hours in November. The shift from the brightness of summer to the cozy embrace of fall brings a comforting rhythm to life in Izumo, reminding us of the cyclical nature of the seasons.
As summer gives way to autumn, September in Izumo, Japan, sees a gentle shift in wind patterns, with an average wind speed of 3.0 m/s (7 mph), mirroring the light breezes of August. This reprieve from the stronger winds of earlier months, such as January's peak at 4.3 m/s (10 mph), reflects a transitional period where nature begins to exhale after the heat of summer. Following September, a subtle decline in wind speeds occurs, dipping slightly to 2.9 m/s (6 mph) in October. Interestingly, this pattern of decreasing winds continues until winter approaches, yet September retains a sense of balance, offering a pleasant atmosphere as the landscape shifts into vibrant autumn hues.
Weather in Izumo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Izumo, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present striking contrasts in weather patterns. In September, temperatures are considerably warmer, ranging from a minimum of 15°C (59°F) to a maximum of 34°C (93°F), with an average of 23°C (74°F). The month is also characterized by high humidity at 87% and significant rainfall, with 226 mm (8.9 in) spread over 15 days. In stark contrast, January experiences chilly conditions, with temperatures dropping to a minimum of -4°C (24°F) and peaking at 15°C (59°F), resulting in an average of only 5°C (42°F). Precipitation is less frequent in January, totaling 84 mm (3.3 in) over 14 days, and humidity remains lower at 82%. For more details, you can explore Izumo weather in January.
September and February showcase stark contrasts in weather patterns. In September, temperatures range from a minimum of 15°C (59°F) to a maximum of 34°C (93°F), with an average of 23°C (74°F). The month is often marked by high humidity at 87% and substantial rainfall, receiving about 226 mm (8.9 in) over 15 days. In contrast, February experiences much colder temperatures, with a minimum of -8°C (19°F) and a maximum of 19°C (67°F), leading to an average of only 6°C (42°F). Precipitation is significantly lower at 89 mm (3.5 in), distributed over 14 days, and humidity slightly decreases to 79%. For a closer look at the February conditions in Izumo, you can refer to Izumo weather in February.
September and March exhibit contrasting weather patterns that highlight the transition between late summer and early spring. In September, temperatures range from a mild 15°C (59°F) at night to a scorching 34°C (93°F) during the day, with an average of 23°C (74°F). The month is characterized by high humidity at 87% and significant precipitation, with 226 mm (8.9 in) falling over 15 days. In contrast, March experiences much cooler temperatures, with a minimum of 1°C (34°F), an average of 9°C (49°F), and a maximum of 21°C (70°F). Precipitation in March is lower, totaling 125 mm (4.9 in) over 13 days, and humidity is reduced to 73%. Overall, September feels much warmer and more humid, while March brings a definite chill and a fresh ambiance. For a more detailed look at the climate during March, visit Izumo weather in March.
September and April exhibit distinct differences in weather patterns. September showcases warmer temperatures, with averages ranging from a minimum of 15°C (59°F) to a maximum of 34°C (93°F), while April is considerably cooler, averaging between 2°C (35°F) and 24°C (75°F). Additionally, September experiences higher humidity levels at 87% compared to April's 74%, contributing to a more sultry atmosphere. Rainfall is also more abundant in September, totaling 226 mm (8.9 in) over approximately 15 days, whereas April sees only 113 mm (4.5 in) of precipitation over 10 days. For a closer look at the weather specifics in April, you can visit Izumo weather in April.
In September, the weather is notably warmer, with average temperatures ranging from a minimum of 15°C (59°F) to a maximum of 34°C (93°F), compared to May, where temperatures range from 8°C (47°F) to 27°C (82°F). September also sees significantly more precipitation, with 226 mm (8.9 in) falling over 15 days, while May only experiences 97 mm (3.8 in) over 8 days. Despite slightly higher humidity levels in September at 87%, both months maintain similar humidity levels, with May at 84%. For a detailed look at the weather in May, you can visit Izumo weather in May.
In comparing the weather between September and June, September tends to be warmer, with an average temperature of 23°C (74°F) compared to June's 22°C (71°F). The maximum temperatures also rise slightly, reaching up to 34°C (93°F) in September, while June peaks at 32°C (90°F). Both months experience considerable rainfall, but September sees more precipitation at 226 mm (8.9 in) over 15 days, versus June's 173 mm (6.8 in) over 13 days. The humidity remains high in both months, with September at 87% and June at 86%. For a closer look at Izumo's weather in June, you can visit Izumo weather in June.
September and July exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 15°C (59°F) to a maximum of 34°C (93°F), giving an average of 23°C (74°F), which is cooler than July's average of 26°C (79°F) with minimums and maximums of 19°C (67°F) and 35°C (94°F), respectively. Additionally, September experiences 226 mm (8.9 in) of precipitation over 15 days, while July sees more rainfall at 290 mm (11.4 in) across 18 days. Humidity levels are slightly lower in September at 87% compared to July's 92%. For more specific details about July's weather, you can check Izumo weather in July.
In comparing the weather of September and August, we see notable differences in temperature and precipitation. September experiences slightly cooler temperatures, with a minimum of 15°C (59°F) and an average of 23°C (74°F), whereas August tends to be warmer, starting with a minimum of 19°C (67°F) and averaging 28°C (82°F). The maximum temperature in August also peaks at 36°C (96°F), compared to September's max of 34°C (93°F). Precipitation in September is slightly lower at 226 mm (8.9 in) over 15 days, while August sees a total of 252 mm (9.9 in) over 14 days, indicating that both months experience significant rainfall but August is marginally wetter. Humidity levels are also higher in August at 92%, compared to September's 87%. For more detailed information on August weather, you can check Izumo weather in August.
September tends to be warmer and more humid than October, with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 34°C (93°F), while October sees a drop in average temperatures, with a minimum of 9°C (49°F) and a maximum of 30°C (86°F). Additionally, September experiences more precipitation, accumulating 226 mm (8.9 in) over 15 days, compared to October's 150 mm (5.9 in) over 12 days. Humidity levels remain fairly close, with September at 87% and October slightly lower at 85%. For more detailed information, you can refer to Izumo weather in October.
September weather is characterized by warm temperatures, with lows of 15°C (59°F) and highs reaching up to 34°C (93°F), creating an average of 23°C (74°F). It also sees considerable rainfall, accumulating 226 mm (8.9 in) over 15 days, alongside high humidity levels at 87%. In contrast, November experiences a significant drop in temperature, with a minimum of 4°C (39°F) and an average of 13°C (55°F). The maximum temperature is milder at 24°C (76°F). Rainfall is much lighter, totaling 53 mm (2.1 in) over just 9 days, and humidity slightly decreases to 84%. For more detailed information, you can visit Izumo weather in November.
September and December present strikingly different weather conditions. In September, temperatures soar with a minimum of 15°C (59°F) and an average of 23°C (74°F), peaking at a scorching 34°C (93°F). This month, known for its high humidity at 87%, also experiences significant rainfall, totaling 226 mm (8.9 in) over 15 rainy days. In contrast, December brings a much cooler climate, with temperatures dropping to a minimum of 0°C (32°F) and an average of just 7°C (46°F), while the maximum reaches a mild 21°C (69°F). Precipitation in December is lower, totaling 105 mm (4.1 in) over 18 days, and humidity slightly decreases to 82%. For more on December weather specifics, please check Izumo weather in December.
As September arrives in Izumo, the weather showcases a unique blend of warmth and humidity, marking a distinct transition from the sweltering summer. With average temperatures settling comfortably around 23°C, this month feels notably milder than the peak summer heat, despite occasional highs reaching into the low 30s. However, the elevated humidity at 87% combined with frequent rainfall—averaging over half the month—adds to the lush, green scenery, making it the perfect time for nature enthusiasts. Unlike the drier summer months, September's vibrant environment offers a refreshing change, drawing visitors to experience the city's natural beauty. For more insights into the weather patterns throughout the year, check out Izumo Climate.