Last updated: August 23, 2025
In September, the average temperature in Sobetsu, Japan reaches a pleasant 18°C (64°F). Visitors can expect a comfortable range, with minimum temperatures dipping to 7°C (45°F) and highs reaching up to 27°C (81°F). However, be prepared for some rain, as the region sees 135 mm (5.3 in) of precipitation over approximately 14 days. With an average humidity of 88%, it's the perfect time to experience the lush atmosphere this destination has to offer!
In September in Sobetsu, the average temperature is 18°C (64°F). Maximum temperatures can reach 27°C (81°F), while the minimum can drop to as low as 7°C (45°F). This mild climate makes it a perfect time for outdoor activities and exploring the local attractions.
In Sobetsu in September, the precipitation amount is 135 mm (5.3 in) over a period of 14 days.
In Sobetsu in September, humidity is 88%. With an average temperature of 18°C (64°F), this humidity feels like you’re walking through a warm, enveloping mist, making every step slightly weighted but also refreshing, ideal for leisurely exploration but challenging for strenuous activities.
In Sobetsu in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Sobetsu.
UV Risk Categories
Weather in Sobetsu varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Sobetsu, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (24°F) | 57 mm (2.2 inches) | 84% | low |
| February Weather | -4°C (25°F) | 56 mm (2.2 inches) | 83% | moderate |
| March Weather | 1°C (34°F) | 88 mm (3.5 inches) | 81% | moderate |
| April Weather | 5°C (42°F) | 96 mm (3.8 inches) | 81% | high |
| May Weather | 11°C (52°F) | 88 mm (3.5 inches) | 86% | very high |
| June Weather | 15°C (59°F) | 122 mm (4.8 inches) | 87% | very high |
| July Weather | 19°C (66°F) | 97 mm (3.8 inches) | 93% | very high |
| August Weather | 20°C (69°F) | 175 mm (6.9 inches) | 95% | very high |
| September Weather | 18°C (64°F) | 135 mm (5.3 inches) | 88% | very high |
| October Weather | 12°C (54°F) | 129 mm (5.1 inches) | 83% | high |
| November Weather | 5°C (42°F) | 106 mm (4.2 inches) | 79% | moderate |
| December Weather | -2°C (29°F) | 66 mm (2.6 inches) | 80% | low |