Last updated: August 23, 2025
In Hyesan, North Korea, the average temperature in September hovers around 13°C (55°F). However, be prepared for a range of temperatures, as it can drop to a chilly -2°C (28°F) or rise to a warm 26°C (78°F). Expect about 79 mm (3.1 in) of precipitation spread over 8 days, with an average humidity level of 79%.
In September in Hyesan, the average temperature is 13°C (55°F). Maximum temperatures can reach 26°C (78°F), while the minimum can drop as low as -2°C (28°F). Be prepared for a wide range of weather conditions when planning your trip to Hyesan this month.
In Hyesan in September, the precipitation amount is 79 mm (3.1 in) during 8 days, indicating a relatively wet period for the area.
In Hyesan in September humidity is 79%. With an average temperature of 13°C (55°F), this humidity feels like a damp chill that permeates clothing, making outdoor activities slightly uncomfortable and prompting travelers to seek shelter or dress in layers to stay warm while adjusting to the moist air.
In Hyesan 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 Hyesan.
UV Risk Categories
Weather in Hyesan varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Hyesan, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -16°C (4°F) | 14 mm (0.6 inches) | 78% | moderate |
| February Weather | -13°C (9°F) | 29 mm (1.2 inches) | 71% | moderate |
| March Weather | -3°C (27°F) | 42 mm (1.6 inches) | 62% | high |
| April Weather | 4°C (40°F) | 52 mm (2.1 inches) | 65% | very high |
| May Weather | 10°C (51°F) | 109 mm (4.3 inches) | 73% | very high |
| June Weather | 15°C (59°F) | 100 mm (3.9 inches) | 83% | extreme |
| July Weather | 20°C (68°F) | 97 mm (3.8 inches) | 87% | extreme |
| August Weather | 19°C (66°F) | 187 mm (7.4 inches) | 89% | extreme |
| September Weather | 13°C (55°F) | 79 mm (3.1 inches) | 79% | very high |
| October Weather | 5°C (41°F) | 56 mm (2.2 inches) | 80% | high |
| November Weather | -4°C (25°F) | 44 mm (1.7 inches) | 69% | moderate |
| December Weather | -14°C (7°F) | 24 mm (0.9 inches) | 75% | low |