Last updated: June 24, 2025
In September, the average temperature in Dutch Harbor, United States hovers around 9°C (48°F). Expect a chilly minimum of 5°C (40°F), while the mercury can rise to a pleasant 14°C (57°F). Prepare for wet weather, as you'll encounter approximately 106 mm (4.2 in) of precipitation spread over 18 days. With an average humidity of 86%, don’t forget to pack an umbrella and a cozy sweater!
In September in Dutch Harbor, the average temperature is 9°C (48°F). The maximum can reach 14°C (57°F) and the minimum can be as low as 5°C (40°F). This mild weather makes it an ideal time for travelers to explore the sights without the summer crowds.
In Dutch Harbor in September, the precipitation amount is 106 mm (4.2 in), occurring over 18 days.
In Dutch Harbor in September, humidity is 86%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that wraps around you, making outdoor activities uncomfortable and travel less enjoyable.
In Dutch Harbor in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Dutch Harbor.
UV Risk Categories
Weather in Dutch Harbor varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Dutch Harbor, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (33°F) | 90 mm (3.5 inches) | 83% | low |
| February Weather | 2°C (35°F) | 119 mm (4.7 inches) | 84% | low |
| March Weather | 1°C (34°F) | 80 mm (3.1 inches) | 83% | moderate |
| April Weather | 2°C (37°F) | 78 mm (3.1 inches) | 84% | moderate |
| May Weather | 4°C (40°F) | 88 mm (3.5 inches) | 90% | high |
| June Weather | 7°C (45°F) | 83 mm (3.3 inches) | 93% | high |
| July Weather | 9°C (49°F) | 58 mm (2.3 inches) | 95% | very high |
| August Weather | 10°C (51°F) | 81 mm (3.2 inches) | 92% | very high |
| September Weather | 9°C (48°F) | 106 mm (4.2 inches) | 86% | moderate |
| October Weather | 6°C (43°F) | 141 mm (5.6 inches) | 82% | moderate |
| November Weather | 4°C (39°F) | 119 mm (4.7 inches) | 81% | low |
| December Weather | 2°C (35°F) | 154 mm (6.1 inches) | 82% | low |