Last updated: March 2, 2024
The weather in Portland, United States, during August is characterized by an average temperature of 20°C (69°F). Highs can soar to 27°C (80°F), while lows may dip to 14°C (58°F). Typically, the humidity level in Portland throughout August hovers around 66%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In August, Portland averages 75 mm (3.0 inches) of rainfall, typically over the course of 9 rainy days. The month enjoys an average of 13 hours 53 minutes of daylight, with the sun shining for approximately 10 hours 49 minutes each day. Additionally, there is a 33% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In August, the UV Index in Portland reaches a maximum of 8, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 15 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 2 | 3 | 5 | 7 | 8 | 8 | 7 | 6 | 4 | 2 | 1 | 1 |
| Exposure | Low | Moderate | High | VeryHigh | High | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 25 min | 30 min | 45 min | ||||||