Last updated: March 2, 2024
The weather in Seattle, United States, during April is characterized by an average temperature of 10°C (50°F). Highs can soar to 21°C (70°F), while lows may dip to 2°C (36°F). Typically, the humidity level in Seattle throughout April hovers around 84%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In April, Seattle averages 117 mm (4.6 inches) of rainfall, typically over the course of 14 rainy days. The month enjoys an average of 13 hours 40 minutes of daylight, with the sun shining for approximately 7 hours 38 minutes each day. Additionally, there is a 50% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In April, the UV Index in Seattle reaches a maximum of 6, indicating a level of High exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 25 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 | 1 | 2 | 3 | 4 | 5 | 6 | 5 | 4 | 3 | 2 | 1 | 1 |
| Exposure | Low | Moderate | High | Moderate | Low | ||||||||
| Time to burn | 45 min | 30 min | 25 min | 30 min | 45 min | ||||||||