Last updated: March 2, 2024
The weather in Hilo, United States, during April is characterized by an average temperature of 22°C (71°F). Highs can soar to 25°C (77°F), while lows may dip to 19°C (67°F). Typically, the humidity level in Hilo throughout April hovers around 80%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In April, Hilo averages 195 mm (7.7 inches) of rainfall, typically over the course of 25 rainy days. The month enjoys an average of 12 hours 36 minutes of daylight, with the sun shining for approximately 9 hours 28 minutes each day. Additionally, there is a 42% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In April, the UV Index in Hilo reaches a maximum of 13, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 10 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 | 3 | 6 | 9 | 12 | 13 | 13 | 10 | 7 | 4 | 2 | 1 | 0 |
| Exposure | Low | Moderate | High | VeryHigh | Extreme | VeryHigh | High | Moderate | Low | ||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 10 min | 15 min | 25 min | 30 min | 45 min | ||||