Last updated: March 2, 2024
The weather in Isumi, Japan, during April is characterized by an average temperature of 15°C (59°F). Highs can soar to 20°C (69°F), while lows may dip to 8°C (46°F). Typically, the humidity level in Isumi throughout April hovers around 73%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In April, Isumi averages 117 mm (4.6 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 13 hours 5 minutes of daylight, with the sun shining for approximately 9 hours 2 minutes each day. Additionally, there is a 49% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In April, the UV Index in Isumi reaches a maximum of 10, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, 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 | 2 | 4 | 7 | 9 | 10 | 10 | 8 | 6 | 4 | 2 | 1 | 1 | 0 |
| 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 | ||||||