Last updated: March 2, 2024
The weather in Kusatsu, Japan, during September is characterized by an average temperature of 24°C (75°F). Highs can soar to 33°C (91°F), while lows may dip to 15°C (59°F). Typically, the humidity level in Kusatsu throughout September hovers around 87%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Kusatsu averages 136 mm (5.4 inches) of rainfall, typically over the course of 13 rainy days. The month enjoys an average of 12 hours 22 minutes of daylight, with the sun shining for approximately 7 hours 44 minutes each day. Additionally, there is a 26% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In September, the UV Index in Kusatsu 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 | 1 | 3 | 5 | 8 | 10 | 10 | 9 | 7 | 4 | 2 | 1 | 1 | 0 |
| Exposure | Low | Moderate | VeryHigh | High | Moderate | Low | |||||||
| Time to burn | 45 min | 30 min | 15 min | 25 min | 30 min | 45 min | |||||||