Last updated: March 2, 2024
The weather in Iwanai, Japan, during January is characterized by an average temperature of -4°C (25°F). Highs can soar to 3°C (37°F), while lows may dip to -12°C (11°F). Typically, the humidity level in Iwanai throughout January hovers around 84%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In January, Iwanai averages 99 mm (3.9 inches) of rainfall, typically over the course of 20 rainy days. The month enjoys an average of 9 hours 23 minutes of daylight, with the sun shining for approximately 4 hours 8 minutes each day. Additionally, there is a 25% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In January, the UV Index in Iwanai reaches a maximum of 2, indicating a level of Low exposure. The most intense UV radiation typically occurs between 10:00 and 12:00, during which unprotected skin may burn in as little as 45 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 | 1 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 0 | 0 | 0 |
| Exposure | Low | ||||||||||||
| Time to burn | 45 min | ||||||||||||