The Kumano Kodō - Nakahechi route usually has mild weather in January, but it can vary. Daytime temperatures are around 9-12°C, and nighttime temperatures are between 4-7°C. The weather is mostly sunny, with some partly cloudy days. It can rain, but usually not much, although sometimes there may be heavier rain in certain areas.
Rain is generally light, averaging less than 2 mm per day. However, some places might have more rain than others. Most of the time, you will experience sunny and partly cloudy weather, but cloudy skies and light rain may also happen occasionally.
In short, the weather on the route is generally mild and stable, with light rain from time to time. You can expect a mix of sunny, partly cloudy, and sometimes overcast days, with daytime temperatures around the low teens and cooler evenings.
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