Although weather is just one factor, it can really affect your travel plans, especially when you're planning an extended stay in Okawa-mura. The hottest months are usually August and July, with an average temperature of 24°C, while the coldest months are January and February, with an average of 6°C. The rainiest months in Okawa-mura are June, July, September and August, with each month seeing an average of 273 mm of rainfall.