Planning for the weather is a good way to make your trip to Arroyo Hondo relaxing and enjoyable, especially when you're splurging. The hottest months are usually July and June, with an average temperature of 18°C, while the coldest months are January and December, with an average of -3°C. The snowiest months in Arroyo Hondo are January, March, November and December, with each month seeing an average of 25 cm of snowfall.