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 temp of 64°F, while the coldest months are January and December with an average of 27°F. The snowiest months in Arroyo Hondo are January, March, November, and December, with each month seeing an average of 10 inches of snowfall.