The best time to visit Grants, New Mexico, is during the spring and autumn months, specifically from April to May and September to October. These periods offer the most pleasant weather for exploring the area.During spring, the temperatures are mild, typically ranging from 15°C to 25°C, making it comfortable for outdoor activities like hiking and visiting national monuments. The landscape begins to green, and you'll avoid the intense heat of summer and the colder temperatures of winter.Autumn also provides agreeable weather, with temperatures similar to spring. The advantage of visiting in autumn is the potential for beautiful fall foliage in some of the higher elevations around Grants, and it's generally a drier period than spring, with less chance of rain.