<human>:  What would be the best time of the year to visit the Grand Canyon?
<bot>: The best time of year to visit the Grand Canyon is during the spring months, from March to May. These months offer mild temperatures, with average highs ranging from the upper 50s to low 80s. The days are sunny with the occasional rain shower, making it the perfect time to explore the rim trails and marvel at the views. Additionally, during this time of year, the desert wildflowers are in bloom, adding a splash of color to the vast canyon walls.