Finally, hiking time is here again, and Santa Fe Trail in Collin County, Texas is the outdoors at it's best. A visit to Texas is not complete without some hiking. For the duration of the summer highs here at Santa Fe Trail reach the 80's with night lows in the 70's. For the period of the wintertime the highs are usually in the 80's while Santa Fe Trail nighttime low temperatures through the winter are in the 70's. Santa Fe Trail gets a large amount of water. September is the wettest month with most rain; the driest month is May.