Hitting the trails is always a fun thing to do and Butterfield Trail in Llano County, Texas is a good choice. For the duration of the summertime months at Butterfield Trail temperatures are mostly in the 80's with overnight lows in the 70's. The cold days of the wintertime come with highs in the 80's; winter nights come with lows in the 70's to Butterfield Trail. The high level of rain makes Butterfield Trail a quite wet spot. Most of the rain falls throughout September, and May meanwhile is the driest month.