No chance of getting bored in Texas if you like the outdoors. Summertime at Hartman Park Trail comes with high temperatures in the 80's. When the night sets in temperatures dip down into the 70's. All through the winter highs are in the 80's with temperatures at Hartman Park Trail dipping down into the 70's during winter nights. Hartman Park Trail ordinarily gets a good deal of rain. The wettest month of the year is commonly September, that's the one that rains the most, and May meanwhile is the driest month.