Custom Search     Harlan County Lake     Harlan County Lake gets very little rain. June is the wettest month with most rain; January is when it's the driest. For the period of the summer here at Harlan County Lake, high temperatures mostly get into the 90's while overnight lows are typically in the 60's. During the wintertime the highs are generally in the 40's; after the sun is down throughout the winter temperatures at Harlan County Lake drop into the 10's. Be the first to submit input for Harlan County Lake. If you have info on Harlan County Lake, Harlan County, Nebraska please submit it here to improve this web site.          Map Detailed Map Marinas Marinas on or near Harlan County Lake Weather Local weather forecast