Mild Climate Ephrata has a balanced four-season climate. For current weather conditions in Ephrata, follow this link. Ephrata WA Climate Month Temperature Range (F) January: 35/26 February: 40/29 March: 51/35 April: 60/41 May: 71/49 June: 78/54 July: 88/61 August: 88/62September: 77/55 October: 60/44 November: 46/33 December: 35/24 Average Annual Precipitation Rain: 8 inches Snow: 22 inches