Statistics The wind statistics are based on real observations from the weather station at Umatilla. Climate data and weather averages in Hermiston. Average Weather in Umatilla Oregon, United States. Monthly averages Pendleton Longitude: -118.841, Latitude: 45.6951 Average weather Pendleton, OR - 97801. Monthly: 1981-2010 normals History: 2007-2019 Over the course of the year, the temperature typically varies from 27°F to 93°F and is rarely below 13°F or above 102°F. Get the monthly weather forecast for Hermiston, OR, including daily high/low, historical averages, to help you plan ahead. Monthly average temperatures, rainfall, snow days & record high and low temperatures msn back to msn home weather records and averages powered by Microsoft News Umatilla County has an average temperature of 52.6F, which ranked #8 in Oregon. It is 161% greater than the overall U.S. average. Windfinder specializes in wind, waves, tides and weather reports & forecasts for wind related sports like kitesurfing, windsurfing, surfing, sailing or paragliding. Umatilla, Oregon Climate - 97882 Weather, Average Rainfall, and Temperatures Earthquake activity: Northeast Umatilla-area historical earthquake activity is below Oregon state average. The first month of the autumn, September, is still a warm month in Umatilla, Oregon, with average temperature fluctuating between 80.8°F (27.1°C) and 48.9°F (9.4°C). On November 15, the temperature in Umatilla typically ranges from 37°F to 48°F and is rarely below 23°F or above 59°F. Based on weather reports collected during 1985–2015. Northeast Umatilla, Oregon detailed profile. Complete climate information for Umatilla, Oregon. This is the wind, wave and weather statistics for Umatilla in Oregon, United States. Earthquake activity: Umatilla-area historical earthquake activity is below Oregon state average. Find out how often it rains, snows, and the gets cold or hot in Umatilla. In Umatilla, the summers are hot and mostly clear, the winters are very cold and partly cloudy, and it is dry year round. Also the historical Umatilla County weather info such as snow/precipitations data as well as heating and cooling cost index. It is 150% greater than the overall U.S. average. Umatilla, Oregon detailed profile. Annual Weather Averages in Hermiston. Station Data. Temperature In Umatilla, the average high-temperature drops, from a tropical 90.5°F (32.5°C) in August, to a warm 80.8°F (27.1°C).The average low-temperature, in September, is 48.9°F (9.4°C).