Hermiston (OR) Precipitation: Average Monthly Rainfall and Snowfall
This graph shows the average amount of rainfall per month in Hermiston (Oregon). The numbers are calculated over a 30-year period to provide a reliable average.
- Hermiston has dry periods in February, March, April, May, June, July, August, September, October and November.
- On average, December is the wettest month with 35 mm of precipitation.
- On average, July is the driest month with 3 mm of precipitation.
- The average amount of annual precipitation is 220 mm.
Current rainfall in Hermiston (OR)
partly cloudy and no rain
overcast and chance of rain
partly cloudy and no rain