The graph below is growing degree days (GDD) for the Walla Walla Airport and Pasco Airport. Walla Walla on the average is warmer than Pasco. The graph below is produced with data from the National Weather Service.
The graph below compares GDD for Benton East which represents the Red Mt. AVA. The other data is from Walla Walla Community College which represents the Walla Walla AVA. Red Mt. AVA tends to be warmer than the Walla Walla AVA. This data is from Washington State University
The graph below is teh AVA GDD for the major AVA’s in Washington
