If you planning to travel to Whitman Mission National Historic Site, Walla Walla, Washington, here is your 6-day travel weather forecast to make sure you have all the essentials needed during your stay. Start your day when the sunrises at 12:39 PM. The temperature feels like 58 with a humidity level of 58 so dress accordingly. Cloud coverage is 5 percent with visibility at 14.2 percent. Today’s UV index is 8, don’t forget the sunscreen if you need it! Today’s winds are traveling southeast at a speed of 5 MPH. At the end of the day don’t miss the sunset at 3:02 AM.