Microclimates galore
I was looking at the Wunderground map for this area. Classic example of microclimates. Within about 80 miles, you see 113 and 70. I'm not sure if the 113 is meaningful. It's not a simple error, because it's close to a 102 and 105 at the same altitude; but it could be poorly calibrated. The 70 is more likely to be valid. Lots of mountain areas are around 70.
If the 113 (at a place called Taylor Flats) is meaningful, it's getting close to record territory. According to NWS docs, the all-time high for Wash was 118 in 1961, about 10 miles south of that location.