Photo from Port of Olympia website

Indeed, the 99 degree heat record broken at Olympia Regional Airport today broke the former record of 94 degrees set in 1961.

The all time high for any July is 102 F (39 C) set in 1994. Then click TEMPERATURE under GENERAL CLIMATE SUMMARY TABLES.
Olympia's hottest all-time high temperature ever was recorded on August 9, 1981 of 104 F (40 C).