According to NOAA's official record keeping station closest to Yelm at Olympia Regional Airport,
July 21st recorded that date's hottest temperature on record at 101 F (38 C), breaking the former record for which this writer was here and experienced the 96 F (36 C) this date recorded in 1994.
The all time high for July 20th is 102 (39 C) also set in 1994 and is the hottest temperature ever recorded during any month of July.
Olympia's hottest all-time high temperature ever was recorded on August 9, 1981 of 104 F (40 C). Today's temperature was 3 degrees from a tie for the all-time record high.
The Olympian filed this report on the triple-digit weather.