Yelm recorded no record high temperatures this month, however several record low temperatures were set:
21 was the record low on Dec. 14th
21 tied the record low on Dec. 15th
13 was the record low on Dec. 19th
10 was the record low on Dec. 20th
“He [“weather service meteorologist Jay Albrecht said”] said Sea-Tac set a record Sunday [Dec. 21] with 3 inches of snow, but that in some areas, including South Sound, records of snow are not well kept.
But South Sound officials said Saturday and Sunday’s [Dec. 20 & 21] snowfall was among the heaviest in recent history,” quoting The Olympian.
“This month already is thought to be the snowiest December on record in the Olympia area, according to the National Weather Service in Seattle. Between 1 and 2 feet of snow has fallen since Wednesday [Dec. 17], depending on where you live in Thurston County…
The previous snowfall record for December in the Olympia area was 10 inches in 1955, according to a weather service database, Haner said.
The snowiest month on record for the Olympia area is 14.2 inches in January 1972, he said. Some areas of Thurston County have exceeded that amount, but not the Olympia area.
The weather service recorded snow depths at the Olympia Regional Airport until 1997, when it moved to automated monitoring. It now relies on a network of weather spotters to measure snow depth. There’s no reliable way to measure snow depth using an automated system, Haner said,” quoting The Olympian.