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Climate data for Olympia Regional Airport, Washington (1991−2020 normals, extremes 1948−present) ; Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Record high °F (°C)
Average monthly precipitation (in mm) for selected cities in Asia ; City Country Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ref. Mawsynram: India: 133.0 8.3 15.7 27.4 29.8 26.0 5.7
Climate chart for Olympia Olympia averages 50 inches (1,270 mm) of precipitation annually and has a year-round average of 75% cloud cover. Annual precipitation has ranged from 29.92 in (760 mm) in 1952 to 66.71 in (1,694 mm) in 1950; for water year (October 1 – September 30) precipitation, the range is 32.71 in (831 mm) in 2000–01 to 72.57 ...
Record-breaking rain that month led to a devastating flood. The rainiest Jan. 23 was in 1996 with 1.57 inches of rain. By contrast, the NWS recorded 0.45 inches of rain Tuesday , and 0 inches ...
Researchers realized they lacked real-time information to predict flooding, so they enlisted volunteers to put up rain gauges and regularly report precipitation. It functions the same way today.
The historical average rainfall for the month of December is 5.72 inches in Seattle and 5.77 inches in Portland," explained AccuWeather Meteorologist Elizabeth Danco.
Washington experiences extensive variation in rainfall. Rainfall in Washington varies dramatically going from east to west. The Olympic Peninsula's western side receives as much as 160 inches (4,100 mm) of precipitation annually, making it the wettest area of the 48 conterminous states and a temperate rainforest. Weeks may pass without a clear day.
The initial version of Global Historical Climatology Network was developed in the summer of 1992. [3] This first version, known as Version 1 was a collaboration between research stations and data sets alike to the World Weather Records program and the World Monthly Surface Station Climatology from the National Center for Atmospheric Research. [4]