Hurricanes and Tornadoes That Hit Cosmopolis, WA

The nearest NOAA station with 1991–2020 climate normals is Aberdeen, WA, 8 miles northwest of Cosmopolis at 10 feet. August is the warmest, with an average high of 69°F and low of 54°F; December is the coolest, at 47°F and 37°F. January is the wettest at 13.9 inches of precipitation on average and July the driest at 0.9 inches; the year adds up to 85.0 inches over 133 days with at least a tenth of an inch. Highs reach 90°F on about 2 days a year. Lows fall below freezing on about 35 nights a year. Snowfall averages 0.5 inches a year, most of it in March and November. That 85.0 inches is more than at 82 of the 86 Washington stations used on this site (95%). Montesano, 10 miles northeast, has its own station (Elma, WA): 72.1 inches a year, 12.9 less than here, and an August average high of 80°F against 69°F.

Water temperature at the NOAA tide station Toke Point, WA, 19 miles southwest, averaged 63°F in August and 47°F in February over 2021–2025. No month averaged 80°F. Sea level at the Toke Point tide gauge, 19 miles from Cosmopolis, has risen 0.18 ± 0.13 inches per decade from 1973 to 2025, NOAA's linear trend; at that pace it is 1.8 inches in a hundred years. That is faster than at 19 of the 144 U.S. gauges with a NOAA trend.

Flood insurance policyholders in Cosmopolis's ZIP code 98537 have filed 11 claims with the National Flood Insurance Program since 1986, and were paid $147,000 for buildings and contents, in the dollars of each year. 18% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 128 Washington cities on this site with 10 or more claims, 3 have fewer than Cosmopolis.