Hurricanes and Tornadoes That Hit Dayton, WA

The nearest NOAA station with 1991–2020 climate normals is Dayton 1 WSW, WA, 2 miles west of Dayton at 1,557 feet. July is the warmest, with an average high of 88°F and low of 55°F; December is the coolest, at 41°F and 27°F. November is the wettest at 2.4 inches of precipitation on average and July the driest at 0.4 inches; the year adds up to 18.7 inches over 58 days with at least a tenth of an inch. Highs reach 90°F on about 31 days a year, almost all from June to September. Lows fall below freezing on about 113 nights a year. Snowfall averages 15.8 inches a year, most of it in January. That 18.7 inches is more than at 31 of the 86 Washington stations used on this site (36%). Pomeroy, 21 miles northeast, has its own station (Pomeroy, WA): 17.7 inches a year, 1.0 less than here, and a July average high of 85°F against 88°F.

Since 1996, the National Weather Service has logged 14 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Dayton: 8 thunderstorm wind reports, 3 flash floods and 3 floods. None is recorded as killing or injuring anyone; the NWS estimated $50,000 in property and crop damage. The strongest thunderstorm gust on record here was 70 mph, on May 30, 2020.

Flood insurance policyholders in Dayton's ZIP code 99328 have filed 55 claims with the National Flood Insurance Program since 1978, and were paid $501,000 for buildings and contents, in the dollars of each year. The most came from Flooding in 1996: 19 claims (35% of all) and $112,000. 35% 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, 73 have fewer than Dayton.