Is this weather normal in Island County?

Washington · county records since 1895, through September 2026.

Weather › Washington › Island County

11 of the last 12 months ran warmer than usual in Island County. Island County has warmed about 0.4° per decade since 1970.

This week

Usual for Oct 28 to Nov 3: highs near 55°, lows near 41°

That is the 1991 to 2020 average for these dates in Island County. The Weather Service forecast fills in below.

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usual high for the datewarmercooler

The last 12 months

Oct: +0.7°OctNov: +3.1°NovDec: +4.2°DecJan 2026: +2.2°JanFeb: +2.2°FebMar: +0.2°MarApr: +1.7°AprMay: +2.6°MayJun: +2.3°JunJul: +0.7°JulAug: +1.4°AugSep: -1.4°Sepwarmercooler

Each bar is a month's average temperature against the usual for that month (1991 to 2020). Ranks compare the same month in every year since 1895.

Every year since 1895

18952025

Rain and drought

Oct: -0.2 inOctNov: -0.1 inNovDec: +1.0 inDecJan 2026: -1.3 inJanFeb: -0.8 inFebMar: +1.8 inMarApr: -0.4 inAprMay: -0.5 inMayJun: -0.2 inJunJul: -0.4 inJulAug: -0.2 inAugSep: +0.1 inSepwetterdrier

Rain and melted snow against the usual for each month. The drought reading is NOAA's Palmer index for the county.

Month by month in Island County

MonthUsual high / lowUsual rainWarmestColdest
January46° / 36°3.4 in45.4° 201024.6° 1950
February49° / 35°2.5 in47.6° 201532.8° 1936
March53° / 38°2.7 in49.4° 201538.9° 1897
April58° / 41°2.2 in53.9° 201643.7° 1920
May63° / 46°1.9 in59.0° 202349.8° 1955
June68° / 50°1.5 in63.3° 202154.7° 1901
July73° / 53°0.8 in65.9° 201558.1° 1955
August73° / 53°0.9 in66.7° 202258.3° 1910
September68° / 50°1.4 in62.3° 202554.6° 1896
October59° / 44°2.8 in56.0° 201447.0° 1919
November51° / 39°4.0 in50.0° 189934.1° 1985
December46° / 35°3.5 in45.8° 193933.9° 1983

Warmest and coldest are the month's whole-month average temperature, with the year it happened.

Towns in Island County

Crime Radar: Mount Vernon, Anacortes, Oak Harbor, Port Townsend, Sequim, Stanwood

Nearby counties