Fog in Shemya, AK

daily fog outlook & 2016–2026 climatology
Fog possible — NWS guidance shows a fog signal in the next 48 hours. August typically brings about 94 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Eareckson Air Station (PASY). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
PASYEareckson Air Station375 h/yrverifying

Fog is measured where instruments live — airports. Hours/yr = time below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), the aviation definition of seriously dense fog.

When Shemya fogs in

Fog here concentrates in July and August — about 375 hours in a typical year at PASY, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the PASY station page.

Fog season

January: ~2 hJanFebruary: ~5 hFebMarch: ~6 hMarApril: ~6 hAprMay: ~14 hMayJune: ~53 hJunJuly: ~152 hJulAugust: ~94 hAugSeptember: ~25 hSepOctober: ~5 hOctNovember: ~4 hNovDecember: ~2 hDec
Fog season runs June through August, peaking in July; fog here can hit at any hour of the day; a typical event lasts about 1 hour once it forms local time · 10-yr average

Machine access: data.json · llms.txt · forecast verification. Not for operational use.