Fog in Birchwood, AK

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. August typically brings about 3 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Birchwood Airport (PABV). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
PABVBirchwood Airport95 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 Birchwood fogs in

Fog here concentrates in January and November — about 95 hours in a typical year at PABV, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the PABV station page.

Fog season

January: ~25 hJanFebruary: ~15 hFebMarch: ~5 hMarApril: ~3 hAprMay: ~0 hMayJune: ~0 hJunJuly: ~1 hJulAugust: ~3 hAugSeptember: ~4 hSepOctober: ~5 hOctNovember: ~19 hNovDecember: ~15 hDec
Fog season runs November through February, peaking in January; 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.