Fog in Yigo

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. August typically brings about 1 hour of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Andersen Air Force Base (PGUA). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
PGUAAndersen Air Force Base7 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 Yigo fogs in

Fog here concentrates in July and September — about 7 hours in a typical year at PGUA, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the PGUA station page.

Fog season

January: ~0 hJanFebruary: ~0 hFebMarch: ~0 hMarApril: ~1 hAprMay: ~0 hMayJune: ~0 hJunJuly: ~1 hJulAugust: ~1 hAugSeptember: ~1 hSepOctober: ~1 hOctNovember: ~0 hNovDecember: ~0 hDec
Yigo has no real fog season — dense fog is rare in every month (under 2 hours even in the peak month).

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