Fog in Sand Island

daily fog outlook & 2016–2026 climatology
Forecast feed initializing for this station. August typically brings about 1 hour of dense fog here (10-year average).

Measured at Henderson Field (PMDY). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
PMDYHenderson Field4 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 Sand Island fogs in

Fog here concentrates in September and August — about 4 hours in a typical year at PMDY. Hour-by-hour patterns, live conditions and the forecast strip live on the PMDY station page.

Fog season

January: ~0 hJanFebruary: ~0 hFebMarch: ~0 hMarApril: ~0 hAprMay: ~1 hMayJune: ~1 hJunJuly: ~0 hJulAugust: ~1 hAugSeptember: ~1 hSepOctober: ~0 hOctNovember: ~0 hNovDecember: ~0 hDec
Sand Island 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.