Fog in Monterey, CA

daily fog outlook & 2016–2026 climatology
Fog possible — NWS guidance shows a fog signal in the next 48 hours. August typically brings about 23 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

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

Measuring station

stationairportfog hours/yrforecast
KMRYMonterey Regional Airport145 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 Monterey fogs in

Fog here concentrates in September and October — about 145 hours in a typical year at KMRY, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KMRY station page.

Fog season

January: ~7 hJanFebruary: ~3 hFebMarch: ~5 hMarApril: ~8 hAprMay: ~7 hMayJune: ~10 hJunJuly: ~20 hJulAugust: ~23 hAugSeptember: ~23 hSepOctober: ~23 hOctNovember: ~13 hNovDecember: ~7 hDec
Fog season runs April through January, peaking in August; fog is mostly a midnight–7 AM phenomenon; typically thinning out by 9 AM; 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.