Fog in Los Alamitos, CA

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 Los Alamitos Army Air Field (KSLI). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
KSLILos Alamitos Army Air Field79 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 Los Alamitos fogs in

Fog here concentrates in December and October — about 79 hours in a typical year at KSLI, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KSLI station page.

Fog season

January: ~10 hJanFebruary: ~11 hFebMarch: ~5 hMarApril: ~3 hAprMay: ~1 hMayJune: ~1 hJunJuly: ~1 hJulAugust: ~1 hAugSeptember: ~3 hSepOctober: ~13 hOctNovember: ~11 hNovDecember: ~18 hDec
Fog season runs October through March, peaking in December; fog is mostly a 1 AM–7 AM phenomenon; typically thinning out by 9 AM; a typical event lasts about 2 hours once it forms local time · 10-yr average

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