Fog in South Lake Tahoe, 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 Lake Tahoe Airport (KTVL). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
KTVLLake Tahoe Airport67 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 South Lake Tahoe fogs in

Fog here concentrates in December and February — about 67 hours in a typical year at KTVL, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KTVL station page.

Fog season

January: ~10 hJanFebruary: ~12 hFebMarch: ~10 hMarApril: ~4 hAprMay: ~2 hMayJune: ~0 hJunJuly: ~0 hJulAugust: ~1 hAugSeptember: ~0 hSepOctober: ~5 hOctNovember: ~4 hNovDecember: ~18 hDec
Fog season is January, February, March, October, December, peaking in December; fog is mostly a 7 AM–7 PM phenomenon; typically thinning out by midnight; 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.