Fog in Truckee, CA

daily fog outlook & 2016–2026 climatology
Fog unlikely through Sunday (peak 5%). August typically brings about 7 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Truckee Tahoe Airport (KTRK). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
KTRKTruckee Tahoe Airport285 h/yrlive forecast

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 Truckee fogs in

Fog here concentrates in December and January — about 285 hours in a typical year at KTRK, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KTRK station page.

Fog season

January: ~44 hJanFebruary: ~31 hFebMarch: ~18 hMarApril: ~16 hAprMay: ~25 hMayJune: ~12 hJunJuly: ~3 hJulAugust: ~7 hAugSeptember: ~17 hSepOctober: ~21 hOctNovember: ~37 hNovDecember: ~57 hDec
Fog season runs September through May, peaking in December; fog is mostly a 1 AM–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.