Fog in Fresno, CA

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. dense fog (visibility under a mile) is rare here in August.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Fresno Yosemite International Airport (KFAT). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
KFATFresno Yosemite International Airport88 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 Fresno fogs in

Fog here concentrates in December and January — about 88 hours in a typical year at KFAT, usually lasting ~3 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KFAT station page.

Fog season

January: ~31 hJanFebruary: ~4 hFebMarch: ~0 hMarApril: ~0 hAprMay: ~0 hMayJune: ~0 hJunJuly: ~0 hJulAugust: ~0 hAugSeptember: ~0 hSepOctober: ~1 hOctNovember: ~13 hNovDecember: ~40 hDec
Fog season runs November through January, peaking in December; fog is mostly a 2 AM–9 AM phenomenon; typically thinning out by 10 AM; a typical event lasts about 3 hours once it forms local time · 10-yr average

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