Fog in Pontiac, MI

daily fog outlook & 2016–2026 climatology
Fog unlikely through Sunday (peak 10%). 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 Oakland County International Airport (KPTK). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
KPTKOakland County International Airport57 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 Pontiac fogs in

Fog here concentrates in January and December — about 57 hours in a typical year at KPTK, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KPTK station page.

Fog season

January: ~16 hJanFebruary: ~8 hFebMarch: ~5 hMarApril: ~2 hAprMay: ~0 hMayJune: ~0 hJunJuly: ~1 hJulAugust: ~1 hAugSeptember: ~3 hSepOctober: ~6 hOctNovember: ~4 hNovDecember: ~11 hDec
Fog season runs October through March, peaking in January; fog is mostly a 4 AM–8 AM phenomenon; typically thinning out by 1 PM; 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.