Fog in Columbus, OH

daily fog outlook & 2016–2026 climatology
Fog unlikely through Sunday (peak 1%). 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 John Glenn Columbus International Airport (KCMH). Forecast percentages for this station have passed live verification.

Measuring stations

stationairportfog hours/yrforecast
KCMHJohn Glenn Columbus International Airport24 h/yrlive forecast
KLCKRickenbacker International Airport42 h/yrlive forecast
KOSUThe Ohio State University Airport - Don Scott Field42 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 Columbus fogs in

Fog here concentrates in February and November — about 24 hours in a typical year at KCMH, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KCMH station page.

Fog season

January: ~4 hJanFebruary: ~5 hFebMarch: ~1 hMarApril: ~0 hAprMay: ~1 hMayJune: ~0 hJunJuly: ~1 hJulAugust: ~1 hAugSeptember: ~0 hSepOctober: ~3 hOctNovember: ~4 hNovDecember: ~3 hDec
Fog season runs October through February, peaking in February; fog is mostly a 2 AM–10 AM phenomenon; typically thinning out by noon; 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.