Fog in Johannesburg

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 2 hours of dense fog here (10-year average).

Measured at O.R. Tambo International Airport (FAOR). This station has climatology and live observations only.

Measuring stations

stationairportfog hours/yrforecast
FAORO.R. Tambo International Airport22 h/yrclimatology
FALALanseria International Airport7 h/yrclimatology
FAGMRand Airport14 h/yrclimatology

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 Johannesburg fogs in

Fog here concentrates in June and April — about 22 hours in a typical year at FAOR, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the FAOR station page.

Fog season

January: ~1 hJanFebruary: ~0 hFebMarch: ~3 hMarApril: ~3 hAprMay: ~3 hMayJune: ~4 hJunJuly: ~3 hJulAugust: ~2 hAugSeptember: ~1 hSepOctober: ~1 hOctNovember: ~1 hNovDecember: ~1 hDec
Fog season runs March through August, peaking in June; fog is mostly a 6 AM–8 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.