Fog in Guaratinguetá

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 1 hour of dense fog here (10-year average).

Measured at Edu Chaves Field (SBGW). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
SBGWEdu Chaves Field29 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 Guaratinguetá fogs in

Fog here concentrates in June and March — about 29 hours in a typical year at SBGW, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the SBGW station page.

Fog season

January: ~0 hJanFebruary: ~1 hFebMarch: ~17 hMarApril: ~1 hAprMay: ~3 hMayJune: ~21 hJunJuly: ~3 hJulAugust: ~1 hAugSeptember: ~0 hSepOctober: ~0 hOctNovember: ~0 hNovDecember: ~0 hDec
Fog season is March, June, peaking in June; fog is mostly a 5 AM–5 AM phenomenon; typically thinning out by 6 AM; 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.