Fog in Porto Alegre

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 7 hours of dense fog here (10-year average).

Measured at Porto Alegre-Salgado Filho International Airport (SBPA). This station has climatology and live observations only.

Measuring stations

stationairportfog hours/yrforecast
SBPAPorto Alegre-Salgado Filho International Airport61 h/yrclimatology
SBCOCanoas Air Force Base121 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 Porto Alegre fogs in

Fog here concentrates in June and July — about 61 hours in a typical year at SBPA, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the SBPA station page.

Fog season

January: ~0 hJanFebruary: ~0 hFebMarch: ~1 hMarApril: ~4 hAprMay: ~8 hMayJune: ~19 hJunJuly: ~18 hJulAugust: ~7 hAugSeptember: ~4 hSepOctober: ~1 hOctNovember: ~0 hNovDecember: ~0 hDec
Fog season runs May through August, peaking in June; fog is mostly a 4 AM–9 AM phenomenon; typically thinning out by 11 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.