Fog in San Rafael

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 14 hours of dense fog here (10-year average).

Measured at Suboficial Ay Santiago Germano Airport (SAMR). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
SAMRSuboficial Ay Santiago Germano Airport39 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 San Rafael fogs in

Fog here concentrates in August and July — about 39 hours in a typical year at SAMR. Hour-by-hour patterns, live conditions and the forecast strip live on the SAMR station page.

Fog season

January: ~0 hJanFebruary: ~1 hFebMarch: ~4 hMarApril: ~1 hAprMay: ~2 hMayJune: ~7 hJunJuly: ~11 hJulAugust: ~14 hAugSeptember: ~0 hSepOctober: ~0 hOctNovember: ~1 hNovDecember: ~0 hDec
Fog season is March, June, July, August, peaking in August; fog is mostly a 7 AM–noon phenomenon; typically thinning out by 1 PM local time · 10-yr average

Machine access: data.json · llms.txt · forecast verification. Not for operational use.