Fog in Chiang Rai

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. dense fog (visibility under a mile) is rare here in August (10-year average).

Measured at Mae Fah Luang - Chiang Rai International Airport (VTCT). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
VTCTMae Fah Luang - Chiang Rai International Airport28 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 Chiang Rai fogs in

Fog here concentrates in December and January — about 28 hours in a typical year at VTCT, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the VTCT station page.

Fog season

January: ~6 hJanFebruary: ~1 hFebMarch: ~1 hMarApril: ~0 hAprMay: ~0 hMayJune: ~0 hJunJuly: ~0 hJulAugust: ~0 hAugSeptember: ~1 hSepOctober: ~2 hOctNovember: ~5 hNovDecember: ~14 hDec
Fog season runs November through January, peaking in December; 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.