Fog in Lanzhou (Yongdeng)

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 Lanzhou Zhongchuan International Airport (ZLLL). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
ZLLLLanzhou Zhongchuan International Airport15 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 Lanzhou (Yongdeng) fogs in

Fog here concentrates in March and September — about 15 hours in a typical year at ZLLL, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the ZLLL station page.

Fog season

January: ~0 hJanFebruary: ~1 hFebMarch: ~4 hMarApril: ~1 hAprMay: ~1 hMayJune: ~1 hJunJuly: ~1 hJulAugust: ~1 hAugSeptember: ~2 hSepOctober: ~2 hOctNovember: ~1 hNovDecember: ~0 hDec
Fog season is March, September, October, peaking in March; fog is mostly a 7 AM–9 AM phenomenon; typically thinning out by 10 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.