Fog in Visby

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 5 hours of dense fog here (10-year average).

Measured at Visby Airport (ESSV). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
ESSVVisby Airport127 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 Visby fogs in

Fog here concentrates in March and September — about 127 hours in a typical year at ESSV, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the ESSV station page.

Fog season

January: ~9 hJanFebruary: ~13 hFebMarch: ~22 hMarApril: ~10 hAprMay: ~10 hMayJune: ~4 hJunJuly: ~7 hJulAugust: ~5 hAugSeptember: ~14 hSepOctober: ~10 hOctNovember: ~13 hNovDecember: ~9 hDec
Fog season is January, February, March, April, May, July, September, October, November, December, peaking in March; fog is mostly a 10 PM–7 AM phenomenon; typically thinning out by 10 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.