Fog in Charlestown

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 55 hours of dense fog here (10-year average).

Measured at Ireland West Airport Knock (EIKN). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
EIKNIreland West Airport Knock445 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 Charlestown fogs in

Fog here concentrates in December and November — about 445 hours in a typical year at EIKN, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the EIKN station page.

Fog season

January: ~50 hJanFebruary: ~28 hFebMarch: ~23 hMarApril: ~25 hAprMay: ~13 hMayJune: ~22 hJunJuly: ~15 hJulAugust: ~55 hAugSeptember: ~37 hSepOctober: ~34 hOctNovember: ~57 hNovDecember: ~75 hDec
Fog season is January, February, March, April, June, August, September, October, November, December, peaking in December; fog is mostly a 5 AM–9 AM phenomenon; typically thinning out by noon; 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.