Fog in Charles City, IA

daily fog outlook & 2016–2026 climatology
Fog unlikely through Monday (peak 10%). August typically brings about 13 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Northeast Iowa Regional Airport (KCCY). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
KCCYNortheast Iowa Regional Airport123 h/yrlive forecast

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 Charles City fogs in

Fog here concentrates in January and December — about 123 hours in a typical year at KCCY, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KCCY station page.

Fog season

January: ~27 hJanFebruary: ~11 hFebMarch: ~10 hMarApril: ~4 hAprMay: ~4 hMayJune: ~3 hJunJuly: ~6 hJulAugust: ~13 hAugSeptember: ~6 hSepOctober: ~4 hOctNovember: ~10 hNovDecember: ~25 hDec
Fog season is January, February, March, August, November, December, peaking in January; fog is mostly a midnight–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.