Fog in Grand Forks, ND

daily fog outlook & 2016–2026 climatology
Fog unlikely through Sunday (peak 6%). August typically brings about 5 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Grand Forks International Airport (KGFK). Forecast percentages for this station have passed live verification.

Measuring stations

stationairportfog hours/yrforecast
KGFKGrand Forks International Airport66 h/yrlive forecast
KRDRGrand Forks Air Force Base49 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 Grand Forks fogs in

Fog here concentrates in December and February — about 66 hours in a typical year at KGFK, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KGFK station page.

Fog season

January: ~8 hJanFebruary: ~9 hFebMarch: ~10 hMarApril: ~4 hAprMay: ~2 hMayJune: ~1 hJunJuly: ~2 hJulAugust: ~5 hAugSeptember: ~2 hSepOctober: ~3 hOctNovember: ~5 hNovDecember: ~15 hDec
Fog season is January, February, March, April, August, November, December, peaking in December; fog is mostly a 4 AM–11 AM phenomenon; 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.