Fog in Spokane, WA

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. dense fog (visibility under a mile) is rare here in August.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Spokane International Airport (KGEG). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring stations

stationairportfog hours/yrforecast
KGEGSpokane International Airport238 h/yrverifying
KSKAFairchild Air Force Base159 h/yrverifying
KSFFFelts Field51 h/yrverifying

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 Spokane fogs in

Fog here concentrates in January and December — about 238 hours in a typical year at KGEG, usually lasting ~3 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KGEG station page.

Fog season

January: ~78 hJanFebruary: ~25 hFebMarch: ~7 hMarApril: ~1 hAprMay: ~1 hMayJune: ~0 hJunJuly: ~0 hJulAugust: ~0 hAugSeptember: ~3 hSepOctober: ~9 hOctNovember: ~50 hNovDecember: ~67 hDec
Fog season runs November through February, peaking in January; fog is mostly a 10 PM–10 AM phenomenon; typically thinning out by 1 PM; a typical event lasts about 3 hours once it forms local time · 10-yr average

Machine access: data.json · llms.txt · forecast verification. Not for operational use.