Fog in Salmon, ID

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 Lemhi County Airport (KSMN). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
KSMNLemhi County Airport33 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 Salmon fogs in

Fog here concentrates in January and December — about 33 hours in a typical year at KSMN, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KSMN station page.

Fog season

January: ~14 hJanFebruary: ~3 hFebMarch: ~1 hMarApril: ~0 hAprMay: ~1 hMayJune: ~0 hJunJuly: ~0 hJulAugust: ~0 hAugSeptember: ~1 hSepOctober: ~1 hOctNovember: ~4 hNovDecember: ~7 hDec
Fog season runs November through January, peaking in January; fog is mostly a 7 AM–9 AM phenomenon; typically thinning out by 11 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.