Fog in Jackson, WY

daily fog outlook & 2016–2026 climatology
Fog unlikely through Monday (peak 3%). August typically brings about 1 hour of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Jackson Hole Airport (KJAC). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
KJACJackson Hole Airport26 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 Jackson fogs in

Fog here concentrates in December and January — about 26 hours in a typical year at KJAC, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KJAC station page.

Fog season

January: ~4 hJanFebruary: ~2 hFebMarch: ~3 hMarApril: ~1 hAprMay: ~2 hMayJune: ~0 hJunJuly: ~1 hJulAugust: ~1 hAugSeptember: ~2 hSepOctober: ~2 hOctNovember: ~3 hNovDecember: ~6 hDec
Fog season is January, February, March, May, September, October, November, December, peaking in December; fog is mostly a 5 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.