Fog in Allentown/Bethlehem, PA

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. August typically brings about 2 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

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

Measuring station

stationairportfog hours/yrforecast
KABELehigh Valley International Airport43 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 Allentown/Bethlehem fogs in

Fog here concentrates in January and February — about 43 hours in a typical year at KABE, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KABE station page.

Fog season

January: ~8 hJanFebruary: ~7 hFebMarch: ~4 hMarApril: ~2 hAprMay: ~2 hMayJune: ~1 hJunJuly: ~1 hJulAugust: ~2 hAugSeptember: ~3 hSepOctober: ~3 hOctNovember: ~3 hNovDecember: ~7 hDec
Fog season runs August through May, peaking in January; fog is mostly a 2 AM–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.