Fog in Beaver Falls, PA

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. 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 Beaver County Airport (KBVI). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
KBVIBeaver County Airport55 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 Beaver Falls fogs in

Fog here concentrates in December and January — about 55 hours in a typical year at KBVI, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KBVI station page.

Fog season

January: ~7 hJanFebruary: ~6 hFebMarch: ~3 hMarApril: ~1 hAprMay: ~4 hMayJune: ~3 hJunJuly: ~6 hJulAugust: ~5 hAugSeptember: ~2 hSepOctober: ~4 hOctNovember: ~6 hNovDecember: ~10 hDec
Fog season is January, February, March, May, June, July, August, October, November, December, peaking in December; fog is mostly a 3 AM–8 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.