Fog in Rhinelander, WI

daily fog outlook & 2016–2026 climatology
Some chance of fog — peaks at 24% around 4 am Monday.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Rhinelander Oneida County Airport (KRHI). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
KRHIRhinelander Oneida County Airport80 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 Rhinelander fogs in

Fog here concentrates in September and August — about 80 hours in a typical year at KRHI, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KRHI station page.

Fog season

January: ~5 hJanFebruary: ~5 hFebMarch: ~5 hMarApril: ~5 hAprMay: ~3 hMayJune: ~4 hJunJuly: ~10 hJulAugust: ~14 hAugSeptember: ~14 hSepOctober: ~6 hOctNovember: ~4 hNovDecember: ~6 hDec
Fog season runs June through April, peaking in August; fog is mostly a 3 AM–7 AM phenomenon; typically thinning out by 9 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.