Fog in Red Bluff, CA

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 Red Bluff Municipal Airport (KRBL). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
KRBLRed Bluff Municipal Airport37 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 Red Bluff fogs in

Fog here concentrates in December and November — about 37 hours in a typical year at KRBL, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KRBL station page.

Fog season

January: ~7 hJanFebruary: ~1 hFebMarch: ~1 hMarApril: ~0 hAprMay: ~0 hMayJune: ~0 hJunJuly: ~0 hJulAugust: ~0 hAugSeptember: ~0 hSepOctober: ~0 hOctNovember: ~8 hNovDecember: ~21 hDec
Fog season runs November through January, peaking in December; fog is mostly a 9 PM–8 AM phenomenon; typically thinning out by 10 AM; 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.