Fog in Stony Rapids, SK

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

Measured at Stony Rapids Airport (CYSF). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
CYSFStony Rapids Airport93 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 Stony Rapids fogs in

Fog here concentrates in September and August — about 93 hours in a typical year at CYSF, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYSF station page.

Fog season

January: ~8 hJanFebruary: ~4 hFebMarch: ~2 hMarApril: ~1 hAprMay: ~2 hMayJune: ~2 hJunJuly: ~8 hJulAugust: ~16 hAugSeptember: ~26 hSepOctober: ~15 hOctNovember: ~7 hNovDecember: ~7 hDec
Fog season runs July through January, peaking in September; fog is mostly a 4 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.