CYVV — Wiarton Airport

fog forecast & climatology · Wiarton city page · full 10-year analysis →
No fog signal in NWS guidance for the next 48 hours. September typically brings about 3 hours of dense fog here.forecast cycle 2026-09-04T13:00:00Z · page rebuilt daily · live layers below update hourly

Fog hours per year
63 h below CAT I minima (2016–2026 average)
Fog season
January and February
Typical fog event
~1 h once it forms (middle half 1–3 h, n=324)
Data through
2026-08-15 · machine-readable data.json

When this airport fogs in

In a typical year Wiarton Airport spends 63 hours below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), concentrated in January and February. The strip above shows the hour-by-hour pattern for the current month from ten years of weather observations.

Fog season

January: ~11 hJanFebruary: ~8 hFebMarch: ~5 hMarApril: ~4 hAprMay: ~7 hMayJune: ~6 hJunJuly: ~5 hJulAugust: ~2 hAugSeptember: ~3 hSepOctober: ~2 hOctNovember: ~3 hNovDecember: ~7 hDec
Fog season is January, February, March, April, May, June, July, September, November, December, peaking in January; fog is mostly a 3 AM–11 AM phenomenon; typically thinning out by 7 PM; a typical event lasts about 1 hour once it forms local time · 10-yr average

For flight operations

EFVS crews: the CHASE board ranks airports by live fog status, approach lighting, go-around height and flight time from your base. Forecast probabilities publish here per-airport once the calibrated model beats climatology on live verification — receipts on the scorecard. Methodology.

Sources: NOAA/NWS National Blend of Models guidance · METAR observations 2016–2026 (Iowa Environmental Mesonet) · FAA NASR. Machine access: data.json · llms.txt. Not for operational use.