ENMS — Mosjøen Airport; Kjærstad

fog forecast & climatology · Mosjøen city page · full 10-year analysis →
No fog forecast feed exists for this station. September typically brings about 12 hours of dense fog here (10-year average).

Fog hours per year
69 h below CAT I minima (2016–2026 average)
Fog season
October and August
Typical fog event
~1 h once it forms (middle half 1–2 h, n=296)
Data through
2026-08-15 · machine-readable data.json

When this airport fogs in

In a typical year Mosjøen Airport; Kjærstad spends 69 hours below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), concentrated in October and August. The strip above shows the hour-by-hour pattern for the current month from ten years of weather observations.

Fog season

January: ~5 hJanFebruary: ~6 hFebMarch: ~4 hMarApril: ~1 hAprMay: ~0 hMayJune: ~4 hJunJuly: ~4 hJulAugust: ~15 hAugSeptember: ~12 hSepOctober: ~21 hOctNovember: ~12 hNovDecember: ~6 hDec
Fog season is February, August, September, October, November, December, peaking in October; fog is mostly a 11 PM–5 AM phenomenon; typically thinning out by 9 AM; 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.