KOTH — Southwest Oregon Regional Airport

fog forecast & climatology · North Bend city page · full 10-year analysis →
Some chance of fog — peaks at 33% around 7 am Saturday.forecast cycle 2026-09-04T13:00:00Z · page rebuilt daily · live layers below update hourly

Fog hours per year
141 h below CAT I minima (2016–2026 average)
Fog season
September and November
Typical fog event
~1 h once it forms (middle half 1–3 h, n=607)
Data through
2026-08-15 · machine-readable data.json

When this airport fogs in

In a typical year Southwest Oregon Regional Airport spends 141 hours below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), concentrated in September and November. The strip above shows the hour-by-hour pattern for the current month from ten years of weather observations.

Fog season

January: ~11 hJanFebruary: ~10 hFebMarch: ~10 hMarApril: ~4 hAprMay: ~3 hMayJune: ~4 hJunJuly: ~8 hJulAugust: ~9 hAugSeptember: ~26 hSepOctober: ~20 hOctNovember: ~21 hNovDecember: ~11 hDec
Fog season runs July through March, peaking in September; fog is mostly a midnight–8 AM phenomenon; typically thinning out by 9 AM; a typical event lasts about 1 hour once it forms local time · 10-yr average

Runway infrastructure

endapproach lightsbest approachlengthRVR
05MALSRCAT I5,980 ft—
23——5,980 ft—
13——4,470 ft—
31——4,470 ft—

From FAA NASR / curated AIP Canada research. Approach-light class and minima tier drive how low an approach can be flown — details in the chase board.

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.