Fog in Franklin, PA
daily fog outlook & 2016–2026 climatology
Some chance of fog — peaks at 20% around 5 am Monday.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly
Measured at Venango Regional Airport (KFKL). Forecast percentages for this station have passed live verification.
Measuring station
| station | airport | fog hours/yr | forecast |
|---|---|---|---|
| KFKL | Venango Regional Airport | 129 h/yr | live forecast |
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 Franklin fogs in
Fog here concentrates in September and August — about 129 hours in a typical year at KFKL, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KFKL station page.
Fog season
Fog season is February, March, May, June, July, August, September, October, November, December, peaking in September; fog is mostly a 3 AM–7 AM phenomenon; typically thinning out by 9 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.