Fog in Sacramento, CA
daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. dense fog (visibility under a mile) is rare here in August.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly
Measured at Sacramento International Airport (KSMF). This station is in forecast verification — percentages publish when it clears the accuracy bar.
Measuring stations
| station | airport | fog hours/yr | forecast |
|---|---|---|---|
| KSMF | Sacramento International Airport | 107 h/yr | verifying |
| KMCC | McClellan Airfield | 102 h/yr | verifying |
| KMHR | Sacramento Mather Airport | 85 h/yr | verifying |
| KSAC | Sacramento Executive Airport | 73 h/yr | verifying |
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 Sacramento fogs in
Fog here concentrates in December and January — about 107 hours in a typical year at KSMF, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KSMF station page.
Fog season
Fog season runs November through January, peaking in December; fog is mostly a 2 AM–9 AM phenomenon; typically thinning out by 11 AM; a typical event lasts about 2 hours once it forms local time · 10-yr average
Machine access: data.json · llms.txt · forecast verification. Not for operational use.