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Even as return-to-office (RTO) mandates continue to accumulate, December operates on a different rhythm – shaped as much by holiday flexibility and inclement weather as by formal policy. We dove into the data to see how office attendance reflected these dynamics this year.
The Quietest Month
In December 2025, visits to office buildings nationwide were 33.1% below 2019 levels – 36.2% below when accounting for working days – the widest year-over-six-year (Yo6Y) gap seen in recent months on a per-working-day basis.
But the softness appears to reflect shifting work patterns rather than a stalled recovery. Despite slowing from recent months, December 2025 was still the busiest in-office December since COVID, suggesting that the slowdown was driven by seasonal rhythms rather than any substantive pullback in office attendance.
December has long followed a different in-office rhythm than the rest of the year – and despite return-to-office mandates, many companies likely relax on-site expectations during the holidays, allowing employees to work remotely while traveling or spending time with family. Much like the TGIF workweek, which sees a consistent drop-off in office activity on Fridays despite RTO pushes, the December dip may simply reflect the solidification of a new post-COVID seasonal norm.
Local Factors Shape the December Dip
Local factors also appear to have impacted December office attendance. Miami saw a visit gap of just 10.9% versus 2019, followed by Dallas at 18.8%. As warm-weather cities that also see the highest Friday office attendance among the analyzed markets, both may be less susceptible to holiday-adjacent work-from-home behavior.
New York City, by contrast, recorded a 19.6% visit gap, likely weighed down by harsher winter weather and an early, severe flu season. And Chicago trailed the pack with a 47.6% visit gap, pointing to a sharper seasonal pullback that may have been amplified by winter conditions, elevated flu activity, and workers opting to travel to warmer destinations during the holidays.
Year-Over-Year Momentum Still Points Up – Especially for SF
The year-over-year (YoY) analysis further reinforces that December’s softness is seasonal rather than a reflection of a true RTO slowdown. Even after adjusting for the number of working days, nationwide office visits rose 4.9% YoY, and every tracked market posted gains.
That said, growth remained uneven across major cities. San Francisco posted the strongest YoY gains, even as it continued to trail most other analyzed markets in overall office recovery – reflecting an ongoing vibe shift in a city once defined by post-pandemic pessimism. And with the city’s AI-driven leasing boom showing no signs of slowing, that momentum appears likely to carry into 2026.
Elsewhere, YoY gains were smaller than in San Francisco but still meaningful, pointing to steady progress across markets even as recovery paths vary by city.
A New Year, New Mandates
The data suggests that December’s softening reflects predictable holiday-season flexibility rather than weakening momentum. And with several high-profile return-to-office mandates set to take effect in early 2026 – and other employers continuing to nudge attendance higher through quieter forms of “hybrid creep”– the broader office recovery appears poised to reassert itself in the new year.
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