The average daily room rate in Boston’s hotel industry fell to $139.01 in January, down from $152.87 in January last year, a 9.1 percent decrease. Occupancy was down 12.9 percent to 45.1 percent in January this year.

The overall RevPAR (the total bedroom revenue for the period divided by the total available rooms during the period) fell 20.8 percent in January over the same period last year, according to PKF Consulting’s Boston office.  

Hotels with average daily rates in excess of $200 were particularly hard hit in January, declining 25.9 percent from the prior January’s RevPAR performance.  Lowest rated hotels (under $100 average daily room rate) experienced substantially lower revenue loss, dropping 16.4 percent in RevPAR from 2008, the company said.

In terms of property size, medium-sized properties between 150 and 400 rooms were hardest hit, falling 23 percent short of RevPAR levels achieved in January 2008. While it has been widely reported that a sharp decline in corporate travel has accompanied the steadily unraveling economy, market mix year-over-year appeared to change relatively little.