On weekends the station concentrates on traditional folk, Celtic, blues, and world music including syndicated programs.

[6] Due to the crowded state of the noncommercial end of the FM dial in New England, WUMB operates at a modest 160 watts, effectively limiting its coverage area to Boston itself and its innermost suburbs.

To widen its signal, it operates a network of eight repeater stations across eastern Massachusetts and southern New Hampshire.

WUMB-FM can also be heard on the Internet at both low bit rate for those with dial up connection and in stereo for those with broadband service.

[13] WHRB (95.3 FM) in Cambridge[14] and WLYN (1360 AM) in Lynn[15] have also offered temporary WUMB simulcasts in the past during transitions to either new studios or new ownership.