using ver 1.89 (also in 1.88) the module always displays "calm" (when units set to metric or imperial) or "calm (0 mph)" (when units set to both), regardless of the real windspeed (as reported by weatherroom, via click on the provided by link). the rest of the data gets displayed correctly.
weatherroom displays "notice: Weatherroom.com server and software has recently been upgraded. Please contact us if you have any issues". perhaps they changed something? i use the module for one week now and saw calm (0 mph) all those days.