sensors | awk '/^Physical id 0:/ { s = $4; sub(/^+/, "", s); print s; exit }'

coretemp-isa-0000
Adapter: ISA adapter
Physical id 0:  +45.0°C  (high = +80.0°C, crit = +100.0°C)
...

sensors | awk '/^Physical id 0:/ { sub(/^+/, "", $4); print $4; exit }'

set-option -g status-right "#( sensors | awk \' /Physical id 0:/ {  sub\(/+/,"",$4\); print $4; exit }  \')"

#!/bin/bash
sensors | awk '/^Physical id 0:/ { sub(/^+/, "", $4); print $4; exit }'

set-option -g status-right "#(bash ~/bin/tmux-status.bash)"

set-option -g status-interval 30