Watching the weather is serious stuff, better use bash.

temperature-alarm.sh

#!/bin/sh

alarm() {
	while :;
	do
		play ~/Loud_Alarm_Clock_Buzzer-Muk1984-493547174.wav
	done
}

while :;
do
	temp=$(ssh raspberrypi.local 'echo "scale=2; ($(cat /sys/bus/w1/devices/28-05167183beff/temperature) / 1000) * (9/5) + 32" | bc -l')
	echo $temp
	if [ $(printf %.0f $temp) -lt 55 ]; then
		alarm
	fi
	sleep 5
done

temperature-monitor.sh

#!/bin/sh

# TODO: -b, --beep when outside range.
# TODO: -c, --color for fun?
# TODO: add flag for logging `| tee -a temperature_log`

watch -n1 -d 'echo "scale=2; $(cat /sys/bus/w1/devices/28-05167183beff/temperature)/1000 * 9/5 + 32" | bc -l | sed "s/$/°F/"'