Custom weather (wttr.in) module for slstatus. The first script writes weather info into the temp file (hourly job for cron), the second one is ran by slstatus and reads the file (every 0.25s, cuz i like to update seconds in the status bar as well)

sl-wttr.sh

#!/bin/bash

printf "%s" "$(</tmp/wttr)"

wttr.sh

#!/bin/bash

# This function checks if wttr.in is available before the weather info is fetched
ck_curl() {
	curl -sf ru.wttr.in > /dev/null
}

ck_curl
if [ $? -eq 0 ]					# $? means "output of the last command"
then
	curl -s ru.wttr.in?format="%C,+%t\n" > /tmp/wttr
	wttr_net=1
else						# Non-zero output would appear both when the site \
	for (( cntr = 0; cntr < 3; cntr++ ))	#   is down and when you're physically offline
	do
		echo "Probing.  " > /tmp/wttr
		sleep 0.5
		echo "Probing.. " > /tmp/wttr
		sleep 0.5
		echo "Probing..." > /tmp/wttr
		sleep 0.5			# A wee bit of animation
	done
	ck_curl					# Online check is rerun only once, if the first check fails.
fi						#   In case you're using wifi, and the cron job runs before \
						#   it authenticates
if ! [ $wttr_net ]
then echo "Offline fr :'( " > /tmp/wttr
fi