#!/bin/bash

urlencode() {
    # urlencode <string>
    old_lc_collate=$LC_COLLATE
    LC_COLLATE=C

    local length="${#1}"
    for ((i = 0; i < length; i++)); do
        local c="${1:i:1}"
        case $c in
        [a-zA-Z0-9.~_-]) printf "$c" ;;
        *) printf '%%%02X' "'$c" ;;
        esac
    done

    LC_COLLATE=$old_lc_collate
}

location=$(urlencode "${1:-St Helens}")
curl -s https://wttr.in/$location