Ruby script to print the weather. This is setup to run from cmd line for Ontario, Canada as the default area using Environment Canada.

check_weather.rb

module WeatherChecker
  require 'rubygems'
  require 'nokogiri'
  require 'open-uri'

  # Setup proxy just for this.
  # Modify this to work for your needs/setup. Remove if you aren't behind a proxy.
  system 'export http_proxy=$https_proxy'

  city_directory_url = 'https://weather.gc.ca/forecast/canada/index_e.html?id=ON'
  default_city = 'Toronto'

  ##
  # Print the city and it's 7 day forcast.
  def self.print_weather(p)
    puts p.css('title').text
    temps = p.css('.pdg-btm-0')
    temps.each do |temp|
      puts "\e[1m" + temp.css('strong').text.strip + "\e[0;32m"
      puts temp.css('td:last-child').text.strip
    end
  end

  # Check if parameter passed.
  if ARGV[0]
    begin
      # Make a request to the URL.
      page = Nokogiri::HTML(open(city_directory_url))
      # Find the city URL.
      city_link = 'https://weather.gc.ca' + page.css('a').select { |link| link.text.downcase == ARGV[0].downcase }.first['href']
      # Go to the City page.
      page = Nokogiri::HTML(open(city_link))
      print_weather(page)
    rescue
      puts 'Uh-Oh! Something went wrong. Maybe you should try again.'
    end
  else
    begin
      # Use default.
      puts "You didn't specify the city, so here is #{default_city} weather"
      # Make a request to the URL.
      page = Nokogiri::HTML(open(city_directory_url))
      # Find the city URL.
      city_link = 'https://weather.gc.ca' + page.css('a').select { |link| link.text.downcase == default_city.downcase }.first['href']
      # Go to the City page.
      page = Nokogiri::HTML(open(city_link))
      print_weather(page)
    rescue
      puts 'Uh-Oh! Something went wrong. Maybe you should try again.'
    end
  end
end