gistfile1.txt

desc "Fetch weather"
task :fetch_weather => :environment do
  require 'nokogiri'
  require 'open-uri'

   @weathers = Weather.all
   @weathers.each do |weather|
   url = "http://kitchen.screenfeed.com/weather/both/dJlC_W1LY0-DukSjsfJV1w.xml?location=#{weather.zip}&formatter=newground"
   doc = Nokogiri::XML::Reader(open(url))

   doc.each do |node|
           puts node.value
        weather.update_attributes(:humidity => node.value)

      end

   end
end
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This code will allow you to loop through the document and either reference the name of the field or the content:

doc.xpath('//*').each do |n|
n.name // this will give you the name of the tag
n.content // this will give you the content of the tag
weather.update_attributes( n.name.to_sym => n.content) // if you want to update all the weather attributes it will be something like this
and then just close the loop with an end