Rake task cannot access rails.cache

I want to call a rake task from a cron job that stores remote weather data in a cache panel. However, I must be doing something rather wrong here because I cannot find any solution through countless fruitless searches.

Let's say I define and call this task

namespace :weather do
  desc "Store weather from remote source to cache"
  task :cache do
    Rails.cache.write('weather_data', Date.today)
  end
end

      

        
        
        
      

    

I am getting the error

Anonymous modules have no name to be referenced by

      

        
        
        
      

    

This leads me to think that cache rails are not available. Rails.class output from rake file gives me a module, but Rails.cache.class returns the above error again. Do I need to include something here? Am I just hopeless on the internet? :)

Thanks in advance.