title: OpenWeatherMap returns incorrect current weather
body: <p>I'm trying to implement an iphone app and i'm integration OpenWeatherMap to retrieve the current weather.  However, I've noticed the data returned is incorrect (off by about 39 degree Fahrenheit).</p>
  
  <p>Below is the JSON URL i'm using to retrieve current weather for Denver, Usa using Lan/Lon coordinates where xxxxxxxxxxxxx is my APPID key.</p>
  
  <pre><code>http://api.openweathermap.org/data/2.5/weather?APPID=xxxxxxxxxxxxx&amp;lat=39.738539&amp;lon=-104.981114
  </code></pre>
  
  <p>The temperature returned was 291.05988.  From documentation read, this temperature unit is Kelvin.  So to convert to Fahrenhiet, I take 291.05988 - 254.928 = 36.13188 degree Fahrenheit. However, the true current weather is 75 degree Fahrenheit.  This is off by about 39 degrees. </p>
  
  <p>Please advise what I'm doing wrong.</p>
  
  <p>Thanks
  Loc</p>