OpenWeatherMap returns incorrect current weather

For those cruising by later, you don't need to do any conversions for Fahrenheit, you can add another query param to your request for that:

Fahrenheit: units=imperial

... also the option for Celsius: units=metric

Example being:

http://api.openweathermap.org/data/2.5/weather?q=London&appid=XXXXXX&units=imperial

Found this here.