The Aeris Weather Forecast Python Sample Code demonstrates the following forecast example:
Today expect Partly Cloudy with a high temp of 66°
Tonight will be Partly Cloudy with Light Showers Likely with a low temp of 48°
Popular weather data site Weather Underground (Wunderground) has a new version of its Weather Underground API and two things are notable: its former XML service is being phased out in favor of JSON. And it has a very clear pricing structure, though there's a free version for non-commercial projects.