We added new version of rendering styles for Weathermap API.

To get weather map layers in new predefined styles you need to add _new to the appropriate layer name like the following:

http://tile.openweathermap.org/map/{layer}_new/{z}/{x}/{y}.png?appid={api_key}

precipitation	precipitation_new
wind	wind_new
temperature	temperature_new
pressure	pressure_new

New-styled weather layers are available live on our demonstration map: http://owm.io/weathermap
Would you like to have self-customized styles to your weather map - try our Map Editor tool for applying you own styles to weather layers and combining them with base maps.