If you are building your own custom markup or just want to use any of the icons below, this is a handy reference to the included icon set. Use icons on an element by adding two classes, "wi" and the specific icon class listed below ex. "wi200" or "sunrise".
sunrise
sunset
wind
humidity
pressure
cloudiness
temperature metric
temperature imperial
wi200 = thunderstorm with light rain
wi201 = thunderstorm with rain
wi202 = thunderstorm with heavy rain
wi210 = light thunderstorm
wi211 = thunderstorm
wi212 = heavy thunderstorm
wi221 = ragged thunderstorm
wi230 = thunderstorm with light drizzle
wi231 = thunderstorm with drizzle
wi232 = thunderstorm with heavy drizzle
wi300 = light intensity drizzle
wi301 = drizzle
wi302 = heavy intensity drizzle
wi310 = light intensity drizzle rain
wi311 = drizzle rain
wi312 = heavy intensity drizzle rain
wi313 = shower rain and drizzle
wi314 = heavy shower rain and drizzle
wi321 = shower drizzle
wi500 = light rain
wi501 = moderate rain
wi502 = heavy intensity rain
wi503 = very heavy rain
wi504 = extreme rain
wi511 = freezing rain
wi520 = light intensity shower rain
wi521 = shower rain
wi522 = heavy intensity shower rain
wi531 = ragged shower rain
wi600 = light snow
wi601 = snow
wi602 = heavy snow
wi611 = sleet
wi612 = shower sleet
wi615 = light rain and snow
wi616 = rain and snow
wi620 = light shower snow
wi621 = shower snow
wi622 = heavy shower snow
wi701 = mist
wi711 = smoke
wi721 = haze
wi731 = sand, dust whirls
wi741 = fog
wi751 = sand
wi761 = dust
wi762 = volcanic ash
wi771 = squalls
wi781 = tornado
wi800 = clear sky
wi801 = few clouds
wi802 = scattered clouds
wi803 = broken clouds
wi804 = overcast clouds
wi900 = tornado
wi901 = tropical storm
wi902 = hurricane
wi903 = cold
wi904 = hot
wi905 = windy
wi906 = hail
wi951 = calm
wi952 = light breeze
wi953 = gentle breeze
wi954 = moderate breeze
wi955 = fresh breeze
wi956 = strong breeze
wi957 = high wind, near gale
wi958 = gale
wi959 = severe gale
wi960 = storm
wi961 = violent storm
wi962 = hurricane