Explanation

Time

12:00 UTC  means  14:00 in summer   or 13:00 in winter

Temperature

15  means 15°C

15/20   means minimum temperature (in the morning) 15°C, maximum temperature (in the afternoon) 20°C

Wind

	northeast wind with speed below 5 m/s
	east wind with speed between 5-10 m/s
	northwest wind with speed 11 m/s and more

Cloudiness and weather phenomena

	wrong or without information		cloudy, rain (rain shower)		very clouded sky, freezing rain		overcast, rain and snow
	clear sky		cloudy, freezing rain		very clouded sky, rain and snow		overcast, snow shower
	slightly clouded sky		cloudy, rain and snow		very clouded sky, snow shower		overcast, snow
	half covered sky		cloudy, snow shower		very clouded sky, snow		overcast, thunderstorm
	half covered sky, rain shower		cloudy, snow		very clouded sky, thunderstorm		overcast, hail
	half covered sky, rain and snow		cloudy, thunderstorm		very clouded sky, hail		fog
	half covered sky, snow shower		cloudy, hail		overcast		fog, rain
	half covered sky, thunderstorm		very clouded sky		overcast, rain		fog, rain and snow
	cloudy		very clouded sky, rain (rain shower)		overcast, freezing rain		fog, snow