Approximate (facultative) name of icon:

001.	day / sunny
002.	day / cloudy
003.	day / partly cloudy
004.	day / a lot of clouds
005.	day / rain
006.	day / fog
007.	light rain
008.	rain 
009.	heavy rain
010.	rain / lightning
011.	light hail
012.	hail
013.	heavy hail
014.	snow
015.	snow with rain
016.	light snow
017.	heavy snow
018.	moon / night
019.	moon / night / partly cloudy
020.	moon / night / cloudy
021.	moon / night / a lot of clouds
022.	moon / night / rain
023.	moon / night / fog
024.	tornado
025.	hurricane