If you are using some desktop customization tools such as Rainmeter or Samurize, just to name a few, you might need to look for the weather code for the weather forecast plugin/gadget. If you are looking for the weather.com weather code for your plugin, you are in the right place. Below covered most, if not all available weather code for Malaysia:

MYXX0001 – Batu Pahat
MYXX0002 – George Town
MYXX0003 – Ipoh
MYXX0004 – Johor Bahru
MYXX0005 – Kajang
MYXX0006 – Klang
MYXX0007 – Kuala Dungun
MYXX0008 – Kuala Lumpur
MYXX0009 – Kuala Terengganu
MYXX0010 – Kuantan
MYXX0011 – Kuching
MYXX0012 – Lundu
MYXX0013 – Melaka
MYXX0014 – Muar
MYXX0015 – Pekan
MYXX0016 – Segamat
MYXX0017 – Seremban
MYXX0018 – Serian
MYXX0019 – Sibu
MYXX0020 – Simanggang
MYXX0021 – Teluk Intan
MYXX0022 – Penang/Bayan Lepas
MYXX0023 – Kota Bharu
MYXX0024 – Sitiawan
MYXX0025 – Bintulu
MYXX0026 – Miri
MYXX0027 – Labuan
MYXX0028 – Kota Kinabalu
MYXX0029 – Taw
MYXX0029 – Tawau
MYXX0030 – Sandakan
MYXX0031 – Sepang
MYXX0032 – Langkawi

Let me know if you found a better/updated version of this. Enjoy!

_{Source: lowyat.net forum}