With camera menu settings in Manual mode I can go up to 30 seconds with the shutter speed without the use of a remote or wired remote switch, and also utilize the 2 second delay camera feature to avoid camera shake during a long exposure.
If you want to do longer exposures than 30 seconds you will need to be in Bulb mode and have a remote device (shutter control) to avoid camera shake.
The IR remotes are battery dependent and may lose power quickly in lower temperatures. That is why I have a wired remote that plugs into the camera and derives its power from the camera battery. A shortcut to the wired remote I have is below. I use it with my K-3II or K-5IIS.
Vello RS-C1II Wired Remote Switch for Select Cameras RS-C1II B&H