Don't forget that it is possible to open jpeg files and edit them with the Raw editor of Photoshop.
Here's what you have to do:
Open Photoshop
Click <File<open
Select your jpeg file and then in the dialog box in the bottom, click format and select Camera Raw in the selection box.
Bingo, your jpeg file will be opened with all Camera raw edition possibilities, including the precious color temperature adjustment.
Hope this helps.
Don't forget that it is possible to open jpeg files and edit them with the Raw editor of Photoshop.
Here's what you have to do:
Open Photoshop
Click <File<open
Select your jpeg file and then in the dialog box in the bottom, click format and select Camera Raw in the selection box.
Bingo, your jpeg file will be opened with all Camera raw edition possibilities, including the precious color temperature adjustment.
Hope this helps.