My truck was parked for a week without being started.
When I tried to start it, I realized that the battery had died.
I jump-stared it, it turned-over and started.
Later that same day, it died again.
Could the cold be draining the juice or is it time for a new battery?
Make sure that all accessories were turned off and the truck was driven long enough — about an hour — to have charged the battery after the jump start.
Also have the battery checked for a dead cell condition. This is a simple test. Sometimes a dead cell can cause the battery to fail even if it is not old.
Batteries can fail suddenly in both warm and cold weather.