I have been working on a Temperature system for a frozen western campaign ill GMing but I am not sure how I should do this with out just using the toughness score and taking points away from there health.
I came up with two scores one for cold and one heat!
My cold score works like this, similar to other stats like it all players start with ten. We then add your will power and fortitude to this plus armor bonus. You can increase you temperature by siting next to a fire or seeking shelter. You temperature decrease over time from being out side in the cold and depending on the season the decrease in temperature can be greater. A roll of a dice dependent on the season decides the decrease in temperature, your temperature can also decrease from things like swimming in cold water. The temperature stat starts at full and decreases over the events of the campaign once you drop bellow a 10 in the stat cold you begin to suffer frostbite, when you drop bellow 5 you begin suffering hypothermia, once you hit 0 zero you die almost immediately from the cold.
The Heat Mechanic would work in reverse meaning you want your score to be lower so the stats you have would decrease the heat score not increase it, also you would be penalized for wearing cloths. If anyone has advice for how to do the heat stat let me know.
This is a hardcore campaign and the players have accepted that but I would like assistance creating this system of temperature!