How does the relative humidity change in a closed system with a change in temperature?

I am trying to determine the change in relative humidity in a closed system (constant volume-jar) with a change in temperature. I know the relative humidity at the initial temperature (RH-40% Temp=35oC) and need to determine the RH at the final temperature of 10oC. The pressure in the jar at the beginning of the test is umed to be at atmospheric conditions 101.325kPa.