Bringing discrete .csv weather data in Simulink model as continuous signal

I have a .csv of weather data formatted as such:

Date              Value1 Value2 Value3
1/1/2014 1:00AM   67     23     36
1/1/2014 2:00AM   68     21     36.5

I want to bring this into the Simulink space as a continuous signal that interpolates the values between each timestamp. I'm going to be designing some PID loops that respond to these values so I think this is what I'll need to do. Where would I begin doing this?