Suppose your average comes in at 386. Then:
if ((average > 316 && (average < 386))) // False, won't go here
{ Serial.println ("1 pm");
}
if ((average > 387 && (average < 488))) // False, won't go here either
{
Serial.println("2pm");
}
if ((average > 330 && (average < 375))) // False, won't go here either
{
Serial.println("1.30 PM");
}
// THerefore, it can never be 386