#include <Wire.h>
#include <LiquidCrystal_SR.h>
float tempC = 0;
float tempf = 0;
int tempPin = 0;
float samples[8]; 
float maxi = 0,mini = 100; 
int i;
// Arduino Pins
LiquidCrystal_SR lcd(2,3,4);
//                   | | Latch
//                   | Clock
//                   Data
void setup()   {
   Serial.begin(9600);
   lcd.begin(16, 2);
   lcd.setCursor(2, 0);
   lcd.print("LM335Z");
   lcd.setCursor(3, 1);
   lcd.print("Thermometer");
   delay(5000);
   lcd.clear();
   lcd.setCursor(2, 0);
   lcd.print("reading ...");
   lcd.setCursor(1, 1);
   lcd.print("...done!");   
delay(5000);
lcd.clear();
}

void loop() {
 Serial.println("");
 Serial.print("LM335Z Raw data: ");
 Serial.println(analogRead(tempPin));
  for(i = 0;i<=7;i++) {
   samples[i] = (( 5.0 * analogRead(tempPin) * 100.0) / 1024.0) - 273.15;
Serial.println(samples[i]);
  lcd.setCursor(0, 0);                                          
  lcd.print("Current temp is: ");                             
  lcd.setCursor(1, 1);                                         
  lcd.print("  Celsius   ");                                 
  lcd.setCursor(12, 1);                                      
  lcd.print(samples[i]);                                     
  tempC = tempC + samples[i];
  delay(800);
  }
 Serial.println("");  
 Serial.println("");
 tempC = tempC/8.0;  
 tempf = (tempC * 9)/ 5 + 32;
 if(tempC > maxi) {
     maxi = tempC; }
 if(tempC < mini) {
    mini = tempC; }
 Serial.println("New measurement:");
 Serial.print(" Average Temperature in Celsius is " );
 Serial.println(tempC);
 Serial.print(" Average Temperature in Fahrenheit is " );
 Serial.println(tempf);
 Serial.print(" MAX Temperature in Celsius is " );
 Serial.println(maxi);
 Serial.print(" MIN Temperature in Celsius is " );
 Serial.println(mini);
 lcd.setCursor(0, 1);
 lcd.print(" Fahrenheit ");
 lcd.setCursor(12, 1);
 lcd.print(tempf);
 delay(5000);
tempC = 0;
}

Since the number of required pins is reduced to three, it even allows to make the project permanent by replacing the Arduino UNO with the ATtiny45 or ATtiny85. To provide such a standalone project with the proper voltage, when connected to an external power supply, you should add a fixed voltage regulator such as a TS7805CZ or LP2950CZ5.