chek if it is possible to upadate the temperature

src/main/java/environment/Basin.java

@@ -167,10 +167,14 @@ public class Basin implements Position, Comparable<Basin> {
 
 
 	public void updateSeasonalTemperatures(Long year) {
-		winterTemperature = seasonalTemperaturesSeries.get(year)[0];
-		springTemperature = seasonalTemperaturesSeries.get(year)[1];
-		summerTemperature = seasonalTemperaturesSeries.get(year)[2];
-		fallTemperature = seasonalTemperaturesSeries.get(year)[3];
+		if (seasonalTemperaturesSeries.containsKey(year)) {
+			winterTemperature = seasonalTemperaturesSeries.get(year)[0];
+			springTemperature = seasonalTemperaturesSeries.get(year)[1];
+			summerTemperature = seasonalTemperaturesSeries.get(year)[2];
+			fallTemperature = seasonalTemperaturesSeries.get(year)[3];
+		} else {
+			System.out.println("no temperatures for " + this.name + " (" + getClass().getSimpleName() + ") in " + year);
+		}
 	}