Nexus 6 battery temperature topic

Hey guys I have the nexus 6 for almost a week now and recently i noticed that the battery temperature is between 35 on idle to 42 on simple task such as surfing chrome ... Is that normal ? providing I live in a hot country but right this moment at night the temp is 24C .. So anybody facing this problem .. the back of the phone gets really warm It's like when you gaming for example except it's just surfing the internet nothing else