How many diapers you are using per day ? Is he feeding normally? Is he on formula milk or breast milk?

What’s Normal vs. Concerning At 2 months of age, 6–8+ wet diapers per day with pale/clear yellow urine is the expected norm. The changes you’re describing as darker yellow urine and reduced quantity — are classic early signs of dehydration, regardless of the season. Summer heat can increase insensible fluid loss (through sweat and breathing), that contribute to mild dehydration — but at this age, the baby’s only fluid source should be breast milk or formula, and that intake needs to increase to compensate for his total body water loss.

You need to consult with pediatrician

Yes it is due to dehydration in summer Try to give more feeding compared to what you were giving regularly

Visit physically to nearby pediatrician

Summer has started so hydrate him well and give ors if you feel, he is dehydrated. If he persists to have reduced urine output. Visit a paediatrican

Nothing to worry