Looks like your milk supply has decreased, kindly check weight of your child, if weight gain is not adequate then probably you need to start supplement.

Thats ok as long as you are feeding at every 2 to 3 hourly gap and baby is active, sleeps well.

It is absolutely normal for infants to have slightly decreased urine output in summers due to added sweating. But, still it's very important to monitor weight. However, just make sure that you are measuring urine output for 24 hrs complete (i.e., day and night). If at any point urine decreases further and/or significant weight loss becomes evident(>10%) then we might need to investigate and intervene appropriately. But as of now, continue with frequent feeding atleast 2-3 hrly and look out for warning signs.

Check baby's weight, if it is increasing and baby is active and playful then there is nothing to worry about, give frequent breastfeeding.

Please give Breast feeding adequately as this is summer