I have a 2011 Honda Civic, 1.8, auto base model.

Now my problem is that out of the blue one day I got in my car after it had sat in the Sun for about 2 hours, as I started to drive it there was this whining noise coming from the front of the car, when I depress the brakes the noise either quiets down or stops altogether the noise does not happen while I am moving forward. And it doesn't seem to be happening if the car is either not in direct sunlight or not up to operating temperature. I have checked all my fluids and they are good.

Thank you for your help.

 

it could be your brake pad wear indicator or maybe a sticking caliper piston,remove the caliper and lube up the piston.

 

You need new brake pads buddy either that or you have dust, dirt and grime in your break boots or brakes. Try spraying them down with the pressure washer at the car wash and if it persists then get your brake pads changed out with some new ones.