If your lawn is burnt like mine is, late summer or early fall is the best time to repair it.  MARK CULLEN, a Canadian garden expert, has the following advice on the best way to make those repairs:

• Spread Mark’s Choice Lawn Soil (found at Home Hardware stores) over the area you wish to re-seed, 2 cm. thick
• Rake smooth
• Broadcast Golfgreen lawn seed [Canadian for our lawns: 0% weed seeds] by hand
• Rake smooth to incorporate into the soil.
• Step on it or roll it with a roller 1/3 full of water. 
• Water it every day that you do not receive any rain until established.
•  Do NOT let the seedlings dry out!
•  It is best to water first thing in the morning or in the evening.

I am willing to give his advice a try since my lawn looks terrible in its burnt condition.  I have tried overseeding (adding soil and seed to an existing lawn) before, but always end up with more weeds (left picture) than grass (right picture).

 I am not sure whether the weed seeds are in the soil or grass seed I choose, but I know they are in the MULCH  I have used recently.  Hopefully, I will be more impressed with Mark’s choice of products.