Car does not like the heat?

I have a 92 Integra and lately it has been super hot like 89+ and I come out of work and try and start my car and it does not want to turn over, I checked the battery and it's like new, I don't think it's the starter. I try it a few times and let it sit and then it starts.

I come out first thing in the morning and it works just fine, same with on "cool days" no problems.

Ideas? :icon16:

Main relay. I'm assuming DA's have "Main Relays" like EFs. It's the fuel pump relay located up behind the driver side kick panel. Remove the change tray (if there is one there on the dash) and reach back to it. If it gets really hot they don't like to kick the fuel pump on. It's a common issue. I used to just let my car air out for a few and keep at it. If it was a bitch I'd kick the kick panel or reach up and wiggle the wires. Many people just replace the main relay if it stops working all together. The problem is really the soldering of the wires within it. Extreme heat seems to break the connection.