Might be a bad wire connection problem. As stated before it could be a bad ground or other bad connections. If I remember correctly, electricity flows better in the cold than hot. Possibly on your bike, when it's cold, there is enough electricity flowing through, but when its hot, then there is more resistance and there is not enough to start the bike. Obviously this difference is not big enough that you will encounter it on a regular basis, but maybe, just maybe, if there was a bad connection, like a corroded wire connection, then that along with the hot temp prevents enough electricity to start the bike.
Even if this is not the reason for your troubles, its still a good idea to clean your connections. Since the bike just came out of hibernation, it is very possible that some connections have rust on them or corrosion.
Don't take my word for it. I'm just a foolish newbie.
When in doubt, just know that I am only joking around.
Top speed is 112 mph at ~7900 rpm
Blacked out engine
Dry rusty splines finally lubed for the first time
R/R relocated to the side of fuse box
Rust removed from tank
In line fuel filter, 23-28 micron rating
LED turn signals & brake light
16 color LED engine light up & underglow