You really do get used to it. I do much better with hot-weather rides in July and August than I do in May. Eventually it's just hot here every day, even in the morning, so it starts feeling pretty much normal. But we had a fairly cool springtime here, so I am not used to rides when it's over the low 80s just yet.
Emily
2011 Jamis Dakar XC "Toto" - Selle Italia Ldy Gel Flow
2007 Trek Pilot 5.0 WSD "Gloria" - Selle Italia Diva Gel Flow
2004 Bike Friday Petite Pocket Crusoe - Selle Italia Diva Gel Flow