I'm not sure whether it can be identified unequivocally as Summer Nights. That is the rose on their website that resembles your rose most closely, but I get the impression, from the HMF description and photos, that the rose starts out yellow, with just the slightest pink edge, and then becomes more and more pink gradually. Yours is barely yellow at all.
http://www.helpmefind.com/gard...
If I weren't limited to the roses currently offered by J&P, I'd guess it's Flaming Peace or some other similar rose.
Rose (Rosa 'Flaming Peace')