8a and 8b, the plants will do fine if I plant them now but if I repotted them I could get them looking better and stronger and more durable, but......... if I repotted them how long would they need to spend in the new pots before I ground planted them, how long does it take them to recover and gain something from the repotting?
If it takes too long to make a gain from repotting, or if little is gained, then I may as well put them into the ground right now, my ground temperatures are adequate already.
If this is your normal planting time, then go ahead and put them in the ground.
HOWEVER - I think you’ll have better results and less loss if you follow my lead:
My tomato plants are re-potted from under lights in the house when they have two sets of ADULT leaves (not the little seed leaves) for about 4 weeks before I plant mine at the end of May. They also go into the unheated greenhouse then because it’s plenty warm in there.
Then, I move them outside during the day, and inside at night to ‘harden them off’ which makes the plant stronger. The wind moves them around a bit to toughen up the stems.
I put a 1/2 cup of crushed eggshells and a 1/2 cup of bone meal in the planting holes when I plant them out, then I cage them and fertilize them when I see the first blooms forming. The first items prevent Blossom End Rot. Works like a charm.
If I don’t disturb the roots much, I find very little loss from repotting tomato plants into larger pots, and if the soil / potting soil they get potted in is good, they usually do very well / get a net gain. However, esp. with determinate plants, this year I may just start 2/3 plants in large pots and cull the weaklings or attempt to separate and repot them into a cooler location to (hopefully) fruit later, as the early producers fade.