A bit far away in time
Hi Larry
The Sun isn't due to leave the Main Sequence for about 6.4 gigayears and even then for about 0.7 gigayear it'll be just doing a redwards excursion, not going Red-Giant. Mars will be about the right temperature by then.
If humans are still around they might decide to re-engineer the Sun and keep it on the MS for another 100 gigayears.
Adam