That sucks. We do three walks a day no matter what, although I do make adjustments for conditions.
Today it was around 70, but seemed warmer because the conditions changed so quickly. Opal, who is nearly 14, didn't want to join the others at lunchtime. I took her out separately. She turned back as soon as she was empty. Then she wandered around the edges of the yard for quite a while eating tasty spring grass. The leaves are coming out so she had a fair bit of shade during her wander.