Cold enough to crave heat or hot enough to crave cold
Happiest days for me are sitting in warm sun by the water to the point of needing to cool off with a plunge, only to be shaking and needing to heat up all over again in the sun on the sand... rinse, repeat.
As far as an average day in the yard or on a patio or going for a walk, older I’ve gotten the more wind becomes as big a part of this conversation as anything. Low 20s and sunny with no wind or a light breeze can be just about as perfect of a day as 30 with a stronger breeze or some cloud cover. Prob most often though I’d say days in low 20s and sunny hit that mark of being able to enjoy outdoors without having to work too hard to manage the heat.
TL/DR: it's complicated, but can't control it so gotta go with it :)