No no no, it doesn't need to be warm and sunny but it needs to not be cold and stormy. 50's and 60's and mostly cloudy are fine, 40's and wet is terrible. It was a rotten winter for doing outdoor things (off the pavement) even though it was "warm and dry" because things never dried out from the wet two years previous. It's time for a nice(ish) stretch so we can get back outside.