Likewise solar. Solar contains a predictable component with a stochastic component (clouds) overlaid.

Solar thermal can mostly solve the problem.

Wind is usually stronger during daylight.

I expect that to be dependent on location. Near coasts, for example, the physics driving sea and land breezes (https://en.wikipedia.org/wiki/Wind#Sea_and_land_breezes) will either increase or decrease wind speed depending on local prevailing winds.

It also can depend a lot on height (very important for wind turbines)