One factor to consider is humidity. The air can only cool to the dew point and at that point there is an equilibrium. Instead of getting colder, things just get wet. Humid air has a higher specific heat capacity than dry air, so the same amount of solar energy will heat an equivalent volume of air to different temperatures.

I lived in Bermuda where the humidity is always high, but the diurnal range is greater in winter when the humidity is lower.

Here is light reading and formulas: https://www.engineeringtoolbox.com/amp/enthalpy-moist-air-d_683.html