What would be the temperature of SOLID hydrogen?

dutch wikipedia says hydrogen melts at 14.01 Kelvin

There's no such thing as "degrees Kelvin"

As others have stated, it has to be *really cold* for that to happen; -434.5°F
or
-259.2°C.  
Here's an article on how solid hydrogen *behaves* when it's subjected to pressure while being so cold... kinda cool: https://www.newscientist.com/article/2119442-metallic-hydrogen-finally-made-in-lab-at-mind-boggling-pressure/#:~:text=At%20relatively%20low%20pressures%2C%20the,it%20was%20solid%20or%20liquid).

why did you not look it up instead of speculating?

wikipedia:
Melting point (H2) is 13.99 K ​(−259.16 °C, ​−434.49 °F)

so anything below that point would be solid. 

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Any temperature you want if the pressure is high enough.

well it would have the temperature of 4 kelvin or you could increase the pressure until it reached a solid state which would also be called solid hydrogen but this would be hard to achieve 

14kelvin - (or 14degrees above absolute zero or -259degrees C)

Really hot considering the core of Jupiter.

Hydrogen melts at about 20 K.

Hydrogen goes solid at 4 degrees Kelvin, just 4 above absolute zero