Green sky

[awakemon]

On some days in Morrowind the complete sky turns green; the light from the sun is also displayed green.
If I disable the skybox there's still a green shine.
Disabling clouds, mist etc. doesn't change anything.

Here's a picture with the skybox enabled:

And here one without the skybox:

This just happens on certain days. Disabling the script removes it.
If I am mistaken and it is supposed to be like this I apologize, but the completely green sky kind of threw me off.

I'm running the current Dev Build 340a2aa826