Weather, Illumination and Control Weather spell

[Shin Okada]

Some of the weathers created via Control Weather spell, such as fog, obscures sight and give some degree of concealment to creatures. But non of the weather conditions listed in DMG or SRD specifically says that it diminishes illumination level to dim or darkness.

Should a creature in, say, foggy area still considered to be "under sunlight" or "under blight light" if that is a day time? For example, should a drow in dense fog be dazzled?

If non of the listed weather conditions protect such creatures from sunlight, do you allow a caster to create some weather, say, cloudiness, for dropping illumination level (to dim lit and such)?

 

[Greenfield]

Sounds like a DM call to me, to be served with a side order of good sense.

In your opinion, is an overcast day "direct sunlight"? Do you think that answer should change if the overcast is magically manipulated, as opposed to natural?

Ask the same question about light fog, heavy fog, thunderstorms, etc. Apply the answers to the game accordingly.

Generally the answers to most of those would be "It depends" for most of those, in my view. I've seen low lying fog so low that you can see the sun, and I've seen overcast skies over head while the sun is at a low angle, cutting in from the side as it were.

More specifically though, if a Vampire is using Control Weather to give themselves some advantage, you could probably presume that they know what they're doing and that it will work.

Your call though, in the end.