Cathedral Weathers Unofficial Update, formally known as the God Ray add-on applies some fixes and personal tweaks. Originally this was intended to be more compatible for ENB but it can be used on it's own without an ENB.
A few changes from Cathedral Weathers and Seasons
-Overhauled most god rays / volumetric lighting across most weathers. VL will be more suitable to the weather and god rays will be more aligned with the color of the sun.
-The sun and moon will now be visible under more overcast, foggy, storm and ash weather conditions... often obscured behind the clouds.
-Adjustments to cloud layers; the fantasy sunsets/sunrises for clear weathers will appear more frequently.
-Minor adjustments to image spaces
-Light rain and light snow has been added to a couple cloudy weathers.
-Fixes interior rain sounds
-Night vision improvements for ENB
-Adjusted snow effects
ENB Recommendation
Personal plug but if you're looking for an ENB, try mine. I built Soul Spectrum ENB in conjunction with this mod, so the two go hand and hand. Otherwise any ENB for Cathedral Weathers will work just fine.