Answer:
In the given sentence, there are two noun-count nouns:
rain
murkiness
Step-by-step explanation:
Non-count or uncountable nouns refer to things or qualities that cannot be counted. The simplest way to find them in a sentence is by trying to count them. If it sounds off, then it is probably uncountable.
For instance, no one ever says "two rains" or "three murkinesses". These nouns cannot be counted. "Rain" is always singular, even though it refers to multiples drops of water falling from the sky. "Murkiness" is a quality, referring to something or someone that is not clear, either literally of figuratively.