Look for adjectives or adverbs near 'variability' to understand what type it refers to. The seasonal variability here, especially the sudden storms, is striking.
Pro Tip 2/3
Expect Changes
'Variability' implies that changes are normal within the context mentioned. Due to the variability of our climate, we must plan accordingly.
Pro Tip 3/3
Not Always Welcome
Variability can suggest unpredictability, which isn't always desired or positive. The variability of his moods makes him difficult to work with.