Peppers are different from nearly all the other garden vegetables.
Importantly, they are perennials. The peppers that I have each year have amazing root structure. They are preparing for a long life and using their light, water, air, and plant nutrient resources for root building. I really should move all to larger pots out of my commonly used 4-packs.
Not this year's peppers, however. The plants are just not growing with the lack of sunlight. Your clouds are over here day-after-day, AMK'. Come get them!
Now, anything that I say about peppers must be taken with a sprinkle of salt. Since nearly all my growing experience is here in this pepper-deprived area, I seldom have much of a crop. The best pepper plants I have had were those set in a bed in the greenhouse to grow thru the Summer. If watering them wasn't such a bother in there, that's where they should be every year! Let's see, how about if we both move to the highlands of central Mexico???
Steve