Why are my cucumbers turning yellow?

This will answer your question. This has been a strange year for plants of all kinds. Some areas are getting too much rain and some are getting none. https://www.youtube.com/watch?v=aoPAW7Yr0CU

Again,

A. plants of All kinds do not merit receiving Chinese Water Tortures adapted for Plants.

B. Water is by no means a Substitute for Minerals and Food.

They need Manures and what I call a Diarrhea Daiquiri treatment:

32 oz Water

8 oz Manure

1 Spritz of a Lemon

If these poor cucumbers had mouths these would all be screaming:

Help! HELLLP! Somebody! Somebody Please rescue me! Steal me away from this Cruel Owner and this Water Diet Torture! I need Food! Help!

So, you gotta feed them.

Did you miss picking them? In my experience, they have over-ripened when they yellow and you can't eat them.

Hello. A cucumber can become over rip and turn yellow. The chlorophyll begins to fade causing them to yellow. It also can be from a virus or over watering.

My experience has been that if left on the vine and picking young and green. They are not inedible however.You can make relishes- I just made dill relish. There is an old time recipe that called for only yellow cucumbers called slap jack pickles.Good and sweet.My first in- laws gave me the recipe but it is time consuming with salt soaking overnight, cooking till translucent- looked like pears.It is simply they have been on the vine too long. They can be used as I said for relishes as well.

I meant to say you did not take them young and green