Is the way I have tied up and hung my yellow onions in the sun okay for curing them? I have read about a bunch of different ways and want to make sure this will work for long-term storage. Thanks.

I would move them out of the sun. If you are curing outside, arrange the leaves so they cover the bulbs or risk sunburn.

I dry mine on the picnic table under the oaks - never in the sun. I also try to keep the onions from touching one another. Once the onions dry, the stems will fall off and your bunches will fall apart.

I agree - you don't want them in the sun. I dry mine on racks made of wooden frames and hardware cloth, in the garage.

Sandy is high tech! I put mine on newspaper on the patio (in the shade). I moved them into my craft room last week when it started to rain. Not quite dry yet but coming along.

I agree with Lucy68 and Weedwacker-
I don't dry them in the sun to avoid sunscald. If you have rows and rows of onions, like a farmer, drying them where they grew in the field is about your only option. That's when you dig, then arrange them in rows to use the leaves of adjacent dug onions to shade the bulbs. I've done this in the past, but can't do it for the two weeks it usually takes to cure them as when I'm watering adjacent veggies (that are still growing,) I end up watering my 'drying' onions!

I grow maybe half a bushel, and dig, gently wash, then move to a covered patio where they cure, in single layers on cardboard. I'm sure a rack with airflow would be better.

This may help- from an onion farm supplier:
https://dixondalefarms.com/oni...

I experimented with yellow onions last year and planted about 50 sets. Maybe I harvested too soon, but I only got about half of them to cure. I harvested when the tops were almost completely dry, but they seemed to rot easily. I spread them out on racks, not touching, and put the racks on top of my little Radio Flyer wagon. They stayed under a tree, but if there was a chance of rain, I took them in the garage. Checked them every day, but had to throw out a lot of them. Sure was nice to have onions handy when needed.

Lucy, high tech would be if I also put a fan on my onions!

Where you live is also a consideration for how you cure the onions - our fall is often quite wet so I need to give them as much help with drying as possible.

I tied the white ones in a bunch and hung it in the shed (80 plus degrees every day.)

Other wise, I wash them well, trim the stalk off, peel most of the loosy goosy stuff then put them in old potato/onion bags and hang them in the basement where a fan runs 24/7.