A couple of pictures from further back will help.

I don’t see any daylight, I do see white though. which is the weatherstripping and base color of window. The pictures seem to be introverted? It is expected for a quallity installer to clean up imperfections . Ideally you should have brought up concerns

with the installation company first.

The daylight can be seen in as the vertical white lines on the side of the upper sashes in the original pictures I posted.
Below in the 1st image A) is the daylight and b) is the daylight reflecting off of the top of the lower sash and C) is a small buildup of frost/ice caused by the cold air blowing in. In the second image the white that’s circled is frost/ice that was building up on the other side of the same sash (the daylight can’t be seen in this photo).
I’m not sure what you’re saying may be introverted, please clarify. Yes, the installers did a poor job with the little details and a few other things. The question at hand will be addressed with the installing company when they return to replace the damaged frame on the other window. I’ve also called the manufacturer to discuss this with them but haven’t gotten a return call.
Thanks, I appreciate the feedback.

Here are a few more pictures taken this morning. As mentioned originally, now that it is warmer, the weather stripping or window frames have expanded the daylight gaps or voids are no longer present. When the original pictures with the gaps present it was around 8 degrees below zero.
Thanks again.

The ”abcABC” picture looks like white vinyl not daylight to me.

I am not sure what the one circled in yellow is , looks to perhaps be fuzz from the pile weatherstrip.

A is light shining through a gap
B is the light coming through the gap and landing on the top of the lower sash.
C is ice forming
The circled one is ice forming as well.
Below is a shot of the ice melting after being moved out of the area by the gap.

You are going to be a bit hamstrung by that set up. An outside corner with zero protection and likely poor circulation = condensation woes.

Looks like the jamb jacks and maybe some corner weatherstripping would abate the fitment issues.

WOW ltd,
With only happening in the below 0 degree temps we experienced you believe it to be a fitment issue? I would think with the cold temps that the frame would contract. I guess it could be the rough framing contracting but it impacted both windows. Condensation hasn’t been an issue except that one time when the gaps appeared in the below 0 temps and the air was coming in unabated. As for weather stripping, where would you suggest it be added to new windows to rectify the situation? Below is an image of one of the windows from the exterior.
Thanks for you help.

Steve, take a picture of the entire lock ….There is a reason. I may have seen this before.

Also take a picture of the keeper ( thats what the lock engages into.

Here ya go. I see that the felt needs to be removed from the one lock and that there’s a mark where the latch was thrown before it was fully aligned (that was an original issue with these windows, the alignment rails initially didn’t line up and the latch would push the upper sash away when you tried to lock the sashes). They for the most part aligned them but it’s still not great (also part of my wanting to figure out what’s going on so I can speak with them intelligently about what needs to be remedied). Thank you for the help!
Another 4 pics to follow.

The other 4.

Reality is that it is all of the above that you mentioned. Framing in that wall is going to elongate and shrink more than any other wall in the home given it complete thermal bridge to the exterior, but that window needs adjustment as well. They also make corner pads for those areas where the windows meet and you will have some unavoidable air leaks. The windows do have to move so you are bound to have some interface gaps. I would call the installer out and see if they can't get that window more dialed in.

Good info above.

Bottom line: have the installer/service tech out to see what adjustments can be made. Often the jambs at the meeting rail area can be tightened slightly.

While a vinyl window (like any material) will expand and contract, its designed to accommodate that movement with the type and qty of weatherstripping, manufacturing tolerances, etc. The fact is that in temperatures as extreme as mentioned, the window really needs to be dialed in to perfection, and even then, there will not(and cannot) be 100% seal that would prevent condensation(frost).

I'll say this, its not likely that there is unabated airflow there, light can shine through the white weatherstripping (exterior side) more easily. A smoke stick would show how much air is moving there, but I've seen many cases that look similar and had little air infiltration. I still think that this can probably be improved, but its also not likely as bad as it may look.

Thank you all for taking the time to reply. I appreciate your help in figuring this out. ✌️

You don’t need a smoke stick when you got light shining through and ice formations . The reveals look even, the quality control looks off. unfortunate from a company that touts air infiltration as one of its maim selling points. cheater pads are just that

The one picture looks like a bit of the weld squeeze might be pinching the weatherstripping as well. Might be time for a sharpen chisel and a bit of detailing work.

Again...that corner is going to be a SOB because you are lacking any real coverage and completely bridged.