It's probably a flaky humidity sensor.
![Big Grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
(just kidding)
I'd start with checking for any engine codes first. You never know, the temp sensor could be on the edge. Ideally, if you had a scan too like THIS, you could observe readings when it was stumbling. It could well be cracked ignition coils, or something like that which spark errantly when humid.
But first, I would push down all the fuses and wiggle the relay, cause it costs nothing and takes a minute. Sometimes they work themselves up. Then I'd wiggle the bundle of wires beneath the fusebox. Just wiggle them gently...in case there IS a weak connection.
Then, I'd make sure the battery cable connections, and grounds are good. Esp the grounds...at the body/frame/engine. Grounds are a common source of issues.
Now we're getting to the real stuff (but don't overllook the common small things).
1) Remove the air intake snorkle tube, open the throttle body butterfly valve and inspect for any carbon/fuel deposits. If there are ANY....clean with some throttle body cleaner and a solvent-safe angle brush (like a big tooth brush) that you can get at the auto part's store for like a buck. Never use anything abrasive. A little deposits around the bore or on/behind the throttle body blade can cause stumbling. Be sure when you put the snorkel tube back on it's on 100% proper....not folded under (by mistake) back by the clamp.
2) While the snorkel is off, look over for any cracked hoses, or hoses which may have fallen off. Be REAL thorough in your looking. totally conceivable on a '13 a hose could be cracked and sucking air when it shouldn't.
3) If you don't have a scanner (and even if you do), remove the igition coil connectors and ohm them out. See if any are quite a ways off from the others. Ideally you would remove each coil and inspect it's end for micro-cracks and gray electrical traces of sparking ...to the head. Thats pretty common and it only takes one. Watch some videos on coils what to look for. When it's real humid it's easier for arcs to jump...