Taiji, the monsoon season is a distinct difference between my area and yours. We have officially had a "trace" of July rain. That's it! If there is more than an inch of rain over the next 9 weeks, we will count ourselves lucky. The likelihood is that it will fall 1/10 of an inch at a time. That will not do much more than bring the temperature down.
The early potato harvest is in full swing in my garden. Since I only have earlies, it won't take too long but I'm not willing to carry out many at a time
. Viking Purple, Red La Soda & Yukon Gold
These are from a different garden than in past years. I was truly ready to give up on the Yukon Gold, altho they are DW's favorite. They had miserly production in the other garden where I grew them 3 or 4 times. They did much better out in the heavier gravel of the big veggie garden rather than in more fertile soil and pea gravel in the other garden, I don't know why.
The very productive Viking Purple has performed as usual, altho some have split. I don't know why that happened - a first.
The Red La Soda look fine but are quite small tubers this season. I suppose that I like them a little better than the Red Norland but there hasn't been much difference between them.
Different locations and everything is a little different in the spud patch. There is less than 20 miles between my gardens. Your recent weather changes would probably make for dramatic differences, by comparison.
Make everything as simple as possible but not simpler. ~ Albert Einstein