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.