What kind of output are you getting in Seattle/Northwest?

[oregon_phil]

June also has cooler nights. Panel temperature derating effects can often been seen in the hot days of July and August. Storm systems have a big effects on monthly output no matter what month.

[bcroe]

I see roughly 3 times as many KWH harvested in any best month,
as in worst like Dec. Bruce Roe

[Mike90250]

.....
2) Why is June your best month and not July or August?

June may be cooler than July or Aug. Cooler panels produce slightly more power

[oregon_phil]

I know each day has many variables. That being said, I have attached data from last heat dome which was on 6/28/21.

[oregon_phil]

June 2022 is almost the opposite of last year's heat dome. Exceptional June rain soaks Pacific Northwest due to atmospheric river

It has been raining off and on for months.