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Peak production, summer vs fall. August vs September vs October

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Seem a lot of questions about lower (peak) production lately. Just posting my examples for reference.

Mid August to today (mid October). Perfect sunny days in metro Chicago

15.64kw east (16x340) west (30x340) split with 7.6(22w/8e)+3.8(8w/8e) inverters. Installed early August.

The little hump around 10am is when the sun is finally high enough to hit the west panels and the production start shooting up

Between the shorter days and lower off the sun it went from 91+ kwh to 56 kwh

I expect June/July to have higher number.... Maybe breaking 100kwh would be nice

Also a PVwatts estimate for my location. So far August and September have been pretty close. October had a rainy start so it's a little behind
 

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