Last year our panels produced more than this year or 2020 in March, April, and May. February this year was better than last year (think last year we had some snow in February, which can really tamp down production if it sits for days, as January this year showed). June 2021 better than 2022, but 2019 and 2020 were better for June production here. I think it’s sort of random — how much sun, when, etc. — but the pattern at my house seems similar enough to yours that I wouldn’t worry too much about it.