What does the perch year look like at my latitude?

Same movie, different start times. Across southern Canada and the Great Lakes: last-ice staging bites in March, spawn at ice-out (April–May) in shallow bays at 7–12 °C (45–54 °F), weed flats in 2–6 m (6–20 ft) through early summer, a deep slide to 6–12 m (20–40 ft) in high summer, the post-turnover basin feed in October–November, first ice in December, and steady midday grazing all winter. Slide south (the U.S. Midwest and Northeast) and everything shifts weeks earlier in spring, later in fall, with a shorter or absent ice season; push into northern Canada and the calendar compresses — June spawns, brief summers, seven months of hard water. Anchor on water temperature and ice dates and the map reads itself.

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