[Capt. Lou]

If uve ever monitored temps eay season fresh or salt , u know the main ingeredient is the sun , lotsa sun temps pop . Clouds prevail & heavy rains could remain cooler longer.
Tides , wind all play apart in changing temps surface wise , while currents runoff mY affect deep temps.
Salt freezes @ lower temps than fresh but tides can dissolve ice faster .
There in my records never been more than a few weeks different in spring temps even in severe winters .
This late frigid weather will definitely keep temps down but if it warms fast then balances out quickly .
Best to monitor with temp gauge warmer water this time of year always deep , hence why surface freezes ! Take bottom temp as well in fresh usually hangs @ around 40 / 42 now , much warmer than topside.
No rule of thumb but sun will play big factor !