Nah. Those are just little hiccups.
Here are the dates for worldwide affecting events as recorded by tree rings: 3195BC, 2354BC, 1628BC, 1159BC, 540AD and two smaller events at 207BC and 44BC.
Check your history books and see what was happening in the world at those times.
Lowered temperatures made Roman Senators stab Caesar in the forum (and duodenum)?