When the Gypsies enter the courthouse after the rainstorm, the girl is initially wearing a multicolored shawl. Less than a minute later, she is wearing a raincoat.
The fact that the gypsies have a shortwave radio, which the citizens of Mayberry don't, does not preclude the weather stations, TV stations, and radio stations in North Carolina from having them either. Mayberry would have been just as well informed about weather patterns as was possible.
The "magic" of the gypsies apparently applies to their large shortwave radio featured in this installment. Both in their gypsy wagon and later on when Goober turns it on in the courthouse, it appears to operate without any visible power source, yet, during the day, it picks up weather broadcasts all the way from Greenland! Portable battery powered shortwave radios were available in 1966 (when this show aired), but the large console unit the gypsies have appears to be a AC powered plug-in unit (so how does it operate in their wagon with no electricity?). Furthermore, it appears to be a unit of a make & model that contained vacuum tubes (as most large radios were in the mid- 1960's). When Goober turns the radio on in the courthouse, it unrealistically comes on immediately- as modern radios do- but a vintage radio of that era would take a few minutes for the tubes to "warm up" first before coming on (not to mention that Goober hasn't even plugged it in!).
The character played by Jamie Farr is listed in the closing credits as "Grecos," but in the dialog both Murrillos and Andy refer to him by the name "Silvio."