In Magadan such frosts usually do not begin earlier than the third week of August.
The first frosts are expected in the Magadan Region-Meteonovosti-RU.
“In the central regions of the Magadan region, such early frosts are rare.”
Expected to freeze to -3°C
In the central areas on July 31 … In the daytime the temperature will rise to 14..19°C, at night +2 .. + 7, with a clearing expected to freeze to -3°C (26.6°F).
In the central regions of the Magadan region, such early frosts are rare. And in Magadan itself, the frosts begin not earlier than the third decade of August. (I assume this means the third week.)
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Thanks to Martin Siebert for this link