If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Rustico: The hottest months are usually August and July, with an average temperature of 17°C, while the coldest months are February and January, with an average of -3°C. The snowiest months in Rustico are February, January, March and December, with each month seeing an average of 137 cm of snowfall.