If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Sable River: The hottest months are usually August and July, with an average temperature of 16°C, while the coldest months are February and January, with an average of 1°C. The snowiest months in Sable River are February, January, December and March, with each month seeing an average of 32 cm of snowfall.