If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in New Glasgow: 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 New Glasgow are February, January, March and April, with each month seeing an average of 65 cm of snowfall.