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 Lockport: The hottest months are usually July and August, with an average temperature of 20°C, while the coldest months are February and January, with an average of -1°C. The snowiest months in Lockport are January, March, February and December, with each month seeing an average of 43 cm of snowfall.