If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Twin Bridges: The hottest months are usually July and August, with an average temperature of 17°C, while the coldest months are December and January, with an average of -6°C. The snowiest months in Twin Bridges are February, April, October and March, with each month seeing an average of 19 cm of snowfall.