If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Arc-1950: The hottest months are usually July and August, with an average temperature of 13°C, while the coldest months are January and February, with an average of -4°C. The rainiest months in Arc-1950 are May, December, November and January, with each month seeing an average of 189 mm of rainfall.