When you're dreaming of a stay in Pervomaisk, make sure that you take the year-round temperatures into account. The hottest months are usually August and July, with an average temperature of 21°C, while the coldest months are January and February, with an average of 0°C. The snowiest months in Pervomaisk are January, December, March and November, with each month seeing an average of 15 cm of snowfall.