Weather can make or break a road trip, so we've gathered some data about year-round temperatures in Ostroh to help you plan yours. The hottest months are usually August and July, with an average temperature of 18°C, while the coldest months are January and February, with an average of -1°C. The snowiest months in Ostroh are January, December, November and February, with each month seeing an average of 23 cm of snowfall.