Rivne's winters are cold and variable, with temperatures often dropping below -20°C in January and February, but occasionally rising to around 10°C. As spring arrives in March, temperatures gradually warm up, reaching averages of 2-6°C by April and May. Summer months bring mild warmth, with June and July averaging around 20-23°C, while August is slightly cooler at 18°C. Autumn brings a return to chillier temperatures, with September and October averaging around 12-8°C, before winter's cold returns in November and December.