Monthly mean temperatures range from −11.2 °C (11.8 °F) in January to 24.6 °C (76.3 °F) in July, for an annual average of 8.53 °C (47.4 °F). The frost-free period is 183 days, which is long considering the severity of the winters.[62] The city receives 2,468 hours of bright sunshine annually; monthly percent of possible ranges from 45 percent in July to 62 percent in October. Extreme temperatures range from −33.1 °C (−28 °F) to 39.3 °C (103 °F).[63]