Generally, summers last about eight months, beginning in April with average temperatures of 21–23 °C (70–73 °F) during the day and 11–13 °C (52–55 °F) at night, and ending in November with average temperatures of 22–23 °C (72–73 °F) during the day and 12–14 °C (54–57 °F) at night, although in the remaining four months temperatures sometimes exceed 20 °C (68 °F)