Guernica's climate is characterized by mild winters and warm summers. The summer months, December to February, bring hot temperatures often reaching above 35°C, while spring (September to November) sees a gradual warming trend with temperatures rising steadily throughout the season. Autumn is cooler, with temperatures ranging from around 0°C in May to 25°C in September, but still relatively mild overall. Winters are the coolest period, with temperatures occasionally dropping below freezing in June and July, averaging around 10-11°C during these months. The temperature fluctuations between seasons are quite marked, with summer highs often more than twice as warm as winter lows.