Winters in Livermore are cool, with temperatures ranging from near-freezing to mild highs, averaging around 10-12°C. Spring brings moderate temperatures, slowly warming up to average highs of 14-18°C by May. Summers are warm to hot, with July and August being the hottest months, averaging highs of 22-23°C. Autumn is characterized by a gradual cooling down, with temperatures returning to cooler averages by October, ranging from near-freezing to mild highs.