Winters in Southall are chilly, with temperatures averaging around 4-6°C, occasionally dropping below 0°C. As the season transitions into spring, temperatures gradually rise, reaching an average of 7-11°C by May. Summers are warm and pleasant, with July typically being the warmest month, averaging around 18°C. Autumn sees a slight cooling trend, with October experiencing average highs around 13°C before dropping to around 8°C in November and December. Mild temperatures persist throughout these months, rarely dipping below freezing point.