Keelung's winters are mild, with temperatures ranging from 7-27°C in January and 12-28°C in February, gradually warming up. Spring arrives in March, bringing warm days of 11-30°C, but it's April that truly marks the season's beginning, with average highs soaring to 33°C. Summer is hot and humid, with June and July often seeing temperatures above 35°C, while autumn brings a gentle reprieve, with October enjoying slightly cooler days around 19-37°C before winter returns in November and December.