Redwood City experiences mild temperatures throughout the year, with no extreme cold or heat. Winters are cool and wet, with average highs around 10-11°C in January and December, but occasional warmer days can reach up to 24°C. Spring is a gradual warming period, with March and April temperatures rising steadily to an average high of 28°C by April. Summer is warm and dry, with July being the hottest month, averaging 22°C, while September still retains summer-like warmth before cooling down in autumn. Autumn brings a return to mild temperatures, with October averaging around 16°C.