Overview: SurabayaSurabaya (Indonesia) in general has a tropical climate. Temperatures during the day are in the range from 31 °C (88 °F) in January to 34 °C (92 °F) in October. The driest month is August with just 1 day of rain, on the contrary, the month when it rains the most is February with 22 days of rain. Temperatures during the night go from 23 °C (74 °F) in July to 25 °C (77 °F) in October.