East Java, Indonesia · population 2,374,658 · 32 weather stations within 200 km · records 1841 to 2025
Surabaya has an average annual daytime high of 31.3°C, based on the 1951 to 1980 baseline. Its warmest month is October, when highs typically reach 32.4°C, and its coldest is July, with overnight lows near 22.7°C.
These figures reflect annual averages, not single-day records. Daily observations are outside this dataset's precision.
Since 1900, Surabaya's average temperature has risen by 0.0°C. Compared to the earliest station records that begin in 1841, warming totals +1.6°C.
20-year smoothed annual temperature reconstructed from station anomalies. Dashed line: 1951–1980 baseline.
Daytime highs sit within a comfortable 15°C to 26°C range.
Surabaya's average annual daytime high is 31.3°C, based on the 1951 to 1980 baseline period. The warmest month is October, with highs averaging 32.4°C, and the coldest is July, with lows averaging 22.7°C.
October is the warmest month in Surabaya, with typical daytime highs of 32.4°C.
2023 is the hottest year on record for Surabaya, running +1.6°C above the 1951 to 1980 baseline.
Yes. Since 1900, Surabaya has warmed by roughly 0.0°C.
any time of year typically offers the most comfortable daytime highs, in the 15°C to 26°C range.
Baseline period 1951 to 1980. Monthly averages are the mean of station observations weighted by proximity. Warming trend is the 20-year smoothed anomaly against that baseline.