Hawaii, United States of America · population 371,657 · 168 weather stations within 200 km · records 1821 to 2025
Honolulu has an average annual daytime high of 26.8°C, based on the 1951 to 1980 baseline. Its warmest month is September, when highs typically reach 29.1°C, and its coldest is February, with overnight lows near 17.1°C.
These figures reflect annual averages, not single-day records. Daily observations are outside this dataset's precision.
Since 1900, Honolulu's average temperature has risen by +1.6°C. Compared to the earliest station records that begin in 1821, warming totals +1.7°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.
Honolulu's average annual daytime high is 26.8°C, based on the 1951 to 1980 baseline period. The warmest month is September, with highs averaging 29.1°C, and the coldest is February, with lows averaging 17.1°C.
September is the warmest month in Honolulu, with typical daytime highs of 29.1°C.
2019 is the hottest year on record for Honolulu, running +1.6°C above the 1951 to 1980 baseline.
Yes. Since 1900, Honolulu has warmed by roughly +1.6°C.
January to December 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.