Hilo Intl climate by month
Averages and records for each calendar month at Hilo Intl, United States, from 1949 to 2026. The warmest month is September, averaging 28.9°C; the coolest is February at 26.3°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 26.5°C | 17.6°C | 33.3°C28 January 1997 | 12.2°C23 January 1969 | 77 / 77 |
| February | 26.3°C | 17.6°C | 33.3°C20 February 1968 | 11.7°C21 February 1962 | 77 / 77 |
| March | 26.3°C | 18.1°C | 33.9°C23 March 1972 | 12.2°C18 March 1971 | 77 / 77 |
| April | 26.6°C | 18.7°C | 31.7°C2 April 1963 | 14.4°C5 April 2008 | 76 / 77 |
| May | 27.4°C | 19.3°C | 34.4°C20 May 1966 | 14.4°C23 May 2024 | 77 / 77 |
| June | 28.1°C | 19.9°C | 32.2°C24 June 1969 | 16.1°C26 June 1956 | 77 / 77 |
| July | 28.5°C | 20.6°C | 33.9°C26 July 2020 | 16.7°C11 July 1970 | 77 / 77 |
| August | 28.7°C | 20.8°C | 33.9°C15 August 1950 | 17.2°C1 August 1950 | 77 / 77 |
| September | 28.9°C | 20.5°C | 33.9°C26 September 2014 | 16.1°C30 September 1970 | 76 / 77 |
| October | 28.5°C | 20.1°C | 32.8°C19 October 1961 | 16.7°C26 October 1949 | 77 / 77 |
| November | 27.3°C | 19.4°C | 34.4°C28 November 2013 | 14.4°C15 November 1949 | 77 / 77 |
| December | 26.5°C | 18.3°C | 33.9°C14 December 1980 | 12.8°C23 December 1977 | 77 / 77 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 76 to 77 years each.
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Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.