Grand Cayman/Roberts Intl climate by month
Averages and records for each calendar month at Grand Cayman/Roberts Intl, Cayman Islands, from 1966 to 2026. The warmest month is July, averaging 32.2°C; the coolest is February at 28.3°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 28.4°C | 21.8°C | 32.2°C3 January 1977 | 12.2°C19 January 1971 | 35 / 54 |
| February | 28.3°C | 21.1°C | 31.5°C23 February 2010 | 11.1°C11 February 1968 | 28 / 54 |
| March | 29.2°C | 22.0°C | 32.1°C14 March 2024 | 12.8°C3 March 1968 | 37 / 54 |
| April | 30.2°C | 23.0°C | 32.6°C29 April 2016 | 12.2°C19 April 1983 | 40 / 54 |
| May | 31.1°C | 24.0°C | 34.4°C31 May 2024 | 16.7°C2 May 1968 | 40 / 55 |
| June | 31.6°C | 25.0°C | 34.5°C10 June 1998 | 20.0°C2 June 1967 | 34 / 54 |
| July | 32.2°C | 25.0°C | 35.3°C22 July 2023 | 19.4°C7 July 1975 | 38 / 55 |
| August | 32.2°C | 24.9°C | 35.0°C15 August 2026 | 19.4°C12 August 1971 | 39 / 55 |
| September | 31.9°C | 24.5°C | 36.1°C4 September 1966 | 20.0°C1 September 1969 | 33 / 55 |
| October | 31.2°C | 24.2°C | 34.1°C18 October 1998 | 18.3°C22 October 1978 | 39 / 54 |
| November | 29.8°C | 23.5°C | 33.6°C11 November 2023 | 14.4°C27 November 1966 | 35 / 54 |
| December | 29.0°C | 22.6°C | 32.6°C13 December 2007 | 12.8°C17 December 1972 | 35 / 54 |
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 28 to 40 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.