Diego Garcia Arpt climate by month
Averages and records for each calendar month at Diego Garcia Arpt, British Indian Ocean Territory, from 1972 to 2005. The warmest month is March, averaging 31.0°C; the coolest is July at 28.7°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 30.0°C | 24.9°C | 34.4°C22 January 1998 | 20.0°C9 January 1996 | 31 / 31 |
| February | 30.4°C | 25.1°C | 37.2°C9 February 1998 | 20.0°C1 February 1996 | 32 / 32 |
| March | 31.0°C | 25.5°C | 36.1°C16 March 1997 | 17.8°C8 March 1996 | 31 / 31 |
| April | 31.0°C | 25.8°C | 35.0°C23 April 1989 | 21.1°C4 April 1974 | 31 / 31 |
| May | 30.3°C | 25.5°C | 36.1°C3 May 1998 | 17.8°C20 May 1996 | 31 / 31 |
| June | 29.4°C | 24.8°C | 35.0°C6 June 1973 | 17.8°C5 June 1996 | 31 / 31 |
| July | 28.7°C | 24.3°C | 32.2°C6 July 1991 | 17.2°C2 July 1996 | 32 / 32 |
| August | 28.7°C | 24.1°C | 32.2°C30 August 1983 | 20.0°C18 August 1980 | 31 / 31 |
| September | 29.1°C | 24.3°C | 33.3°C6 September 1998 | 21.1°C4 September 1986 | 31 / 31 |
| October | 29.6°C | 24.5°C | 34.4°C13 October 1994 | 16.1°C30 October 1996 | 32 / 32 |
| November | 30.1°C | 24.9°C | 35.0°C12 November 1997 | 21.7°C2 November 1977 | 32 / 32 |
| December | 30.4°C | 25.0°C | 37.2°C7 December 2004 | 18.3°C22 December 1974 | 32 / 32 |
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 31 to 32 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.