Christchurch Aerodrome Aws climate by month
Averages and records for each calendar month at Christchurch Aerodrome Aws, New Zealand, from 1960 to 2025. The warmest month is January, averaging 23.0°C; the coolest is July at 11.5°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 23.0°C | 11.6°C | 37.1°C26 January 2021 | 1.0°C18 January 1984 | 20 / 48 |
| February | 22.3°C | 11.0°C | 36.0°C10 February 1981 | 1.5°C20 February 2003 | 16 / 48 |
| March | 20.3°C | 9.1°C | 32.0°C10 March 1990 | −1.3°C18 March 2020 | 32 / 48 |
| April | 17.6°C | 6.3°C | 29.9°C5 April 2021 | −4.0°C27 April 1979 | 31 / 49 |
| May | 14.8°C | 4.1°C | 26.6°C6 May 2015 | −6.4°C29 May 2015 | 30 / 49 |
| June | 12.0°C | 1.1°C | 22.5°C7 June 1988 | −6.1°C25 June 2005 | 33 / 49 |
| July | 11.5°C | 0.6°C | 22.4°C15 July 2012 | −7.0°C18 July 1980 | 34 / 49 |
| August | 12.6°C | 1.7°C | 22.2°C30 August 2020 | −6.1°C4 August 2024 | 34 / 48 |
| September | 15.1°C | 4.2°C | 26.2°C28 September 1987 | −4.8°C29 September 2020 | 25 / 48 |
| October | 17.2°C | 6.1°C | 29.1°C25 October 2020 | −4.0°C10 October 2013 | 25 / 48 |
| November | 19.5°C | 8.2°C | 31.4°C3 November 2019 | −2.7°C5 November 2015 | 15 / 48 |
| December | 21.4°C | 10.5°C | 36.0°C21 December 2015 | 0.1°C2 December 2006 | 17 / 48 |
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 15 to 34 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.