GANDER AIRPORT CS, NFLD climate by month
Averages and records for each calendar month at GANDER AIRPORT CS, NFLD, Canada, from 2005 to 2026. The warmest month is July, averaging 22.6°C; the coolest is February at −2.3°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −1.7°C | −8.7°C | 14.0°C15 January 2006 | −22.5°C2 January 2014 | 21 / 21 |
| February | −2.3°C | −9.7°C | 11.2°C26 February 2016 | −21.3°C26 February 2023 | 21 / 21 |
| March | 0.4°C | −7.1°C | 14.6°C18 March 2025 | −20.9°C5 March 2014 | 21 / 21 |
| April | 5.9°C | −2.3°C | 21.2°C28 April 2018 | −13.4°C9 April 2015 | 21 / 21 |
| May | 11.9°C | 1.8°C | 31.0°C22 May 2012 | −4.5°C21 May 2013 | 20 / 21 |
| June | 17.5°C | 6.9°C | 33.7°C20 June 2024 | −2.0°C3 June 2018 | 20 / 21 |
| July | 22.6°C | 12.2°C | 33.1°C17 July 2025 | 2.5°C7 July 2016 | 20 / 22 |
| August | 21.7°C | 12.1°C | 34.2°C12 August 2025 | 3.1°C28 August 2006 | 20 / 22 |
| September | 17.3°C | 8.0°C | 27.4°C1 September 2022 | −0.8°C26 September 2009 | 20 / 22 |
| October | 10.9°C | 3.2°C | 25.0°C1 October 2010 | −4.4°C30 October 2020 | 18 / 21 |
| November | 5.7°C | −1.0°C | 20.5°C6 November 2008 | −12.0°C30 November 2015 | 19 / 21 |
| December | 0.3°C | −5.8°C | 15.3°C13 December 2008 | −17.9°C26 December 2013 | 20 / 21 |
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 18 to 21 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.