Herbert Isl climate by month
Averages and records for each calendar month at Herbert Isl , Canada, from 1995 to 2026. The warmest month is August, averaging 15.7°C; the coolest is December at 6.9°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 7.1°C | 4.4°C | 14.0°C15 January 2018 | −9.2°C17 January 2012 | 27 / 31 |
| February | 7.2°C | 4.0°C | 15.8°C23 February 2009 | −4.7°C3 February 2019 | 26 / 30 |
| March | 8.2°C | 4.6°C | 16.6°C3 March 2009 | −3.0°C8 March 2002 | 29 / 31 |
| April | 10.2°C | 6.1°C | 21.4°C28 April 2009 | 0.1°C1 April 2009 | 30 / 31 |
| May | 12.2°C | 8.1°C | 23.6°C10 May 2020 | 2.3°C4 May 1999 | 29 / 30 |
| June | 13.6°C | 9.7°C | 25.2°C26 June 2021 | 5.7°C2 June 2001 | 26 / 30 |
| July | 15.2°C | 10.8°C | 21.4°C28 July 2021 | 8.1°C9 July 2001 | 27 / 29 |
| August | 15.7°C | 11.1°C | 24.0°C14 August 2010 | 7.6°C7 August 2008 | 27 / 29 |
| September | 14.1°C | 10.0°C | 22.8°C11 September 2013 | 6.4°C25 September 2013 | 27 / 30 |
| October | 11.3°C | 8.1°C | 19.4°C7 October 2023 | 2.7°C11 October 2006 | 27 / 30 |
| November | 8.8°C | 6.0°C | 15.2°C4 November 2010 | −4.5°C28 November 2006 | 27 / 28 |
| December | 6.9°C | 4.3°C | 13.2°C29 December 2023 | −7.3°C28 December 1996 | 25 / 29 |
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 25 to 30 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.