FREDERICTON CDA CS, NB climate by month
Averages and records for each calendar month at FREDERICTON CDA CS, NB, Canada, from 2000 to 2026. The warmest month is July, averaging 25.7°C; the coolest is January at −3.6°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −3.6°C | −13.1°C | 14.7°C13 January 2005 | −35.0°C16 January 2009 | 26 / 26 |
| February | −2.0°C | −12.7°C | 16.4°C23 February 2022 | −29.1°C16 February 2004 | 25 / 26 |
| March | 3.2°C | −7.0°C | 26.5°C21 March 2012 | −29.9°C2 March 2001 | 25 / 26 |
| April | 10.3°C | −0.3°C | 29.1°C30 April 2004 | −17.1°C6 April 2015 | 25 / 26 |
| May | 17.6°C | 5.2°C | 32.6°C25 May 2007 | −2.4°C2 May 2015 | 24 / 25 |
| June | 22.3°C | 10.7°C | 35.3°C19 June 2020 | 0.5°C4 June 2018 | 26 / 26 |
| July | 25.7°C | 14.3°C | 34.6°C5 July 2018 | 6.8°C1 July 2010 | 24 / 26 |
| August | 25.1°C | 13.5°C | 35.2°C12 August 2025 | 4.4°C25 August 2003 | 26 / 26 |
| September | 21.0°C | 9.1°C | 33.7°C1 September 2010 | −1.4°C30 September 2000 | 24 / 26 |
| October | 13.9°C | 3.8°C | 30.0°C6 October 2025 | −7.3°C27 October 2018 | 24 / 25 |
| November | 6.5°C | −1.8°C | 23.4°C10 November 2020 | −16.4°C30 November 2014 | 24 / 24 |
| December | 0.0°C | −8.2°C | 17.3°C25 December 2020 | −26.5°C17 December 2016 | 24 / 24 |
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 24 to 26 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.