| Month | Average (°C) | Record (°C) | Average (cm) | |||
|---|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | Snow ❄️ | |
| January | -2.4 | -13.1 | 14.8 | -33.2 | 12.1 | 61.7 |
| February | -1.4 | -12.5 | 14.5 | -36.7 | 10.3 | 54.4 |
| March | 2.6 | -7.6 | 25.4 | -30.0 | 10.9 | 40.1 |
| April | 8.8 | -1.6 | 23.9 | -17.8 | 9.9 | 13.9 |
| May | 15.3 | 3.5 | 33.0 | -7.8 | 9.7 | 0.8 |
| June | 20.1 | 8.2 | 32.0 | -2.2 | 9.6 | 0.0 |
| July | 23.1 | 11.5 | 33.7 | 1.1 | 8.6 | 0.0 |
| August | 23.0 | 11.2 | 34.4 | -0.6 | 7.8 | 0.0 |
| September | 19.0 | 7.5 | 33.9 | -6.7 | 11.0 | 0.0 |
| October | 12.9 | 2.7 | 28.9 | -10.6 | 13.1 | 0.7 |
| November | 6.9 | -2.0 | 21.7 | -22.8 | 13.6 | 12.7 |
| December | 1.1 | -8.5 | 16.4 | -34.4 | 13.4 | 42.9 |
| Entire year | 10.9 | 0.0 | 34.4 | -36.7 | 130.1 | 222.1 |
|
More Saint John Weather Records
1871–2024
|
||
|---|---|---|
| Highest daily low | 20.6 °C | July 7, 1908 |
| Lowest daily high | -24.4 °C | December 29, 1933 |
| Greatest daily range (Difference of high and low) |
35.6 °C | February 11, 1948 |
| Greatest difference in daily high over two conscutive days |
26.0 °C | Jan 16–17, 1994 |
| Most daily precipitation | 15.4 cm | November 13, 1975 |
| Most monthly precipitation | 30.7 cm | December 1964 |
| Most yearly precipitation | 197.5 cm | 1979 |
| Most yearly days with precipitation | 193 | 1979 |
| Earliest snow in season | October 8 | 1988 |
| Latest snow in season | May 27 | 1915 |
| Most daily snow | 58.4 cm | March 30, 1878 |
| Most monthly snow | 184.4 cm | February 2015 |
| Most yearly snow | 493.4 cm | 2015 |
| Most snow in a winter | 494.8 cm | 2014–2015 |
| Greatest snow accumulation | 218.0 cm | February 27, 2015 |
| Earliest freeze | August 28 | 1947 |
| Earliest day ≥ 20 °C | March 21 | 2012 |
| Earliest day ≥ 25 °C | March 21 | 2012 |
| Earliest day ≥ 30 °C | May 22 | 1992 |
| Latest freeze | June 12 | 2018 |
| Latest day ≥ 20 °C | November 1 | 1956 |
| Latest day ≥ 25 °C | October 18 | 1947 |
| Latest day ≥ 30 °C | September 10 | 2002 |
| Most days in a year < 0 °C | 199 | 1948 |
| Most days in a year ≥ 20 °C | 99 | 2017 |
| Most days in a year ≥ 25 °C | 36 | 2020 |
| Most days in a year ≥ 30 °C | 5 | 2013 |
|
Saint John Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 16 days | Apr 13–28, 2019 |
| Without precipitation | 24 days | Aug 22 – Sep 14, 1889 |
| With snow | 12 days | Feb 5–16, 2017 |
| Freezing temperatures High temperature ≤ 0 °C |
30 days | Dec 30, 1969 – Jan 28, 1970 |
| High temperature ≥ 20 °C | 51 days | Jul 5 – Aug 24, 2023 |
| High temperature ≥ 25 °C | 10 days | Aug 16–25, 2015 |
| High temperature ≥ 30 °C | 4 days | Jul 4–7, 2013 |