| Month | Average (°C) | Record (°C) | Average (cm) | |||
|---|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | Snow ❄️ | |
| January | -8.5 | -16.6 | 12.9 | -53.9 | 2.9 | 34.0 |
| February | -5.3 | -13.8 | 15.0 | -50.0 | 2.2 | 26.7 |
| March | -0.5 | -9.8 | 19.5 | -37.8 | 3.0 | 33.4 |
| April | 8.9 | -1.5 | 28.5 | -31.1 | 2.4 | 16.7 |
| May | 15.9 | 4.2 | 32.2 | -13.1 | 3.5 | 6.6 |
| June | 19.7 | 8.7 | 38.1 | -5.6 | 7.4 | 0.2 |
| July | 21.7 | 10.7 | 38.3 | -1.7 | 7.4 | 0.0 |
| August | 20.8 | 9.3 | 33.6 | -2.9 | 4.5 | 0.0 |
| September | 15.7 | 5.1 | 32.2 | -12.8 | 4.4 | 4.7 |
| October | 7.5 | -0.9 | 25.8 | -25.0 | 3.4 | 23.1 |
| November | -2.5 | -9.7 | 18.3 | -39.2 | 3.6 | 39.7 |
| December | -6.8 | -14.5 | 15.0 | -50.6 | 2.7 | 30.9 |
| Entire year | 7.3 | -2.4 | 38.3 | -53.9 | 47.3 | 214.3 |
|
More Fort St. John Weather Records
1910–2024
|
||
|---|---|---|
| Highest daily low | 20.9 °C | June 29, 2021 |
| Lowest daily high | -46.1 °C | December 30, 1933 |
| Greatest daily range (Difference of high and low) |
40.5 °C | February 23, 1911 |
| Greatest difference in daily high over two conscutive days |
33.9 °C | Jan 23–24, 1941 |
| Most daily precipitation | 8.0 cm | June 27, 1965 |
| Most monthly precipitation | 18.3 cm | July 1997 |
| Most yearly precipitation | 74.5 cm | 1957 |
| Most yearly days with precipitation | 149 | 1951 |
| Earliest snow in season | August 14 | 1950 |
| Latest snow in season | June 8 | 1933 |
| Most daily snow | 50.8 cm | October 26, 1918 |
| Most monthly snow | 144.8 cm | October 1918 |
| Most yearly snow | 382.9 cm | 1933 |
| Most snow in a winter | 373.2 cm | 1957–1958 |
| Greatest snow accumulation | 112.0 cm | March 29, 1974 |
| Earliest freeze | August 1 | 1941 |
| Earliest day ≥ 20 °C | April 1 | 2016 |
| Earliest day ≥ 25 °C | April 18 | 2016 |
| Earliest day ≥ 30 °C | May 15 | 2023 |
| Latest freeze | July 22 | 1933 |
| Latest day ≥ 20 °C | October 30 | 1958 |
| Latest day ≥ 25 °C | October 6 | 1964 |
| Latest day ≥ 30 °C | September 9 | 1944 |
| Most days in a year < 0 °C | 222 | 1933 |
| Most days in a year ≥ 20 °C | 110 | 2023 |
| Most days in a year ≥ 25 °C | 48 | 2023 |
| Most days in a year ≥ 30 °C | 9 | 2021 |
| Most days in a year ≥ 35 °C | 4 | 2021 |
|
Fort St. John Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 20 days | Dec 30, 1993 – Jan 18, 1994 |
| Without precipitation | 67 days | Feb 11 – Apr 17, 1936 |
| With snow | 20 days | Dec 30, 1993 – Jan 18, 1994 |
| Freezing temperatures High temperature ≤ 0 °C |
80 days | Dec 3, 1949 – Feb 20, 1950 |
| High temperature ≥ 20 °C | 35 days | Jul 21 – Aug 24, 1998 |
| High temperature ≥ 25 °C | 12 days | Jul 25 – Aug 5, 1965 |
| High temperature ≥ 30 °C | 6 days | Jun 25–30, 2021 |
| High temperature ≥ 35 °C | 4 days | Jun 27–30, 2021 |