| Month | Average (°C) | Record (°C) | Average (cm) | ||
|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | |
| January | 0.5 | -5.7 | 20.0 | -23.5 | 3.6 |
| February | 0.9 | -5.1 | 19.4 | -23.9 | 3.2 |
| March | 4.7 | -1.8 | 26.7 | -19.4 | 4.0 |
| April | 11.0 | 3.5 | 32.2 | -15.0 | 7.6 |
| May | 17.1 | 8.5 | 32.5 | -4.4 | 6.9 |
| June | 22.9 | 14.7 | 36.1 | 1.0 | 8.1 |
| July | 26.2 | 18.4 | 40.0 | 4.0 | 6.6 |
| August | 25.6 | 18.3 | 38.3 | 4.0 | 5.5 |
| September | 22.0 | 14.8 | 36.7 | -0.5 | 6.7 |
| October | 15.3 | 8.5 | 31.1 | -7.0 | 5.7 |
| November | 8.8 | 3.1 | 26.4 | -13.9 | 5.4 |
| December | 3.6 | -1.6 | 21.0 | -24.4 | 4.8 |
| Entire year | 13.2 | 6.3 | 40.0 | -24.4 | 69.6 |
|
More St. Catharines Weather Records
1882–2024
|
||
|---|---|---|
| Highest daily low | 26.5 °C | July 6, 1993 |
| Lowest daily high | -20.6 °C | February 8, 1934 |
| Greatest daily range (Difference of high and low) |
30.5 °C | March 23, 1979 |
| Greatest difference in daily high over two conscutive days |
23.0 °C | Mar 10–11, 1992 |
| Most daily precipitation | 7.7 cm | September 29, 1924 |
| Most monthly precipitation | 23.9 cm | September 1977 |
| Most yearly precipitation | 107.7 cm | 1945 |
| Most yearly days with precipitation | 151 | 2023 |
| Earliest freeze | September 30 | 1991 |
| Earliest day ≥ 25 °C | March 22 | 1938 |
| Earliest day ≥ 30 °C | April 25 | 1990 |
| Earliest day ≥ 35 °C | June 5 | 1925 |
| Latest freeze | May 25 | 1956 |
| Latest day ≥ 25 °C | November 5 | 2022 |
| Latest day ≥ 30 °C | October 7 | 1941 |
| Latest day ≥ 35 °C | September 13 | 1952 |
| Most days in a year < 0 °C | 143 | 1926 |
| Most days in a year ≥ 20 °C | 158 | 1955 |
| Most days in a year ≥ 25 °C | 104 | 1955 |
| Most days in a year ≥ 30 °C | 53 | 1949 |
| Most days in a year ≥ 35 °C | 8 | 1955 |
| Most days in a year ≥ 40 °C | 1 | 1936 |
|
St. Catharines Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 11 days | Feb 6–16, 2015 |
| Without precipitation | 99 days | Jan 1 – Apr 9, 1995 |
| Freezing temperatures High temperature ≤ 0 °C |
26 days | Feb 5 – Mar 2, 2015 |
| High temperature ≥ 20 °C | 118 days | Jun 7 – Oct 2, 1921 |
| High temperature ≥ 25 °C | 70 days | Jun 10 – Aug 18, 1949 |
| High temperature ≥ 30 °C | 12 days | Aug 24 – Sep 4, 1953 |
| High temperature ≥ 35 °C | 6 days | Jul 8–13, 1936 |