| Rank | Temperature | Date |
|---|---|---|
| 1 | 1.4 °C | August 10, 1878 |
| 2 | 1.7 °C | August 9, 1877 |
| 3 | 2.2 °C | August 10, 1877 |
| 4 | 2.8 °C | June 22, 1949 |
| 5 | 3.0 °C | July 9, 1986 |
| 5 | 3.0 °C | June 15, 1877 |
| 7 | 3.1 °C | August 1, 1893 |
| 7 | 3.1 °C | June 13, 1877 |
| 9 | 3.9 °C | August 21, 1962 |
| 9 | 3.9 °C | July 21, 1951 |
| 9 | 3.9 °C | August 2, 1943 |
| 9 | 3.9 °C | June 24, 1936 |
| 9 | 3.9 °C | June 25, 1908 |
| 9 | 3.9 °C | July 30, 1901 |
| 9 | 3.9 °C | June 20, 1901 |
| 9 | 3.9 °C | July 18, 1900 |
| 9 | 3.9 °C | August 17, 1862 |
| 18 | 4.0 °C | July 3, 1984 |
| 19 | 4.1 °C | July 19, 1982 |
| 20 | 4.2 °C | June 28, 1990 |