| Month | Average (°C) | Record (°C) | Average (cm) | |||
|---|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | Snow ❄️ | |
| January | -0.7 | -8.4 | 16.7 | -33.9 | 8.1 | 39.0 |
| February | 1.3 | -7.9 | 19.0 | -34.4 | 5.4 | 24.3 |
| March | 5.7 | -3.2 | 26.1 | -26.5 | 6.3 | 15.8 |
| April | 12.6 | 1.9 | 29.5 | -16.0 | 8.4 | 3.0 |
| May | 20.1 | 8.0 | 32.5 | -6.0 | 8.5 | 0.0 |
| June | 24.9 | 13.2 | 38.0 | -2.2 | 8.0 | 0.0 |
| July | 27.2 | 15.6 | 38.9 | 3.3 | 8.5 | 0.0 |
| August | 26.1 | 14.9 | 36.1 | 0.0 | 6.4 | 0.0 |
| September | 22.3 | 11.1 | 35.6 | -2.8 | 8.6 | 0.0 |
| October | 15.5 | 5.5 | 30.0 | -8.3 | 9.1 | 0.2 |
| November | 8.5 | 0.6 | 23.3 | -17.8 | 8.5 | 8.7 |
| December | 2.4 | -4.3 | 18.5 | -30.6 | 6.8 | 23.6 |
| Entire year | 13.9 | 4.0 | 38.9 | -34.4 | 91.3 | 111.6 |
|
More St. Thomas Weather Records
1882–2024
|
||
|---|---|---|
| Highest daily low | 26.0 °C | July 21, 2011 |
| Lowest daily high | -23.3 °C | February 8, 1934 |
| Greatest daily range (Difference of high and low) |
32.2 °C | January 24, 1970 |
| Greatest difference in daily high over two conscutive days |
21.5 °C | Apr 16–17, 2023 |
| Most daily precipitation | 10.5 cm | June 25, 1968 |
| Most monthly precipitation | 29.8 cm | August 1975 |
| Most yearly precipitation | 131.7 cm | 1990 |
| Most yearly days with precipitation | 205 | 1985 |
| Earliest snow in season | October 15 | 1982 |
| Latest snow in season | May 9 | 1885 |
| Most daily snow | 37.0 cm | November 23, 2013 |
| Most monthly snow | 120.6 cm | January 1976 |
| Most yearly snow | 249.2 cm | 1976 |
| Most snow in a winter | 252.1 cm | 1977–1978 |
| Greatest snow accumulation | 48.0 cm | January 13, 1999 |
| Earliest freeze | September 12 | 1943 |
| Earliest day ≥ 20 °C | March 8 | 2000 |
| Earliest day ≥ 25 °C | March 20 | 2012 |
| Earliest day ≥ 30 °C | May 6 | 1949 |
| Earliest day ≥ 35 °C | June 17 | 1994 |
| Latest freeze | June 11 | 1972 |
| Latest day ≥ 20 °C | November 23 | 1931 |
| Latest day ≥ 25 °C | October 26 | 1963 |
| Latest day ≥ 30 °C | October 6 | 1946 |
| Latest day ≥ 35 °C | September 12 | 1931 |
| Most days in a year < 0 °C | 171 | 1926 |
| Most days in a year ≥ 20 °C | 150 | 2021 |
| Most days in a year ≥ 25 °C | 99 | 1991 |
| Most days in a year ≥ 30 °C | 39 | 1955 |
| Most days in a year ≥ 35 °C | 7 | 1936 |
|
St. Thomas Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 20 days | Sep 17 – Oct 6, 1986 |
| Without precipitation | 27 days | Aug 21 – Sep 16, 1973 |
| With snow | 9 days | Dec 26, 1956 – Jan 3, 1957 |
| Freezing temperatures High temperature ≤ 0 °C |
46 days | Dec 26, 1976 – Feb 9, 1977 |
| High temperature ≥ 20 °C | 122 days | May 20 – Sep 18, 1991 |
| High temperature ≥ 25 °C | 42 days | Jun 27 – Aug 7, 1955 |
| High temperature ≥ 30 °C | 10 days | Jul 2–11, 2020 |
| High temperature ≥ 35 °C | 7 days | Jul 8–14, 1936 |