| Month | Average (°C) | Record (°C) | Average (cm) | ||
|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | |
| January | -0.8 | -5.6 | 8.5 | -34.3 | 5.3 |
| February | -1.3 | -6.4 | 10.2 | -31.5 | 3.8 |
| March | 2.3 | -3.6 | 15.1 | -22.1 | 3.4 |
| April | 8.1 | 1.1 | 21.9 | -13.5 | 3.4 |
| May | 14.5 | 6.4 | 27.6 | -3.1 | 3.8 |
| June | 18.8 | 11.2 | 30.5 | 1.0 | 6.0 |
| July | 21.9 | 14.5 | 33.2 | 7.0 | 5.7 |
| August | 20.5 | 13.5 | 31.2 | 2.8 | 8.1 |
| September | 15.4 | 9.3 | 26.2 | -4.5 | 5.6 |
| October | 9.1 | 4.2 | 17.5 | -11.6 | 7.3 |
| November | 4.4 | 0.4 | 14.3 | -18.6 | 6.9 |
| December | 1.4 | -2.9 | 10.5 | -29.5 | 5.8 |
| Entire year | 9.6 | 3.6 | 33.2 | -34.3 | 65.3 |
|
More Helsinki Weather Records
1951–2024
|
||
|---|---|---|
| Highest daily low | 22.8 °C | July 29, 2018 |
| Lowest daily high | -24.7 °C | January 6, 1987 |
| Greatest daily range (Difference of high and low) |
27.5 °C | December 10, 1973 |
| Greatest difference in daily high over two conscutive days |
25.1 °C | Dec 9–10, 1973 |
| Most daily precipitation | 7.9 cm | July 24, 1993 |
| Most monthly precipitation | 18.4 cm | October 2006 |
| Most yearly precipitation | 90.7 cm | 2012 |
| Most yearly days with precipitation | 236 | 1977 |
| Earliest freeze | September 18 | 1993 |
| Earliest day ≥ 20 °C | April 24 | 2000 |
| Earliest day ≥ 25 °C | May 3 | 1990 |
| Latest freeze | May 30 | 1975 |
| Latest day ≥ 20 °C | September 30 | 2011 |
| Latest day ≥ 25 °C | September 7 | 1968 |
| Most days in a year < 0 °C | 165 | 1952 |
| Most days in a year ≥ 20 °C | 85 | 2006 |
| Most days in a year ≥ 25 °C | 32 | 2021 |
| Most days in a year ≥ 30 °C | 2 | 2021 |
|
Helsinki Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 33 days | Nov 4 – Dec 6, 1979 |
| Without precipitation | 30 days | May 4 – Jun 2, 2018 |
| Freezing temperatures High temperature ≤ 0 °C |
75 days | Dec 26, 1984 – Mar 10, 1985 |
| High temperature ≥ 20 °C | 62 days | Jun 23 – Aug 23, 2010 |
| High temperature ≥ 25 °C | 16 days | Jul 3–18, 2021 |
| Years | Station | Coordinates |
|---|---|---|
| 1951–2024 | Helsinki Kaisaniemi Aws | location |