Weather on December 20 in Helsinki
Historical weather data for December 20 in Helsinki, Finland
Based on 55 years of data from HELSINKI RAUTATIENTORI
About This Date
December 20th in Helsinki, Finland typically brings cold winter weather, with average highs around 1°C and lows near -4°C. Over 55 years of records, the warmest December 20th was in 2015 (7°C average), while the coldest was 1978 (-13°C) — a 36°F range across recorded history. Rain or other precipitation has occurred on about 58% of December 20th dates historically, with the wettest December 20th recording 1.08" of rain. The last decade has been 9.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 9.7°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in Helsinki? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 7°C (45°F) | 6°C (43°F) | 0.02" |
| 2024 | 6°C (42°F) | -2°C (28°F) | 0.07" |
| 2023 | 2°C (36°F) | -2°C (28°F) | 0.47" |
| 2022 | 2°C (35°F) | -2°C (29°F) | 0.57" |
| 2021 | -2°C (29°F) | -10°C (14°F) | 0" |
| 2020 | 7°C (44°F) | 4°C (39°F) | 0.22" |
| 2019 | 4°C (40°F) | 1°C (33°F) | 0.01" |
| 2018 | 1°C (33°F) | -3°C (26°F) | 0" |
| 2017 | 4°C (39°F) | 1°C (33°F) | 0.19" |
| 2016 | 3°C (38°F) | 1°C (33°F) | 0.01" |
| 2015 | 11°C (51°F) | 3°C (37°F) | 0.08" |
| 2014 | 5°C (41°F) | 2°C (35°F) | -- |
| 2013 | 6°C (42°F) | 2°C (35°F) | -- |
| 2012 | -7°C (19°F) | -11°C (12°F) | -- |
| 2011 | 4°C (39°F) | 3°C (37°F) | -- |
| 2010 | -4°C (24°F) | -11°C (13°F) | -- |
| 2009 | -3°C (27°F) | -9°C (16°F) | -- |
| 2008 | 3°C (38°F) | 1°C (34°F) | 0.11" |
| 2007 | 6°C (42°F) | 3°C (37°F) | 0" |
| 2006 | 3°C (37°F) | -4°C (25°F) | 0.05" |
| 2005 | -5°C (23°F) | -11°C (13°F) | 0" |
| 2004 | 1°C (33°F) | -3°C (27°F) | 0.04" |
| 2003 | 5°C (41°F) | -5°C (23°F) | 0" |
| 2002 | 2°C (36°F) | -1°C (31°F) | 0.01" |
| 2001 | -7°C (20°F) | -14°C (6°F) | 0.02" |
| 2000 | -2°C (29°F) | -5°C (23°F) | 0" |
| 1999 | -2°C (28°F) | -8°C (18°F) | 0" |
| 1998 | 1°C (33°F) | -2°C (29°F) | 0.02" |
| 1997 | -1°C (31°F) | -6°C (21°F) | 0" |
| 1996 | -7°C (20°F) | -11°C (13°F) | 0.23" |
| 1995 | -3°C (27°F) | -12°C (11°F) | 0.17" |
| 1994 | -1°C (31°F) | -3°C (27°F) | 0.39" |
| 1993 | 4°C (39°F) | 0°C (32°F) | 0.08" |
| 1992 | 5°C (41°F) | -1°C (30°F) | 0" |
| 1991 | 4°C (39°F) | 1°C (34°F) | 0.54" |
| 1990 | 2°C (35°F) | -3°C (26°F) | 0.26" |
| 1989 | 4°C (39°F) | 1°C (33°F) | 0.01" |
| 1988 | -7°C (19°F) | -16°C (4°F) | 0" |
| 1987 | 1°C (34°F) | -2°C (29°F) | 0.01" |
| 1986 | -11°C (13°F) | -12°C (10°F) | 0.58" |
| 1985 | -4°C (24°F) | -12°C (11°F) | 0" |
| 1984 | 3°C (38°F) | 1°C (33°F) | 0" |
| 1983 | 1°C (34°F) | -4°C (24°F) | 0.38" |
| 1982 | 3°C (38°F) | -1°C (31°F) | 0.98" |
| 1981 | -5°C (23°F) | -9°C (15°F) | 1.08" |
| 1980 | 0°C (32°F) | -3°C (26°F) | 0.36" |
| 1979 | -9°C (15°F) | -13°C (9°F) | 0" |
| 1978 | -11°C (13°F) | -16°C (3°F) | 0" |
| 1977 | 3°C (38°F) | -1°C (30°F) | 0" |
| 1976 | 0°C (32°F) | -12°C (11°F) | 0" |
| 1975 | 1°C (33°F) | -12°C (11°F) | 0.07" |
| 1974 | 3°C (37°F) | -2°C (29°F) | 0.55" |
| 1973 | -1°C (31°F) | -11°C (13°F) | 0.02" |
| 1972 | 3°C (38°F) | -1°C (31°F) | 0.04" |
| 1971 | -2°C (28°F) | -10°C (14°F) | 0" |