Weather on December 21 in Helsinki
Historical weather data for December 21 in Helsinki, Finland
Based on 55 years of data from HELSINKI RAUTATIENTORI
About This Date
December 21st in Helsinki, Finland typically brings cold winter weather, with average highs around 0°C and lows near -4°C. Over 55 years of records, the warmest December 21st was in 2015 (8°C average), while the coldest was 1978 (-16°C) — a 44°F range across recorded history. Rain or other precipitation has occurred on about 49% of December 21st dates historically, with the wettest December 21st recording 2.49" of rain. The last decade has been 11.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 11.2°F warmer on this date compared to 20-30 years ago.
Planning for December 21st 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 (44°F) | 2°C (35°F) | 0" |
| 2024 | 1°C (34°F) | -4°C (25°F) | 0.77" |
| 2023 | 2°C (36°F) | -2°C (28°F) | 0.79" |
| 2022 | 4°C (39°F) | 1°C (33°F) | 0.02" |
| 2021 | -7°C (19°F) | -12°C (10°F) | 0" |
| 2020 | 4°C (40°F) | 3°C (37°F) | 0.25" |
| 2019 | 4°C (39°F) | 3°C (37°F) | 0" |
| 2018 | -2°C (29°F) | -8°C (18°F) | 0.06" |
| 2017 | 4°C (40°F) | 1°C (33°F) | 0" |
| 2016 | 4°C (39°F) | 3°C (37°F) | 0" |
| 2015 | 9°C (48°F) | 8°C (46°F) | 0" |
| 2014 | 2°C (35°F) | -1°C (31°F) | -- |
| 2013 | 5°C (41°F) | 4°C (39°F) | -- |
| 2012 | -8°C (18°F) | -11°C (12°F) | -- |
| 2011 | 4°C (39°F) | 1°C (34°F) | -- |
| 2010 | -4°C (24°F) | -7°C (19°F) | -- |
| 2009 | -8°C (18°F) | -11°C (12°F) | -- |
| 2008 | 4°C (40°F) | 2°C (35°F) | 0.47" |
| 2007 | 5°C (41°F) | 3°C (37°F) | 0" |
| 2006 | 4°C (40°F) | 1°C (34°F) | 0" |
| 2005 | -4°C (24°F) | -9°C (16°F) | 0" |
| 2004 | -1°C (30°F) | -6°C (22°F) | 0.01" |
| 2003 | -1°C (31°F) | -7°C (20°F) | 2.49" |
| 2002 | 0°C (32°F) | -8°C (18°F) | 0" |
| 2001 | -4°C (24°F) | -16°C (3°F) | 0.94" |
| 2000 | -2°C (28°F) | -7°C (20°F) | 0" |
| 1999 | -5°C (23°F) | -10°C (14°F) | 0" |
| 1998 | -2°C (29°F) | -12°C (10°F) | 0" |
| 1997 | -1°C (30°F) | -7°C (19°F) | 0" |
| 1996 | -2°C (28°F) | -13°C (8°F) | 0.28" |
| 1995 | -11°C (13°F) | -16°C (4°F) | 0.01" |
| 1994 | -1°C (31°F) | -2°C (29°F) | 0.89" |
| 1993 | 1°C (33°F) | -2°C (29°F) | 0" |
| 1992 | 0°C (32°F) | -6°C (22°F) | 0" |
| 1991 | 4°C (39°F) | 2°C (35°F) | 0" |
| 1990 | 3°C (37°F) | -2°C (29°F) | 0.23" |
| 1989 | 2°C (35°F) | -3°C (27°F) | 1.28" |
| 1988 | 1°C (33°F) | -7°C (19°F) | 0.17" |
| 1987 | 2°C (36°F) | -11°C (12°F) | 0.03" |
| 1986 | -8°C (17°F) | -12°C (11°F) | 0.68" |
| 1985 | 1°C (33°F) | -17°C (2°F) | 0.95" |
| 1984 | 3°C (37°F) | 2°C (35°F) | 1.47" |
| 1983 | 3°C (37°F) | 1°C (33°F) | 0.04" |
| 1982 | 4°C (40°F) | 1°C (34°F) | 0.74" |
| 1981 | -6°C (22°F) | -8°C (17°F) | 0.22" |
| 1980 | 1°C (34°F) | -1°C (31°F) | 0.01" |
| 1979 | -2°C (28°F) | -13°C (8°F) | 0" |
| 1978 | -14°C (6°F) | -17°C (1°F) | 0" |
| 1977 | 1°C (34°F) | -10°C (14°F) | 0.28" |
| 1976 | 2°C (35°F) | -2°C (28°F) | 0" |
| 1975 | 4°C (40°F) | -2°C (29°F) | 0.06" |
| 1974 | 5°C (41°F) | 1°C (34°F) | 0.04" |
| 1973 | -3°C (26°F) | -11°C (13°F) | 0" |
| 1972 | 3°C (38°F) | 1°C (33°F) | 0" |
| 1971 | 2°C (36°F) | -4°C (24°F) | 1.18" |