Weather on October 21 in Helsinki
Historical weather data for October 21 in Helsinki, Finland
Based on 55 years of data from HELSINKI RAUTATIENTORI
About This Date
October 21st in Helsinki, Finland typically brings chilly fall weather, with average highs around 8°C and lows near 3°C. Over 55 years of records, the warmest October 21st was in 2024 (12°C average), while the coldest was 2002 (-3°C) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 51% of October 21st dates historically, with the wettest October 21st recording 2.06" of rain. The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in Helsinki? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 9°C (49°F) | 5°C (41°F) | 0" |
| 2024 | 13°C (56°F) | 10°C (50°F) | 0.02" |
| 2023 | 6°C (42°F) | -1°C (31°F) | 0.12" |
| 2022 | 11°C (51°F) | 7°C (44°F) | 0.02" |
| 2021 | 12°C (53°F) | 10°C (50°F) | 1.2" |
| 2020 | 8°C (46°F) | 0°C (32°F) | 0.44" |
| 2019 | 11°C (51°F) | 4°C (40°F) | 0.02" |
| 2018 | 11°C (52°F) | 4°C (40°F) | 0.22" |
| 2017 | 7°C (44°F) | -2°C (28°F) | 0" |
| 2016 | 6°C (43°F) | 3°C (38°F) | 0" |
| 2015 | 9°C (49°F) | 7°C (44°F) | 0" |
| 2014 | 6°C (43°F) | 1°C (33°F) | -- |
| 2013 | 6°C (42°F) | -2°C (29°F) | -- |
| 2012 | 11°C (51°F) | 6°C (43°F) | -- |
| 2011 | 9°C (48°F) | 4°C (39°F) | -- |
| 2010 | 7°C (45°F) | 1°C (34°F) | -- |
| 2009 | 7°C (44°F) | 3°C (37°F) | 0" |
| 2008 | 12°C (54°F) | 10°C (50°F) | 0.37" |
| 2007 | 6°C (42°F) | -4°C (24°F) | 0" |
| 2006 | 8°C (46°F) | 6°C (42°F) | 1.12" |
| 2005 | 13°C (55°F) | 9°C (49°F) | 0.18" |
| 2004 | 7°C (44°F) | 3°C (38°F) | 0.24" |
| 2003 | 2°C (36°F) | -3°C (26°F) | 0" |
| 2002 | 2°C (36°F) | -8°C (18°F) | 0" |
| 2001 | 7°C (45°F) | 0°C (32°F) | 0.02" |
| 2000 | 10°C (50°F) | 6°C (42°F) | 0" |
| 1999 | 8°C (47°F) | 2°C (35°F) | 0" |
| 1998 | 7°C (45°F) | 2°C (36°F) | 0.01" |
| 1997 | 3°C (38°F) | -2°C (29°F) | 0.11" |
| 1996 | 7°C (45°F) | 7°C (44°F) | 0.51" |
| 1995 | 6°C (43°F) | 3°C (37°F) | 0.01" |
| 1994 | 7°C (45°F) | 4°C (40°F) | 0" |
| 1993 | 7°C (44°F) | 1°C (34°F) | 0" |
| 1992 | 6°C (43°F) | -1°C (31°F) | 0" |
| 1991 | 3°C (38°F) | 1°C (33°F) | 0.01" |
| 1990 | 3°C (37°F) | -1°C (30°F) | 0" |
| 1989 | 10°C (50°F) | 9°C (48°F) | 0.73" |
| 1988 | 8°C (47°F) | 2°C (35°F) | 0" |
| 1987 | 6°C (42°F) | 3°C (38°F) | 0" |
| 1986 | 8°C (46°F) | 6°C (42°F) | 2.06" |
| 1985 | 11°C (52°F) | 4°C (39°F) | 0" |
| 1984 | 11°C (52°F) | 8°C (47°F) | 0.95" |
| 1983 | 8°C (46°F) | 4°C (39°F) | 0" |
| 1982 | 7°C (45°F) | 3°C (37°F) | 0" |
| 1981 | 11°C (51°F) | 5°C (41°F) | 0.16" |
| 1980 | 9°C (48°F) | 4°C (40°F) | 0.6" |
| 1979 | 9°C (48°F) | 5°C (41°F) | 0.03" |
| 1978 | 8°C (46°F) | 1°C (33°F) | 0" |
| 1977 | 8°C (46°F) | 3°C (38°F) | 0" |
| 1976 | 5°C (41°F) | 1°C (33°F) | 0" |
| 1975 | 7°C (44°F) | -2°C (28°F) | 0.01" |
| 1974 | 9°C (48°F) | 6°C (42°F) | 0.72" |
| 1973 | 2°C (36°F) | -2°C (28°F) | 0.01" |
| 1972 | 5°C (41°F) | 3°C (37°F) | 0.3" |
| 1971 | 9°C (49°F) | 5°C (41°F) | 0.05" |