Weather on August 21 in Helsinki
Historical weather data for August 21 in Helsinki, Finland
Based on 55 years of data from HELSINKI RAUTATIENTORI
About This Date
August 21st in Helsinki, Finland typically brings mild summer weather, with average highs around 19°C and lows near 13°C. Over 55 years of records, the warmest August 21st was in 2022 (22°C average), while the coldest was 1977 (11°C) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 45% of August 21st dates historically, with the wettest August 21st recording 3.68" of rain. The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
Planning for August 21st in Helsinki? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 16°C (61°F) | 7°C (45°F) | 0 mm |
| 2024 | 22°C (71°F) | 16°C (61°F) | 3 mm |
| 2023 | 21°C (70°F) | 12°C (53°F) | 0 mm |
| 2022 | 23°C (74°F) | 19°C (67°F) | 1 mm |
| 2021 | 18°C (65°F) | 11°C (52°F) | 66 mm |
| 2020 | 24°C (75°F) | 16°C (60°F) | 3 mm |
| 2019 | 19°C (67°F) | 16°C (61°F) | 0 mm |
| 2018 | 19°C (67°F) | 11°C (52°F) | 0 mm |
| 2017 | 18°C (65°F) | 15°C (59°F) | 0 mm |
| 2016 | 23°C (73°F) | 14°C (58°F) | 0 mm |
| 2015 | 22°C (72°F) | 14°C (57°F) | -- |
| 2014 | 18°C (64°F) | 12°C (53°F) | -- |
| 2013 | 20°C (68°F) | 15°C (59°F) | -- |
| 2012 | 17°C (63°F) | 12°C (53°F) | -- |
| 2011 | 21°C (69°F) | 13°C (56°F) | -- |
| 2010 | 22°C (71°F) | 14°C (58°F) | -- |
| 2009 | 18°C (65°F) | 11°C (51°F) | 0 mm |
| 2008 | 20°C (68°F) | 16°C (61°F) | 0 mm |
| 2007 | 23°C (74°F) | 13°C (56°F) | 5 mm |
| 2006 | 23°C (74°F) | 16°C (61°F) | 2 mm |
| 2005 | 21°C (70°F) | 15°C (59°F) | 2 mm |
| 2004 | 21°C (69°F) | 17°C (62°F) | 0 mm |
| 2003 | 21°C (69°F) | 13°C (56°F) | 52 mm |
| 2002 | 25°C (77°F) | 16°C (60°F) | 0 mm |
| 2001 | 21°C (69°F) | 17°C (63°F) | 0 mm |
| 2000 | 18°C (64°F) | 14°C (58°F) | 0 mm |
| 1999 | 18°C (64°F) | 12°C (53°F) | 0 mm |
| 1998 | 17°C (63°F) | 14°C (58°F) | 23 mm |
| 1997 | 22°C (71°F) | 17°C (62°F) | 0 mm |
| 1996 | 23°C (73°F) | 17°C (62°F) | 0 mm |
| 1995 | 18°C (65°F) | 7°C (45°F) | 0 mm |
| 1994 | 16°C (61°F) | 13°C (55°F) | 0 mm |
| 1993 | 17°C (62°F) | 9°C (48°F) | 0 mm |
| 1992 | 16°C (60°F) | 11°C (52°F) | 2 mm |
| 1991 | 21°C (69°F) | 12°C (54°F) | 0 mm |
| 1990 | 21°C (69°F) | 11°C (51°F) | 0 mm |
| 1989 | 17°C (62°F) | 14°C (57°F) | 93 mm |
| 1988 | 16°C (61°F) | 13°C (56°F) | 27 mm |
| 1987 | 18°C (64°F) | 11°C (51°F) | 0 mm |
| 1986 | 18°C (64°F) | 12°C (53°F) | 11 mm |
| 1985 | 19°C (66°F) | 16°C (61°F) | 45 mm |
| 1984 | 23°C (73°F) | 12°C (53°F) | 0 mm |
| 1983 | 20°C (68°F) | 9°C (49°F) | 0 mm |
| 1982 | 17°C (62°F) | 13°C (55°F) | 6 mm |
| 1981 | 16°C (61°F) | 13°C (56°F) | 31 mm |
| 1980 | 18°C (65°F) | 14°C (58°F) | 29 mm |
| 1979 | 18°C (65°F) | 16°C (61°F) | 16 mm |
| 1978 | 19°C (67°F) | 9°C (49°F) | 0 mm |
| 1977 | 14°C (57°F) | 8°C (46°F) | 0 mm |
| 1976 | 18°C (64°F) | 7°C (44°F) | 0 mm |
| 1975 | 21°C (69°F) | 11°C (51°F) | 2 mm |
| 1974 | 18°C (65°F) | 8°C (47°F) | 0 mm |
| 1973 | 17°C (62°F) | 10°C (50°F) | 2 mm |
| 1972 | 21°C (70°F) | 17°C (63°F) | 4 mm |
| 1971 | 23°C (74°F) | 14°C (57°F) | 0 mm |