Weather on August 18 in Helsinki
Historical weather data for August 18 in Helsinki, Finland
Based on 55 years of data from HELSINKI RAUTATIENTORI
About This Date
August 18th in Helsinki, Finland typically brings mild summer weather, with average highs around 20°C and lows near 13°C. Over 55 years of records, the warmest August 18th was in 2022 (23°C average), while the coldest was 1998 (8°C) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 45% of August 18th dates historically, with the wettest August 18th recording 2.59" 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 August 18th in Helsinki? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 22°C (71°F) | 14°C (57°F) | 0 mm |
| 2024 | 22°C (71°F) | 13°C (55°F) | 0 mm |
| 2023 | 21°C (69°F) | 15°C (59°F) | 10 mm |
| 2022 | 27°C (80°F) | 20°C (68°F) | 0 mm |
| 2021 | 18°C (64°F) | 14°C (58°F) | 25 mm |
| 2020 | 22°C (71°F) | 10°C (50°F) | 0 mm |
| 2019 | 22°C (71°F) | 17°C (62°F) | 9 mm |
| 2018 | 23°C (74°F) | 18°C (65°F) | 9 mm |
| 2017 | 21°C (69°F) | 17°C (62°F) | 1 mm |
| 2016 | 19°C (66°F) | 13°C (56°F) | 7 mm |
| 2015 | 22°C (71°F) | 13°C (56°F) | -- |
| 2014 | 19°C (67°F) | 15°C (59°F) | -- |
| 2013 | 23°C (74°F) | 16°C (60°F) | -- |
| 2012 | 23°C (74°F) | 14°C (58°F) | -- |
| 2011 | 21°C (70°F) | 16°C (60°F) | -- |
| 2010 | 21°C (70°F) | 17°C (62°F) | -- |
| 2009 | 16°C (61°F) | 12°C (53°F) | 6 mm |
| 2008 | 21°C (69°F) | 16°C (61°F) | 2 mm |
| 2007 | 20°C (68°F) | 14°C (57°F) | 0 mm |
| 2006 | 23°C (73°F) | 16°C (60°F) | 3 mm |
| 2005 | 21°C (69°F) | 9°C (48°F) | 0 mm |
| 2004 | 22°C (71°F) | 13°C (56°F) | 6 mm |
| 2003 | 22°C (71°F) | 12°C (53°F) | 4 mm |
| 2002 | 22°C (72°F) | 12°C (54°F) | 0 mm |
| 2001 | 21°C (69°F) | 16°C (60°F) | 0 mm |
| 2000 | 19°C (67°F) | 12°C (53°F) | 9 mm |
| 1999 | 20°C (68°F) | 9°C (49°F) | 0 mm |
| 1998 | 16°C (61°F) | 1°C (34°F) | 20 mm |
| 1997 | 20°C (68°F) | 7°C (45°F) | 0 mm |
| 1996 | 23°C (74°F) | 16°C (60°F) | 0 mm |
| 1995 | 26°C (79°F) | 16°C (61°F) | 0 mm |
| 1994 | 16°C (60°F) | 8°C (47°F) | 1 mm |
| 1993 | 14°C (58°F) | 11°C (52°F) | 26 mm |
| 1992 | 16°C (61°F) | 13°C (56°F) | 6 mm |
| 1991 | 17°C (63°F) | 14°C (58°F) | 58 mm |
| 1990 | 20°C (68°F) | 16°C (60°F) | 0 mm |
| 1989 | 19°C (67°F) | 16°C (60°F) | 0 mm |
| 1988 | 17°C (62°F) | 12°C (53°F) | 0 mm |
| 1987 | 17°C (63°F) | 7°C (44°F) | 0 mm |
| 1986 | 17°C (63°F) | 13°C (55°F) | 66 mm |
| 1985 | 24°C (76°F) | 17°C (62°F) | 0 mm |
| 1984 | 17°C (63°F) | 6°C (43°F) | 4 mm |
| 1983 | 19°C (67°F) | 9°C (49°F) | 0 mm |
| 1982 | 18°C (64°F) | 14°C (57°F) | 0 mm |
| 1981 | 17°C (63°F) | 13°C (55°F) | 1 mm |
| 1980 | 20°C (68°F) | 11°C (52°F) | 0 mm |
| 1979 | 23°C (74°F) | 17°C (62°F) | 0 mm |
| 1978 | 18°C (65°F) | 13°C (56°F) | 3 mm |
| 1977 | 15°C (59°F) | 6°C (43°F) | 0 mm |
| 1976 | 22°C (72°F) | 13°C (55°F) | 3 mm |
| 1975 | 16°C (60°F) | 9°C (48°F) | 24 mm |
| 1974 | 18°C (64°F) | 13°C (56°F) | 0 mm |
| 1973 | 25°C (77°F) | 17°C (62°F) | 0 mm |
| 1972 | 19°C (67°F) | 15°C (59°F) | 9 mm |
| 1971 | 22°C (71°F) | 12°C (53°F) | 0 mm |