Weather on September 11 in Helsinki
Historical weather data for September 11 in Helsinki, Finland
Based on 55 years of data from HELSINKI RAUTATIENTORI
About This Date
September 11th in Helsinki, Finland typically brings mild fall weather, with average highs around 16°C and lows near 11°C. Over 55 years of records, the warmest September 11th was in 2025 (19°C average), while the coldest was 1973 (8°C) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 42% of September 11th dates historically, with the wettest September 11th recording 2.36" of rain. The last decade has been 4.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.6°F warmer on this date compared to 20-30 years ago.
Planning for September 11th 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) | 17°C (63°F) | 0 mm |
| 2024 | 19°C (66°F) | 14°C (58°F) | 6 mm |
| 2023 | 19°C (66°F) | 16°C (61°F) | 0 mm |
| 2022 | 18°C (64°F) | 6°C (43°F) | 0 mm |
| 2021 | 17°C (63°F) | 13°C (55°F) | 6 mm |
| 2020 | 16°C (61°F) | 10°C (50°F) | 1 mm |
| 2019 | 21°C (69°F) | 15°C (59°F) | 11 mm |
| 2018 | 18°C (65°F) | 13°C (56°F) | 60 mm |
| 2017 | 17°C (62°F) | 13°C (55°F) | 42 mm |
| 2016 | 18°C (65°F) | 13°C (55°F) | 0 mm |
| 2015 | 18°C (64°F) | 12°C (53°F) | -- |
| 2014 | 19°C (66°F) | 13°C (56°F) | -- |
| 2013 | 19°C (67°F) | 16°C (60°F) | -- |
| 2012 | 19°C (66°F) | 14°C (58°F) | -- |
| 2011 | 19°C (66°F) | 11°C (52°F) | -- |
| 2010 | 16°C (60°F) | 13°C (55°F) | -- |
| 2009 | 18°C (64°F) | 8°C (46°F) | 0 mm |
| 2008 | 12°C (53°F) | 6°C (43°F) | 0 mm |
| 2007 | 15°C (59°F) | 7°C (44°F) | 0 mm |
| 2006 | 21°C (70°F) | 10°C (50°F) | 0 mm |
| 2005 | 16°C (60°F) | 6°C (42°F) | 0 mm |
| 2004 | 18°C (64°F) | 12°C (53°F) | 0 mm |
| 2003 | 14°C (58°F) | 12°C (54°F) | 0 mm |
| 2002 | 17°C (63°F) | 8°C (46°F) | 0 mm |
| 2001 | 15°C (59°F) | 12°C (54°F) | 0 mm |
| 2000 | 16°C (60°F) | 8°C (47°F) | 0 mm |
| 1999 | 19°C (66°F) | 9°C (49°F) | 0 mm |
| 1998 | 18°C (64°F) | 16°C (60°F) | 0 mm |
| 1997 | 18°C (64°F) | 12°C (53°F) | 0 mm |
| 1996 | 12°C (53°F) | 7°C (45°F) | 2 mm |
| 1995 | 13°C (56°F) | 10°C (50°F) | 3 mm |
| 1994 | 14°C (58°F) | 12°C (54°F) | 20 mm |
| 1993 | 12°C (54°F) | 3°C (37°F) | 0 mm |
| 1992 | 17°C (62°F) | 8°C (47°F) | 0 mm |
| 1991 | 14°C (58°F) | 11°C (51°F) | 0 mm |
| 1990 | 12°C (53°F) | 7°C (44°F) | 0 mm |
| 1989 | 14°C (58°F) | 6°C (42°F) | 0 mm |
| 1988 | 17°C (62°F) | 14°C (57°F) | 14 mm |
| 1987 | 14°C (58°F) | 12°C (53°F) | 12 mm |
| 1986 | 13°C (56°F) | 11°C (51°F) | 21 mm |
| 1985 | 14°C (58°F) | 7°C (44°F) | 1 mm |
| 1984 | 16°C (60°F) | 12°C (54°F) | 1 mm |
| 1983 | 14°C (57°F) | 10°C (50°F) | 0 mm |
| 1982 | 16°C (60°F) | 8°C (47°F) | 0 mm |
| 1981 | 16°C (60°F) | 9°C (49°F) | 0 mm |
| 1980 | 16°C (60°F) | 12°C (54°F) | 0 mm |
| 1979 | 16°C (60°F) | 12°C (54°F) | 47 mm |
| 1978 | 15°C (59°F) | 11°C (52°F) | 46 mm |
| 1977 | 12°C (54°F) | 3°C (38°F) | 0 mm |
| 1976 | 16°C (60°F) | 11°C (51°F) | 0 mm |
| 1975 | 18°C (64°F) | 14°C (57°F) | 1 mm |
| 1974 | 16°C (61°F) | 10°C (50°F) | 0 mm |
| 1973 | 12°C (53°F) | 4°C (39°F) | 4 mm |
| 1972 | 21°C (69°F) | 15°C (59°F) | 0 mm |
| 1971 | 12°C (53°F) | 9°C (48°F) | 0 mm |