Weather on September 23 in Helsinki
Historical weather data for September 23 in Helsinki, Finland
Based on 55 years of data from HELSINKI RAUTATIENTORI
About This Date
September 23rd in Helsinki, Finland typically brings cool fall weather, with average highs around 13°C and lows near 8°C. Over 55 years of records, the warmest September 23rd was in 2023 (17°C average), while the coldest was 1977 (3°C) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 47% of September 23rd dates historically, with the wettest September 23rd recording 1.95" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for September 23rd 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 | 12°C (54°F) | 8°C (46°F) | 0.14" |
| 2024 | 16°C (60°F) | 7°C (44°F) | 0" |
| 2023 | 19°C (67°F) | 14°C (58°F) | 1.13" |
| 2022 | 13°C (56°F) | 7°C (45°F) | 0" |
| 2021 | 11°C (51°F) | 4°C (40°F) | 1.41" |
| 2020 | 17°C (62°F) | 9°C (49°F) | 0" |
| 2019 | 11°C (51°F) | 2°C (35°F) | 0" |
| 2018 | 14°C (57°F) | 9°C (49°F) | 0" |
| 2017 | 16°C (60°F) | 11°C (52°F) | 0" |
| 2016 | 11°C (51°F) | 6°C (42°F) | 0" |
| 2015 | 16°C (60°F) | 13°C (56°F) | -- |
| 2014 | 7°C (45°F) | 3°C (38°F) | -- |
| 2013 | 14°C (57°F) | 8°C (46°F) | -- |
| 2012 | 13°C (56°F) | 9°C (48°F) | -- |
| 2011 | 15°C (59°F) | 12°C (53°F) | -- |
| 2010 | 14°C (58°F) | 9°C (48°F) | -- |
| 2009 | 17°C (63°F) | 12°C (54°F) | 0.05" |
| 2008 | 14°C (58°F) | 6°C (43°F) | 0" |
| 2007 | 15°C (59°F) | 8°C (46°F) | 0" |
| 2006 | 19°C (66°F) | 12°C (53°F) | 0" |
| 2005 | 17°C (62°F) | 10°C (50°F) | 0" |
| 2004 | 13°C (55°F) | 9°C (48°F) | 0.05" |
| 2003 | 17°C (63°F) | 11°C (51°F) | 0.14" |
| 2002 | 9°C (48°F) | 3°C (37°F) | 0" |
| 2001 | 18°C (64°F) | 8°C (46°F) | 0.11" |
| 2000 | 16°C (60°F) | 2°C (36°F) | 0" |
| 1999 | 14°C (58°F) | 12°C (54°F) | 0.91" |
| 1998 | 13°C (56°F) | 5°C (41°F) | 0" |
| 1997 | 11°C (51°F) | 3°C (38°F) | 0.22" |
| 1996 | 13°C (55°F) | 8°C (46°F) | 0.01" |
| 1995 | 14°C (58°F) | 11°C (52°F) | 0.02" |
| 1994 | 16°C (60°F) | 6°C (43°F) | 0.01" |
| 1993 | 13°C (56°F) | 8°C (46°F) | 0.03" |
| 1992 | 16°C (60°F) | 11°C (51°F) | 0" |
| 1991 | 13°C (55°F) | 8°C (47°F) | 0.95" |
| 1990 | 8°C (46°F) | 3°C (38°F) | 0.01" |
| 1989 | 16°C (60°F) | 11°C (52°F) | 0" |
| 1988 | 13°C (56°F) | 8°C (47°F) | 0.23" |
| 1987 | 13°C (55°F) | 9°C (49°F) | 0.01" |
| 1986 | 11°C (51°F) | 3°C (37°F) | 0" |
| 1985 | 12°C (53°F) | 5°C (41°F) | 0" |
| 1984 | 13°C (55°F) | 11°C (52°F) | 0.48" |
| 1983 | 13°C (56°F) | 9°C (49°F) | 1.73" |
| 1982 | 14°C (57°F) | 11°C (51°F) | 0" |
| 1981 | 13°C (55°F) | 11°C (52°F) | 0.2" |
| 1980 | 16°C (60°F) | 8°C (46°F) | 0" |
| 1979 | 12°C (54°F) | 6°C (42°F) | 0.01" |
| 1978 | 8°C (47°F) | 3°C (38°F) | 0.03" |
| 1977 | 8°C (46°F) | -1°C (31°F) | 0.03" |
| 1976 | 13°C (55°F) | 2°C (36°F) | 0.01" |
| 1975 | 14°C (58°F) | 9°C (49°F) | 0.01" |
| 1974 | 14°C (58°F) | 10°C (50°F) | 1.95" |
| 1973 | 8°C (46°F) | 4°C (39°F) | 0" |
| 1972 | 13°C (56°F) | 6°C (42°F) | 0" |
| 1971 | 16°C (60°F) | 8°C (47°F) | 0" |