Weather on September 18 in Oslo
Historical weather data for September 18 in Oslo, Norway
Based on 55 years of data from OSLO - BLINDERN PLU
About This Date
September 18th in Oslo, Norway typically brings mild fall weather, with average highs around 16°C and lows near 8°C. Over 55 years of records, the warmest September 18th was in 2003 (17°C average), while the coldest was 1993 (6°C) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 38% of September 18th dates historically, with the wettest September 18th recording 4.23" of rain. The last decade has been 1.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.0°F warmer on this date compared to 20-30 years ago.
Planning for September 18th in Oslo? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 17°C (63°F) | 10°C (50°F) | 0.25" |
| 2024 | 20°C (68°F) | 11°C (51°F) | 0" |
| 2023 | 13°C (56°F) | 9°C (49°F) | 4.23" |
| 2022 | 17°C (63°F) | 10°C (50°F) | 0" |
| 2021 | 12°C (54°F) | 8°C (47°F) | 0" |
| 2020 | 23°C (74°F) | 6°C (42°F) | 0.01" |
| 2019 | 16°C (61°F) | 5°C (41°F) | 0.01" |
| 2018 | 19°C (67°F) | 12°C (53°F) | 0.01" |
| 2017 | 18°C (65°F) | 9°C (49°F) | 0.03" |
| 2016 | 22°C (72°F) | 8°C (47°F) | 0" |
| 2015 | 19°C (67°F) | 13°C (55°F) | 0.1" |
| 2014 | 17°C (62°F) | 7°C (44°F) | 0" |
| 2013 | 15°C (59°F) | 8°C (47°F) | 0.2" |
| 2012 | 16°C (60°F) | 8°C (47°F) | 1.05" |
| 2011 | 13°C (55°F) | 9°C (49°F) | 1.37" |
| 2010 | 17°C (62°F) | 8°C (46°F) | 0.02" |
| 2009 | 21°C (69°F) | 8°C (47°F) | 0" |
| 2008 | 12°C (53°F) | 7°C (44°F) | 0" |
| 2007 | 13°C (56°F) | 2°C (36°F) | 0" |
| 2006 | 18°C (65°F) | 13°C (56°F) | 0" |
| 2005 | 14°C (58°F) | 9°C (48°F) | 0" |
| 2004 | 14°C (57°F) | 11°C (51°F) | 1.08" |
| 2003 | 22°C (71°F) | 13°C (55°F) | 0" |
| 2002 | 17°C (63°F) | 9°C (48°F) | 0" |
| 2001 | 19°C (66°F) | 14°C (58°F) | 0" |
| 2000 | 13°C (56°F) | 9°C (49°F) | 0" |
| 1999 | 16°C (60°F) | 11°C (52°F) | 0.56" |
| 1998 | 15°C (59°F) | 9°C (48°F) | 0" |
| 1997 | 14°C (58°F) | 5°C (41°F) | 0" |
| 1996 | 21°C (69°F) | 4°C (40°F) | 0" |
| 1995 | 15°C (59°F) | 4°C (40°F) | 0" |
| 1994 | 13°C (56°F) | 6°C (42°F) | 0" |
| 1993 | 13°C (55°F) | -1°C (30°F) | 0" |
| 1992 | 15°C (59°F) | 7°C (44°F) | 0" |
| 1991 | 12°C (54°F) | 11°C (51°F) | 0.81" |
| 1990 | 14°C (57°F) | 6°C (42°F) | 1.75" |
| 1989 | 15°C (59°F) | 7°C (44°F) | 0.69" |
| 1988 | 16°C (61°F) | 6°C (42°F) | 0" |
| 1987 | 12°C (53°F) | 8°C (46°F) | 1.26" |
| 1986 | 15°C (59°F) | 2°C (35°F) | 0" |
| 1985 | 16°C (61°F) | 2°C (36°F) | 0.01" |
| 1984 | 13°C (56°F) | 9°C (49°F) | 0" |
| 1983 | 14°C (58°F) | 9°C (48°F) | 0.54" |
| 1982 | 18°C (64°F) | 10°C (50°F) | 0" |
| 1981 | 14°C (58°F) | 9°C (48°F) | 0" |
| 1980 | 18°C (65°F) | 7°C (45°F) | 0" |
| 1979 | 18°C (64°F) | 11°C (51°F) | 0" |
| 1978 | 14°C (58°F) | 8°C (47°F) | 0" |
| 1977 | 18°C (65°F) | 6°C (43°F) | 0" |
| 1976 | 9°C (49°F) | 7°C (44°F) | 0.07" |
| 1975 | 16°C (60°F) | 9°C (49°F) | 0.36" |
| 1974 | 16°C (61°F) | 6°C (42°F) | 0" |
| 1973 | 14°C (58°F) | 5°C (41°F) | 0" |
| 1972 | 18°C (65°F) | 7°C (44°F) | 0" |
| 1971 | 15°C (59°F) | 11°C (51°F) | 0" |