Weather on September 18 in Mendoza
Historical weather data for September 18 in Mendoza, Argentina
Avg High22°C (71°F)
Avg Low8°C (46°F)
Warmest202522°C
Coldest19983°C
Based on 56 years of data from MENDOZA OBSERVATORIO
About This Date
September 18th in Mendoza, Argentina typically brings pleasant fall weather, with average highs around 22°C and lows near 8°C — a 25°F daily swing. Over 56 years of records, the warmest September 18th was in 2025 (22°C average), while the coldest was 1998 (3°C) — a 34°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 6.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.6°F warmer on this date compared to 20-30 years ago.
Planning for September 18th in Mendoza? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2026 | 27°C (81°F) | 14°C (58°F) | -- |
| 2025 | 29°C (85°F) | 16°C (60°F) | -- |
| 2024 | -- | 11°C (52°F) | -- |
| 2023 | 19°C (67°F) | 7°C (45°F) | -- |
| 2022 | 25°C (77°F) | 7°C (45°F) | -- |
| 2021 | -- | 11°C (52°F) | -- |
| 2020 | -- | 12°C (53°F) | -- |
| 2019 | -- | 8°C (47°F) | -- |
| 2018 | -- | 13°C (55°F) | -- |
| 2017 | -- | 8°C (46°F) | -- |
| 2016 | 26°C (79°F) | 14°C (58°F) | -- |
| 2015 | 21°C (70°F) | 9°C (48°F) | -- |
| 2014 | 26°C (78°F) | 12°C (54°F) | -- |
| 2013 | -- | 0°C (32°F) | -- |
| 2012 | 17°C (63°F) | -- | -- |
| 2011 | -- | 4°C (40°F) | -- |
| 2010 | -- | 8°C (46°F) | -- |
| 2009 | 21°C (70°F) | 7°C (45°F) | -- |
| 2008 | 26°C (78°F) | -- | -- |
| 2007 | 16°C (61°F) | -- | -- |
| 2006 | -- | 9°C (48°F) | -- |
| 2005 | -- | 6°C (42°F) | -- |
| 2004 | 30°C (86°F) | 12°C (54°F) | -- |
| 2003 | 28°C (83°F) | 11°C (51°F) | 0 mm |
| 2002 | 21°C (70°F) | 6°C (43°F) | 0 mm |
| 2001 | 26°C (78°F) | 6°C (43°F) | -- |
| 2000 | 23°C (73°F) | 7°C (45°F) | -- |
| 1999 | 24°C (76°F) | 13°C (56°F) | -- |
| 1998 | 6°C (42°F) | 2°C (35°F) | -- |
| 1997 | 22°C (72°F) | 5°C (41°F) | 0 mm |
| 1996 | 21°C (69°F) | 7°C (45°F) | 0 mm |
| 1995 | 26°C (78°F) | 7°C (45°F) | -- |
| 1994 | 29°C (85°F) | 11°C (52°F) | 0 mm |
| 1993 | 23°C (73°F) | 6°C (43°F) | 0 mm |
| 1992 | 18°C (65°F) | 4°C (39°F) | -- |
| 1991 | 20°C (68°F) | 10°C (50°F) | 0 mm |
| 1990 | 11°C (51°F) | 4°C (39°F) | 0 mm |
| 1989 | 28°C (83°F) | 8°C (46°F) | -- |
| 1988 | 14°C (58°F) | 7°C (44°F) | 0 mm |
| 1987 | 19°C (66°F) | 6°C (43°F) | 0 mm |
| 1986 | 19°C (67°F) | 4°C (40°F) | -- |
| 1985 | 22°C (71°F) | 7°C (45°F) | 0 mm |
| 1984 | 24°C (76°F) | 9°C (48°F) | -- |
| 1983 | 13°C (56°F) | 2°C (36°F) | -- |
| 1982 | 21°C (70°F) | -- | -- |
| 1981 | 22°C (71°F) | 7°C (44°F) | 0 mm |
| 1980 | 16°C (60°F) | 7°C (44°F) | 0 mm |
| 1979 | 18°C (65°F) | 1°C (33°F) | 0 mm |
| 1978 | 21°C (69°F) | 6°C (43°F) | -- |
| 1977 | 24°C (75°F) | 7°C (44°F) | -- |
| 1976 | -- | 9°C (48°F) | -- |
| 1975 | 21°C (70°F) | 12°C (53°F) | -- |
| 1974 | 12°C (53°F) | 4°C (40°F) | 0 mm |
| 1973 | 18°C (64°F) | 3°C (37°F) | 0 mm |
| 1972 | 27°C (80°F) | 4°C (40°F) | -- |
| 1971 | 23°C (73°F) | 14°C (58°F) | -- |