Weather on September 18
Lowell, MA
55 Years of Data
Avg High
73°F
Avg Low
50°F
Warmest
1992
75°F avg
Coldest
1986
50°F avg
About This Date
September 18th in Lowell, MA typically brings pleasant fall weather, with average highs around 73°F and lows near 50°F. Over 55 years of records, the warmest September 18th was in 1992 (75°F average), while the coldest was 1986 (50°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 33% of September 18th dates historically, with the wettest September 18th recording 3.91" of rain. The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
Planning for September 18th in Lowell, MA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 76° | 49° | 62° | — | — |
| 2024 | 85° | 53° | 69° | — | — |
| 2023 | 80° | 53° | 67° | 0.05" | — |
| 2022 | 72° | 45° | 58° | — | — |
| 2021 | 68° | 60° | 64° | — | — |
| 2020 | 78° | 52° | 65° | — | — |
| 2019 | 71° | 47° | 59° | — | — |
| 2018 | 85° | 66° | 75° | 1.8" | — |
| 2017 | 84° | 62° | 73° | 0.03" | — |
| 2016 | — | 45° | — | — | — |
| 2015 | 89° | 55° | 72° | — | — |
| 2014 | 73° | 42° | 58° | — | — |
| 2013 | 64° | 38° | 51° | — | — |
| 2012 | 77° | 42° | 60° | — | — |
| 2011 | 66° | 39° | 53° | — | — |
| 2010 | 60° | 57° | 59° | 0.1" | — |
| 2009 | 63° | 44° | 53° | — | — |
| 2008 | 74° | 49° | 61° | — | — |
| 2007 | 67° | 38° | 52° | — | — |
| 2006 | 82° | 54° | 68° | — | — |
| 2005 | 70° | 59° | 64° | — | — |
| 2004 | 81° | 60° | 70° | 2.87" | — |
| 2003 | 78° | 52° | 65° | — | — |
| 2002 | 78° | 52° | 65° | — | — |
| 2001 | 79° | 46° | 62° | — | — |
| 2000 | 70° | 46° | 58° | — | — |
| 1999 | 59° | 53° | 56° | 0.2" | — |
| 1998 | 80° | 46° | 63° | — | — |
| 1997 | 76° | 47° | 61° | 0.13" | — |
| 1996 | 57° | 52° | 54° | 2.79" | — |
| 1995 | 62° | 52° | 57° | 3.91" | — |
| 1994 | 84° | 56° | 70° | 2.54" | — |
| 1993 | 58° | 53° | 55° | 0.08" | — |
| 1992warmest | 87° | 62° | 75° | — | — |
| 1991 | 88° | 57° | 72° | — | — |
| 1990 | 69° | 37° | 53° | — | — |
| 1989 | 71° | 52° | 61° | 0.03" | — |
| 1988 | 75° | 56° | 65° | — | — |
| 1987 | 76° | 55° | 65° | 0.25" | — |
| 1986coldest | 65° | 35° | 50° | — | — |
| 1985 | 75° | 48° | 62° | — | — |
| 1984 | 72° | 36° | 54° | — | — |
| 1983 | 74° | 51° | 62° | — | — |
| 1982 | 75° | 40° | 57° | — | — |
| 1981 | 65° | 55° | 60° | — | — |
| 1980 | 72° | 47° | 59° | 1.22" | — |
| 1979 | 80° | 40° | 60° | — | — |
| 1978 | 61° | 52° | 56° | 0.05" | — |
| 1977 | 63° | 51° | 57° | 0.3" | — |
| 1976 | 65° | 57° | 61° | 0.69" | — |
| 1975 | 66° | 43° | 54° | — | — |
| 1974 | 72° | 41° | 56° | 0.2" | — |
| 1973 | 65° | 39° | 52° | — | — |
| 1972 | 84° | 58° | 71° | — | — |
| 1971 | 66° | 61° | 63° | — | — |
55 years of data from LOWELL