Weather on September 20
Lowell, MA
55 Years of Data
Avg High
73°F
Avg Low
48°F
Warmest
1983
77°F avg
Coldest
2014
47°F avg
About This Date
September 20th in Lowell, MA typically brings pleasant fall weather, with average highs around 73°F and lows near 48°F — a 25°F daily swing. Over 55 years of records, the warmest September 20th was in 1983 (77°F average), while the coldest was 2014 (47°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 27% of September 20th dates historically, with the wettest September 20th recording 3.45" of rain. The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
Planning for September 20th in Lowell, MA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 80° | 45° | 62° | — | — |
| 2024 | 77° | 56° | 66° | — | — |
| 2023 | 75° | 55° | 65° | — | — |
| 2022 | 65° | 57° | 61° | 2.87" | — |
| 2021 | 75° | 51° | 63° | — | — |
| 2020 | 63° | 39° | 51° | — | — |
| 2019 | 70° | 41° | 55° | — | — |
| 2018 | 65° | 58° | 61° | — | — |
| 2017 | 66° | 61° | 63° | 0.1" | — |
| 2016 | 80° | 63° | 71° | — | — |
| 2015 | 82° | 58° | 70° | — | — |
| 2014coldest | 60° | 34° | 47° | — | — |
| 2013 | 78° | 44° | 61° | — | — |
| 2012 | 70° | 42° | 56° | — | — |
| 2011 | 68° | 42° | 55° | — | — |
| 2010 | 77° | 48° | 63° | — | — |
| 2009 | 66° | 39° | 53° | — | — |
| 2008 | 62° | 40° | 51° | — | — |
| 2007 | 75° | 41° | 58° | — | — |
| 2006 | 84° | 54° | 69° | 1.32" | — |
| 2005 | 83° | 53° | 68° | — | — |
| 2004 | 61° | 43° | 52° | — | — |
| 2003 | 71° | 63° | 67° | 1.6" | — |
| 2002 | 81° | 51° | 66° | — | — |
| 2001 | 73° | 57° | 65° | — | — |
| 2000 | 79° | 55° | 67° | 1.37" | — |
| 1999 | 75° | 42° | 59° | — | — |
| 1998 | 80° | 55° | 68° | — | — |
| 1997 | 83° | 51° | 67° | — | — |
| 1996 | 71° | 46° | 59° | — | — |
| 1995 | 70° | 42° | 56° | — | — |
| 1994 | 69° | 42° | 56° | — | — |
| 1993 | 65° | 31° | 48° | — | — |
| 1992 | 86° | 43° | 64° | — | — |
| 1991 | 82° | 50° | 66° | 3.45" | — |
| 1990 | 68° | 37° | 53° | 0.74" | — |
| 1989 | 60° | 57° | 59° | 1.91" | — |
| 1988 | 80° | 54° | 67° | — | — |
| 1987 | 56° | 53° | 54° | 1.78" | — |
| 1986 | 67° | 51° | 59° | 0.28" | — |
| 1985 | 86° | 57° | 72° | — | — |
| 1984 | 81° | 45° | 63° | — | — |
| 1983warmest | 92° | 63° | 77° | — | — |
| 1982 | 61° | 40° | 50° | 1.19" | — |
| 1981 | 69° | 48° | 59° | 0.03" | — |
| 1980 | 75° | 47° | 61° | — | — |
| 1979 | 71° | 26° | 49° | — | — |
| 1978 | 75° | 39° | 57° | — | — |
| 1977 | 78° | 47° | 62° | 0.03" | — |
| 1976 | 76° | 53° | 64° | — | — |
| 1975 | 65° | 56° | 60° | 0.46" | — |
| 1974 | 72° | 54° | 63° | — | — |
| 1973 | 67° | 39° | 53° | — | — |
| 1972 | 62° | 46° | 54° | 1.91" | — |
| 1971 | 76° | 53° | 64° | — | — |
55 years of data from LOWELL