Weather on September 15
Lowell, MA
55 Years of Data
Avg High
75°F
Avg Low
51°F
Warmest
2005
78°F avg
Coldest
1975
47°F avg
About This Date
September 15th in Lowell, MA typically brings pleasant fall weather, with average highs around 75°F and lows near 51°F. Over 55 years of records, the warmest September 15th was in 2005 (78°F average), while the coldest was 1975 (47°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 35% of September 15th dates historically, with the wettest September 15th recording 4.06" of rain. The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
Planning for September 15th in Lowell, MA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
1.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 80° | 49° | 64° | — | — |
| 2024 | 86° | 59° | 73° | — | — |
| 2023 | 77° | 55° | 66° | — | — |
| 2022 | 81° | 58° | 69° | — | — |
| 2021 | 77° | 55° | 66° | — | — |
| 2020 | 75° | 44° | 60° | — | — |
| 2019 | 69° | 43° | 56° | 0.46" | — |
| 2018 | 80° | 61° | 70° | — | — |
| 2017 | 81° | 61° | 71° | 0.46" | — |
| 2016 | 88° | 51° | 69° | — | — |
| 2015 | 71° | 52° | 61° | — | — |
| 2014 | 65° | 37° | 51° | — | — |
| 2013 | 67° | 46° | 56° | — | — |
| 2012 | 84° | 55° | 70° | — | — |
| 2011 | 85° | 65° | 75° | — | — |
| 2010 | 75° | 47° | 61° | — | — |
| 2009 | 81° | 52° | 66° | — | — |
| 2008 | 76° | 66° | 71° | 1.73" | — |
| 2007 | 78° | 47° | 62° | 0.43" | — |
| 2006 | 68° | 54° | 61° | 0.56" | — |
| 2005warmest | 89° | 66° | 78° | — | — |
| 2004 | 77° | 48° | 63° | — | — |
| 2003 | 83° | 65° | 74° | — | — |
| 2002 | 86° | 54° | 70° | — | — |
| 2001 | 54° | 41° | 47° | 0.81" | — |
| 2000 | 79° | 52° | 65° | 0.41" | — |
| 1999 | 75° | 55° | 65° | — | — |
| 1998 | 72° | 58° | 65° | — | — |
| 1997 | 79° | 55° | 67° | — | — |
| 1996 | 65° | 50° | 57° | 0.13" | — |
| 1995 | 86° | 47° | 66° | 0.53" | — |
| 1994 | 72° | 48° | 60° | — | — |
| 1993 | 86° | 64° | 75° | — | — |
| 1992 | 78° | 44° | 61° | — | — |
| 1991 | 60° | 53° | 57° | 0.25" | — |
| 1990 | 76° | 65° | 70° | — | — |
| 1989 | 76° | 55° | 65° | 4.06" | — |
| 1988 | 73° | 42° | 58° | — | — |
| 1987 | 80° | 48° | 64° | — | — |
| 1986 | 65° | 38° | 51° | — | — |
| 1985 | 70° | 39° | 54° | — | — |
| 1984 | 63° | 47° | 55° | 1.65" | — |
| 1983 | 70° | 38° | 54° | — | — |
| 1982 | 82° | 59° | 71° | — | — |
| 1981 | 70° | 60° | 65° | 1.22" | — |
| 1980 | 67° | 51° | 59° | 0.03" | — |
| 1979 | 81° | 57° | 69° | 0.41" | — |
| 1978 | 64° | 41° | 53° | — | — |
| 1977 | 75° | 43° | 59° | 0.36" | — |
| 1976 | 80° | 57° | 69° | — | — |
| 1975coldest | 62° | 32° | 47° | — | — |
| 1974 | 70° | 47° | 58° | — | — |
| 1973 | 64° | 46° | 55° | 0.43" | — |
| 1972 | 76° | 47° | 61° | 0.86" | — |
| 1971 | 67° | 62° | 64° | 0.3" | — |
55 years of data from LOWELL