Weather on September 20
Lowell, MA
55 Years of Data
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° | — | — |
Lowell, MA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Lowell, MA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Lowell, MA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Lowell, MA
Lowell, MA has no months that meet our "pleasant" threshold — every season has tradeoffs.