Lowell climate by month
Averages and records for each calendar month at Lowell, United States, from 1997 to 2026. The warmest month is July, averaging 33.6°C; the coolest is December at 3.3°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 3.9°C | −1.4°C | 13.9°C14 January 2010 | −13.8°C1 January 2022 | 28 / 29 |
| February | 6.6°C | −1.1°C | 20.6°C15 February 2010 | −14.3°C18 February 2006 | 26 / 29 |
| March | 11.9°C | 0.9°C | 25.0°C9 March 2005 | −11.0°C3 March 2019 | 26 / 29 |
| April | 17.1°C | 3.1°C | 33.3°C20 April 2016 | −3.2°C17 April 2013 | 28 / 29 |
| May | 22.3°C | 6.7°C | 35.6°C31 May 2015 | −1.7°C8 May 1999 | 27 / 29 |
| June | 26.4°C | 10.2°C | 43.3°C28 June 2015 | 2.8°C10 June 1999 | 29 / 29 |
| July | 33.6°C | 13.1°C | 42.2°C24 July 2006 | 6.1°C3 July 1999 | 28 / 30 |
| August | 32.8°C | 12.5°C | 43.3°C1 August 2015 | 5.6°C29 August 2000 | 30 / 30 |
| September | 25.6°C | 9.0°C | 37.8°C13 September 2013 | −1.1°C23 September 2000 | 28 / 30 |
| October | 16.1°C | 4.7°C | 28.3°C1 October 2003 | −8.8°C30 October 2019 | 28 / 29 |
| November | 7.9°C | 1.0°C | 20.6°C5 November 2012 | −13.2°C24 November 2010 | 28 / 29 |
| December | 3.3°C | −1.8°C | 13.3°C2 December 2021 | −16.0°C22 December 2022 | 28 / 29 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 26 to 30 years each.
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Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.