Defiance Mem Arpt climate by month
Averages and records for each calendar month at Defiance Mem Arpt, United States, from 1998 to 2026. The warmest month is July, averaging 29.3°C; the coolest is January at 0.7°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 0.7°C | −7.2°C | 18.3°C7 January 2008 | −28.2°C16 January 2009 | 29 / 29 |
| February | 2.8°C | −6.3°C | 22.8°C25 February 2000 | −27.7°C12 February 2014 | 29 / 29 |
| March | 9.3°C | −1.3°C | 30.0°C21 March 2012 | −19.9°C4 March 2014 | 29 / 29 |
| April | 16.4°C | 4.1°C | 30.6°C18 April 2004 | −8.2°C8 April 2018 | 29 / 29 |
| May | 22.4°C | 10.2°C | 35.6°C27 May 2012 | −3.9°C4 May 2005 | 29 / 29 |
| June | 27.4°C | 15.3°C | 41.7°C28 June 2012 | 2.2°C6 June 1998 | 29 / 29 |
| July | 29.3°C | 17.3°C | 41.1°C6 July 2012 | 7.2°C2 July 2001 | 29 / 29 |
| August | 28.0°C | 16.1°C | 35.6°C3 August 2012 | 6.7°C31 August 2009 | 29 / 29 |
| September | 25.1°C | 12.0°C | 36.7°C10 September 2013 | 0.6°C24 September 2012 | 27 / 29 |
| October | 17.8°C | 6.1°C | 31.7°C8 October 2007 | −4.9°C30 October 2008 | 28 / 28 |
| November | 10.4°C | 0.7°C | 27.2°C1 November 2016 | −13.8°C13 November 2019 | 27 / 28 |
| December | 3.7°C | −4.1°C | 20.6°C6 December 1998 | −23.9°C24 December 2004 | 28 / 28 |
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 27 to 29 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.