Window Rock Arpt climate by month
Averages and records for each calendar month at Window Rock Arpt, United States, from 1998 to 2026. The warmest month is July, averaging 30.9°C; the coolest is January at 7.3°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 7.3°C | −10.3°C | 17.2°C15 January 2000 | −31.6°C1 January 2011 | 27 / 28 |
| February | 9.5°C | −7.8°C | 21.1°C17 February 2016 | −30.5°C3 February 2011 | 27 / 28 |
| March | 14.0°C | −4.8°C | 28.9°C19 March 2026 | −22.2°C3 March 2002 | 26 / 28 |
| April | 18.1°C | −1.9°C | 28.3°C29 April 2020 | −13.8°C2 April 2025 | 27 / 28 |
| May | 23.1°C | 2.1°C | 33.3°C31 May 2002 | −10.5°C2 May 2008 | 28 / 28 |
| June | 29.7°C | 7.3°C | 38.3°C15 June 2021 | −3.2°C9 June 2020 | 27 / 28 |
| July | 30.9°C | 12.1°C | 37.2°C17 July 2023 | 1.7°C2 July 2026 | 27 / 28 |
| August | 29.1°C | 11.1°C | 36.1°C14 August 2020 | 1.7°C25 August 2002 | 28 / 29 |
| September | 25.9°C | 6.0°C | 35.6°C6 September 2020 | −5.6°C29 September 1999 | 28 / 29 |
| October | 19.5°C | −0.5°C | 30.0°C1 October 2015 | −17.1°C31 October 2019 | 28 / 28 |
| November | 13.4°C | −6.4°C | 27.2°C28 November 2000 | −20.6°C30 November 2004 | 27 / 27 |
| December | 7.8°C | −9.9°C | 18.9°C1 December 2003 | −27.1°C31 December 2010 | 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 26 to 28 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.