Hillsboro Muni climate by month
Averages and records for each calendar month at Hillsboro Muni, United States, from 2011 to 2026. The warmest month is August, averaging 36.2°C; the coolest is January at 14.8°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 14.8°C | 2.2°C | 28.3°C2 January 2026 | −13.2°C17 January 2018 | 14 / 15 |
| February | 16.9°C | 4.8°C | 31.7°C26 February 2024 | −18.2°C16 February 2021 | 15 / 15 |
| March | 21.8°C | 9.5°C | 32.8°C27 March 2022 | −8.2°C3 March 2014 | 15 / 15 |
| April | 24.6°C | 13.0°C | 33.3°C27 April 2014 | −0.5°C15 April 2014 | 15 / 15 |
| May | 28.7°C | 17.6°C | 35.6°C29 May 2018 | 1.1°C3 May 2013 | 15 / 15 |
| June | 33.5°C | 22.1°C | 40.0°C26 June 2012 | 13.3°C10 June 2020 | 14 / 15 |
| July | 35.4°C | 23.5°C | 43.3°C17 July 2023 | 15.6°C2 July 2013 | 15 / 15 |
| August | 36.2°C | 23.8°C | 44.4°C17 August 2023 | 17.2°C20 August 2012 | 15 / 15 |
| September | 32.8°C | 20.6°C | 43.3°C7 September 2023 | 6.1°C29 September 2020 | 13 / 15 |
| October | 27.3°C | 14.3°C | 37.2°C13 October 2024 | −2.1°C28 October 2017 | 14 / 14 |
| November | 20.4°C | 8.4°C | 34.4°C2 November 2017 | −5.5°C17 November 2014 | 14 / 15 |
| December | 16.5°C | 4.7°C | 28.9°C26 December 2025 | −11.0°C22 December 2022 | 15 / 15 |
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 13 to 15 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.