Grand Junction Rgnl climate by month
Averages and records for each calendar month at Grand Junction Rgnl, United States, from 1900 to 2026. The warmest month is July, averaging 34.0°C; the coolest is January at 2.7°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 2.7°C | −8.8°C | 16.7°C31 January 1911 | −30.6°C13 January 1963 | 127 / 127 |
| February | 7.2°C | −4.8°C | 21.7°C3 February 2025 | −29.4°C8 February 1933 | 127 / 127 |
| March | 13.1°C | −0.3°C | 31.1°C25 March 2026 | −15.0°C5 March 1939 | 127 / 127 |
| April | 18.5°C | 3.9°C | 31.7°C29 April 1992 | −11.7°C2 April 1975 | 127 / 127 |
| May | 24.3°C | 9.0°C | 38.3°C29 May 2000 | −4.4°C1 May 2011 | 127 / 127 |
| June | 30.8°C | 14.1°C | 40.6°C27 June 1990 | 1.1°C14 June 1976 | 127 / 127 |
| July | 34.0°C | 17.9°C | 41.7°C9 July 2021 | 6.7°C5 July 1993 | 127 / 127 |
| August | 32.1°C | 16.7°C | 40.6°C3 August 2026 | 6.1°C23 August 1968 | 127 / 127 |
| September | 27.2°C | 11.8°C | 38.9°C6 September 2022 | −2.2°C27 September 1908 | 126 / 127 |
| October | 19.6°C | 5.0°C | 31.7°C1 October 2024 | −14.3°C31 October 2019 | 125 / 126 |
| November | 10.8°C | −2.1°C | 24.4°C2 November 2008 | −20.0°C30 November 2004 | 126 / 126 |
| December | 3.9°C | −7.4°C | 18.9°C6 December 1901 | −29.4°C26 December 1924 | 126 / 126 |
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 125 to 127 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.