October is close to Grand Junction's year-round average, with average highs near 17.3°C and lows around 2.8°C (mean 10.1°C). It is about average for rainfall, averaging 42 mm of rainfall and 49% relative humidity across the period.
October is close to Grand Junction's year-round average. Across 45 years of records, the warmest October in Grand Junction was 2024 — when the month averaged 14.7°C — while the coldest was 1984 at 6.1°C. Typical October days reach 17.3°C with nights near 2.8°C. The long-term trend is warming, about 0.5°C per decade.
October is about average for rainfall in Grand Junction, averaging 42 mm of rainfall. The wettest October on record was 2006 with 110 mm, while the driest was 1999 at 4 mm.
Relative humidity in Grand Junction during October averages 49%. The most humid October was 2006 at 64%, and the least humid was 1999 at 30%.
October receives about 4 kWh/m²/day of solar energy in Grand Junction. The sunniest October was 2019 at 4.6 kWh/m²/day, and the cloudiest were 2004, 2006 and 2018, among others at 3.4.
Average wind speed in Grand Junction during October is 2.1 m/s. The windiest Octobers were 2004, 2016 and 2019 at 2.5 m/s, while the calmest were 1987 and 1988 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.3°C | 9.7°C | 9.9°C | 10.2°C | 11.5°C | +2.2°C |
| Avg High | 16.4°C | 17.1°C | 17.1°C | 17.3°C | 19.0°C | +2.6°C |
| Avg Low | 2.2°C | 2.3°C | 2.7°C | 3.0°C | 4.1°C | +1.9°C |
| Avg Rain | 46 mm | 42 mm | 42 mm | 38 mm | 46 mm | +0 mm |
October temperatures in Grand Junction have risen by about 3.5°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -14.3°C (1991) to a record high of 30.2°C (2015).
Rainfall in October is about average for rainfall, averaging 42 mm, with a wettest year of 110 mm.
A good time to visit Grand Junction
October is a good time to visit Grand Junction, with days averaging 17.3°C and nights around 2.8°C (mean 10.1°C, close to Grand Junction's yearly average) and moderate rainfall. August and June are marginally more temperate, but October still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 18.9°C | 11.7°C | 4.5°C | 27.7°C | -5.2°C | 74 mm | 52% | 2.1 m/s | 4 |
| 2024 🔥 | 22.2°C | 14.7°C | 7.3°C | 29.0°C | -5.5°C | 38 mm | 40% | 2.1 m/s | 4.1 |
| 2023 | 19.1°C | 11.6°C | 4.1°C | 25.3°C | -7.9°C | 32 mm | 44% | 1.9 m/s | 4.2 |
| 2022 | 17.6°C | 10.5°C | 3.3°C | 22.5°C | -7.0°C | 61 mm | 53% | 1.8 m/s | 4.2 |
| 2021 | 16.1°C | 9.1°C | 2.1°C | 24.2°C | -4.9°C | 52 mm | 57% | 2.1 m/s | 3.8 |
| 2020 | 20.0°C | 11.7°C | 3.4°C | 27.3°C | -13.9°C | 17 mm | 32% | 2.1 m/s | 4.4 |
| 2019 | 15.2°C | 7.2°C | -0.9°C | 25.4°C | -13.0°C | 6 mm | 31% | 2.5 m/s | 4.6 |
| 2018 | 14.7°C | 8.6°C | 2.6°C | 23.0°C | -7.0°C | 94 mm | 64% | 1.9 m/s | 3.4 |
| 2017 | 17.3°C | 9.5°C | 1.7°C | 23.9°C | -2.9°C | 12 mm | 45% | 2.2 m/s | 4.4 |
| 2016 | 19.8°C | 12.4°C | 5.0°C | 23.6°C | -1.9°C | 16 mm | 49% | 2.5 m/s | 4.1 |
| 2015 | 19.5°C | 13.0°C | 6.5°C | 30.2°C | -2.0°C | 55 mm | 54% | 1.9 m/s | 3.9 |
| 2014 | 18.8°C | 11.8°C | 4.8°C | 23.7°C | 0.1°C | 19 mm | 51% | 1.8 m/s | 4.2 |
| 2013 | 14.6°C | 7.6°C | 0.6°C | 24.5°C | -4.7°C | 63 mm | 56% | 2.2 m/s | 4 |
| 2012 | 17.9°C | 10.4°C | 2.9°C | 25.9°C | -5.5°C | 16 mm | 42% | 2.1 m/s | 4.4 |
| 2011 | 17.1°C | 9.9°C | 2.7°C | 26.7°C | -7.2°C | 45 mm | 50% | 2.1 m/s | 4 |
| 2010 | 18.2°C | 11.2°C | 4.2°C | 28.5°C | -5.7°C | 51 mm | 52% | 2.1 m/s | 3.9 |
| 2009 | 14.1°C | 7.2°C | 0.2°C | 24.0°C | -9.2°C | 28 mm | 50% | 2.3 m/s | 3.7 |
| 2008 | 18.2°C | 10.5°C | 2.7°C | 27.3°C | -5.2°C | 19 mm | 41% | 2.2 m/s | 4.2 |
| 2007 | 17.3°C | 9.7°C | 2.1°C | 23.9°C | -5.0°C | 35 mm | 53% | 2.3 m/s | 4 |
| 2006 🌧️ | 14.7°C | 8.2°C | 1.6°C | 25.3°C | -5.5°C | 110 mm | 64% | 2 m/s | 3.4 |
| 2005 | 17.8°C | 10.7°C | 3.6°C | 25.1°C | -2.1°C | 52 mm | 55% | 2 m/s | 3.9 |
| 2004 | 16.0°C | 9.6°C | 3.2°C | 23.3°C | -4.1°C | 54 mm | 57% | 2.5 m/s | 3.4 |
| 2003 | 21.3°C | 13.3°C | 5.2°C | 28.0°C | -1.5°C | 11 mm | 38% | 2.2 m/s | 4.4 |
| 2002 | 15.5°C | 8.6°C | 1.7°C | 22.0°C | -4.2°C | 48 mm | 53% | 1.8 m/s | 4 |
| 2001 | 18.8°C | 11.1°C | 3.5°C | 27.2°C | -4.0°C | 21 mm | 40% | 2.1 m/s | 4.2 |
| 2000 | 17.1°C | 9.9°C | 2.8°C | 26.4°C | -2.5°C | 41 mm | 53% | 2.1 m/s | 3.9 |
| 1999 | 20.3°C | 11.6°C | 2.9°C | 26.1°C | -6.0°C | 4 mm | 30% | 2 m/s | 4.5 |
| 1998 | 16.4°C | 9.5°C | 2.7°C | 25.6°C | -3.0°C | 54 mm | 54% | 2.1 m/s | 3.8 |
| 1997 | 16.4°C | 8.8°C | 1.3°C | 26.1°C | -9.7°C | 56 mm | 53% | 2.3 m/s | 4.2 |
| 1996 | 15.7°C | 8.6°C | 1.5°C | 25.8°C | -7.9°C | 54 mm | 52% | 2.2 m/s | 3.9 |
| 1995 | 16.9°C | 9.0°C | 1.2°C | 24.3°C | -7.9°C | 15 mm | 43% | 2.1 m/s | 4.3 |
| 1994 | 15.6°C | 8.8°C | 1.9°C | 22.7°C | -3.6°C | 34 mm | 53% | 2.1 m/s | 4.1 |
| 1993 | 15.9°C | 9.1°C | 2.4°C | 27.1°C | -7.5°C | 63 mm | 52% | 1.8 m/s | 3.8 |
| 1992 | 18.9°C | 11.9°C | 4.9°C | 27.1°C | -2.3°C | 45 mm | 40% | 2 m/s | 4 |
| 1991 | 18.0°C | 10.4°C | 2.7°C | 26.2°C | -14.3°C | 49 mm | 41% | 2.1 m/s | 4.1 |
| 1990 | 17.0°C | 9.4°C | 1.7°C | 25.0°C | -4.5°C | 44 mm | 49% | 2.2 m/s | 4.3 |
| 1989 | 17.4°C | 10.0°C | 2.5°C | 25.1°C | -5.8°C | 26 mm | 42% | 2.2 m/s | 4.3 |
| 1988 | 20.5°C | 13.0°C | 5.5°C | 24.9°C | 1.5°C | 6 mm | 46% | 1.7 m/s | 4.1 |
| 1987 | 19.6°C | 12.0°C | 4.4°C | 27.2°C | -0.7°C | 39 mm | 44% | 1.7 m/s | 4.1 |
| 1986 | 15.5°C | 8.4°C | 1.4°C | 21.5°C | -5.9°C | 59 mm | 59% | 1.8 m/s | 3.8 |
| 1985 | 16.3°C | 9.0°C | 1.7°C | 22.4°C | -3.7°C | 71 mm | 57% | 2.1 m/s | 4.1 |
| 1984 ❄️ | 12.4°C | 6.1°C | -0.2°C | 21.6°C | -7.2°C | 75 mm | 61% | 2.1 m/s | 3.4 |
| 1983 | 17.5°C | 10.3°C | 3.1°C | 21.1°C | -1.1°C | 20 mm | 53% | 1.9 m/s | — |
| 1982 | 13.9°C | 6.7°C | -0.4°C | 21.7°C | -5.4°C | 40 mm | 53% | 2.2 m/s | — |
| 1981 | 14.4°C | 7.9°C | 1.4°C | 22.3°C | -6.3°C | 74 mm | 59% | 2.4 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 17.3°C with lows near 2.8°C (mean 10.1°C), based on 45 years of NASA POWER data.
October averages 42 mm of rainfall in Grand Junction, about average for rainfall. The wettest on record was 110 mm in 2006.
The hottest October reached 30.2°C in 2015. The coldest dipped to -14.3°C in 1991.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 3.5°C. Daytime highs moved from 14.9°C to 18.8°C and overnight lows from 1.1°C to 4.3°C over the same span.
October is close to Grand Junction's year-round average and about average for rainfall, so plan for around 17.3°C daytime highs and 2.8°C at night.
Not quite — October is the 7th coolest month in Grand Junction, averaging 10.1°C.
For October in Grand Junction, pack warm layers and a jacket for chilly mornings, with typical highs of 17.3°C and lows of 2.8°C.
Relative humidity in October averages 49% — relatively dry.
Average wind speed in October is 2.1 m/s. The windiest October on record averaged 2.5 m/s (2004).
The wettest October on record was 2006 with 110 mm. On average, October sees 42 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Grand Junction behaves each October, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for October specifically, along with year-by-year records and how the month has changed over the decades.
