January is one of the cooler months of the year in Grand Junction, with average highs near 2.8°C and lows around -8.2°C (mean -2.7°C). It is about average for rainfall, averaging 30 mm of rainfall and 72% relative humidity across the period.
January is one of the cooler months of the year in Grand Junction. Across 45 years of records, the warmest January in Grand Junction was 2003 — when the month averaged 2°C — while the coldest was 1988 at -7.9°C. Typical January days reach 2.8°C with nights near -8.2°C. The long-term trend is warming, about 0.3°C per decade.
January is about average for rainfall in Grand Junction, averaging 30 mm of rainfall. The wettest January on record was 1993 with 85 mm, while the driest was 2022 at 6 mm.
Relative humidity in Grand Junction during January averages 72%. The most humid January was 1993 at 87%, and the least humid was 2018 at 56%.
January receives about 2.6 kWh/m²/day of solar energy in Grand Junction. The sunniest January was 2022 at 3 kWh/m²/day, and the cloudiest were 2017 and 2023 at 2.2.
Average wind speed in Grand Junction during January is 1.9 m/s. The windiest Januarys were 1982 and 2017 at 2.6 m/s, while the calmest were 1984 and 2015 at 1.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -3.6°C | -2.9°C | -1.9°C | -2.4°C | -2.5°C | +1.1°C |
| Avg High | 2.1°C | 2.6°C | 3.5°C | 3.0°C | 2.8°C | +0.7°C |
| Avg Low | -9.4°C | -8.4°C | -7.3°C | -7.8°C | -7.9°C | +1.5°C |
| Avg Rain | 23 mm | 39 mm | 31 mm | 30 mm | 23 mm | -1 mm |
January temperatures in Grand Junction have risen by about 0.4°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -27°C (1982) to a record high of 14°C (2015).
Rainfall in January is about average for rainfall, averaging 30 mm, with a wettest year of 85 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
A quieter season to visit Grand Junction
If your dates are flexible, the more temperate months of August and June tend to be the most comfortable for visiting Grand Junction. That said, January — with days averaging 2.8°C and nights around -8.2°C (mean -2.7°C) and moderate rainfall (30 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 2.4°C | -3.1°C | -8.6°C | 10.6°C | -17.4°C | 7 mm | 61% | 1.8 m/s | 2.8 |
| 2024 | 4.1°C | -1.0°C | -6.2°C | 12.5°C | -14.1°C | 20 mm | 70% | 2.1 m/s | 2.3 |
| 2023 | 0.5°C | -4.6°C | -9.6°C | 6.4°C | -17.3°C | 57 mm | 85% | 2 m/s | 2.2 |
| 2022 | 3.5°C | -2.3°C | -8.1°C | 8.1°C | -22.3°C | 6 mm | 70% | 1.6 m/s | 3 |
| 2021 | 3.3°C | -2.0°C | -7.4°C | 7.8°C | -15.3°C | 24 mm | 68% | 1.8 m/s | 2.7 |
| 2020 | 3.1°C | -2.3°C | -7.6°C | 9.3°C | -12.5°C | 21 mm | 72% | 1.8 m/s | 2.3 |
| 2019 | 2.7°C | -2.6°C | -7.9°C | 6.3°C | -16.9°C | 42 mm | 77% | 2 m/s | 2.5 |
| 2018 | 6.2°C | 0.8°C | -4.6°C | 12.1°C | -8.7°C | 23 mm | 56% | 1.8 m/s | 2.6 |
| 2017 | 1.3°C | -3.5°C | -8.4°C | 6.3°C | -21.7°C | 64 mm | 82% | 2.6 m/s | 2.2 |
| 2016 | 0.9°C | -4.7°C | -10.3°C | 8.3°C | -23.9°C | 31 mm | 82% | 1.7 m/s | 2.4 |
| 2015 | 5.3°C | 0.2°C | -5.0°C | 14.0°C | -14.5°C | 21 mm | 72% | 1.4 m/s | 2.6 |
| 2014 | 4.0°C | -1.2°C | -6.4°C | 7.3°C | -13.9°C | 21 mm | 62% | 1.7 m/s | 2.7 |
| 2013 | 0.5°C | -5.3°C | -11.1°C | 8.1°C | -20.3°C | 30 mm | 73% | 1.6 m/s | 2.7 |
| 2012 | 4.8°C | -0.8°C | -6.4°C | 10.2°C | -11.7°C | 25 mm | 58% | 2.1 m/s | 2.7 |
| 2011 | 2.0°C | -3.6°C | -9.2°C | 8.7°C | -22.9°C | 13 mm | 74% | 1.7 m/s | 2.6 |
| 2010 | 2.7°C | -3.0°C | -8.6°C | 8.0°C | -17.3°C | 34 mm | 74% | 1.8 m/s | 2.4 |
| 2009 | 4.4°C | -1.4°C | -7.2°C | 10.2°C | -16.7°C | 22 mm | 68% | 2.1 m/s | 2.7 |
| 2008 | -0.9°C | -7.1°C | -13.3°C | 4.4°C | -24.3°C | 44 mm | 83% | 2.5 m/s | 2.5 |
| 2007 | 1.8°C | -3.7°C | -9.2°C | 7.9°C | -18.4°C | 19 mm | 70% | 1.9 m/s | 2.9 |
| 2006 | 4.1°C | -1.2°C | -6.5°C | 9.6°C | -11.8°C | 26 mm | 64% | 2.2 m/s | 2.6 |
| 2005 | 5.2°C | 0.5°C | -4.2°C | 11.9°C | -13.2°C | 77 mm | 80% | 2.1 m/s | 2.4 |
| 2004 | 2.6°C | -2.9°C | -8.4°C | 7.7°C | -20.8°C | 32 mm | 71% | 1.8 m/s | 2.6 |
| 2003 🔥 | 7.0°C | 2.0°C | -3.1°C | 12.8°C | -9.3°C | 9 mm | 66% | 1.5 m/s | 2.6 |
| 2002 | 2.9°C | -2.5°C | -8.0°C | 9.7°C | -16.8°C | 13 mm | 61% | 2.1 m/s | 2.7 |
| 2001 | 3.5°C | -2.0°C | -7.4°C | 8.4°C | -13.6°C | 25 mm | 66% | 1.7 m/s | 2.7 |
| 2000 | 4.2°C | -0.9°C | -5.9°C | 12.0°C | -14.3°C | 47 mm | 69% | 1.9 m/s | 2.3 |
| 1999 | 4.5°C | -0.5°C | -5.5°C | 9.7°C | -13.3°C | 21 mm | 68% | 2.1 m/s | 2.5 |
| 1998 | 4.3°C | -0.6°C | -5.5°C | 9.1°C | -11.3°C | 22 mm | 73% | 2 m/s | 2.6 |
| 1997 | 1.4°C | -4.2°C | -9.7°C | 10.2°C | -17.5°C | 63 mm | 84% | 2.1 m/s | 2.4 |
| 1996 | 2.0°C | -3.6°C | -9.2°C | 9.8°C | -19.6°C | 45 mm | 70% | 2.4 m/s | 2.3 |
| 1995 | 3.2°C | -1.9°C | -7.1°C | 7.8°C | -12.8°C | 44 mm | 77% | 1.9 m/s | 2.6 |
| 1994 | 3.9°C | -1.6°C | -7.1°C | 10.5°C | -17.9°C | 18 mm | 66% | 1.7 m/s | 2.7 |
| 1993 🌧️ | 0.9°C | -4.6°C | -10.2°C | 7.7°C | -23.3°C | 85 mm | 87% | 1.9 m/s | 2.7 |
| 1992 | 1.9°C | -4.1°C | -10.1°C | 9.4°C | -17.7°C | 34 mm | 76% | 1.5 m/s | 2.9 |
| 1991 | 0.1°C | -6.1°C | -12.4°C | 5.8°C | -18.3°C | 33 mm | 80% | 1.7 m/s | 2.7 |
| 1990 | 3.8°C | -1.9°C | -7.5°C | 10.8°C | -12.5°C | 22 mm | 64% | 2.3 m/s | 2.5 |
| 1989 | -0.2°C | -7.1°C | -14.0°C | 8.3°C | -25.2°C | 34 mm | 82% | 1.9 m/s | 2.6 |
| 1988 ❄️ | -1.6°C | -7.9°C | -14.1°C | 4.1°C | -24.6°C | 44 mm | 86% | 1.9 m/s | 2.3 |
| 1987 | 2.4°C | -3.2°C | -8.8°C | 8.5°C | -16.9°C | 32 mm | 72% | 2.1 m/s | 2.5 |
| 1986 | 6.0°C | 0.5°C | -5.0°C | 11.9°C | -12.0°C | 9 mm | 70% | 1.7 m/s | 2.4 |
| 1985 | 1.5°C | -3.7°C | -8.9°C | 6.7°C | -20.4°C | 21 mm | 75% | 1.6 m/s | 2.6 |
| 1984 | 0.1°C | -5.7°C | -11.6°C | 6.6°C | -21.7°C | 12 mm | 79% | 1.4 m/s | 2.6 |
| 1983 | 4.2°C | -1.2°C | -6.5°C | 7.5°C | -12.4°C | 14 mm | 74% | 1.6 m/s | — |
| 1982 | 0.4°C | -5.7°C | -11.8°C | 10.3°C | -27.0°C | 33 mm | 80% | 2.6 m/s | — |
| 1981 | 6.4°C | 1.3°C | -3.8°C | 11.6°C | -8.5°C | 12 mm | 57% | 1.6 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 2.8°C with lows near -8.2°C (mean -2.7°C), based on 45 years of NASA POWER data.
January averages 30 mm of rainfall in Grand Junction, about average for rainfall. The wettest on record was 85 mm in 1993.
The hottest January reached 14°C in 2015. The coldest dipped to -27°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 0.4°C. Daytime highs moved from 2.5°C to 2.8°C and overnight lows from -8.5°C to -8°C over the same span.
January is one of the cooler months of the year in Grand Junction and about average for rainfall, so plan for around 2.8°C daytime highs and -8.2°C at night.
Yes — January is the coldest month of the year in Grand Junction, averaging -2.7°C.
For January in Grand Junction, pack warm layers and a jacket for chilly mornings, with typical highs of 2.8°C and lows of -8.2°C.
Relative humidity in January averages 72% — moderately humid.
Average wind speed in January is 1.9 m/s. The windiest January on record averaged 2.6 m/s (1982).
The wettest January on record was 1993 with 85 mm. On average, January sees 30 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 January, 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 January specifically, along with year-by-year records and how the month has changed over the decades.
