January is one of the cooler months of the year in Jackson, with average highs near 7.7°C and lows around -2.1°C (mean 2.8°C). It is about average for rainfall, averaging 105 mm of rainfall and 85% relative humidity across the period.
January is one of the cooler months of the year in Jackson. Across 45 years of records, the warmest January in Jackson was 2006 — when the month averaged 7.1°C — while the coldest was 1985 at -2.6°C. Typical January days reach 7.7°C with nights near -2.1°C. The long-term trend is warming, about 0.4°C per decade.
January is about average for rainfall in Jackson, averaging 105 mm of rainfall. The wettest January on record was 1999 with 243 mm, while the driest was 1986 at 16 mm.
Relative humidity in Jackson during January averages 85%. The most humid January was 1991 at 91%, and the least humid was 2014 at 77%.
January receives about 2.3 kWh/m²/day of solar energy in Jackson. The sunniest Januarys were 1986, 2014 and 2025 at 2.8 kWh/m²/day, and the cloudiest were 1999 and 2020 at 1.9.
Average wind speed in Jackson during January is 2 m/s. The windiest January was 1982 at 2.5 m/s, while the calmest were 1998, 2001 and 2011, among others at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 1.0°C | 3.5°C | 3.4°C | 2.8°C | 3.4°C | +2.4°C |
| Avg High | 5.9°C | 8.2°C | 8.3°C | 7.8°C | 8.5°C | +2.6°C |
| Avg Low | -3.8°C | -1.3°C | -1.4°C | -2.2°C | -1.7°C | +2.1°C |
| Avg Rain | 86 mm | 120 mm | 100 mm | 94 mm | 135 mm | +49 mm |
January temperatures in Jackson have risen by about 3.1°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -22.2°C (1985) to a record high of 24.1°C (2022).
Rainfall in January is about average for rainfall, averaging 105 mm, with a wettest year of 243 mm.
A quieter season to visit Jackson
If your dates are flexible, the more temperate months of September and June tend to be the most comfortable for visiting Jackson. That said, January — with days averaging 7.7°C and nights around -2.1°C (mean 2.8°C) and higher rainfall (105 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 | 6.4°C | 1.4°C | -3.6°C | 18.0°C | -13.1°C | 77 mm | 81% | 1.9 m/s | 2.8 |
| 2024 | 6.0°C | 0.7°C | -4.6°C | 17.6°C | -20.4°C | 167 mm | 84% | 2 m/s | 2.1 |
| 2023 | 11.8°C | 6.8°C | 1.8°C | 21.0°C | -5.1°C | 164 mm | 87% | 2 m/s | 2.2 |
| 2022 | 6.8°C | 1.2°C | -4.5°C | 24.1°C | -11.8°C | 141 mm | 83% | 2.2 m/s | 2.7 |
| 2021 | 9.2°C | 4.2°C | -0.8°C | 21.8°C | -5.4°C | 72 mm | 85% | 2 m/s | 2.3 |
| 2020 | 10.7°C | 6.0°C | 1.3°C | 20.9°C | -6.3°C | 187 mm | 90% | 1.9 m/s | 1.9 |
| 2019 | 8.4°C | 3.7°C | -1.0°C | 17.6°C | -10.1°C | 121 mm | 88% | 2 m/s | 2.3 |
| 2018 | 5.9°C | 0.6°C | -4.7°C | 20.0°C | -14.6°C | 98 mm | 82% | 2.1 m/s | 2.7 |
| 2017 | 11.8°C | 7.0°C | 2.1°C | 21.5°C | -12.1°C | 86 mm | 85% | 2.1 m/s | 2.1 |
| 2016 | 6.9°C | 2.2°C | -2.5°C | 18.9°C | -8.9°C | 55 mm | 86% | 2 m/s | 2.6 |
| 2015 | 7.8°C | 2.6°C | -2.5°C | 16.9°C | -15.7°C | 38 mm | 81% | 1.9 m/s | 2.5 |
| 2014 | 4.9°C | -0.5°C | -5.9°C | 14.8°C | -14.7°C | 60 mm | 77% | 2.3 m/s | 2.8 |
| 2013 | 9.8°C | 4.7°C | -0.5°C | 22.5°C | -5.6°C | 214 mm | 86% | 2.1 m/s | 2.3 |
| 2012 | 11.5°C | 5.9°C | 0.2°C | 18.3°C | -6.2°C | 88 mm | 86% | 2.2 m/s | 2.5 |
| 2011 | 6.2°C | 1.5°C | -3.2°C | 16.8°C | -11.0°C | 62 mm | 83% | 1.7 m/s | 2.3 |
| 2010 | 4.5°C | 0.3°C | -4.0°C | 17.8°C | -12.4°C | 119 mm | 86% | 2 m/s | 2.5 |
| 2009 | 6.7°C | 1.7°C | -3.4°C | 19.3°C | -14.6°C | 91 mm | 84% | 2 m/s | 2.4 |
| 2008 | 6.8°C | 1.9°C | -3.1°C | 19.7°C | -11.5°C | 108 mm | 83% | 2.1 m/s | 2.4 |
| 2007 | 8.7°C | 4.1°C | -0.4°C | 18.4°C | -8.4°C | 114 mm | 86% | 1.9 m/s | 2.2 |
| 2006 🔥 | 12.7°C | 7.1°C | 1.4°C | 19.8°C | -4.1°C | 191 mm | 81% | 2.4 m/s | 2.5 |
| 2005 | 9.3°C | 5.2°C | 1.1°C | 19.6°C | -9.8°C | 114 mm | 90% | 2.1 m/s | 2.2 |
| 2004 | 8.3°C | 3.3°C | -1.7°C | 21.8°C | -7.5°C | 79 mm | 82% | 2.1 m/s | 2.6 |
| 2003 | 4.7°C | 0.1°C | -4.5°C | 15.3°C | -14.8°C | 35 mm | 86% | 2 m/s | 2.5 |
| 2002 | 9.8°C | 5.0°C | 0.3°C | 22.5°C | -9.0°C | 140 mm | 88% | 1.9 m/s | 2.5 |
| 2001 | 6.4°C | 1.7°C | -2.9°C | 18.2°C | -11.0°C | 76 mm | 85% | 1.7 m/s | 2.4 |
| 2000 | 9.1°C | 3.9°C | -1.3°C | 21.2°C | -7.6°C | 53 mm | 81% | 2 m/s | 2.3 |
| 1999 🌧️ | 9.9°C | 5.1°C | 0.3°C | 20.1°C | -13.9°C | 243 mm | 88% | 2.4 m/s | 1.9 |
| 1998 | 10.5°C | 5.8°C | 1.2°C | 19.7°C | -4.7°C | 140 mm | 90% | 1.7 m/s | 2.1 |
| 1997 | 6.3°C | 1.5°C | -3.3°C | 20.5°C | -15.8°C | 114 mm | 89% | 2.3 m/s | 2.4 |
| 1996 | 6.6°C | 2.0°C | -2.6°C | 19.2°C | -12.9°C | 106 mm | 86% | 2.4 m/s | 2 |
| 1995 | 8.4°C | 3.8°C | -0.8°C | 19.4°C | -8.1°C | 110 mm | 87% | 2.1 m/s | 2.2 |
| 1994 | 4.5°C | -0.1°C | -4.8°C | 17.2°C | -21.4°C | 146 mm | 88% | 2 m/s | 2 |
| 1993 | 9.7°C | 4.5°C | -0.7°C | 17.4°C | -6.0°C | 96 mm | 84% | 1.9 m/s | 2.1 |
| 1992 | 8.0°C | 3.3°C | -1.4°C | 13.5°C | -9.9°C | 61 mm | 88% | 1.7 m/s | 2.5 |
| 1991 | 7.3°C | 3.0°C | -1.4°C | 15.0°C | -5.7°C | 73 mm | 91% | 1.7 m/s | 2.1 |
| 1990 | 11.2°C | 5.7°C | 0.3°C | 17.9°C | -5.5°C | 109 mm | 86% | 2.1 m/s | 2.3 |
| 1989 | 9.9°C | 5.2°C | 0.5°C | 19.0°C | -4.1°C | 205 mm | 89% | 1.7 m/s | 2.4 |
| 1988 | 4.3°C | 0.1°C | -4.0°C | 20.1°C | -12.3°C | 104 mm | 88% | 2.1 m/s | 2.4 |
| 1987 | 7.1°C | 2.4°C | -2.3°C | 16.5°C | -11.0°C | 45 mm | 88% | 1.9 m/s | 2.3 |
| 1986 | 8.3°C | 2.6°C | -3.2°C | 19.1°C | -13.3°C | 16 mm | 79% | 2 m/s | 2.8 |
| 1985 ❄️ | 2.0°C | -2.6°C | -7.2°C | 18.2°C | -22.2°C | 82 mm | 87% | 2.3 m/s | 2.3 |
| 1984 | 3.9°C | -0.7°C | -5.2°C | 13.9°C | -16.9°C | 43 mm | 89% | 1.7 m/s | 2.3 |
| 1983 | 5.7°C | 1.7°C | -2.3°C | 13.0°C | -6.9°C | 63 mm | 90% | 1.8 m/s | — |
| 1982 | 5.8°C | 0.1°C | -5.6°C | 18.7°C | -20.0°C | 175 mm | 82% | 2.5 m/s | — |
| 1981 | 5.7°C | 0.5°C | -4.6°C | 16.7°C | -13.9°C | 41 mm | 79% | 1.7 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 7.7°C with lows near -2.1°C (mean 2.8°C), based on 45 years of NASA POWER data.
January averages 105 mm of rainfall in Jackson, about average for rainfall. The wettest on record was 243 mm in 1999.
The hottest January reached 24.1°C in 2022. The coldest dipped to -22.2°C in 1985.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 3.1°C. Daytime highs moved from 4.6°C to 8°C and overnight lows from -5°C to -2.3°C over the same span.
January is one of the cooler months of the year in Jackson and about average for rainfall, so plan for around 7.7°C daytime highs and -2.1°C at night.
Yes — January is the coldest month of the year in Jackson, averaging 2.8°C.
For January in Jackson, pack warm layers and a jacket for chilly mornings, with typical highs of 7.7°C and lows of -2.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 85% — quite humid.
Average wind speed in January is 2 m/s. The windiest January on record averaged 2.5 m/s (1982).
The wettest January on record was 1999 with 243 mm. On average, January sees 105 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 Jackson 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.
