January is one of the cooler months of the year in Post Falls, with average highs near -0.1°C and lows around -7°C (mean -3.5°C). It is a relatively wet time of year, averaging 96 mm of rainfall and 95% relative humidity across the period.
January is one of the cooler months of the year in Post Falls. Across 45 years of records, the warmest January in Post Falls was 1981 — when the month averaged 0.3°C — while the coldest was 1985 at -8.4°C. Typical January days reach -0.1°C with nights near -7°C. The long-term trend is warming, about 0.2°C per decade.
January is a relatively wet time of year in Post Falls, averaging 96 mm of rainfall. The wettest January on record was 2006 with 187 mm, while the driest was 1985 at 14 mm.
Relative humidity in Post Falls during January averages 95%. The most humid January was 1982 at 98%, and the least humid was 2012 at 91%.
January receives about 1.1 kWh/m²/day of solar energy in Post Falls. The sunniest Januarys were 1985 and 2025 at 1.4 kWh/m²/day, and the cloudiest were 2002, 2004 and 2020 at 0.9.
Average wind speed in Post Falls during January is 1 m/s. The windiest Januarys were 1990 and 2006 at 1.3 m/s, while the calmest was 1985 at 0.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -4.2°C | -3.9°C | -3.5°C | -3.1°C | -3.0°C | +1.2°C |
| Avg High | -0.5°C | -0.5°C | -0.1°C | 0.3°C | 0.4°C | +0.9°C |
| Avg Low | -7.9°C | -7.3°C | -6.9°C | -6.5°C | -6.4°C | +1.5°C |
| Avg Rain | 81 mm | 105 mm | 111 mm | 88 mm | 90 mm | +9 mm |
January temperatures in Post Falls have risen by about 0.7°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -32.8°C (2024) to a record high of 13.1°C (2024).
Rainfall in January is a relatively wet time of year, averaging 96 mm, with a wettest year of 187 mm.
A quieter season to visit Post Falls
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Post Falls. That said, January — with days averaging -0.1°C and nights around -7°C (mean -3.5°C) and higher rainfall (96 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 | -0.1°C | -4.5°C | -8.8°C | 1.9°C | -17.2°C | 50 mm | 93% | 0.9 m/s | 1.4 |
| 2024 | -0.7°C | -4.2°C | -7.7°C | 13.1°C | -32.8°C | 87 mm | 95% | 1 m/s | 1 |
| 2023 | 0.5°C | -2.9°C | -6.3°C | 5.4°C | -20.2°C | 47 mm | 94% | 0.9 m/s | 1.2 |
| 2022 | -0.5°C | -4.0°C | -7.6°C | 1.1°C | -22.1°C | 96 mm | 96% | 1 m/s | 1.1 |
| 2021 | 2.1°C | -1.1°C | -4.3°C | 6.5°C | -10.3°C | 93 mm | 92% | 1 m/s | 1.1 |
| 2020 | 0.9°C | -1.5°C | -3.8°C | 6.4°C | -14.2°C | 165 mm | 96% | 1.2 m/s | 0.9 |
| 2019 | 1.7°C | -2.0°C | -5.6°C | 3.7°C | -11.4°C | 64 mm | 93% | 0.9 m/s | 1.2 |
| 2018 | 0.7°C | -1.4°C | -3.6°C | 4.5°C | -13.9°C | 108 mm | 97% | 1 m/s | 1.1 |
| 2017 | -3.5°C | -8.1°C | -12.6°C | 0.8°C | -24.8°C | 50 mm | 97% | 0.9 m/s | 1.3 |
| 2016 | 0.4°C | -2.4°C | -5.2°C | 3.6°C | -18.2°C | 92 mm | 97% | 0.9 m/s | 1 |
| 2015 | 1.5°C | -1.7°C | -5.0°C | 9.7°C | -16.6°C | 84 mm | 95% | 0.8 m/s | 1.1 |
| 2014 | 1.7°C | -2.2°C | -6.1°C | 5.2°C | -14.5°C | 74 mm | 91% | 1 m/s | 1.2 |
| 2013 | -1.7°C | -5.3°C | -8.8°C | 1.5°C | -17.0°C | 75 mm | 96% | 0.9 m/s | 1.2 |
| 2012 | 0.7°C | -2.7°C | -6.2°C | 6.3°C | -12.6°C | 113 mm | 91% | 1.2 m/s | 1.2 |
| 2011 | -0.5°C | -3.9°C | -7.3°C | 6.8°C | -23.6°C | 141 mm | 96% | 1.1 m/s | 1.1 |
| 2010 | 2.2°C | -1.1°C | -4.4°C | 7.5°C | -22.8°C | 80 mm | 94% | 0.9 m/s | 1.2 |
| 2009 | -1.1°C | -5.1°C | -9.2°C | 1.9°C | -22.2°C | 105 mm | 95% | 1 m/s | 1.3 |
| 2008 | -2.2°C | -6.2°C | -10.3°C | 1.6°C | -25.1°C | 136 mm | 96% | 1.1 m/s | 1.2 |
| 2007 | -1.4°C | -5.2°C | -9.0°C | 3.1°C | -19.0°C | 81 mm | 92% | 1.1 m/s | 1.1 |
| 2006 🌧️ | 1.7°C | -0.5°C | -2.7°C | 4.5°C | -6.5°C | 187 mm | 96% | 1.3 m/s | 1 |
| 2005 | 1.3°C | -2.5°C | -6.3°C | 9.4°C | -22.0°C | 68 mm | 93% | 1 m/s | 1.2 |
| 2004 | -1.4°C | -4.4°C | -7.5°C | 2.8°C | -27.2°C | 114 mm | 97% | 0.9 m/s | 0.9 |
| 2003 | 2.6°C | -0.2°C | -3.1°C | 10.0°C | -11.3°C | 145 mm | 95% | 0.8 m/s | 1 |
| 2002 | -0.1°C | -3.0°C | -5.9°C | 3.6°C | -14.2°C | 135 mm | 96% | 1.1 m/s | 0.9 |
| 2001 | -0.2°C | -4.0°C | -7.7°C | 1.9°C | -13.4°C | 41 mm | 97% | 0.8 m/s | 1.2 |
| 2000 | -0.5°C | -4.0°C | -7.5°C | 2.0°C | -15.6°C | 98 mm | 98% | 1 m/s | 1.1 |
| 1999 | 0.4°C | -2.6°C | -5.6°C | 4.4°C | -21.1°C | 103 mm | 95% | 1.1 m/s | 1 |
| 1998 | -0.4°C | -3.6°C | -6.9°C | 4.4°C | -30.4°C | 123 mm | 97% | 1.1 m/s | 1.1 |
| 1997 | -2.0°C | -5.6°C | -9.2°C | 2.9°C | -25.9°C | 104 mm | 97% | 1 m/s | 1.1 |
| 1996 | -2.4°C | -6.3°C | -10.2°C | 3.8°C | -30.3°C | 129 mm | 97% | 1 m/s | 1 |
| 1995 | 1.2°C | -2.8°C | -6.8°C | 7.9°C | -18.5°C | 109 mm | 95% | 0.9 m/s | 1.2 |
| 1994 | 2.2°C | -0.3°C | -2.8°C | 6.8°C | -9.2°C | 72 mm | 94% | 0.8 m/s | 1 |
| 1993 | -3.8°C | -7.9°C | -12.0°C | 1.5°C | -22.8°C | 71 mm | 98% | 1 m/s | 1.3 |
| 1992 | 1.0°C | -2.2°C | -5.5°C | 6.5°C | -12.1°C | 91 mm | 95% | 1 m/s | 1 |
| 1991 | -2.1°C | -5.8°C | -9.6°C | 2.4°C | -19.9°C | 84 mm | 96% | 0.9 m/s | 1.1 |
| 1990 | 1.2°C | -1.7°C | -4.7°C | 5.6°C | -11.2°C | 167 mm | 94% | 1.3 m/s | 1 |
| 1989 | -1.1°C | -4.6°C | -8.1°C | 2.7°C | -21.1°C | 117 mm | 97% | 1.2 m/s | 1.2 |
| 1988 | -1.7°C | -6.0°C | -10.4°C | 2.2°C | -21.1°C | 72 mm | 97% | 0.9 m/s | 1.1 |
| 1987 | -1.2°C | -5.0°C | -8.8°C | 2.8°C | -22.3°C | 71 mm | 96% | 1 m/s | 1.2 |
| 1986 | 1.0°C | -2.1°C | -5.1°C | 6.0°C | -13.0°C | 105 mm | 97% | 1 m/s | 1 |
| 1985 ❄️ | -4.0°C | -8.4°C | -12.8°C | 0.1°C | -25.6°C | 14 mm | 98% | 0.7 m/s | 1.4 |
| 1984 | -1.1°C | -4.6°C | -8.1°C | 3.7°C | -22.7°C | 80 mm | 96% | 1 m/s | 1.1 |
| 1983 | 2.2°C | -0.7°C | -3.7°C | 5.4°C | -15.2°C | 101 mm | 95% | 1.1 m/s | — |
| 1982 | -3.0°C | -6.7°C | -10.4°C | 0.8°C | -30.0°C | 130 mm | 98% | 1.2 m/s | — |
| 1981 🔥 | 4.0°C | 0.3°C | -3.4°C | 11.0°C | -7.6°C | 38 mm | 91% | 0.8 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around -0.1°C with lows near -7°C (mean -3.5°C), based on 45 years of NASA POWER data.
January averages 96 mm of rainfall in Post Falls, a relatively wet time of year. The wettest on record was 187 mm in 2006.
The hottest January reached 13.1°C in 2024. The coldest dipped to -32.8°C in 2024.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 0.7°C. Daytime highs moved from -0.4°C to 0.3°C and overnight lows from -7.7°C to -6.9°C over the same span.
January is one of the cooler months of the year in Post Falls and a relatively wet time of year, so plan for around -0.1°C daytime highs and -7°C at night.
Not quite — January is the 2nd coolest month in Post Falls, averaging -3.5°C.
For January in Post Falls, pack warm layers and a jacket for chilly mornings, with typical highs of -0.1°C and lows of -7°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 95% — quite humid.
Average wind speed in January is 1 m/s. The windiest January on record averaged 1.3 m/s (1990).
The wettest January on record was 2006 with 187 mm. On average, January sees 96 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 Post Falls 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.
