January is one of the cooler months of the year in Chambersburg, with average highs near 1.3°C and lows around -6.9°C (mean -2.8°C). It is one of the drier months, averaging 71 mm of rainfall and 87% relative humidity across the period.
January is one of the cooler months of the year in Chambersburg. Across 45 years of records, the warmest January in Chambersburg was 2023 — when the month averaged 2.3°C — while the coldest was 1994 at -9.2°C. Typical January days reach 1.3°C with nights near -6.9°C. The long-term trend is warming, about 0.6°C per decade.
January is one of the drier months in Chambersburg, averaging 71 mm of rainfall. The wettest January on record was 1996 with 172 mm, while the driest was 1981 at 7 mm.
Relative humidity in Chambersburg during January averages 87%. The most humid January was 1994 at 97%, and the least humid was 1981 at 80%.
January receives about 2 kWh/m²/day of solar energy in Chambersburg. The sunniest Januarys were 2014, 2016 and 2025, among others at 2.2 kWh/m²/day, and the cloudiest was 2017 at 1.6.
Average wind speed in Chambersburg during January is 1.5 m/s. The windiest Januarys were 1997 and 2000 at 1.8 m/s, while the calmest were 1984 and 2001 at 1.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -4.5°C | -2.6°C | -2.3°C | -2.9°C | -1.3°C | +3.2°C |
| Avg High | -0.2°C | 1.5°C | 1.9°C | 1.2°C | 2.7°C | +2.9°C |
| Avg Low | -8.7°C | -6.7°C | -6.5°C | -7.0°C | -5.3°C | +3.4°C |
| Avg Rain | 51 mm | 95 mm | 66 mm | 70 mm | 71 mm | +21 mm |
January temperatures in Chambersburg have risen by about 3.6°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -32.6°C (1994) to a record high of 18.9°C (2002).
Rainfall in January is one of the drier months, averaging 71 mm, with a wettest year of 172 mm.
A quieter season to visit Chambersburg
If your dates are flexible, the more temperate months of August and June tend to be the most comfortable for visiting Chambersburg. That said, January — with days averaging 1.3°C and nights around -6.9°C (mean -2.8°C) and moderate rainfall (71 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 | -0.4°C | -4.5°C | -8.6°C | 6.6°C | -18.9°C | 32 mm | 83% | 1.6 m/s | 2.2 |
| 2024 | 3.1°C | -0.9°C | -4.8°C | 18.1°C | -13.0°C | 154 mm | 89% | 1.4 m/s | 1.7 |
| 2023 🔥 | 6.1°C | 2.3°C | -1.5°C | 14.2°C | -6.4°C | 62 mm | 89% | 1.3 m/s | 1.7 |
| 2022 | 0.2°C | -4.1°C | -8.5°C | 12.4°C | -16.7°C | 59 mm | 83% | 1.5 m/s | 2 |
| 2021 | 2.3°C | -1.1°C | -4.6°C | 7.6°C | -10.0°C | 41 mm | 87% | 1.3 m/s | 2 |
| 2020 | 5.0°C | 0.7°C | -3.6°C | 17.8°C | -12.3°C | 79 mm | 86% | 1.4 m/s | 2 |
| 2019 | 0.9°C | -3.3°C | -7.4°C | 10.1°C | -23.7°C | 91 mm | 89% | 1.6 m/s | 1.8 |
| 2018 | 1.6°C | -2.9°C | -7.5°C | 18.6°C | -18.6°C | 63 mm | 82% | 1.6 m/s | 2.1 |
| 2017 | 3.5°C | 0.2°C | -3.1°C | 13.9°C | -12.9°C | 82 mm | 84% | 1.4 m/s | 1.6 |
| 2016 | 0.6°C | -3.7°C | -8.1°C | 11.5°C | -17.0°C | 91 mm | 85% | 1.5 m/s | 2.2 |
| 2015 | -0.3°C | -4.4°C | -8.4°C | 6.8°C | -15.2°C | 59 mm | 85% | 1.5 m/s | 1.9 |
| 2014 | -1.1°C | -5.7°C | -10.2°C | 7.5°C | -19.6°C | 44 mm | 85% | 1.5 m/s | 2.2 |
| 2013 | 2.4°C | -1.6°C | -5.6°C | 17.5°C | -14.4°C | 82 mm | 88% | 1.4 m/s | 1.9 |
| 2012 | 3.7°C | -0.4°C | -4.5°C | 11.8°C | -12.9°C | 72 mm | 88% | 1.5 m/s | 2.1 |
| 2011 | -0.5°C | -4.4°C | -8.3°C | 5.3°C | -16.4°C | 40 mm | 86% | 1.3 m/s | 1.8 |
| 2010 | 0.7°C | -3.2°C | -7.0°C | 10.8°C | -14.8°C | 80 mm | 87% | 1.6 m/s | 2.1 |
| 2009 | -1.4°C | -5.5°C | -9.7°C | 6.5°C | -20.1°C | 56 mm | 87% | 1.4 m/s | 2 |
| 2008 | 3.3°C | -0.8°C | -5.0°C | 16.8°C | -14.2°C | 47 mm | 83% | 1.4 m/s | 2.2 |
| 2007 | 4.7°C | 0.6°C | -3.5°C | 16.9°C | -12.3°C | 53 mm | 84% | 1.5 m/s | 1.9 |
| 2006 | 6.2°C | 1.6°C | -2.9°C | 13.7°C | -8.5°C | 107 mm | 88% | 1.5 m/s | 1.9 |
| 2005 | 2.0°C | -2.3°C | -6.7°C | 17.0°C | -18.5°C | 100 mm | 89% | 1.5 m/s | 1.8 |
| 2004 | -2.1°C | -6.1°C | -10.2°C | 15.6°C | -18.1°C | 65 mm | 86% | 1.7 m/s | 1.9 |
| 2003 | -1.9°C | -5.5°C | -9.1°C | 7.3°C | -16.3°C | 60 mm | 86% | 1.5 m/s | 2 |
| 2002 | 5.8°C | 1.2°C | -3.3°C | 18.9°C | -11.3°C | 52 mm | 82% | 1.3 m/s | 2.1 |
| 2001 | 1.4°C | -3.0°C | -7.4°C | 6.3°C | -16.6°C | 60 mm | 89% | 1.2 m/s | 2 |
| 2000 | 1.1°C | -2.9°C | -6.9°C | 13.9°C | -15.7°C | 56 mm | 82% | 1.8 m/s | 2 |
| 1999 | 2.0°C | -2.7°C | -7.3°C | 17.0°C | -17.1°C | 143 mm | 87% | 1.4 m/s | 1.9 |
| 1998 | 4.4°C | 0.8°C | -2.9°C | 18.7°C | -13.6°C | 130 mm | 92% | 1.3 m/s | 1.8 |
| 1997 | 0.6°C | -3.4°C | -7.5°C | 16.2°C | -18.8°C | 51 mm | 86% | 1.8 m/s | 2 |
| 1996 🌧️ | -1.5°C | -5.9°C | -10.4°C | 8.8°C | -20.4°C | 172 mm | 93% | 1.6 m/s | 1.7 |
| 1995 | 2.7°C | -0.9°C | -4.5°C | 16.5°C | -13.2°C | 95 mm | 86% | 1.5 m/s | 2.1 |
| 1994 ❄️ | -4.4°C | -9.2°C | -14.0°C | 4.2°C | -32.6°C | 118 mm | 97% | 1.3 m/s | 2 |
| 1993 | 2.7°C | -1.0°C | -4.7°C | 11.4°C | -9.5°C | 49 mm | 85% | 1.4 m/s | 1.8 |
| 1992 | 2.8°C | -1.4°C | -5.6°C | 12.9°C | -13.0°C | 44 mm | 85% | 1.6 m/s | 2 |
| 1991 | 1.4°C | -2.7°C | -6.9°C | 7.7°C | -13.3°C | 68 mm | 88% | 1.4 m/s | 2.1 |
| 1990 | 4.6°C | 0.5°C | -3.7°C | 13.0°C | -10.0°C | 85 mm | 88% | 1.3 m/s | 1.9 |
| 1989 | 3.4°C | -1.1°C | -5.6°C | 9.2°C | -14.6°C | 63 mm | 86% | 1.4 m/s | 1.9 |
| 1988 | -0.9°C | -5.0°C | -9.2°C | 9.1°C | -17.4°C | 57 mm | 86% | 1.4 m/s | 1.9 |
| 1987 | -0.6°C | -4.6°C | -8.6°C | 9.3°C | -26.0°C | 85 mm | 93% | 1.4 m/s | 2 |
| 1986 | 1.4°C | -2.9°C | -7.3°C | 12.5°C | -15.5°C | 44 mm | 86% | 1.4 m/s | 2.1 |
| 1985 | -1.4°C | -5.3°C | -9.1°C | 11.9°C | -24.2°C | 34 mm | 83% | 1.7 m/s | 2.2 |
| 1984 | -1.9°C | -6.7°C | -11.4°C | 7.7°C | -25.5°C | 34 mm | 93% | 1.2 m/s | 1.9 |
| 1983 | 2.1°C | -1.7°C | -5.5°C | 7.7°C | -14.5°C | 45 mm | 84% | 1.3 m/s | — |
| 1982 | -3.1°C | -7.6°C | -12.2°C | 8.3°C | -23.1°C | 86 mm | 87% | 1.7 m/s | — |
| 1981 | -1.1°C | -5.3°C | -9.5°C | 9.4°C | -16.0°C | 7 mm | 80% | 1.5 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 1.3°C with lows near -6.9°C (mean -2.8°C), based on 45 years of NASA POWER data.
January averages 71 mm of rainfall in Chambersburg, one of the drier months. The wettest on record was 172 mm in 1996.
The hottest January reached 18.9°C in 2002. The coldest dipped to -32.6°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 3.6°C. Daytime highs moved from -1.1°C to 2.3°C and overnight lows from -9.5°C to -5.6°C over the same span.
January is one of the cooler months of the year in Chambersburg and one of the drier months, so plan for around 1.3°C daytime highs and -6.9°C at night.
Yes — January is the coldest month of the year in Chambersburg, averaging -2.8°C.
For January in Chambersburg, pack warm layers and a jacket for chilly mornings, with typical highs of 1.3°C and lows of -6.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 87% — quite humid.
Average wind speed in January is 1.5 m/s. The windiest January on record averaged 1.8 m/s (1997).
The wettest January on record was 1996 with 172 mm. On average, January sees 71 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 Chambersburg 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.
