January is one of the cooler months of the year in Newnan, with average highs near 10.8°C and lows around -0.1°C (mean 5.4°C). It is a relatively wet time of year, averaging 118 mm of rainfall and 83% relative humidity across the period.
January is one of the cooler months of the year in Newnan. Across 45 years of records, the warmest January in Newnan was 2017 — when the month averaged 9.5°C — while the coldest was 2014 at 1.2°C. Typical January days reach 10.8°C with nights near -0.1°C. The long-term trend is warming, about 0.5°C per decade.
January is a relatively wet time of year in Newnan, averaging 118 mm of rainfall. The wettest January on record was 2023 with 201 mm, while the driest was 1981 at 28 mm.
Relative humidity in Newnan during January averages 83%. The most humid January was 1998 at 89%, and the least humid was 1981 at 72%.
January receives about 2.7 kWh/m²/day of solar energy in Newnan. The sunniest January was 2018 at 3.1 kWh/m²/day, and the cloudiest was 1991 at 2.
Average wind speed in Newnan during January is 0.1 m/s. The windiest Januarys were 2023, 2024 and 2025, among others at 0.1 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 3.6°C | 6.0°C | 5.9°C | 5.2°C | 6.1°C | +2.5°C |
| Avg High | 9.0°C | 11.2°C | 11.5°C | 10.6°C | 11.8°C | +2.8°C |
| Avg Low | -1.8°C | 0.7°C | 0.3°C | -0.3°C | 0.5°C | +2.3°C |
| Avg Rain | 100 mm | 146 mm | 94 mm | 116 mm | 141 mm | +41 mm |
January temperatures in Newnan have risen by about 2.9°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -19.2°C (1985) to a record high of 24.2°C (2022).
Rainfall in January is a relatively wet time of year, averaging 118 mm, with a wettest year of 201 mm.
A quieter season to visit Newnan
If your dates are flexible, the more temperate months of September and May tend to be the most comfortable for visiting Newnan. That said, January — with days averaging 10.8°C and nights around -0.1°C (mean 5.4°C) and higher rainfall (118 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 | 9.0°C | 3.1°C | -2.9°C | 18.6°C | -11.9°C | 72 mm | 78% | 0.1 m/s | 2.9 |
| 2024 | 10.8°C | 5.1°C | -0.6°C | 21.7°C | -10.2°C | 193 mm | 81% | 0.1 m/s | 2.9 |
| 2023 🌧️ | 14.6°C | 9.0°C | 3.4°C | 21.4°C | -5.2°C | 201 mm | 85% | 0.1 m/s | 2.6 |
| 2022 | 10.6°C | 4.7°C | -1.2°C | 24.2°C | -6.1°C | 90 mm | 80% | 0.1 m/s | 2.9 |
| 2021 | 12.0°C | 6.4°C | 0.7°C | 21.6°C | -5.0°C | 97 mm | 84% | 0.1 m/s | 2.5 |
| 2020 | 13.6°C | 8.5°C | 3.4°C | 21.4°C | -5.9°C | 194 mm | 85% | 0.1 m/s | 2.5 |
| 2019 | 11.5°C | 6.2°C | 1.0°C | 18.8°C | -5.8°C | 149 mm | 84% | 0.1 m/s | 2.6 |
| 2018 | 9.0°C | 3.1°C | -2.8°C | 18.7°C | -10.4°C | 79 mm | 75% | 0.1 m/s | 3.1 |
| 2017 🔥 | 14.7°C | 9.5°C | 4.4°C | 22.8°C | -12.8°C | 197 mm | 86% | 0.1 m/s | 2.7 |
| 2016 | 9.2°C | 4.2°C | -0.8°C | 17.8°C | -6.3°C | 113 mm | 84% | 0.1 m/s | 2.7 |
| 2015 | 10.3°C | 4.7°C | -0.8°C | 18.0°C | -9.9°C | 86 mm | 81% | 0.1 m/s | 2.7 |
| 2014 ❄️ | 7.2°C | 1.2°C | -4.8°C | 17.3°C | -13.6°C | 69 mm | 76% | 0.1 m/s | 3 |
| 2013 | 14.0°C | 8.5°C | 3.1°C | 22.3°C | -4.4°C | 158 mm | 86% | 0.1 m/s | 2.3 |
| 2012 | 14.0°C | 8.2°C | 2.3°C | 20.4°C | -6.1°C | 120 mm | 82% | 0.1 m/s | 2.7 |
| 2011 | 8.6°C | 3.2°C | -2.2°C | 18.7°C | -9.0°C | 69 mm | 82% | 0.1 m/s | 2.7 |
| 2010 | 7.9°C | 2.9°C | -2.1°C | 18.8°C | -10.1°C | 123 mm | 82% | 0.1 m/s | 2.8 |
| 2009 | 11.4°C | 5.6°C | -0.2°C | 21.5°C | -9.0°C | 105 mm | 82% | 0.1 m/s | 2.7 |
| 2008 | 9.8°C | 4.5°C | -0.8°C | 19.9°C | -10.6°C | 85 mm | 79% | 0.1 m/s | 3 |
| 2007 | 12.1°C | 6.6°C | 1.2°C | 21.6°C | -7.7°C | 96 mm | 82% | 0.1 m/s | 2.7 |
| 2006 | 14.5°C | 8.8°C | 3.2°C | 21.7°C | -3.8°C | 114 mm | 83% | 0.1 m/s | 2.7 |
| 2005 | 13.2°C | 7.7°C | 2.2°C | 20.1°C | -6.6°C | 55 mm | 83% | 0.1 m/s | 2.8 |
| 2004 | 11.1°C | 5.2°C | -0.7°C | 21.0°C | -7.8°C | 76 mm | 80% | 0.1 m/s | 2.8 |
| 2003 | 8.5°C | 3.2°C | -2.0°C | 16.5°C | -11.5°C | 55 mm | 79% | 0.1 m/s | 3 |
| 2002 | 13.4°C | 7.3°C | 1.1°C | 23.4°C | -6.6°C | 134 mm | 83% | 0.1 m/s | 2.8 |
| 2001 | 9.7°C | 4.0°C | -1.7°C | 19.5°C | -9.9°C | 102 mm | 83% | 0.1 m/s | 2.8 |
| 2000 | 11.1°C | 5.7°C | 0.2°C | 21.5°C | -6.7°C | 118 mm | 78% | 0.1 m/s | 2.6 |
| 1999 | 13.4°C | 7.5°C | 1.5°C | 21.6°C | -9.4°C | 159 mm | 83% | 0.1 m/s | 2.6 |
| 1998 | 12.1°C | 7.3°C | 2.5°C | 20.1°C | -6.0°C | 146 mm | 89% | 0.1 m/s | 2.5 |
| 1997 | 11.2°C | 5.9°C | 0.6°C | 21.1°C | -9.6°C | 162 mm | 82% | 0.1 m/s | 2.5 |
| 1996 | 10.5°C | 4.6°C | -1.3°C | 20.5°C | -7.0°C | 195 mm | 86% | 0.1 m/s | 2.4 |
| 1995 | 11.3°C | 5.8°C | 0.3°C | 18.7°C | -7.6°C | 93 mm | 84% | 0.1 m/s | 2.6 |
| 1994 | 7.9°C | 2.6°C | -2.6°C | 16.7°C | -15.5°C | 107 mm | 82% | 0.1 m/s | 2.5 |
| 1993 | 11.8°C | 7.0°C | 2.2°C | 16.4°C | -3.8°C | 131 mm | 88% | 0.1 m/s | 2.1 |
| 1992 | 10.3°C | 5.4°C | 0.4°C | 18.0°C | -8.1°C | 140 mm | 87% | 0.1 m/s | 2.6 |
| 1991 | 10.5°C | 6.0°C | 1.5°C | 17.8°C | -5.8°C | 139 mm | 88% | 0.1 m/s | 2 |
| 1990 | 13.0°C | 7.4°C | 1.8°C | 20.1°C | -5.4°C | 189 mm | 88% | 0.1 m/s | 2.7 |
| 1989 | 13.5°C | 7.7°C | 2.0°C | 20.6°C | -4.4°C | 80 mm | 82% | 0.1 m/s | 2.7 |
| 1988 | 7.6°C | 2.7°C | -2.2°C | 19.9°C | -8.4°C | 131 mm | 83% | 0.1 m/s | 2.6 |
| 1987 | 9.1°C | 4.0°C | -1.0°C | 18.8°C | -8.2°C | 155 mm | 87% | 0.1 m/s | 2.5 |
| 1986 | 10.2°C | 4.0°C | -2.3°C | 18.5°C | -13.6°C | 30 mm | 79% | 0.1 m/s | 2.9 |
| 1985 | 7.1°C | 1.8°C | -3.5°C | 19.1°C | -19.2°C | 119 mm | 80% | 0.1 m/s | 2.6 |
| 1984 | 8.5°C | 3.2°C | -2.1°C | 15.2°C | -11.0°C | 114 mm | 86% | 0.1 m/s | 2.7 |
| 1983 | 8.3°C | 3.7°C | -0.9°C | 16.0°C | -5.7°C | 90 mm | 88% | 0.1 m/s | — |
| 1982 | 8.4°C | 2.7°C | -3.0°C | 20.2°C | -18.2°C | 149 mm | 84% | 0.1 m/s | — |
| 1981 | 8.5°C | 2.7°C | -3.0°C | 17.0°C | -11.2°C | 28 mm | 72% | 0.1 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 10.8°C with lows near -0.1°C (mean 5.4°C), based on 45 years of NASA POWER data.
January averages 118 mm of rainfall in Newnan, a relatively wet time of year. The wettest on record was 201 mm in 2023.
The hottest January reached 24.2°C in 2022. The coldest dipped to -19.2°C in 1985.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 2.9°C. Daytime highs moved from 8.2°C to 11.4°C and overnight lows from -2.5°C to -0.1°C over the same span.
January is one of the cooler months of the year in Newnan and a relatively wet time of year, so plan for around 10.8°C daytime highs and -0.1°C at night.
Yes — January is the coldest month of the year in Newnan, averaging 5.4°C.
For January in Newnan, pack warm layers and a jacket for chilly mornings, with typical highs of 10.8°C and lows of -0.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 83% — quite humid.
Average wind speed in January is 0.1 m/s. The windiest January on record averaged 0.1 m/s (1981).
The wettest January on record was 2023 with 201 mm. On average, January sees 118 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 Newnan 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.
