January is one of the cooler months of the year in Kennesaw, with average highs near 10°C and lows around -0.7°C (mean 4.7°C). It is a relatively wet time of year, averaging 119 mm of rainfall and 83% relative humidity across the period.
January is one of the cooler months of the year in Kennesaw. Across 45 years of records, the warmest January in Kennesaw was 2017 — when the month averaged 9°C — while the coldest was 2014 at 0.8°C. Typical January days reach 10°C with nights near -0.7°C. The long-term trend is warming, about 0.5°C per decade.
January is a relatively wet time of year in Kennesaw, averaging 119 mm of rainfall. The wettest January on record was 1996 with 213 mm, while the driest was 1981 at 25 mm.
Relative humidity in Kennesaw during January averages 83%. The most humid January was 1998 at 90%, and the least humid was 1981 at 73%.
January receives about 2.5 kWh/m²/day of solar energy in Kennesaw. The sunniest Januarys were 2014 and 2018 at 2.9 kWh/m²/day, and the cloudiest was 1991 at 2.
Average wind speed in Kennesaw during January is 1.3 m/s. The windiest Januarys were 1982, 1985 and 1996 at 1.5 m/s, while the calmest were 1990, 1991 and 2001, among others at 1.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 3.0°C | 5.2°C | 5.2°C | 4.6°C | 5.6°C | +2.6°C |
| Avg High | 8.3°C | 10.3°C | 10.7°C | 9.9°C | 11.0°C | +2.7°C |
| Avg Low | -2.3°C | 0.1°C | -0.4°C | -0.8°C | 0.2°C | +2.5°C |
| Avg Rain | 102 mm | 152 mm | 95 mm | 112 mm | 141 mm | +39 mm |
January temperatures in Kennesaw have risen by about 2.9°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -19.9°C (1985) to a record high of 23.8°C (2022).
Rainfall in January is a relatively wet time of year, averaging 119 mm, with a wettest year of 213 mm.
A quieter season to visit Kennesaw
If your dates are flexible, the more temperate months of September and May tend to be the most comfortable for visiting Kennesaw. That said, January — with days averaging 10°C and nights around -0.7°C (mean 4.7°C) and higher rainfall (119 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 | 8.3°C | 2.6°C | -3.1°C | 17.6°C | -11.9°C | 74 mm | 77% | 1.2 m/s | 2.7 |
| 2024 | 9.9°C | 4.5°C | -1.0°C | 21.2°C | -11.9°C | 189 mm | 81% | 1.4 m/s | 2.5 |
| 2023 | 13.8°C | 8.5°C | 3.1°C | 20.6°C | -5.3°C | 203 mm | 85% | 1.2 m/s | 2.2 |
| 2022 | 9.8°C | 4.2°C | -1.3°C | 23.8°C | -5.3°C | 93 mm | 81% | 1.3 m/s | 2.7 |
| 2021 | 11.1°C | 5.7°C | 0.4°C | 20.4°C | -4.8°C | 104 mm | 84% | 1.2 m/s | 2.4 |
| 2020 | 12.8°C | 7.9°C | 3.0°C | 20.7°C | -5.8°C | 181 mm | 85% | 1.3 m/s | 2.3 |
| 2019 | 10.8°C | 5.8°C | 0.8°C | 19.0°C | -5.8°C | 147 mm | 84% | 1.3 m/s | 2.5 |
| 2018 | 8.5°C | 2.7°C | -3.1°C | 18.2°C | -10.6°C | 65 mm | 75% | 1.3 m/s | 2.9 |
| 2017 🔥 | 14.2°C | 9.0°C | 3.8°C | 22.4°C | -11.1°C | 157 mm | 84% | 1.3 m/s | 2.5 |
| 2016 | 8.4°C | 3.7°C | -1.1°C | 17.0°C | -6.5°C | 106 mm | 84% | 1.2 m/s | 2.6 |
| 2015 | 9.5°C | 4.1°C | -1.4°C | 17.3°C | -9.6°C | 96 mm | 81% | 1.2 m/s | 2.6 |
| 2014 ❄️ | 6.8°C | 0.8°C | -5.1°C | 16.8°C | -14.5°C | 71 mm | 77% | 1.3 m/s | 2.9 |
| 2013 | 13.0°C | 7.6°C | 2.2°C | 21.9°C | -4.6°C | 172 mm | 85% | 1.2 m/s | 2.2 |
| 2012 | 13.3°C | 7.5°C | 1.6°C | 19.4°C | -6.0°C | 116 mm | 83% | 1.3 m/s | 2.5 |
| 2011 | 8.1°C | 2.7°C | -2.6°C | 18.7°C | -9.7°C | 67 mm | 82% | 1.2 m/s | 2.5 |
| 2010 | 6.7°C | 1.8°C | -3.0°C | 17.8°C | -11.1°C | 127 mm | 84% | 1.4 m/s | 2.7 |
| 2009 | 10.4°C | 4.7°C | -1.0°C | 20.8°C | -8.9°C | 110 mm | 82% | 1.2 m/s | 2.5 |
| 2008 | 9.1°C | 4.0°C | -1.2°C | 19.7°C | -10.4°C | 78 mm | 78% | 1.2 m/s | 2.8 |
| 2007 | 11.5°C | 6.0°C | 0.5°C | 20.4°C | -7.7°C | 93 mm | 81% | 1.3 m/s | 2.6 |
| 2006 | 13.7°C | 8.1°C | 2.5°C | 20.2°C | -5.0°C | 126 mm | 84% | 1.4 m/s | 2.5 |
| 2005 | 12.4°C | 6.9°C | 1.5°C | 19.9°C | -6.8°C | 48 mm | 84% | 1.2 m/s | 2.6 |
| 2004 | 10.2°C | 4.2°C | -1.7°C | 20.8°C | -7.9°C | 78 mm | 80% | 1.2 m/s | 2.6 |
| 2003 | 8.0°C | 2.8°C | -2.4°C | 16.4°C | -12.5°C | 54 mm | 80% | 1.3 m/s | 2.7 |
| 2002 | 12.8°C | 6.6°C | 0.4°C | 23.2°C | -7.1°C | 140 mm | 81% | 1.2 m/s | 2.5 |
| 2001 | 9.4°C | 3.9°C | -1.7°C | 19.2°C | -10.4°C | 102 mm | 82% | 1.1 m/s | 2.7 |
| 2000 | 9.9°C | 4.5°C | -0.8°C | 20.8°C | -7.8°C | 127 mm | 79% | 1.4 m/s | 2.6 |
| 1999 | 12.8°C | 6.9°C | 1.0°C | 21.1°C | -10.2°C | 158 mm | 83% | 1.4 m/s | 2.3 |
| 1998 | 11.1°C | 6.5°C | 1.9°C | 19.5°C | -6.3°C | 160 mm | 90% | 1.2 m/s | 2.3 |
| 1997 | 10.3°C | 5.1°C | -0.2°C | 20.7°C | -11.2°C | 149 mm | 82% | 1.4 m/s | 2.4 |
| 1996 🌧️ | 9.0°C | 3.6°C | -1.8°C | 19.8°C | -8.4°C | 213 mm | 88% | 1.5 m/s | 2.3 |
| 1995 | 10.5°C | 5.2°C | -0.2°C | 17.9°C | -7.5°C | 109 mm | 84% | 1.3 m/s | 2.3 |
| 1994 | 6.8°C | 1.7°C | -3.3°C | 15.6°C | -15.9°C | 126 mm | 83% | 1.3 m/s | 2.2 |
| 1993 | 10.7°C | 6.1°C | 1.5°C | 15.4°C | -3.7°C | 154 mm | 88% | 1.2 m/s | 2.1 |
| 1992 | 10.1°C | 5.0°C | -0.1°C | 17.2°C | -8.6°C | 141 mm | 86% | 1.3 m/s | 2.5 |
| 1991 | 9.6°C | 5.3°C | 1.1°C | 16.4°C | -5.9°C | 133 mm | 88% | 1.1 m/s | 2 |
| 1990 | 11.8°C | 6.6°C | 1.4°C | 19.0°C | -5.3°C | 181 mm | 89% | 1.1 m/s | 2.5 |
| 1989 | 12.8°C | 7.1°C | 1.4°C | 19.8°C | -4.5°C | 91 mm | 81% | 1.2 m/s | 2.6 |
| 1988 | 7.0°C | 2.1°C | -2.7°C | 17.5°C | -10.0°C | 137 mm | 83% | 1.2 m/s | 2.6 |
| 1987 | 8.3°C | 3.4°C | -1.5°C | 18.0°C | -8.9°C | 153 mm | 88% | 1.2 m/s | 2.3 |
| 1986 | 9.4°C | 3.3°C | -2.8°C | 17.4°C | -14.5°C | 30 mm | 79% | 1.2 m/s | 2.8 |
| 1985 | 6.2°C | 1.1°C | -4.0°C | 18.6°C | -19.9°C | 120 mm | 80% | 1.5 m/s | 2.4 |
| 1984 | 7.8°C | 2.7°C | -2.4°C | 14.1°C | -9.7°C | 112 mm | 86% | 1.1 m/s | 2.6 |
| 1983 | 7.7°C | 3.2°C | -1.4°C | 15.6°C | -5.9°C | 84 mm | 87% | 1.2 m/s | — |
| 1982 | 7.6°C | 1.8°C | -3.9°C | 18.5°C | -18.5°C | 162 mm | 84% | 1.5 m/s | — |
| 1981 | 7.9°C | 2.2°C | -3.5°C | 16.5°C | -12.2°C | 25 mm | 73% | 1.2 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 10°C with lows near -0.7°C (mean 4.7°C), based on 45 years of NASA POWER data.
January averages 119 mm of rainfall in Kennesaw, a relatively wet time of year. The wettest on record was 213 mm in 1996.
The hottest January reached 23.8°C in 2022. The coldest dipped to -19.9°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 7.4°C to 10.6°C and overnight lows from -3°C to -0.4°C over the same span.
January is one of the cooler months of the year in Kennesaw and a relatively wet time of year, so plan for around 10°C daytime highs and -0.7°C at night.
Yes — January is the coldest month of the year in Kennesaw, averaging 4.7°C.
For January in Kennesaw, pack warm layers and a jacket for chilly mornings, with typical highs of 10°C and lows of -0.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 83% — quite humid.
Average wind speed in January is 1.3 m/s. The windiest January on record averaged 1.5 m/s (1982).
The wettest January on record was 1996 with 213 mm. On average, January sees 119 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 Kennesaw 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.
