January is one of the cooler months of the year in Grovetown, with average highs near 11.9°C and lows around 0.9°C (mean 6.4°C). It is about average for rainfall, averaging 104 mm of rainfall and 82% relative humidity across the period.
January is one of the cooler months of the year in Grovetown. Across 45 years of records, the warmest January in Grovetown was 2017 — when the month averaged 10.5°C — while the coldest was 1988 at 3.2°C. Typical January days reach 11.9°C with nights near 0.9°C. The long-term trend is warming, about 0.5°C per decade.
January is about average for rainfall in Grovetown, averaging 104 mm of rainfall. The wettest January on record was 2017 with 197 mm, while the driest was 1981 at 25 mm.
Relative humidity in Grovetown during January averages 82%. The most humid January was 1998 at 89%, and the least humid was 1981 at 71%.
January receives about 2.8 kWh/m²/day of solar energy in Grovetown. The sunniest Januarys were 2018 and 2025 at 3.2 kWh/m²/day, and the cloudiest were 1991 and 1993 at 2.1.
Average wind speed in Grovetown during January is 1.1 m/s. The windiest Januarys were 1982, 1985 and 1996 at 1.3 m/s, while the calmest were 2001, 2016 and 2021, among others at 1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 4.6°C | 6.9°C | 6.9°C | 6.4°C | 7.4°C | +2.8°C |
| Avg High | 9.9°C | 12.2°C | 12.5°C | 12.0°C | 12.9°C | +3°C |
| Avg Low | -0.7°C | 1.7°C | 1.2°C | 0.9°C | 1.9°C | +2.6°C |
| Avg Rain | 96 mm | 137 mm | 81 mm | 93 mm | 119 mm | +22 mm |
January temperatures in Grovetown have risen by about 2.9°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -17°C (1985) to a record high of 25.6°C (2002).
Rainfall in January is about average for rainfall, averaging 104 mm, with a wettest year of 197 mm.
A quieter season to visit Grovetown
If your dates are flexible, the more temperate months of May and September tend to be the most comfortable for visiting Grovetown. That said, January — with days averaging 11.9°C and nights around 0.9°C (mean 6.4°C) and higher rainfall (104 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 | 10.1°C | 4.2°C | -1.7°C | 21.8°C | -5.9°C | 66 mm | 76% | 1.1 m/s | 3.2 |
| 2024 | 12.7°C | 7.0°C | 1.2°C | 22.6°C | -7.2°C | 121 mm | 81% | 1.2 m/s | 2.9 |
| 2023 | 15.5°C | 9.9°C | 4.3°C | 21.6°C | -4.8°C | 175 mm | 85% | 1.1 m/s | 2.5 |
| 2022 | 11.8°C | 6.3°C | 0.8°C | 24.7°C | -5.2°C | 94 mm | 79% | 1.2 m/s | 3 |
| 2021 | 12.8°C | 7.6°C | 2.4°C | 22.4°C | -3.5°C | 119 mm | 84% | 1 m/s | 2.6 |
| 2020 | 14.5°C | 9.5°C | 4.6°C | 23.3°C | -4.7°C | 137 mm | 86% | 1.2 m/s | 2.6 |
| 2019 | 13.1°C | 7.6°C | 2.1°C | 20.3°C | -5.5°C | 114 mm | 84% | 1.1 m/s | 2.8 |
| 2018 | 10.5°C | 4.5°C | -1.6°C | 20.3°C | -9.1°C | 74 mm | 74% | 1.1 m/s | 3.2 |
| 2017 🔥 🌧️ | 15.9°C | 10.5°C | 5.1°C | 23.2°C | -8.6°C | 197 mm | 86% | 1.1 m/s | 2.8 |
| 2016 | 10.6°C | 5.4°C | 0.2°C | 17.2°C | -5.7°C | 61 mm | 85% | 1 m/s | 2.8 |
| 2015 | 11.4°C | 6.0°C | 0.5°C | 19.5°C | -8.8°C | 76 mm | 80% | 1.1 m/s | 2.8 |
| 2014 | 9.2°C | 3.3°C | -2.5°C | 19.5°C | -9.9°C | 82 mm | 78% | 1.2 m/s | 3 |
| 2013 | 15.5°C | 10.0°C | 4.4°C | 24.0°C | -3.7°C | 67 mm | 83% | 1.1 m/s | 2.7 |
| 2012 | 15.3°C | 9.1°C | 3.0°C | 22.6°C | -5.1°C | 58 mm | 79% | 1.2 m/s | 2.9 |
| 2011 | 9.6°C | 4.0°C | -1.5°C | 20.4°C | -6.9°C | 64 mm | 81% | 1.1 m/s | 2.8 |
| 2010 | 8.9°C | 3.8°C | -1.2°C | 18.7°C | -8.7°C | 135 mm | 83% | 1.1 m/s | 3 |
| 2009 | 11.9°C | 6.3°C | 0.8°C | 21.2°C | -6.8°C | 51 mm | 82% | 1.1 m/s | 2.6 |
| 2008 | 10.6°C | 5.6°C | 0.6°C | 21.6°C | -7.1°C | 91 mm | 80% | 1.1 m/s | 2.9 |
| 2007 | 13.6°C | 8.1°C | 2.7°C | 21.2°C | -6.6°C | 106 mm | 82% | 1.1 m/s | 2.6 |
| 2006 | 15.7°C | 9.9°C | 4.1°C | 21.2°C | -3.2°C | 85 mm | 83% | 1.2 m/s | 2.9 |
| 2005 | 13.9°C | 8.5°C | 3.0°C | 22.9°C | -6.9°C | 52 mm | 80% | 1.2 m/s | 2.8 |
| 2004 | 11.8°C | 5.8°C | -0.3°C | 22.9°C | -6.8°C | 70 mm | 76% | 1.1 m/s | 2.8 |
| 2003 | 10.4°C | 4.7°C | -1.0°C | 18.5°C | -8.1°C | 50 mm | 77% | 1.2 m/s | 3.1 |
| 2002 | 14.8°C | 8.4°C | 2.0°C | 25.6°C | -8.4°C | 92 mm | 79% | 1.1 m/s | 2.8 |
| 2001 | 11.5°C | 5.7°C | -0.1°C | 21.7°C | -7.4°C | 65 mm | 80% | 1 m/s | 3 |
| 2000 | 10.8°C | 5.5°C | 0.3°C | 22.7°C | -8.9°C | 153 mm | 81% | 1.2 m/s | 2.6 |
| 1999 | 15.4°C | 9.0°C | 2.5°C | 22.9°C | -7.1°C | 142 mm | 80% | 1.2 m/s | 2.8 |
| 1998 | 13.0°C | 8.2°C | 3.4°C | 22.1°C | -5.7°C | 163 mm | 89% | 1.1 m/s | 2.7 |
| 1997 | 12.0°C | 6.8°C | 1.6°C | 21.3°C | -7.2°C | 128 mm | 81% | 1.2 m/s | 2.7 |
| 1996 | 11.6°C | 5.5°C | -0.6°C | 21.7°C | -6.5°C | 122 mm | 85% | 1.3 m/s | 2.7 |
| 1995 | 12.2°C | 6.7°C | 1.1°C | 19.9°C | -6.7°C | 129 mm | 84% | 1.2 m/s | 2.8 |
| 1994 | 8.9°C | 3.9°C | -1.2°C | 19.9°C | -9.9°C | 102 mm | 81% | 1.2 m/s | 2.5 |
| 1993 | 12.2°C | 7.6°C | 3.1°C | 18.6°C | -3.6°C | 157 mm | 89% | 1.1 m/s | 2.1 |
| 1992 | 11.7°C | 6.6°C | 1.4°C | 18.4°C | -6.2°C | 142 mm | 84% | 1.2 m/s | 2.8 |
| 1991 | 11.3°C | 6.7°C | 2.0°C | 19.0°C | -5.2°C | 186 mm | 87% | 1 m/s | 2.1 |
| 1990 | 13.7°C | 8.4°C | 3.2°C | 20.5°C | -4.9°C | 100 mm | 86% | 1 m/s | 2.8 |
| 1989 | 14.2°C | 8.6°C | 3.0°C | 20.9°C | -4.4°C | 51 mm | 80% | 1 m/s | 2.6 |
| 1988 ❄️ | 8.1°C | 3.2°C | -1.6°C | 19.0°C | -8.0°C | 120 mm | 84% | 1.1 m/s | 2.4 |
| 1987 | 9.6°C | 4.9°C | 0.1°C | 18.4°C | -5.3°C | 183 mm | 86% | 1.2 m/s | 2.6 |
| 1986 | 10.1°C | 4.3°C | -1.6°C | 19.0°C | -12.2°C | 38 mm | 80% | 1.1 m/s | 2.9 |
| 1985 | 8.8°C | 3.3°C | -2.2°C | 22.8°C | -17.0°C | 100 mm | 75% | 1.3 m/s | 2.6 |
| 1984 | 9.7°C | 4.6°C | -0.6°C | 15.7°C | -8.0°C | 119 mm | 85% | 1 m/s | 2.7 |
| 1983 | 9.4°C | 4.6°C | -0.1°C | 17.8°C | -6.1°C | 118 mm | 86% | 1.1 m/s | — |
| 1982 | 9.5°C | 4.1°C | -1.3°C | 19.7°C | -14.4°C | 113 mm | 84% | 1.3 m/s | — |
| 1981 | 9.8°C | 3.7°C | -2.4°C | 18.1°C | -7.9°C | 25 mm | 71% | 1.1 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 11.9°C with lows near 0.9°C (mean 6.4°C), based on 45 years of NASA POWER data.
January averages 104 mm of rainfall in Grovetown, about average for rainfall. The wettest on record was 197 mm in 2017.
The hottest January reached 25.6°C in 2002. The coldest dipped to -17°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 9.4°C to 12.6°C and overnight lows from -1.3°C to 1.4°C over the same span.
January is one of the cooler months of the year in Grovetown and about average for rainfall, so plan for around 11.9°C daytime highs and 0.9°C at night.
Yes — January is the coldest month of the year in Grovetown, averaging 6.4°C.
For January in Grovetown, pack warm layers and a jacket for chilly mornings, with typical highs of 11.9°C and lows of 0.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 82% — quite humid.
Average wind speed in January is 1.1 m/s. The windiest January on record averaged 1.3 m/s (1982).
The wettest January on record was 2017 with 197 mm. On average, January sees 104 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 Grovetown 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.
