January is one of the cooler months of the year in Newton Mearns, with average highs near 4.4°C and lows around 0.8°C (mean 2.6°C). It is a relatively wet time of year, averaging 136 mm of rainfall and 95% relative humidity across the period.
January is one of the cooler months of the year in Newton Mearns. Across 45 years of records, the warmest January in Newton Mearns was 1989 — when the month averaged 5.6°C — while the coldest was 1985 at -1.3°C. Typical January days reach 4.4°C with nights near 0.8°C. The long-term trend is warming, about 0.3°C per decade.
January is a relatively wet time of year in Newton Mearns, averaging 136 mm of rainfall. The wettest January on record was 1993 with 235 mm, while the driest was 1997 at 52 mm.
Relative humidity in Newton Mearns during January averages 95%. The most humid Januarys were 1982, 1997 and 2001 at 97%, and the least humid was 1993 at 92%.
January receives about 0.5 kWh/m²/day of solar energy in Newton Mearns. The sunniest Januarys were 2023, 2024 and 2025, among others at 0.6 kWh/m²/day, and the cloudiest were 2014, 2016 and 2020, among others at 0.4.
Average wind speed in Newton Mearns during January is 4.4 m/s. The windiest Januarys were 1983 and 1993 at 7 m/s, while the calmest was 1997 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 1.6°C | 2.8°C | 3.4°C | 2.4°C | 3.2°C | +1.6°C |
| Avg High | 3.4°C | 4.5°C | 5.2°C | 4.1°C | 4.9°C | +1.5°C |
| Avg Low | -0.2°C | 1.0°C | 1.5°C | 0.6°C | 1.3°C | +1.5°C |
| Avg Rain | 132 mm | 155 mm | 142 mm | 130 mm | 108 mm | -24 mm |
January temperatures in Newton Mearns have risen by about 1.7°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -15.3°C (1982) to a record high of 11.1°C (2020).
Rainfall in January is a relatively wet time of year, averaging 136 mm, with a wettest year of 235 mm.
A quieter season to visit Newton Mearns
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Newton Mearns. That said, January — with days averaging 4.4°C and nights around 0.8°C (mean 2.6°C) and higher rainfall (136 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 | 4.5°C | 2.9°C | 1.2°C | 9.8°C | -4.6°C | 69 mm | 96% | 3.4 m/s | 0.6 |
| 2024 | 4.6°C | 2.8°C | 0.9°C | 10.4°C | -5.4°C | 126 mm | 95% | 4.1 m/s | 0.6 |
| 2023 | 5.5°C | 3.6°C | 1.8°C | 9.5°C | -2.9°C | 126 mm | 95% | 4.3 m/s | 0.6 |
| 2022 | 6.4°C | 4.4°C | 2.4°C | 10.7°C | -1.4°C | 82 mm | 95% | 4.5 m/s | 0.5 |
| 2021 | 2.2°C | 0.5°C | -1.2°C | 7.5°C | -5.3°C | 101 mm | 95% | 3 m/s | 0.6 |
| 2020 | 6.4°C | 4.7°C | 3.0°C | 11.1°C | -0.7°C | 145 mm | 95% | 5.3 m/s | 0.4 |
| 2019 | 4.4°C | 2.6°C | 0.8°C | 9.2°C | -3.2°C | 56 mm | 94% | 3.4 m/s | 0.6 |
| 2018 | 3.7°C | 2.1°C | 0.5°C | 9.2°C | -5.6°C | 165 mm | 96% | 4.1 m/s | 0.5 |
| 2017 | 5.0°C | 3.2°C | 1.4°C | 8.9°C | -2.6°C | 79 mm | 95% | 3.6 m/s | 0.5 |
| 2016 | 4.2°C | 2.5°C | 0.8°C | 10.5°C | -4.4°C | 218 mm | 95% | 4.6 m/s | 0.4 |
| 2015 | 4.6°C | 2.7°C | 0.8°C | 10.7°C | -3.8°C | 180 mm | 93% | 5.6 m/s | 0.5 |
| 2014 | 4.8°C | 3.4°C | 1.9°C | 7.4°C | -1.3°C | 173 mm | 96% | 4.3 m/s | 0.4 |
| 2013 | 4.0°C | 2.4°C | 0.9°C | 9.3°C | -4.0°C | 138 mm | 96% | 4.2 m/s | 0.5 |
| 2012 | 5.4°C | 3.4°C | 1.4°C | 9.0°C | -2.1°C | 118 mm | 95% | 4.8 m/s | 0.5 |
| 2011 | 3.2°C | 1.5°C | -0.2°C | 9.3°C | -5.5°C | 106 mm | 95% | 3 m/s | 0.6 |
| 2010 | 1.7°C | -0.3°C | -2.2°C | 7.2°C | -8.1°C | 69 mm | 96% | 3.3 m/s | 0.6 |
| 2009 | 4.1°C | 2.4°C | 0.8°C | 9.1°C | -5.1°C | 146 mm | 95% | 4.3 m/s | 0.5 |
| 2008 | 5.5°C | 3.9°C | 2.2°C | 10.3°C | -2.3°C | 206 mm | 95% | 4.9 m/s | 0.4 |
| 2007 | 6.5°C | 4.6°C | 2.6°C | 10.4°C | -1.7°C | 178 mm | 94% | 5.7 m/s | 0.5 |
| 2006 | 5.1°C | 3.3°C | 1.5°C | 9.9°C | -2.3°C | 90 mm | 96% | 3.4 m/s | 0.5 |
| 2005 | 6.6°C | 4.5°C | 2.3°C | 10.5°C | -2.4°C | 157 mm | 94% | 5.9 m/s | 0.5 |
| 2004 | 5.3°C | 3.5°C | 1.7°C | 9.3°C | -2.4°C | 166 mm | 96% | 4.1 m/s | 0.5 |
| 2003 | 4.5°C | 2.6°C | 0.7°C | 10.4°C | -6.4°C | 115 mm | 95% | 4.8 m/s | 0.5 |
| 2002 | 5.9°C | 4.0°C | 2.1°C | 9.7°C | -5.2°C | 161 mm | 96% | 4.5 m/s | 0.5 |
| 2001 | 2.8°C | 1.3°C | -0.2°C | 5.4°C | -4.5°C | 80 mm | 97% | 3.1 m/s | 0.6 |
| 2000 | 5.7°C | 3.7°C | 1.7°C | 8.5°C | -1.6°C | 121 mm | 95% | 4.5 m/s | 0.6 |
| 1999 | 4.7°C | 3.2°C | 1.7°C | 7.8°C | -2.0°C | 193 mm | 95% | 4.6 m/s | 0.5 |
| 1998 | 4.9°C | 3.3°C | 1.6°C | 10.0°C | -2.8°C | 149 mm | 95% | 4 m/s | 0.6 |
| 1997 | 3.2°C | 1.5°C | -0.3°C | 8.9°C | -6.2°C | 52 mm | 97% | 2.6 m/s | 0.5 |
| 1996 | 4.0°C | 2.8°C | 1.6°C | 9.0°C | -3.7°C | 126 mm | 95% | 5 m/s | 0.4 |
| 1995 | 3.8°C | 1.8°C | -0.2°C | 9.1°C | -6.0°C | 174 mm | 94% | 5.1 m/s | 0.5 |
| 1994 | 4.0°C | 2.4°C | 0.7°C | 8.0°C | -2.6°C | 144 mm | 94% | 5.2 m/s | 0.4 |
| 1993 🌧️ | 5.9°C | 3.6°C | 1.4°C | 10.5°C | -2.1°C | 235 mm | 92% | 7 m/s | 0.5 |
| 1992 | 5.1°C | 3.3°C | 1.5°C | 10.3°C | -3.8°C | 125 mm | 96% | 3.6 m/s | 0.5 |
| 1991 | 3.4°C | 1.5°C | -0.4°C | 9.1°C | -4.0°C | 137 mm | 96% | 4.2 m/s | 0.4 |
| 1990 | 6.0°C | 4.4°C | 2.7°C | 10.5°C | -1.6°C | 218 mm | 95% | 5.8 m/s | 0.5 |
| 1989 🔥 | 7.2°C | 5.6°C | 4.0°C | 9.9°C | 0.3°C | 163 mm | 95% | 5.7 m/s | 0.4 |
| 1988 | 4.0°C | 2.6°C | 1.1°C | 9.5°C | -2.9°C | 170 mm | 95% | 4.3 m/s | 0.5 |
| 1987 | 1.3°C | -0.4°C | -2.2°C | 5.9°C | -6.6°C | 61 mm | 95% | 3.1 m/s | 0.6 |
| 1986 | 2.8°C | 1.1°C | -0.7°C | 8.5°C | -7.5°C | 137 mm | 94% | 5.2 m/s | 0.5 |
| 1985 ❄️ | 0.7°C | -1.3°C | -3.3°C | 6.4°C | -12.2°C | 59 mm | 96% | 2.8 m/s | 0.6 |
| 1984 | 2.3°C | 0.2°C | -1.9°C | 8.8°C | -12.2°C | 169 mm | 94% | 5 m/s | 0.5 |
| 1983 | 5.9°C | 4.2°C | 2.5°C | 10.3°C | -2.8°C | 173 mm | 93% | 7 m/s | — |
| 1982 | 1.8°C | -0.3°C | -2.4°C | 8.5°C | -15.3°C | 140 mm | 97% | 3.9 m/s | — |
| 1981 | 5.0°C | 2.9°C | 0.7°C | 8.9°C | -3.5°C | 119 mm | 94% | 4.7 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 4.4°C with lows near 0.8°C (mean 2.6°C), based on 45 years of NASA POWER data.
January averages 136 mm of rainfall in Newton Mearns, a relatively wet time of year. The wettest on record was 235 mm in 1993.
The hottest January reached 11.1°C in 2020. The coldest dipped to -15.3°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 1.7°C. Daytime highs moved from 3.1°C to 4.6°C and overnight lows from -0.9°C to 1°C over the same span.
January is one of the cooler months of the year in Newton Mearns and a relatively wet time of year, so plan for around 4.4°C daytime highs and 0.8°C at night.
Yes — January is the coldest month of the year in Newton Mearns, averaging 2.6°C.
For January in Newton Mearns, pack warm layers and a jacket for chilly mornings, with typical highs of 4.4°C and lows of 0.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 95% — quite humid.
Average wind speed in January is 4.4 m/s. The windiest January on record averaged 7 m/s (1983).
The wettest January on record was 1993 with 235 mm. On average, January sees 136 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 Newton Mearns 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.
