January is one of the cooler months of the year in Greenock, with average highs near 5.2°C and lows around 2°C (mean 3.6°C). It is a relatively wet time of year, averaging 157 mm of rainfall and 93% relative humidity across the period.
January is one of the cooler months of the year in Greenock. Across 45 years of records, the warmest January in Greenock was 1989 — when the month averaged 6.3°C — while the coldest was 1985 at -0.2°C. Typical January days reach 5.2°C with nights near 2°C. The long-term trend is warming, about 0.3°C per decade.
January is a relatively wet time of year in Greenock, averaging 157 mm of rainfall. The wettest January on record was 1993 with 270 mm, while the driest was 1997 at 56 mm.
Relative humidity in Greenock during January averages 93%. The most humid January was 1982 at 96%, and the least humid was 1993 at 90%.
January receives about 0.5 kWh/m²/day of solar energy in Greenock. 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 Greenock during January is 5.1 m/s. The windiest January was 1993 at 7.8 m/s, while the calmest was 1997 at 3.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 2.6°C | 3.7°C | 4.3°C | 3.3°C | 4.1°C | +1.5°C |
| Avg High | 4.2°C | 5.3°C | 5.9°C | 4.9°C | 5.7°C | +1.5°C |
| Avg Low | 1.0°C | 2.1°C | 2.7°C | 1.8°C | 2.5°C | +1.5°C |
| Avg Rain | 153 mm | 178 mm | 166 mm | 152 mm | 123 mm | -30 mm |
January temperatures in Greenock have risen by about 1.6°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -11.7°C (1982) to a record high of 11.4°C (2020).
Rainfall in January is a relatively wet time of year, averaging 157 mm, with a wettest year of 270 mm.
A quieter season to visit Greenock
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Greenock. That said, January — with days averaging 5.2°C and nights around 2°C (mean 3.6°C) and higher rainfall (157 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 | 5.3°C | 3.9°C | 2.4°C | 10.1°C | -2.5°C | 73 mm | 93% | 4.1 m/s | 0.6 |
| 2024 | 5.3°C | 3.7°C | 2.0°C | 10.8°C | -3.6°C | 140 mm | 93% | 4.7 m/s | 0.6 |
| 2023 | 6.2°C | 4.6°C | 3.0°C | 9.8°C | -1.5°C | 144 mm | 93% | 4.9 m/s | 0.6 |
| 2022 | 7.0°C | 5.2°C | 3.5°C | 10.9°C | 0.4°C | 101 mm | 93% | 5 m/s | 0.5 |
| 2021 | 3.3°C | 1.7°C | 0.2°C | 8.0°C | -3.2°C | 109 mm | 93% | 3.7 m/s | 0.6 |
| 2020 | 6.9°C | 5.4°C | 4.0°C | 11.4°C | 0.4°C | 172 mm | 93% | 5.9 m/s | 0.4 |
| 2019 | 5.3°C | 3.7°C | 2.2°C | 9.4°C | -2.2°C | 75 mm | 92% | 4.1 m/s | 0.6 |
| 2018 | 4.5°C | 3.1°C | 1.7°C | 9.2°C | -3.7°C | 198 mm | 93% | 4.9 m/s | 0.5 |
| 2017 | 5.9°C | 4.3°C | 2.8°C | 9.4°C | -0.6°C | 95 mm | 93% | 4.4 m/s | 0.5 |
| 2016 | 5.0°C | 3.5°C | 2.1°C | 10.4°C | -1.9°C | 230 mm | 93% | 5.4 m/s | 0.4 |
| 2015 | 5.2°C | 3.5°C | 1.8°C | 10.9°C | -2.1°C | 220 mm | 91% | 6.4 m/s | 0.5 |
| 2014 | 5.5°C | 4.2°C | 2.9°C | 7.8°C | -0.5°C | 189 mm | 94% | 5.1 m/s | 0.4 |
| 2013 | 4.8°C | 3.4°C | 2.0°C | 9.5°C | -2.4°C | 162 mm | 94% | 5 m/s | 0.5 |
| 2012 | 6.1°C | 4.3°C | 2.6°C | 9.1°C | -0.9°C | 152 mm | 92% | 5.6 m/s | 0.5 |
| 2011 | 4.1°C | 2.6°C | 1.1°C | 9.5°C | -2.6°C | 119 mm | 93% | 3.5 m/s | 0.6 |
| 2010 | 2.6°C | 0.8°C | -0.9°C | 7.5°C | -6.0°C | 76 mm | 94% | 4.1 m/s | 0.6 |
| 2009 | 4.9°C | 3.5°C | 2.1°C | 9.6°C | -1.9°C | 173 mm | 93% | 5.1 m/s | 0.5 |
| 2008 | 6.2°C | 4.7°C | 3.2°C | 10.5°C | -0.7°C | 219 mm | 93% | 5.5 m/s | 0.4 |
| 2007 | 7.0°C | 5.4°C | 3.7°C | 10.6°C | -0.6°C | 212 mm | 92% | 6.4 m/s | 0.5 |
| 2006 | 5.8°C | 4.3°C | 2.7°C | 10.3°C | -0.6°C | 115 mm | 94% | 4.1 m/s | 0.5 |
| 2005 | 7.1°C | 5.3°C | 3.4°C | 10.8°C | -1.2°C | 191 mm | 92% | 6.7 m/s | 0.5 |
| 2004 | 6.0°C | 4.4°C | 2.8°C | 9.3°C | -1.3°C | 193 mm | 93% | 4.8 m/s | 0.5 |
| 2003 | 5.1°C | 3.4°C | 1.8°C | 10.3°C | -4.2°C | 135 mm | 92% | 5.4 m/s | 0.5 |
| 2002 | 6.7°C | 5.1°C | 3.4°C | 10.0°C | -2.0°C | 179 mm | 94% | 5.3 m/s | 0.5 |
| 2001 | 3.7°C | 2.3°C | 0.9°C | 6.4°C | -2.8°C | 96 mm | 95% | 3.9 m/s | 0.6 |
| 2000 | 6.3°C | 4.7°C | 3.0°C | 8.8°C | -0.4°C | 153 mm | 93% | 5.1 m/s | 0.6 |
| 1999 | 5.4°C | 4.0°C | 2.6°C | 8.1°C | -0.1°C | 229 mm | 93% | 5.2 m/s | 0.5 |
| 1998 | 5.8°C | 4.3°C | 2.7°C | 10.2°C | -1.5°C | 166 mm | 93% | 4.6 m/s | 0.6 |
| 1997 | 3.9°C | 2.4°C | 0.8°C | 9.0°C | -4.7°C | 56 mm | 95% | 3.1 m/s | 0.5 |
| 1996 | 4.8°C | 3.6°C | 2.3°C | 8.9°C | -2.0°C | 141 mm | 94% | 6 m/s | 0.4 |
| 1995 | 4.8°C | 3.0°C | 1.2°C | 9.3°C | -4.1°C | 210 mm | 92% | 5.9 m/s | 0.5 |
| 1994 | 4.8°C | 3.2°C | 1.7°C | 8.3°C | -1.5°C | 165 mm | 92% | 5.9 m/s | 0.4 |
| 1993 🌧️ | 6.5°C | 4.4°C | 2.4°C | 10.7°C | -0.9°C | 270 mm | 90% | 7.8 m/s | 0.5 |
| 1992 | 5.9°C | 4.3°C | 2.7°C | 10.5°C | -1.3°C | 146 mm | 94% | 4.2 m/s | 0.5 |
| 1991 | 4.2°C | 2.6°C | 1.0°C | 9.1°C | -1.8°C | 160 mm | 93% | 5.1 m/s | 0.4 |
| 1990 | 6.7°C | 5.1°C | 3.5°C | 10.7°C | -0.3°C | 238 mm | 93% | 6.5 m/s | 0.5 |
| 1989 🔥 | 7.7°C | 6.3°C | 4.9°C | 10.3°C | 1.5°C | 201 mm | 93% | 6.4 m/s | 0.4 |
| 1988 | 4.7°C | 3.4°C | 2.1°C | 9.6°C | -2.0°C | 193 mm | 93% | 5 m/s | 0.5 |
| 1987 | 2.3°C | 0.7°C | -0.8°C | 7.0°C | -6.1°C | 67 mm | 93% | 3.8 m/s | 0.6 |
| 1986 | 3.6°C | 2.1°C | 0.5°C | 8.7°C | -5.2°C | 164 mm | 91% | 6 m/s | 0.5 |
| 1985 ❄️ | 1.5°C | -0.2°C | -1.9°C | 7.2°C | -8.7°C | 64 mm | 94% | 3.3 m/s | 0.6 |
| 1984 | 3.2°C | 1.5°C | -0.3°C | 9.2°C | -8.4°C | 189 mm | 91% | 5.9 m/s | 0.5 |
| 1983 | 6.5°C | 4.9°C | 3.3°C | 10.6°C | -1.8°C | 203 mm | 91% | 7.7 m/s | — |
| 1982 | 2.9°C | 1.1°C | -0.7°C | 8.6°C | -11.7°C | 145 mm | 96% | 4.7 m/s | — |
| 1981 | 5.8°C | 3.9°C | 2.0°C | 9.2°C | -1.9°C | 154 mm | 92% | 5.4 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 5.2°C with lows near 2°C (mean 3.6°C), based on 45 years of NASA POWER data.
January averages 157 mm of rainfall in Greenock, a relatively wet time of year. The wettest on record was 270 mm in 1993.
The hottest January reached 11.4°C in 2020. The coldest dipped to -11.7°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 1.6°C. Daytime highs moved from 4°C to 5.4°C and overnight lows from 0.5°C to 2.2°C over the same span.
January is one of the cooler months of the year in Greenock and a relatively wet time of year, so plan for around 5.2°C daytime highs and 2°C at night.
Yes — January is the coldest month of the year in Greenock, averaging 3.6°C.
For January in Greenock, pack warm layers and a jacket for chilly mornings, with typical highs of 5.2°C and lows of 2°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 93% — quite humid.
Average wind speed in January is 5.1 m/s. The windiest January on record averaged 7.8 m/s (1993).
The wettest January on record was 1993 with 270 mm. On average, January sees 157 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 Greenock 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.
