January is one of the cooler months of the year in Coleraine, with average highs near 6.3°C and lows around 2.9°C (mean 4.6°C). It is about average for rainfall, averaging 107 mm of rainfall and 91% relative humidity across the period.
January is one of the cooler months of the year in Coleraine. Across 45 years of records, the warmest January in Coleraine was 1989 — when the month averaged 6.5°C — while the coldest was 1985 at 1.4°C. Typical January days reach 6.3°C with nights near 2.9°C. The long-term trend is warming, about 0.2°C per decade.
January is about average for rainfall in Coleraine, averaging 107 mm of rainfall. The wettest January on record was 2008 with 165 mm, while the driest was 1997 at 38 mm.
Relative humidity in Coleraine during January averages 91%. The most humid January was 1992 at 94%, and the least humid was 1984 at 89%.
January receives about 0.5 kWh/m²/day of solar energy in Coleraine. The sunniest Januarys were 2023, 2024 and 2025, among others at 0.6 kWh/m²/day, and the cloudiest were 2008, 2013 and 2016, among others at 0.4.
Average wind speed in Coleraine during January is 5.5 m/s. The windiest Januarys were 1983 and 1993 at 7.6 m/s, while the calmest were 1985 and 1997 at 3.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 3.9°C | 4.5°C | 5.2°C | 4.4°C | 5.0°C | +1.1°C |
| Avg High | 5.6°C | 6.3°C | 6.8°C | 6.1°C | 6.7°C | +1.1°C |
| Avg Low | 2.2°C | 2.8°C | 3.5°C | 2.8°C | 3.3°C | +1.1°C |
| Avg Rain | 111 mm | 112 mm | 111 mm | 109 mm | 85 mm | -26 mm |
January temperatures in Coleraine have risen by about 1.2°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -5.4°C (1982) to a record high of 12.6°C (2020).
Rainfall in January is about average for rainfall, averaging 107 mm, with a wettest year of 165 mm.
A quieter season to visit Coleraine
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Coleraine. That said, January — with days averaging 6.3°C and nights around 2.9°C (mean 4.6°C) and higher rainfall (107 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 | 6.4°C | 4.8°C | 3.3°C | 11.5°C | 0.0°C | 80 mm | 92% | 4.6 m/s | 0.6 |
| 2024 | 6.6°C | 4.9°C | 3.2°C | 11.9°C | -0.3°C | 83 mm | 90% | 5 m/s | 0.6 |
| 2023 | 7.0°C | 5.4°C | 3.7°C | 10.8°C | -0.1°C | 89 mm | 91% | 5.4 m/s | 0.6 |
| 2022 | 7.3°C | 5.5°C | 3.6°C | 11.7°C | 0.4°C | 59 mm | 91% | 5.2 m/s | 0.5 |
| 2021 | 5.3°C | 3.8°C | 2.3°C | 9.1°C | 0.0°C | 122 mm | 90% | 4.1 m/s | 0.6 |
| 2020 | 7.3°C | 5.5°C | 3.6°C | 12.6°C | 0.0°C | 78 mm | 93% | 6 m/s | 0.5 |
| 2019 | 6.5°C | 5.0°C | 3.4°C | 10.4°C | -1.1°C | 64 mm | 91% | 4.5 m/s | 0.5 |
| 2018 | 6.0°C | 4.5°C | 3.0°C | 11.0°C | 0.1°C | 159 mm | 92% | 5.8 m/s | 0.5 |
| 2017 | 6.8°C | 5.2°C | 3.5°C | 10.4°C | -0.4°C | 64 mm | 92% | 4.9 m/s | 0.5 |
| 2016 | 6.8°C | 5.0°C | 3.2°C | 12.3°C | 0.0°C | 151 mm | 92% | 5.6 m/s | 0.4 |
| 2015 | 6.1°C | 4.2°C | 2.4°C | 12.0°C | -0.3°C | 131 mm | 89% | 6.7 m/s | 0.5 |
| 2014 | 6.2°C | 4.6°C | 3.0°C | 9.5°C | 0.8°C | 110 mm | 93% | 5.4 m/s | 0.5 |
| 2013 | 6.0°C | 4.3°C | 2.6°C | 10.8°C | -1.2°C | 135 mm | 93% | 5.3 m/s | 0.4 |
| 2012 | 7.2°C | 5.3°C | 3.4°C | 10.0°C | 0.5°C | 119 mm | 91% | 6.1 m/s | 0.5 |
| 2011 | 5.1°C | 3.4°C | 1.7°C | 10.9°C | -1.4°C | 77 mm | 91% | 4 m/s | 0.6 |
| 2010 | 4.3°C | 2.8°C | 1.3°C | 8.4°C | -2.8°C | 80 mm | 91% | 4.5 m/s | 0.5 |
| 2009 | 5.7°C | 4.0°C | 2.3°C | 10.8°C | -1.1°C | 116 mm | 93% | 5.6 m/s | 0.5 |
| 2008 🌧️ | 7.0°C | 5.3°C | 3.6°C | 11.9°C | -0.9°C | 165 mm | 92% | 5.9 m/s | 0.4 |
| 2007 | 8.0°C | 6.3°C | 4.6°C | 11.4°C | 1.2°C | 127 mm | 90% | 6.7 m/s | 0.5 |
| 2006 | 6.8°C | 5.0°C | 3.2°C | 11.3°C | -0.3°C | 69 mm | 92% | 4.7 m/s | 0.5 |
| 2005 | 8.2°C | 6.3°C | 4.5°C | 11.9°C | -0.1°C | 109 mm | 90% | 7 m/s | 0.5 |
| 2004 | 6.8°C | 5.3°C | 3.8°C | 10.1°C | -0.3°C | 157 mm | 92% | 5.3 m/s | 0.4 |
| 2003 | 6.4°C | 4.7°C | 3.1°C | 11.8°C | -1.3°C | 102 mm | 90% | 5.7 m/s | 0.5 |
| 2002 | 7.9°C | 6.0°C | 4.1°C | 11.0°C | -1.4°C | 117 mm | 93% | 6 m/s | 0.5 |
| 2001 | 4.8°C | 3.4°C | 1.9°C | 7.9°C | -2.1°C | 71 mm | 93% | 4.5 m/s | 0.6 |
| 2000 | 6.8°C | 5.2°C | 3.6°C | 10.0°C | 0.7°C | 73 mm | 92% | 5.4 m/s | 0.5 |
| 1999 | 6.3°C | 4.6°C | 3.0°C | 10.3°C | -0.4°C | 143 mm | 92% | 5.6 m/s | 0.5 |
| 1998 | 6.5°C | 4.8°C | 3.1°C | 12.0°C | -0.8°C | 124 mm | 91% | 5.1 m/s | 0.5 |
| 1997 | 5.4°C | 3.7°C | 2.1°C | 10.2°C | -1.5°C | 38 mm | 92% | 3.5 m/s | 0.5 |
| 1996 | 6.4°C | 5.0°C | 3.7°C | 10.0°C | -0.8°C | 108 mm | 93% | 6.1 m/s | 0.4 |
| 1995 | 6.1°C | 4.2°C | 2.2°C | 10.6°C | -1.0°C | 147 mm | 91% | 6.1 m/s | 0.4 |
| 1994 | 6.0°C | 4.3°C | 2.6°C | 9.2°C | 1.1°C | 121 mm | 91% | 6.2 m/s | 0.5 |
| 1993 | 7.5°C | 5.1°C | 2.8°C | 12.0°C | -0.3°C | 147 mm | 89% | 7.6 m/s | 0.5 |
| 1992 | 6.4°C | 4.7°C | 3.0°C | 11.3°C | -1.2°C | 78 mm | 94% | 4.5 m/s | 0.5 |
| 1991 | 5.0°C | 3.1°C | 1.3°C | 10.4°C | -1.6°C | 88 mm | 92% | 5.7 m/s | 0.5 |
| 1990 | 7.4°C | 5.5°C | 3.7°C | 11.7°C | 0.7°C | 125 mm | 92% | 6.7 m/s | 0.5 |
| 1989 🔥 | 8.3°C | 6.5°C | 4.7°C | 11.7°C | 0.4°C | 95 mm | 92% | 6.5 m/s | 0.5 |
| 1988 | 5.6°C | 4.1°C | 2.6°C | 10.7°C | 0.4°C | 149 mm | 92% | 5.5 m/s | 0.5 |
| 1987 | 4.2°C | 2.6°C | 1.0°C | 9.1°C | -4.2°C | 47 mm | 90% | 4.2 m/s | 0.5 |
| 1986 | 4.9°C | 3.4°C | 1.9°C | 10.5°C | -1.1°C | 143 mm | 90% | 6.3 m/s | 0.4 |
| 1985 ❄️ | 3.1°C | 1.4°C | -0.3°C | 9.2°C | -5.2°C | 78 mm | 89% | 3.5 m/s | 0.5 |
| 1984 | 4.8°C | 2.9°C | 1.0°C | 10.6°C | -4.4°C | 162 mm | 89% | 6.4 m/s | 0.4 |
| 1983 | 7.3°C | 5.4°C | 3.5°C | 11.6°C | -1.2°C | 112 mm | 90% | 7.6 m/s | — |
| 1982 | 5.0°C | 3.5°C | 2.0°C | 10.4°C | -5.4°C | 96 mm | 92% | 5.3 m/s | — |
| 1981 | 7.2°C | 5.4°C | 3.7°C | 11.0°C | -0.4°C | 115 mm | 90% | 6.1 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 6.3°C with lows near 2.9°C (mean 4.6°C), based on 45 years of NASA POWER data.
January averages 107 mm of rainfall in Coleraine, about average for rainfall. The wettest on record was 165 mm in 2008.
The hottest January reached 12.6°C in 2020. The coldest dipped to -5.4°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 1.2°C. Daytime highs moved from 5.5°C to 6.5°C and overnight lows from 2°C to 3.2°C over the same span.
January is one of the cooler months of the year in Coleraine and about average for rainfall, so plan for around 6.3°C daytime highs and 2.9°C at night.
Yes — January is the coldest month of the year in Coleraine, averaging 4.6°C.
For January in Coleraine, pack warm layers and a jacket for chilly mornings, with typical highs of 6.3°C and lows of 2.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 91% — quite humid.
Average wind speed in January is 5.5 m/s. The windiest January on record averaged 7.6 m/s (1983).
The wettest January on record was 2008 with 165 mm. On average, January sees 107 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 Coleraine 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.
