January is one of the cooler months of the year in Larne, with average highs near 7.4°C and lows around 5.1°C (mean 6.3°C). It is a relatively wet time of year, averaging 107 mm of rainfall and 87% relative humidity across the period.
January is one of the cooler months of the year in Larne. Across 45 years of records, the warmest Januarys in Larne were 1989 and 2007 — when the month averaged 7.7°C — while the coldest was 1985 at 3.9°C. Typical January days reach 7.4°C with nights near 5.1°C. The long-term trend is warming, about 0.2°C per decade.
January is a relatively wet time of year in Larne, averaging 107 mm of rainfall. The wettest January on record was 2008 with 174 mm, while the driest was 1997 at 34 mm.
Relative humidity in Larne during January averages 87%. The most humid January was 2014 at 90%, and the least humid was 1985 at 82%.
January receives about 0.6 kWh/m²/day of solar energy in Larne. The sunniest Januarys were 2023, 2024 and 2025, among others at 0.7 kWh/m²/day, and the cloudiest were 2013, 2014 and 2016, among others at 0.5.
Average wind speed in Larne during January is 7.1 m/s. The windiest January was 1983 at 9.2 m/s, while the calmest was 1997 at 4.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 5.6°C | 6.2°C | 6.8°C | 6.2°C | 6.7°C | +1.1°C |
| Avg High | 6.8°C | 7.4°C | 8.0°C | 7.3°C | 7.8°C | +1°C |
| Avg Low | 4.3°C | 4.9°C | 5.6°C | 5.0°C | 5.6°C | +1.3°C |
| Avg Rain | 106 mm | 115 mm | 110 mm | 111 mm | 85 mm | -21 mm |
January temperatures in Larne have risen by about 1.2°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -1.9°C (1987) to a record high of 12.6°C (2015).
Rainfall in January is a relatively wet time of year, averaging 107 mm, with a wettest year of 174 mm.
A quieter season to visit Larne
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Larne. That said, January — with days averaging 7.4°C and nights around 5.1°C (mean 6.3°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 | 7.7°C | 6.6°C | 5.5°C | 11.1°C | 2.9°C | 68 mm | 87% | 6.2 m/s | 0.7 |
| 2024 | 7.7°C | 6.6°C | 5.6°C | 12.2°C | 2.3°C | 90 mm | 86% | 6.9 m/s | 0.7 |
| 2023 | 8.3°C | 7.2°C | 6.1°C | 11.3°C | 3.0°C | 97 mm | 87% | 7.1 m/s | 0.7 |
| 2022 | 8.4°C | 7.2°C | 6.0°C | 12.3°C | 3.8°C | 51 mm | 87% | 6.7 m/s | 0.6 |
| 2021 | 6.3°C | 5.4°C | 4.5°C | 9.5°C | 2.9°C | 123 mm | 86% | 5.8 m/s | 0.7 |
| 2020 | 8.3°C | 7.1°C | 5.8°C | 12.5°C | 2.9°C | 80 mm | 90% | 7.4 m/s | 0.6 |
| 2019 | 7.5°C | 6.6°C | 5.7°C | 10.4°C | 2.2°C | 61 mm | 85% | 6 m/s | 0.6 |
| 2018 | 7.4°C | 6.2°C | 5.0°C | 11.1°C | 2.5°C | 155 mm | 89% | 7.4 m/s | 0.6 |
| 2017 | 8.1°C | 7.0°C | 5.9°C | 10.5°C | 3.4°C | 71 mm | 87% | 6.4 m/s | 0.6 |
| 2016 | 8.1°C | 6.8°C | 5.5°C | 11.8°C | 2.3°C | 161 mm | 88% | 7.3 m/s | 0.5 |
| 2015 | 7.3°C | 5.9°C | 4.4°C | 12.6°C | 2.4°C | 134 mm | 86% | 8.5 m/s | 0.6 |
| 2014 | 7.5°C | 6.3°C | 5.2°C | 9.7°C | 3.0°C | 132 mm | 90% | 7 m/s | 0.5 |
| 2013 | 7.2°C | 6.0°C | 4.8°C | 11.0°C | 1.3°C | 127 mm | 89% | 7.1 m/s | 0.5 |
| 2012 | 8.2°C | 6.9°C | 5.6°C | 11.0°C | 3.1°C | 109 mm | 86% | 7.6 m/s | 0.6 |
| 2011 | 6.3°C | 5.3°C | 4.2°C | 10.9°C | 1.8°C | 75 mm | 87% | 5.5 m/s | 0.7 |
| 2010 | 5.6°C | 4.7°C | 3.8°C | 9.5°C | 1.3°C | 85 mm | 85% | 6.4 m/s | 0.6 |
| 2009 | 6.9°C | 5.7°C | 4.6°C | 10.5°C | 2.7°C | 112 mm | 88% | 7.1 m/s | 0.6 |
| 2008 🌧️ | 8.0°C | 6.9°C | 5.7°C | 12.1°C | 2.8°C | 174 mm | 89% | 7.4 m/s | 0.5 |
| 2007 | 8.9°C | 7.7°C | 6.4°C | 12.2°C | 4.3°C | 122 mm | 87% | 8.5 m/s | 0.6 |
| 2006 | 8.0°C | 7.1°C | 6.1°C | 11.5°C | 3.3°C | 64 mm | 86% | 6 m/s | 0.6 |
| 2005 | 8.9°C | 7.5°C | 6.1°C | 11.6°C | 3.2°C | 94 mm | 87% | 8.7 m/s | 0.6 |
| 2004 | 7.9°C | 6.8°C | 5.6°C | 10.7°C | 2.4°C | 157 mm | 89% | 6.9 m/s | 0.5 |
| 2003 | 7.7°C | 6.5°C | 5.2°C | 11.6°C | 1.4°C | 103 mm | 85% | 7.3 m/s | 0.7 |
| 2002 | 8.9°C | 7.6°C | 6.2°C | 11.3°C | 3.4°C | 122 mm | 89% | 7.4 m/s | 0.6 |
| 2001 | 6.4°C | 5.5°C | 4.5°C | 9.7°C | 2.5°C | 71 mm | 88% | 6.1 m/s | 0.7 |
| 2000 | 7.9°C | 6.7°C | 5.6°C | 10.2°C | 3.8°C | 83 mm | 88% | 7 m/s | 0.7 |
| 1999 | 7.6°C | 6.3°C | 4.9°C | 10.6°C | 2.5°C | 153 mm | 89% | 7.2 m/s | 0.6 |
| 1998 | 7.8°C | 6.7°C | 5.5°C | 11.5°C | 2.6°C | 140 mm | 87% | 6.5 m/s | 0.5 |
| 1997 | 6.5°C | 5.6°C | 4.6°C | 10.1°C | 1.2°C | 34 mm | 87% | 4.8 m/s | 0.6 |
| 1996 | 7.4°C | 6.5°C | 5.6°C | 10.6°C | 1.7°C | 127 mm | 89% | 8.2 m/s | 0.5 |
| 1995 | 7.2°C | 5.7°C | 4.2°C | 10.7°C | 1.8°C | 135 mm | 86% | 7.9 m/s | 0.6 |
| 1994 | 7.1°C | 5.7°C | 4.4°C | 9.3°C | 2.9°C | 130 mm | 88% | 7.7 m/s | 0.6 |
| 1993 | 8.2°C | 6.4°C | 4.6°C | 11.6°C | 1.5°C | 139 mm | 87% | 9.1 m/s | 0.6 |
| 1992 | 7.6°C | 6.4°C | 5.3°C | 11.6°C | 1.8°C | 72 mm | 89% | 5.8 m/s | 0.6 |
| 1991 | 6.3°C | 5.1°C | 3.9°C | 11.1°C | 1.4°C | 86 mm | 87% | 7.3 m/s | 0.6 |
| 1990 | 8.7°C | 7.2°C | 5.8°C | 12.0°C | 3.1°C | 132 mm | 89% | 8.3 m/s | 0.6 |
| 1989 🔥 | 9.0°C | 7.7°C | 6.5°C | 11.6°C | 4.3°C | 100 mm | 89% | 7.9 m/s | 0.6 |
| 1988 | 7.1°C | 5.9°C | 4.7°C | 10.7°C | 1.5°C | 151 mm | 88% | 7.1 m/s | 0.6 |
| 1987 | 5.4°C | 4.3°C | 3.3°C | 9.5°C | -1.9°C | 47 mm | 85% | 5.9 m/s | 0.5 |
| 1986 | 6.3°C | 5.1°C | 3.9°C | 10.8°C | 2.0°C | 128 mm | 85% | 8.3 m/s | 0.5 |
| 1985 ❄️ | 4.9°C | 3.9°C | 3.0°C | 9.3°C | 0.1°C | 63 mm | 82% | 5.4 m/s | 0.6 |
| 1984 | 6.2°C | 4.7°C | 3.3°C | 11.2°C | 0.6°C | 156 mm | 85% | 8.4 m/s | 0.5 |
| 1983 | 8.2°C | 6.6°C | 5.0°C | 11.9°C | 0.7°C | 105 mm | 88% | 9.2 m/s | — |
| 1982 | 6.2°C | 5.2°C | 4.1°C | 10.1°C | -1.1°C | 104 mm | 88% | 6.6 m/s | — |
| 1981 | 7.9°C | 6.6°C | 5.2°C | 10.8°C | 2.1°C | 103 mm | 87% | 7.6 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 7.4°C with lows near 5.1°C (mean 6.3°C), based on 45 years of NASA POWER data.
January averages 107 mm of rainfall in Larne, a relatively wet time of year. The wettest on record was 174 mm in 2008.
The hottest January reached 12.6°C in 2015. The coldest dipped to -1.9°C in 1987.
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 6.7°C to 7.7°C and overnight lows from 4.1°C to 5.5°C over the same span.
January is one of the cooler months of the year in Larne and a relatively wet time of year, so plan for around 7.4°C daytime highs and 5.1°C at night.
Not quite — January is the 2nd coolest month in Larne, averaging 6.3°C.
For January in Larne, pack warm layers and a jacket for chilly mornings, with typical highs of 7.4°C and lows of 5.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 87% — quite humid.
Average wind speed in January is 7.1 m/s. The windiest January on record averaged 9.2 m/s (1983).
The wettest January on record was 2008 with 174 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 Larne 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.
