January is one of the cooler months of the year in Antrim, with average highs near 6.2°C and lows around 2.4°C (mean 4.3°C). It is about average for rainfall, averaging 91 mm of rainfall and 94% relative humidity across the period.
January is one of the cooler months of the year in Antrim. Across 45 years of records, the warmest Januarys in Antrim were 1989 and 2005 — when the month averaged 6°C — while the coldest was 1985 at 1.2°C. Typical January days reach 6.2°C with nights near 2.4°C. The long-term trend is warming, about 0.2°C per decade.
January is about average for rainfall in Antrim, averaging 91 mm of rainfall. The wettest January on record was 2008 with 156 mm, while the driest was 1997 at 33 mm.
Relative humidity in Antrim during January averages 94%. The most humid January was 2020 at 95%, and the least humid was 1985 at 91%.
January receives about 0.6 kWh/m²/day of solar energy in Antrim. The sunniest January was 1985 at 0.9 kWh/m²/day, and the cloudiest were 1995, 2008 and 2013, among others at 0.5.
Average wind speed in Antrim during January is 4.7 m/s. The windiest January was 1983 at 6.4 m/s, while the calmest was 1997 at 3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 3.6°C | 4.4°C | 4.9°C | 4.1°C | 4.5°C | +0.9°C |
| Avg High | 5.5°C | 6.3°C | 6.8°C | 6.0°C | 6.4°C | +0.9°C |
| Avg Low | 1.7°C | 2.4°C | 3.0°C | 2.2°C | 2.6°C | +0.9°C |
| Avg Rain | 89 mm | 99 mm | 93 mm | 92 mm | 77 mm | -13 mm |
January temperatures in Antrim have risen by about 1°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -5.8°C (1982) to a record high of 12.5°C (2015).
Rainfall in January is about average for rainfall, averaging 91 mm, with a wettest year of 156 mm.
A quieter season to visit Antrim
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Antrim. That said, January — with days averaging 6.2°C and nights around 2.4°C (mean 4.3°C) and higher rainfall (91 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 | 6.2°C | 4.4°C | 2.7°C | 11.2°C | -0.9°C | 76 mm | 94% | 4 m/s | 0.7 |
| 2024 | 6.4°C | 4.5°C | 2.5°C | 12.0°C | -1.7°C | 75 mm | 93% | 4.4 m/s | 0.7 |
| 2023 | 6.9°C | 5.1°C | 3.3°C | 11.2°C | -1.3°C | 75 mm | 94% | 4.7 m/s | 0.7 |
| 2022 | 7.0°C | 4.9°C | 2.7°C | 11.8°C | -0.7°C | 41 mm | 94% | 4.2 m/s | 0.6 |
| 2021 | 4.8°C | 3.2°C | 1.5°C | 9.1°C | -1.3°C | 125 mm | 93% | 3.5 m/s | 0.7 |
| 2020 | 7.1°C | 5.1°C | 3.1°C | 12.3°C | -1.0°C | 67 mm | 95% | 5 m/s | 0.6 |
| 2019 | 6.3°C | 4.5°C | 2.6°C | 9.9°C | -1.8°C | 47 mm | 94% | 3.7 m/s | 0.6 |
| 2018 | 6.2°C | 4.4°C | 2.6°C | 11.5°C | -0.3°C | 136 mm | 95% | 5 m/s | 0.6 |
| 2017 | 6.7°C | 4.9°C | 3.1°C | 10.0°C | -0.5°C | 54 mm | 93% | 4 m/s | 0.6 |
| 2016 | 6.9°C | 4.8°C | 2.8°C | 11.9°C | -0.2°C | 141 mm | 94% | 4.8 m/s | 0.6 |
| 2015 | 6.0°C | 3.8°C | 1.7°C | 12.5°C | -0.9°C | 103 mm | 93% | 5.6 m/s | 0.6 |
| 2014 | 6.3°C | 4.5°C | 2.7°C | 9.7°C | -0.5°C | 109 mm | 95% | 4.6 m/s | 0.6 |
| 2013 | 6.0°C | 4.1°C | 2.3°C | 11.2°C | -1.7°C | 118 mm | 94% | 4.4 m/s | 0.5 |
| 2012 | 7.2°C | 5.0°C | 2.9°C | 10.9°C | 0.2°C | 88 mm | 93% | 5 m/s | 0.6 |
| 2011 | 4.6°C | 2.8°C | 1.0°C | 10.9°C | -2.0°C | 60 mm | 94% | 3.4 m/s | 0.7 |
| 2010 | 4.0°C | 2.3°C | 0.6°C | 8.6°C | -4.3°C | 69 mm | 93% | 3.9 m/s | 0.7 |
| 2009 | 5.5°C | 3.6°C | 1.7°C | 10.4°C | -1.3°C | 107 mm | 95% | 4.6 m/s | 0.6 |
| 2008 🌧️ | 7.1°C | 5.2°C | 3.2°C | 12.3°C | -1.2°C | 156 mm | 94% | 4.9 m/s | 0.5 |
| 2007 | 7.9°C | 5.9°C | 3.9°C | 11.8°C | 0.2°C | 93 mm | 93% | 5.8 m/s | 0.6 |
| 2006 | 6.9°C | 5.0°C | 3.1°C | 11.2°C | -0.2°C | 52 mm | 93% | 3.8 m/s | 0.6 |
| 2005 | 8.2°C | 6.0°C | 3.9°C | 11.9°C | -1.1°C | 79 mm | 93% | 6 m/s | 0.6 |
| 2004 | 6.8°C | 5.0°C | 3.1°C | 10.0°C | -1.5°C | 128 mm | 95% | 4.5 m/s | 0.6 |
| 2003 | 6.3°C | 4.5°C | 2.7°C | 12.2°C | -0.7°C | 91 mm | 92% | 4.9 m/s | 0.6 |
| 2002 | 7.9°C | 5.8°C | 3.7°C | 11.3°C | -2.3°C | 109 mm | 94% | 4.9 m/s | 0.6 |
| 2001 | 4.9°C | 3.2°C | 1.6°C | 8.3°C | -1.9°C | 60 mm | 94% | 3.7 m/s | 0.7 |
| 2000 | 6.7°C | 4.8°C | 2.8°C | 10.3°C | -0.2°C | 58 mm | 94% | 4.6 m/s | 0.7 |
| 1999 | 6.5°C | 4.5°C | 2.5°C | 10.4°C | -0.9°C | 121 mm | 95% | 4.8 m/s | 0.6 |
| 1998 | 6.5°C | 4.6°C | 2.7°C | 11.9°C | -1.5°C | 125 mm | 93% | 4.3 m/s | 0.6 |
| 1997 | 5.4°C | 3.7°C | 1.9°C | 10.5°C | -1.8°C | 33 mm | 93% | 3 m/s | 0.6 |
| 1996 | 6.5°C | 5.2°C | 4.0°C | 10.0°C | -1.0°C | 128 mm | 93% | 5.4 m/s | 0.6 |
| 1995 | 5.9°C | 3.8°C | 1.6°C | 10.8°C | -1.4°C | 116 mm | 93% | 5.2 m/s | 0.5 |
| 1994 | 6.1°C | 4.1°C | 2.0°C | 9.2°C | -0.3°C | 110 mm | 94% | 5.2 m/s | 0.6 |
| 1993 | 7.6°C | 4.9°C | 2.3°C | 11.8°C | -0.9°C | 113 mm | 91% | 6.3 m/s | 0.5 |
| 1992 | 6.2°C | 4.3°C | 2.4°C | 11.1°C | -1.8°C | 63 mm | 95% | 3.7 m/s | 0.6 |
| 1991 | 4.8°C | 2.9°C | 0.9°C | 10.9°C | -1.9°C | 83 mm | 93% | 4.7 m/s | 0.6 |
| 1990 | 7.6°C | 5.5°C | 3.4°C | 12.0°C | -0.2°C | 101 mm | 94% | 5.8 m/s | 0.6 |
| 1989 🔥 | 8.1°C | 6.0°C | 4.0°C | 11.6°C | -0.8°C | 76 mm | 94% | 5.5 m/s | 0.6 |
| 1988 | 5.7°C | 4.1°C | 2.5°C | 10.6°C | -0.6°C | 138 mm | 94% | 4.8 m/s | 0.6 |
| 1987 | 4.2°C | 2.5°C | 0.7°C | 9.1°C | -4.6°C | 45 mm | 91% | 3.6 m/s | 0.6 |
| 1986 | 4.9°C | 3.0°C | 1.2°C | 10.4°C | -2.2°C | 111 mm | 93% | 5.3 m/s | 0.5 |
| 1985 ❄️ | 3.0°C | 1.2°C | -0.6°C | 9.1°C | -4.1°C | 57 mm | 91% | 3.1 m/s | 0.9 |
| 1984 | 4.6°C | 2.5°C | 0.4°C | 10.8°C | -3.8°C | 133 mm | 92% | 5.5 m/s | 0.5 |
| 1983 | 7.3°C | 5.2°C | 3.0°C | 11.6°C | -0.9°C | 85 mm | 93% | 6.4 m/s | — |
| 1982 | 5.0°C | 3.3°C | 1.7°C | 10.7°C | -5.8°C | 89 mm | 93% | 4.6 m/s | — |
| 1981 | 6.9°C | 4.9°C | 2.8°C | 11.2°C | -1.6°C | 69 mm | 93% | 5 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 6.2°C with lows near 2.4°C (mean 4.3°C), based on 45 years of NASA POWER data.
January averages 91 mm of rainfall in Antrim, about average for rainfall. The wettest on record was 156 mm in 2008.
The hottest January reached 12.5°C in 2015. The coldest dipped to -5.8°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°C. Daytime highs moved from 5.4°C to 6.3°C and overnight lows from 1.5°C to 2.5°C over the same span.
January is one of the cooler months of the year in Antrim and about average for rainfall, so plan for around 6.2°C daytime highs and 2.4°C at night.
Yes — January is the coldest month of the year in Antrim, averaging 4.3°C.
For January in Antrim, pack warm layers and a jacket for chilly mornings, with typical highs of 6.2°C and lows of 2.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 94% — quite humid.
Average wind speed in January is 4.7 m/s. The windiest January on record averaged 6.4 m/s (1983).
The wettest January on record was 2008 with 156 mm. On average, January sees 91 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 Antrim 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.
