December is one of the cooler months of the year in Dungannon, with average highs near 6.4°C and lows around 2.3°C (mean 4.4°C). It is about average for rainfall, averaging 98 mm of rainfall and 95% relative humidity across the period.
December is one of the cooler months of the year in Dungannon. Across 45 years of records, the warmest Decembers in Dungannon were 1988 and 2015 — when the month averaged 6.5°C — while the coldest was 2010 at 0°C. Typical December days reach 6.4°C with nights near 2.3°C. The long-term trend is warming, about 0.3°C per decade.
December is about average for rainfall in Dungannon, averaging 98 mm of rainfall. The wettest December on record was 2015 with 185 mm, while the driest was 2010 at 46 mm.
Relative humidity in Dungannon during December averages 95%. The most humid Decembers were 2000, 2018 and 2025, among others at 96%, and the least humid was 1995 at 94%.
December receives about 0.4 kWh/m²/day of solar energy in Dungannon. The sunniest Decembers were 2019, 2020 and 2022, among others at 0.5 kWh/m²/day, and the cloudiest were 2021, 2023 and 2024, among others at 0.4.
Average wind speed in Dungannon during December is 3.8 m/s. The windiest December was 2013 at 5.1 m/s, while the calmest was 2010 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 4.2°C | 3.9°C | 4.4°C | 4.5°C | 5.1°C | +0.9°C |
| Avg High | 6.2°C | 6.0°C | 6.4°C | 6.6°C | 7.0°C | +0.8°C |
| Avg Low | 2.1°C | 1.9°C | 2.4°C | 2.3°C | 3.2°C | +1.1°C |
| Avg Rain | 95 mm | 97 mm | 93 mm | 102 mm | 109 mm | +13 mm |
December temperatures in Dungannon have risen by about 1.6°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -7.9°C (1981) to a record high of 13.5°C (2025).
Rainfall in December is about average for rainfall, averaging 98 mm, with a wettest year of 185 mm.
A quieter season to visit Dungannon
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Dungannon. That said, December — with days averaging 6.4°C and nights around 2.3°C (mean 4.4°C) and higher rainfall (98 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 | 7.4°C | 5.5°C | 3.6°C | 13.5°C | -2.1°C | 105 mm | 96% | 3.6 m/s | — |
| 2024 | 8.3°C | 6.0°C | 3.8°C | 11.8°C | -1.0°C | 89 mm | 94% | 4.1 m/s | 0.4 |
| 2023 | 7.7°C | 6.1°C | 4.5°C | 11.4°C | -1.0°C | 141 mm | 95% | 4.5 m/s | 0.4 |
| 2022 | 5.0°C | 3.1°C | 1.1°C | 12.1°C | -2.6°C | 94 mm | 96% | 3.1 m/s | 0.5 |
| 2021 | 7.6°C | 5.7°C | 3.9°C | 11.6°C | 0.4°C | 122 mm | 96% | 3.5 m/s | 0.4 |
| 2020 | 6.1°C | 4.3°C | 2.5°C | 10.5°C | -1.0°C | 101 mm | 96% | 3.7 m/s | 0.5 |
| 2019 | 6.7°C | 4.7°C | 2.7°C | 11.9°C | -1.5°C | 97 mm | 96% | 3.9 m/s | 0.5 |
| 2018 | 7.9°C | 6.1°C | 4.2°C | 11.1°C | 0.0°C | 107 mm | 96% | 3.8 m/s | 0.4 |
| 2017 | 6.4°C | 4.3°C | 2.3°C | 12.1°C | -2.8°C | 92 mm | 96% | 3.4 m/s | 0.4 |
| 2016 | 7.4°C | 5.3°C | 3.2°C | 13.4°C | -1.4°C | 72 mm | 96% | 3.6 m/s | 0.5 |
| 2015 🌧️ | 9.2°C | 6.5°C | 3.7°C | 13.2°C | -1.0°C | 185 mm | 95% | 5 m/s | 0.4 |
| 2014 | 6.0°C | 4.0°C | 2.1°C | 11.2°C | -1.6°C | 94 mm | 95% | 3.9 m/s | 0.5 |
| 2013 | 7.5°C | 5.2°C | 2.9°C | 12.8°C | -0.6°C | 93 mm | 95% | 5.1 m/s | 0.4 |
| 2012 | 6.0°C | 3.9°C | 1.8°C | 11.2°C | -1.4°C | 126 mm | 96% | 3.6 m/s | 0.5 |
| 2011 | 6.7°C | 4.7°C | 2.8°C | 11.5°C | -0.7°C | 109 mm | 94% | 4.9 m/s | 0.4 |
| 2010 ❄️ | 2.1°C | 0.0°C | -2.2°C | 7.6°C | -6.6°C | 46 mm | 96% | 2.1 m/s | 0.5 |
| 2009 | 4.3°C | 2.5°C | 0.6°C | 9.5°C | -2.5°C | 66 mm | 96% | 3 m/s | 0.5 |
| 2008 | 5.6°C | 3.3°C | 1.1°C | 10.6°C | -2.2°C | 70 mm | 96% | 3 m/s | 0.5 |
| 2007 | 7.4°C | 5.1°C | 2.7°C | 12.6°C | -1.4°C | 105 mm | 95% | 4.1 m/s | 0.4 |
| 2006 | 7.5°C | 5.6°C | 3.8°C | 11.5°C | 0.9°C | 123 mm | 95% | 4.4 m/s | 0.4 |
| 2005 | 7.0°C | 5.0°C | 3.0°C | 10.6°C | -1.8°C | 87 mm | 96% | 3 m/s | 0.4 |
| 2004 | 7.5°C | 5.4°C | 3.4°C | 10.9°C | -2.1°C | 81 mm | 95% | 4.2 m/s | 0.4 |
| 2003 | 6.9°C | 4.7°C | 2.5°C | 11.0°C | -2.4°C | 97 mm | 95% | 3.4 m/s | 0.4 |
| 2002 | 6.0°C | 4.5°C | 3.1°C | 10.7°C | -1.1°C | 92 mm | 95% | 3.2 m/s | 0.4 |
| 2001 | 6.0°C | 3.7°C | 1.4°C | 10.7°C | -3.3°C | 65 mm | 95% | 3.2 m/s | 0.5 |
| 2000 | 6.0°C | 4.4°C | 2.8°C | 10.9°C | -3.7°C | 142 mm | 96% | 3.8 m/s | 0.4 |
| 1999 | 5.9°C | 3.8°C | 1.7°C | 11.0°C | -2.1°C | 156 mm | 94% | 4.5 m/s | 0.4 |
| 1998 | 7.5°C | 5.1°C | 2.7°C | 11.9°C | -2.0°C | 99 mm | 95% | 4.2 m/s | 0.4 |
| 1997 | 7.1°C | 5.4°C | 3.7°C | 11.2°C | -1.8°C | 116 mm | 96% | 4.1 m/s | 0.4 |
| 1996 | 4.5°C | 2.7°C | 0.9°C | 9.6°C | -2.2°C | 51 mm | 95% | 3 m/s | 0.5 |
| 1995 | 4.3°C | 2.3°C | 0.3°C | 11.6°C | -5.2°C | 56 mm | 94% | 2.9 m/s | 0.4 |
| 1994 | 7.3°C | 5.3°C | 3.3°C | 13.0°C | -1.2°C | 118 mm | 95% | 4.7 m/s | 0.4 |
| 1993 | 5.8°C | 3.7°C | 1.6°C | 11.3°C | -2.5°C | 144 mm | 95% | 4.5 m/s | 0.4 |
| 1992 | 5.2°C | 3.2°C | 1.3°C | 9.1°C | -2.7°C | 79 mm | 96% | 3.4 m/s | 0.5 |
| 1991 | 6.9°C | 4.9°C | 2.9°C | 11.5°C | -2.1°C | 60 mm | 95% | 3.7 m/s | 0.5 |
| 1990 | 5.2°C | 2.8°C | 0.4°C | 10.8°C | -2.1°C | 89 mm | 94% | 3.8 m/s | 0.4 |
| 1989 | 5.3°C | 3.3°C | 1.3°C | 10.2°C | -1.6°C | 75 mm | 95% | 3 m/s | 0.5 |
| 1988 🔥 | 8.5°C | 6.5°C | 4.6°C | 11.3°C | -0.2°C | 65 mm | 95% | 4.2 m/s | 0.4 |
| 1987 | 7.0°C | 5.2°C | 3.4°C | 11.7°C | -2.1°C | 69 mm | 95% | 3.6 m/s | 0.4 |
| 1986 | 6.6°C | 4.1°C | 1.6°C | 11.3°C | -1.4°C | 136 mm | 95% | 4.5 m/s | 0.4 |
| 1985 | 6.8°C | 5.0°C | 3.2°C | 12.9°C | -3.8°C | 92 mm | 95% | 3.9 m/s | 0.4 |
| 1984 | 6.2°C | 4.2°C | 2.2°C | 10.7°C | -2.1°C | 105 mm | 96% | 3.4 m/s | 0.4 |
| 1983 | 7.3°C | 5.3°C | 3.3°C | 10.7°C | -1.0°C | 123 mm | 95% | 4.2 m/s | — |
| 1982 | 5.3°C | 3.0°C | 0.8°C | 10.5°C | -2.0°C | 122 mm | 95% | 4 m/s | — |
| 1981 | 3.0°C | 1.0°C | -1.1°C | 10.2°C | -7.9°C | 71 mm | 95% | 3 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 6.4°C with lows near 2.3°C (mean 4.4°C), based on 45 years of NASA POWER data.
December averages 98 mm of rainfall in Dungannon, about average for rainfall. The wettest on record was 185 mm in 2015.
The hottest December reached 13.5°C in 2025. The coldest dipped to -7.9°C in 1981.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.6°C. Daytime highs moved from 5.7°C to 7.2°C and overnight lows from 1.7°C to 3.4°C over the same span.
December is one of the cooler months of the year in Dungannon and about average for rainfall, so plan for around 6.4°C daytime highs and 2.3°C at night.
Not quite — December is the 3rd coolest month in Dungannon, averaging 4.4°C.
For December in Dungannon, pack warm layers and a jacket for chilly mornings, with typical highs of 6.4°C and lows of 2.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 95% — quite humid.
Average wind speed in December is 3.8 m/s. The windiest December on record averaged 5.1 m/s (2013).
The wettest December on record was 2015 with 185 mm. On average, December sees 98 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 Dungannon behaves each December, 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 December specifically, along with year-by-year records and how the month has changed over the decades.
