December is one of the cooler months of the year in Omagh, with average highs near 6.5°C and lows around 2.5°C (mean 4.5°C). It is a relatively wet time of year, averaging 112 mm of rainfall and 95% relative humidity across the period.
December is one of the cooler months of the year in Omagh. Across 45 years of records, the warmest December in Omagh was 1988 — when the month averaged 6.8°C — while the coldest was 2010 at 0.1°C. Typical December days reach 6.5°C with nights near 2.5°C. The long-term trend is warming, about 0.3°C per decade.
December is a relatively wet time of year in Omagh, averaging 112 mm of rainfall. The wettest December on record was 2015 with 210 mm, while the driest was 2010 at 50 mm.
Relative humidity in Omagh during December averages 95%. The most humid December was 2025 at 96%, and the least humid was 2011 at 93%.
December receives about 0.4 kWh/m²/day of solar energy in Omagh. 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 Omagh during December is 3.9 m/s. The windiest December was 2013 at 5.2 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 | 4.3°C | 4.0°C | 4.5°C | 4.7°C | 5.2°C | +0.9°C |
| Avg High | 6.3°C | 6.1°C | 6.4°C | 6.7°C | 7.0°C | +0.7°C |
| Avg Low | 2.3°C | 2.0°C | 2.5°C | 2.6°C | 3.3°C | +1°C |
| Avg Rain | 109 mm | 114 mm | 105 mm | 118 mm | 118 mm | +9 mm |
December temperatures in Omagh have risen by about 1.6°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -7.4°C (1981) to a record high of 13.7°C (2025).
Rainfall in December is a relatively wet time of year, averaging 112 mm, with a wettest year of 210 mm.
A quieter season to visit Omagh
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Omagh. That said, December — with days averaging 6.5°C and nights around 2.5°C (mean 4.5°C) and higher rainfall (112 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 | 7.3°C | 5.5°C | 3.6°C | 13.7°C | -1.6°C | 102 mm | 96% | 3.7 m/s | — |
| 2024 | 8.3°C | 6.1°C | 3.9°C | 11.7°C | -1.0°C | 100 mm | 94% | 4.2 m/s | 0.4 |
| 2023 | 7.7°C | 6.1°C | 4.6°C | 11.4°C | -1.0°C | 158 mm | 95% | 4.5 m/s | 0.4 |
| 2022 | 5.1°C | 3.2°C | 1.2°C | 11.8°C | -2.2°C | 106 mm | 96% | 3.2 m/s | 0.5 |
| 2021 | 7.6°C | 5.9°C | 4.1°C | 11.6°C | 0.7°C | 124 mm | 96% | 3.7 m/s | 0.4 |
| 2020 | 6.1°C | 4.4°C | 2.6°C | 10.1°C | -1.0°C | 116 mm | 95% | 3.8 m/s | 0.5 |
| 2019 | 6.8°C | 4.8°C | 2.9°C | 12.0°C | -1.0°C | 114 mm | 96% | 4.1 m/s | 0.5 |
| 2018 | 8.0°C | 6.2°C | 4.3°C | 11.0°C | 0.6°C | 118 mm | 96% | 3.9 m/s | 0.4 |
| 2017 | 6.7°C | 4.6°C | 2.6°C | 12.1°C | -2.6°C | 108 mm | 95% | 3.5 m/s | 0.4 |
| 2016 | 7.5°C | 5.4°C | 3.4°C | 13.2°C | -0.6°C | 78 mm | 96% | 3.8 m/s | 0.5 |
| 2015 🌧️ | 9.2°C | 6.5°C | 3.9°C | 13.1°C | -0.3°C | 210 mm | 95% | 5.1 m/s | 0.4 |
| 2014 | 6.2°C | 4.4°C | 2.6°C | 11.2°C | -1.5°C | 116 mm | 94% | 4 m/s | 0.5 |
| 2013 | 7.6°C | 5.5°C | 3.3°C | 12.9°C | 0.1°C | 111 mm | 94% | 5.2 m/s | 0.4 |
| 2012 | 6.1°C | 4.0°C | 1.9°C | 11.3°C | -1.6°C | 136 mm | 96% | 3.7 m/s | 0.5 |
| 2011 | 6.9°C | 5.1°C | 3.3°C | 11.3°C | -0.2°C | 140 mm | 93% | 5 m/s | 0.4 |
| 2010 ❄️ | 2.2°C | 0.1°C | -2.0°C | 7.6°C | -6.4°C | 50 mm | 96% | 2.1 m/s | 0.5 |
| 2009 | 4.4°C | 2.5°C | 0.7°C | 9.3°C | -2.6°C | 72 mm | 95% | 3.1 m/s | 0.5 |
| 2008 | 5.8°C | 3.6°C | 1.3°C | 10.5°C | -2.2°C | 81 mm | 95% | 3.1 m/s | 0.5 |
| 2007 | 7.4°C | 5.2°C | 3.0°C | 12.5°C | -1.3°C | 127 mm | 95% | 4.4 m/s | 0.4 |
| 2006 | 7.5°C | 5.7°C | 4.0°C | 11.5°C | 0.6°C | 152 mm | 95% | 4.6 m/s | 0.4 |
| 2005 | 7.0°C | 5.1°C | 3.2°C | 10.9°C | -2.0°C | 94 mm | 96% | 3.1 m/s | 0.4 |
| 2004 | 7.6°C | 5.6°C | 3.7°C | 11.0°C | -2.5°C | 106 mm | 95% | 4.4 m/s | 0.4 |
| 2003 | 6.9°C | 4.7°C | 2.4°C | 11.0°C | -2.2°C | 109 mm | 95% | 3.4 m/s | 0.4 |
| 2002 | 5.9°C | 4.4°C | 2.9°C | 10.9°C | -1.4°C | 98 mm | 96% | 3.3 m/s | 0.4 |
| 2001 | 6.0°C | 3.7°C | 1.4°C | 10.3°C | -3.1°C | 74 mm | 95% | 3.3 m/s | 0.5 |
| 2000 | 5.9°C | 4.3°C | 2.7°C | 10.8°C | -3.8°C | 138 mm | 96% | 3.9 m/s | 0.4 |
| 1999 | 6.1°C | 4.1°C | 2.0°C | 10.9°C | -2.0°C | 194 mm | 94% | 4.5 m/s | 0.4 |
| 1998 | 7.7°C | 5.3°C | 2.9°C | 12.0°C | -1.9°C | 108 mm | 95% | 4.3 m/s | 0.4 |
| 1997 | 7.1°C | 5.4°C | 3.8°C | 11.1°C | -1.6°C | 131 mm | 96% | 4.2 m/s | 0.4 |
| 1996 | 4.5°C | 2.7°C | 0.9°C | 10.2°C | -2.6°C | 54 mm | 96% | 3.1 m/s | 0.5 |
| 1995 | 4.1°C | 2.1°C | 0.0°C | 11.6°C | -5.1°C | 56 mm | 95% | 3 m/s | 0.4 |
| 1994 | 7.5°C | 5.4°C | 3.4°C | 12.8°C | -1.2°C | 142 mm | 94% | 4.8 m/s | 0.4 |
| 1993 | 5.9°C | 3.8°C | 1.8°C | 11.0°C | -2.6°C | 176 mm | 94% | 4.6 m/s | 0.4 |
| 1992 | 5.3°C | 3.4°C | 1.5°C | 9.2°C | -2.7°C | 91 mm | 96% | 3.5 m/s | 0.5 |
| 1991 | 7.0°C | 5.1°C | 3.2°C | 11.4°C | -1.4°C | 75 mm | 96% | 3.9 m/s | 0.5 |
| 1990 | 5.4°C | 3.1°C | 0.8°C | 10.9°C | -2.0°C | 109 mm | 94% | 3.9 m/s | 0.4 |
| 1989 | 5.1°C | 3.1°C | 1.2°C | 9.9°C | -1.6°C | 80 mm | 96% | 3.2 m/s | 0.5 |
| 1988 🔥 | 8.6°C | 6.8°C | 4.9°C | 11.2°C | -0.4°C | 76 mm | 95% | 4.4 m/s | 0.4 |
| 1987 | 6.8°C | 5.1°C | 3.4°C | 11.6°C | -2.4°C | 79 mm | 96% | 3.9 m/s | 0.4 |
| 1986 | 6.7°C | 4.4°C | 2.0°C | 11.3°C | -0.6°C | 156 mm | 94% | 4.6 m/s | 0.4 |
| 1985 | 6.9°C | 5.1°C | 3.4°C | 12.8°C | -3.4°C | 111 mm | 95% | 4.1 m/s | 0.4 |
| 1984 | 6.4°C | 4.3°C | 2.3°C | 10.7°C | -1.6°C | 123 mm | 96% | 3.6 m/s | 0.4 |
| 1983 | 7.3°C | 5.4°C | 3.5°C | 10.9°C | -1.0°C | 138 mm | 95% | 4.4 m/s | — |
| 1982 | 5.6°C | 3.3°C | 1.0°C | 10.5°C | -2.1°C | 145 mm | 94% | 4.2 m/s | — |
| 1981 | 3.1°C | 1.0°C | -1.0°C | 10.2°C | -7.4°C | 72 mm | 95% | 3.1 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 6.5°C with lows near 2.5°C (mean 4.5°C), based on 45 years of NASA POWER data.
December averages 112 mm of rainfall in Omagh, a relatively wet time of year. The wettest on record was 210 mm in 2015.
The hottest December reached 13.7°C in 2025. The coldest dipped to -7.4°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 5.9°C to 7.2°C and overnight lows from 1.8°C to 3.5°C over the same span.
December is one of the cooler months of the year in Omagh and a relatively wet time of year, so plan for around 6.5°C daytime highs and 2.5°C at night.
Not quite — December is the 3rd coolest month in Omagh, averaging 4.5°C.
For December in Omagh, pack warm layers and a jacket for chilly mornings, with typical highs of 6.5°C and lows of 2.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 95% — quite humid.
Average wind speed in December is 3.9 m/s. The windiest December on record averaged 5.2 m/s (2013).
The wettest December on record was 2015 with 210 mm. On average, December sees 112 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 Omagh 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.
