December is one of the cooler months of the year in ‘Unayzah, with average highs near 22.3°C and lows around 8.8°C (mean 15.6°C). It is about average for rainfall, averaging 10 mm of rainfall and 44% relative humidity across the period.
December is one of the cooler months of the year in ‘Unayzah. Across 45 years of records, the warmest December in ‘Unayzah was 2001 — when the month averaged 19.3°C — while the coldest was 2006 at 11.3°C. Typical December days reach 22.3°C with nights near 8.8°C. The long-term trend is warming, about 0.2°C per decade.
December is about average for rainfall in ‘Unayzah, averaging 10 mm of rainfall. The wettest December on record was 2025 with 149 mm, while the driest were 2014, 2018 and 2019, among others at 0 mm.
Relative humidity in ‘Unayzah during December averages 44%. The most humid December was 1995 at 64%, and the least humid was 2008 at 30%.
December receives about 3.7 kWh/m²/day of solar energy in ‘Unayzah. The sunniest December was 2008 at 4.3 kWh/m²/day, and the cloudiest was 1995 at 2.9.
Average wind speed in ‘Unayzah during December is 2.8 m/s. The windiest Decembers were 1986 and 2007 at 3.3 m/s, while the calmest were 2005 and 2017 at 2.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.0°C | 15.7°C | 15.5°C | 15.4°C | 16.3°C | +1.3°C |
| Avg High | 21.7°C | 22.5°C | 22.2°C | 22.3°C | 22.8°C | +1.1°C |
| Avg Low | 8.3°C | 8.9°C | 8.8°C | 8.5°C | 9.9°C | +1.6°C |
| Avg Rain | 5 mm | 7 mm | 8 mm | 8 mm | 32 mm | +27 mm |
December temperatures in ‘Unayzah have risen by about 1.5°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -2.2°C (2006) to a record high of 30.2°C (2021).
Rainfall in December is about average for rainfall, averaging 10 mm, with a wettest year of 149 mm.
A good time to visit ‘Unayzah
December is a good time to visit ‘Unayzah, with days averaging 22.3°C and nights around 8.8°C (mean 15.6°C, cooler than ‘Unayzah's yearly average) and low rainfall. November and March are marginally more temperate, but December still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 🌧️ | 20.9°C | 14.8°C | 8.6°C | 26.9°C | 0.9°C | 149 mm | 53% | 2.5 m/s | — |
| 2024 | 22.7°C | 15.6°C | 8.4°C | 29.7°C | 0.6°C | 3 mm | 43% | 2.7 m/s | 4 |
| 2023 | 24.6°C | 17.6°C | 10.6°C | 27.9°C | 5.1°C | 22 mm | 42% | 2.6 m/s | 3.8 |
| 2022 | 22.9°C | 16.8°C | 10.8°C | 29.4°C | 2.8°C | 4 mm | 51% | 2.7 m/s | 3.4 |
| 2021 | 23.2°C | 17.0°C | 10.7°C | 30.2°C | 7.2°C | 3 mm | 41% | 2.8 m/s | 3.4 |
| 2020 | 22.2°C | 16.3°C | 10.3°C | 26.4°C | 6.0°C | 10 mm | 50% | 2.9 m/s | 3.5 |
| 2019 | 23.6°C | 16.2°C | 8.8°C | 29.8°C | 3.4°C | 0 mm | 40% | 2.7 m/s | 4.2 |
| 2018 | 23.7°C | 17.3°C | 11.0°C | 28.7°C | 4.9°C | 0 mm | 49% | 3 m/s | 3.7 |
| 2017 | 21.6°C | 14.3°C | 7.0°C | 28.6°C | 0.1°C | 8 mm | 34% | 2.4 m/s | 4.1 |
| 2016 | 22.4°C | 15.8°C | 9.2°C | 28.9°C | 3.3°C | 50 mm | 52% | 3 m/s | 3.8 |
| 2015 | 20.2°C | 14.0°C | 7.8°C | 29.6°C | 0.3°C | 5 mm | 50% | 3.1 m/s | 3.5 |
| 2014 | 23.3°C | 16.6°C | 9.9°C | 28.3°C | 5.1°C | 0 mm | 46% | 2.6 m/s | 3.9 |
| 2013 | 21.6°C | 14.5°C | 7.5°C | 29.4°C | -0.2°C | 0 mm | 42% | 2.9 m/s | 4.1 |
| 2012 | 22.8°C | 16.6°C | 10.3°C | 29.0°C | 4.2°C | 15 mm | 50% | 3.1 m/s | 3.7 |
| 2011 | 21.4°C | 13.8°C | 6.3°C | 27.5°C | 2.4°C | 0 mm | 31% | 2.5 m/s | 4.2 |
| 2010 | 22.6°C | 15.1°C | 7.6°C | 27.4°C | 1.6°C | 2 mm | 31% | 2.5 m/s | 4.1 |
| 2009 | 22.4°C | 15.9°C | 9.4°C | 27.5°C | 5.8°C | 1 mm | 47% | 2.5 m/s | 3.8 |
| 2008 | 21.8°C | 14.1°C | 6.4°C | 27.4°C | 0.9°C | 0 mm | 30% | 2.5 m/s | 4.3 |
| 2007 | 23.7°C | 16.9°C | 10.0°C | 29.2°C | 1.0°C | 0 mm | 37% | 3.3 m/s | 3.8 |
| 2006 ❄️ | 18.1°C | 11.3°C | 4.4°C | 23.7°C | -2.2°C | 1 mm | 46% | 2.7 m/s | 4 |
| 2005 | 24.3°C | 17.4°C | 10.5°C | 28.8°C | 3.1°C | 2 mm | 32% | 2.4 m/s | 4 |
| 2004 | 19.1°C | 12.7°C | 6.4°C | 27.1°C | 0.0°C | 3 mm | 50% | 2.9 m/s | 3.9 |
| 2003 | 22.4°C | 16.2°C | 10.0°C | 27.8°C | 4.4°C | 54 mm | 56% | 3.2 m/s | 3.7 |
| 2002 | 22.0°C | 15.4°C | 8.8°C | 29.8°C | 1.3°C | 14 mm | 48% | 3.1 m/s | 3.7 |
| 2001 🔥 | 25.4°C | 19.3°C | 13.3°C | 29.3°C | 8.4°C | 5 mm | 44% | 3.2 m/s | 3.6 |
| 2000 | 22.7°C | 15.6°C | 8.5°C | 28.3°C | 3.3°C | 3 mm | 43% | 2.7 m/s | 4.2 |
| 1999 | 22.4°C | 15.0°C | 7.5°C | 28.8°C | 3.0°C | 0 mm | 38% | 2.6 m/s | 4 |
| 1998 | 26.3°C | 18.5°C | 10.8°C | 29.6°C | 6.6°C | 0 mm | 33% | 2.6 m/s | 4.1 |
| 1997 | 21.4°C | 15.3°C | 9.2°C | 28.3°C | 3.0°C | 3 mm | 55% | 3 m/s | 3.2 |
| 1996 | 23.7°C | 16.8°C | 9.9°C | 27.2°C | 5.6°C | 2 mm | 40% | 2.9 m/s | 3.6 |
| 1995 | 19.4°C | 14.2°C | 9.0°C | 27.2°C | 4.2°C | 43 mm | 64% | 2.9 m/s | 2.9 |
| 1994 | 19.7°C | 13.4°C | 7.1°C | 27.5°C | -0.7°C | 17 mm | 45% | 3.1 m/s | 3.5 |
| 1993 | 24.7°C | 17.2°C | 9.7°C | 28.7°C | 4.9°C | 0 mm | 37% | 2.7 m/s | 3.8 |
| 1992 | 20.2°C | 14.0°C | 7.8°C | 28.5°C | 3.1°C | 4 mm | 51% | 3.1 m/s | 3.4 |
| 1991 | 21.6°C | 15.0°C | 8.4°C | 29.3°C | 0.6°C | 0 mm | 42% | 2.8 m/s | 3.8 |
| 1990 | 25.3°C | 17.3°C | 9.4°C | 28.7°C | 1.0°C | 0 mm | 32% | 2.7 m/s | 3.7 |
| 1989 | 21.0°C | 14.4°C | 7.9°C | 29.3°C | 3.5°C | 4 mm | 45% | 2.5 m/s | 3.5 |
| 1988 | 23.1°C | 16.3°C | 9.4°C | 28.8°C | 0.2°C | 0 mm | 36% | 2.7 m/s | 3.5 |
| 1987 | 23.0°C | 16.3°C | 9.6°C | 28.1°C | 1.7°C | 0 mm | 39% | 3 m/s | 3.5 |
| 1986 | 20.3°C | 13.4°C | 6.6°C | 26.1°C | -0.8°C | 12 mm | 49% | 3.3 m/s | 3.6 |
| 1985 | 21.4°C | 14.8°C | 8.2°C | 28.1°C | 2.0°C | 7 mm | 47% | 2.5 m/s | 3.3 |
| 1984 | 20.6°C | 14.4°C | 8.2°C | 28.0°C | 3.1°C | 7 mm | 52% | 3.2 m/s | 3.3 |
| 1983 | 22.1°C | 15.4°C | 8.6°C | 28.7°C | 2.6°C | 0 mm | 39% | 3.1 m/s | — |
| 1982 | 19.1°C | 12.5°C | 5.9°C | 27.1°C | 0.3°C | 15 mm | 54% | 3.1 m/s | — |
| 1981 | 25.0°C | 17.5°C | 9.9°C | 28.7°C | 5.6°C | 2 mm | 34% | 3.1 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 22.3°C with lows near 8.8°C (mean 15.6°C), based on 45 years of NASA POWER data.
December averages 10 mm of rainfall in ‘Unayzah, about average for rainfall. The wettest on record was 149 mm in 2025.
The hottest December reached 30.2°C in 2021. The coldest dipped to -2.2°C in 2006.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.5°C. Daytime highs moved from 21.6°C to 22.9°C and overnight lows from 8.2°C to 9.8°C over the same span.
December is one of the cooler months of the year in ‘Unayzah and about average for rainfall, so plan for around 22.3°C daytime highs and 8.8°C at night.
Not quite — December is the 2nd coolest month in ‘Unayzah, averaging 15.6°C.
For December in ‘Unayzah, pack light layers you can adjust through the day, with typical highs of 22.3°C and lows of 8.8°C.
Relative humidity in December averages 44% — relatively dry.
Average wind speed in December is 2.8 m/s. The windiest December on record averaged 3.3 m/s (1986).
The wettest December on record was 2025 with 149 mm. On average, December sees 10 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 ‘Unayzah 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.
