December is one of the cooler months of the year in Kilwinning, with average highs near 7.1°C and lows around 4.3°C (mean 5.7°C). It is a relatively wet time of year, averaging 135 mm of rainfall and 90% relative humidity across the period.
December is one of the cooler months of the year in Kilwinning. Across 45 years of records, the warmest December in Kilwinning was 2015 — when the month averaged 7.7°C — while the coldest was 1981 at 2.2°C. Typical December days reach 7.1°C with nights near 4.3°C. The long-term trend is warming, about 0.3°C per decade.
December is a relatively wet time of year in Kilwinning, averaging 135 mm of rainfall. The wettest December on record was 2015 with 247 mm, while the driest was 1995 at 45 mm.
Relative humidity in Kilwinning during December averages 90%. The most humid December was 1997 at 92%, and the least humid were 1990 and 2014 at 88%.
December receives about 0.4 kWh/m²/day of solar energy in Kilwinning. The sunniest December was 2010 at 0.5 kWh/m²/day, and the cloudiest were 2019, 2021 and 2023, among others at 0.3.
Average wind speed in Kilwinning during December is 5.6 m/s. The windiest December was 2013 at 7.7 m/s, while the calmest was 2010 at 3.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 5.4°C | 5.2°C | 5.8°C | 6.0°C | 6.3°C | +0.9°C |
| Avg High | 6.8°C | 6.6°C | 7.2°C | 7.5°C | 7.7°C | +0.9°C |
| Avg Low | 4.0°C | 3.8°C | 4.4°C | 4.6°C | 5.0°C | +1°C |
| Avg Rain | 129 mm | 141 mm | 121 mm | 147 mm | 137 mm | +8 mm |
December temperatures in Kilwinning have risen by about 1.3°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -4.2°C (1995) to a record high of 12.9°C (2025).
Rainfall in December is a relatively wet time of year, averaging 135 mm, with a wettest year of 247 mm.
A quieter season to visit Kilwinning
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Kilwinning. That said, December — with days averaging 7.1°C and nights around 4.3°C (mean 5.7°C) and higher rainfall (135 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 | 8.1°C | 6.8°C | 5.5°C | 12.9°C | 1.4°C | 135 mm | 92% | 5.3 m/s | — |
| 2024 | 8.9°C | 7.4°C | 5.9°C | 12.2°C | 1.3°C | 131 mm | 91% | 6 m/s | 0.4 |
| 2023 | 8.0°C | 6.7°C | 5.4°C | 11.4°C | 1.4°C | 179 mm | 91% | 6.3 m/s | 0.3 |
| 2022 | 6.3°C | 5.0°C | 3.6°C | 12.3°C | 0.1°C | 111 mm | 90% | 5 m/s | 0.4 |
| 2021 | 7.6°C | 6.3°C | 4.9°C | 11.2°C | 2.1°C | 136 mm | 92% | 5 m/s | 0.3 |
| 2020 | 7.1°C | 5.8°C | 4.6°C | 11.2°C | 1.3°C | 130 mm | 91% | 5.3 m/s | 0.4 |
| 2019 | 7.8°C | 6.5°C | 5.3°C | 11.9°C | 2.3°C | 143 mm | 91% | 5.8 m/s | 0.3 |
| 2018 | 8.0°C | 6.7°C | 5.3°C | 10.9°C | 1.9°C | 123 mm | 92% | 5.3 m/s | 0.4 |
| 2017 | 7.2°C | 5.7°C | 4.3°C | 11.7°C | -0.3°C | 121 mm | 91% | 5 m/s | 0.4 |
| 2016 | 8.8°C | 7.4°C | 5.9°C | 12.5°C | 2.1°C | 89 mm | 91% | 5.7 m/s | 0.3 |
| 2015 🔥 🌧️ | 9.5°C | 7.7°C | 5.8°C | 12.2°C | 2.8°C | 247 mm | 90% | 7.3 m/s | 0.3 |
| 2014 | 7.3°C | 6.0°C | 4.8°C | 10.9°C | 1.7°C | 152 mm | 88% | 6 m/s | 0.4 |
| 2013 | 8.5°C | 7.0°C | 5.5°C | 11.5°C | 1.9°C | 159 mm | 89% | 7.7 m/s | 0.3 |
| 2012 | 6.4°C | 4.9°C | 3.4°C | 10.6°C | 0.8°C | 187 mm | 91% | 5.6 m/s | 0.4 |
| 2011 | 7.5°C | 6.1°C | 4.7°C | 11.1°C | 1.7°C | 205 mm | 89% | 7.1 m/s | 0.3 |
| 2010 | 3.7°C | 2.3°C | 0.8°C | 8.4°C | -3.0°C | 47 mm | 89% | 3.8 m/s | 0.5 |
| 2009 | 5.4°C | 4.0°C | 2.6°C | 10.6°C | -1.1°C | 84 mm | 90% | 4.3 m/s | 0.4 |
| 2008 | 6.4°C | 5.0°C | 3.5°C | 10.8°C | 0.6°C | 103 mm | 90% | 4.7 m/s | 0.4 |
| 2007 | 7.9°C | 6.4°C | 4.9°C | 12.2°C | 1.3°C | 117 mm | 90% | 5.9 m/s | 0.4 |
| 2006 | 8.6°C | 7.0°C | 5.4°C | 12.3°C | 2.9°C | 198 mm | 90% | 6.3 m/s | 0.4 |
| 2005 | 7.6°C | 6.2°C | 4.8°C | 10.9°C | 0.3°C | 99 mm | 91% | 4.8 m/s | 0.4 |
| 2004 | 8.3°C | 6.9°C | 5.6°C | 11.0°C | 0.3°C | 130 mm | 90% | 6.1 m/s | 0.4 |
| 2003 | 7.7°C | 6.1°C | 4.5°C | 11.0°C | 0.0°C | 133 mm | 90% | 5.2 m/s | 0.4 |
| 2002 | 6.3°C | 5.2°C | 4.0°C | 10.6°C | 1.5°C | 79 mm | 92% | 4.8 m/s | 0.4 |
| 2001 | 6.9°C | 5.2°C | 3.6°C | 11.6°C | 0.1°C | 86 mm | 89% | 5.1 m/s | 0.4 |
| 2000 | 6.9°C | 5.8°C | 4.8°C | 11.1°C | -0.5°C | 186 mm | 91% | 5.7 m/s | 0.3 |
| 1999 | 6.5°C | 5.0°C | 3.5°C | 10.9°C | 0.2°C | 232 mm | 88% | 6.4 m/s | 0.3 |
| 1998 | 8.1°C | 6.4°C | 4.8°C | 11.6°C | 0.6°C | 122 mm | 90% | 6.1 m/s | 0.3 |
| 1997 | 7.7°C | 6.3°C | 5.0°C | 11.5°C | 0.9°C | 151 mm | 92% | 5.7 m/s | 0.3 |
| 1996 | 5.1°C | 4.0°C | 2.8°C | 9.4°C | 0.0°C | 82 mm | 91% | 4.9 m/s | 0.4 |
| 1995 | 4.3°C | 3.0°C | 1.7°C | 11.8°C | -4.2°C | 45 mm | 91% | 4.8 m/s | 0.3 |
| 1994 | 7.8°C | 6.3°C | 4.9°C | 12.6°C | 1.0°C | 201 mm | 89% | 6.6 m/s | 0.3 |
| 1993 | 6.3°C | 4.8°C | 3.3°C | 10.5°C | -0.1°C | 212 mm | 89% | 6.4 m/s | 0.3 |
| 1992 | 6.3°C | 5.0°C | 3.7°C | 9.3°C | 1.3°C | 113 mm | 91% | 5.2 m/s | 0.4 |
| 1991 | 7.8°C | 6.4°C | 4.9°C | 11.1°C | 2.1°C | 115 mm | 91% | 5.4 m/s | 0.4 |
| 1990 | 6.5°C | 5.0°C | 3.5°C | 10.4°C | -0.2°C | 132 mm | 88% | 5.9 m/s | 0.3 |
| 1989 | 5.7°C | 4.4°C | 3.1°C | 10.9°C | 0.7°C | 76 mm | 91% | 4.7 m/s | 0.4 |
| 1988 | 8.9°C | 7.6°C | 6.3°C | 11.0°C | 1.3°C | 98 mm | 91% | 6.4 m/s | 0.3 |
| 1987 | 7.1°C | 5.8°C | 4.5°C | 10.9°C | 0.4°C | 105 mm | 92% | 5.2 m/s | 0.3 |
| 1986 | 7.3°C | 5.6°C | 4.0°C | 11.2°C | 0.8°C | 231 mm | 89% | 6.4 m/s | 0.3 |
| 1985 | 7.3°C | 6.0°C | 4.7°C | 12.2°C | -2.4°C | 144 mm | 90% | 5.6 m/s | 0.3 |
| 1984 | 7.3°C | 5.8°C | 4.4°C | 10.5°C | 0.5°C | 134 mm | 91% | 5.4 m/s | 0.3 |
| 1983 | 7.8°C | 6.4°C | 4.9°C | 11.0°C | 1.5°C | 148 mm | 90% | 6.3 m/s | — |
| 1982 | 6.4°C | 4.9°C | 3.4°C | 10.4°C | 0.4°C | 167 mm | 89% | 5.9 m/s | — |
| 1981 ❄️ | 3.5°C | 2.2°C | 0.9°C | 10.1°C | -2.9°C | 56 mm | 88% | 4.8 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 7.1°C with lows near 4.3°C (mean 5.7°C), based on 45 years of NASA POWER data.
December averages 135 mm of rainfall in Kilwinning, a relatively wet time of year. The wettest on record was 247 mm in 2015.
The hottest December reached 12.9°C in 2025. The coldest dipped to -4.2°C in 1995.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.3°C. Daytime highs moved from 6.5°C to 7.8°C and overnight lows from 3.7°C to 5.1°C over the same span.
December is one of the cooler months of the year in Kilwinning and a relatively wet time of year, so plan for around 7.1°C daytime highs and 4.3°C at night.
Not quite — December is the 4th coolest month in Kilwinning, averaging 5.7°C.
For December in Kilwinning, pack warm layers and a jacket for chilly mornings, with typical highs of 7.1°C and lows of 4.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 90% — quite humid.
Average wind speed in December is 5.6 m/s. The windiest December on record averaged 7.7 m/s (2013).
The wettest December on record was 2015 with 247 mm. On average, December sees 135 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 Kilwinning 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.
