December is one of the warmer months of the year in Glencoe, with average highs near 18.9°C and lows around 7.4°C (mean 13.2°C). It is a relatively wet time of year, averaging 110 mm of rainfall and 74% relative humidity across the period.
December is one of the warmer months of the year in Glencoe. Across 45 years of records, the warmest December in Glencoe was 2005 — when the month averaged 16.3°C — while the coldest was 2004 at 9.7°C. Typical December days reach 18.9°C with nights near 7.4°C. The long-term trend is warming, about 0.3°C per decade.
December is a relatively wet time of year in Glencoe, averaging 110 mm of rainfall. The wettest December on record was 2004 with 212 mm, while the driest was 2011 at 35 mm.
Relative humidity in Glencoe during December averages 74%. The most humid December was 2004 at 80%, and the least humid was 2011 at 70%.
December receives about 6.1 kWh/m²/day of solar energy in Glencoe. The sunniest December was 2011 at 6.8 kWh/m²/day, and the cloudiest was 1984 at 5.3.
Average wind speed in Glencoe during December is 3.3 m/s. The windiest December was 1990 at 4.4 m/s, while the calmest was 2011 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.1°C | 12.4°C | 12.9°C | 13.9°C | 13.9°C | +0.8°C |
| Avg High | 18.7°C | 18.1°C | 18.4°C | 19.9°C | 19.6°C | +0.9°C |
| Avg Low | 7.6°C | 6.7°C | 7.3°C | 7.9°C | 8.1°C | +0.5°C |
| Avg Rain | 130 mm | 112 mm | 117 mm | 92 mm | 94 mm | -36 mm |
December temperatures in Glencoe have risen by about 1.2°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 0.7°C (2009) to a record high of 29.8°C (2022).
Rainfall in December is a relatively wet time of year, averaging 110 mm, with a wettest year of 212 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.4°C per decade while lows rose 0.2°C per decade, widening the gap between day and night.
One of the best times to visit Glencoe
December is one of the best times to visit Glencoe. Expect days averaging 18.9°C and nights around 7.4°C (mean 13.2°C) — warmer than Glencoe's yearly average — with higher rainfall (110 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 17.9°C | 12.7°C | 7.4°C | 24.6°C | 3.0°C | 111 mm | 73% | 3.2 m/s | — |
| 2024 | 20.8°C | 15.1°C | 9.4°C | 29.5°C | 2.0°C | 111 mm | 75% | 3.2 m/s | 5.7 |
| 2023 | 20.1°C | 14.2°C | 8.3°C | 28.2°C | 2.2°C | 100 mm | 73% | 3.5 m/s | 6 |
| 2022 | 20.8°C | 14.7°C | 8.6°C | 29.8°C | 2.9°C | 54 mm | 74% | 2.7 m/s | 6 |
| 2021 | 19.5°C | 13.6°C | 7.7°C | 24.7°C | 3.9°C | 93 mm | 75% | 3.4 m/s | 6.4 |
| 2020 | 18.8°C | 13.1°C | 7.4°C | 27.5°C | 2.4°C | 96 mm | 74% | 3.6 m/s | 6.1 |
| 2019 | 17.5°C | 12.3°C | 7.1°C | 27.4°C | 4.9°C | 142 mm | 75% | 3.6 m/s | 5.4 |
| 2018 | 20.9°C | 14.9°C | 8.8°C | 26.9°C | 3.4°C | 57 mm | 72% | 3 m/s | 6.6 |
| 2017 | 21.6°C | 15.8°C | 10.0°C | 29.2°C | 5.3°C | 98 mm | 71% | 2.8 m/s | 6.3 |
| 2016 | 18.7°C | 12.7°C | 6.7°C | 27.8°C | 1.9°C | 64 mm | 72% | 3.8 m/s | 6.2 |
| 2015 | 19.1°C | 13.0°C | 6.9°C | 29.0°C | 3.0°C | 76 mm | 73% | 3.8 m/s | 6.4 |
| 2014 | 20.7°C | 14.2°C | 7.8°C | 28.7°C | 1.9°C | 79 mm | 72% | 2.7 m/s | 6.3 |
| 2013 | 19.3°C | 13.7°C | 8.1°C | 28.9°C | 4.4°C | 133 mm | 75% | 2.9 m/s | 5.8 |
| 2012 | 19.5°C | 13.3°C | 7.0°C | 28.9°C | 3.6°C | 117 mm | 73% | 3.2 m/s | 6.3 |
| 2011 | 21.9°C | 15.3°C | 8.6°C | 27.5°C | 4.3°C | 35 mm | 70% | 2.5 m/s | 6.8 |
| 2010 | 19.6°C | 13.9°C | 8.1°C | 25.9°C | 2.2°C | 123 mm | 73% | 3.6 m/s | 5.7 |
| 2009 | 17.8°C | 12.0°C | 6.2°C | 23.2°C | 0.7°C | 133 mm | 74% | 3.7 m/s | 5.8 |
| 2008 | 18.4°C | 12.6°C | 6.8°C | 26.4°C | 2.5°C | 106 mm | 74% | 2.9 m/s | 5.8 |
| 2007 | 19.8°C | 13.6°C | 7.4°C | 26.6°C | 3.0°C | 100 mm | 74% | 2.8 m/s | 6.2 |
| 2006 | 16.5°C | 11.2°C | 5.8°C | 23.8°C | 2.6°C | 106 mm | 75% | 3 m/s | 5.6 |
| 2005 🔥 | 21.9°C | 16.3°C | 10.7°C | 28.1°C | 6.0°C | 118 mm | 74% | 2.8 m/s | 5.9 |
| 2004 ❄️ 🌧️ | 14.1°C | 9.7°C | 5.3°C | 23.3°C | 3.0°C | 212 mm | 80% | 3.9 m/s | 5.4 |
| 2003 | 18.6°C | 12.7°C | 6.8°C | 25.6°C | 2.0°C | 78 mm | 72% | 3.8 m/s | 6.5 |
| 2002 | 18.5°C | 13.0°C | 7.5°C | 26.2°C | 2.7°C | 114 mm | 74% | 3.6 m/s | 6.1 |
| 2001 | 19.2°C | 13.7°C | 8.2°C | 26.7°C | 1.2°C | 99 mm | 76% | 2.9 m/s | 5.7 |
| 2000 | 19.6°C | 13.7°C | 7.9°C | 25.8°C | 3.0°C | 100 mm | 71% | 3.6 m/s | 6.1 |
| 1999 | 17.6°C | 12.0°C | 6.4°C | 25.2°C | 2.7°C | 61 mm | 74% | 3.2 m/s | 6.1 |
| 1998 | 18.9°C | 13.4°C | 7.9°C | 26.2°C | 3.3°C | 109 mm | 76% | 3.2 m/s | 5.8 |
| 1997 | 16.5°C | 11.0°C | 5.5°C | 26.3°C | 2.5°C | 138 mm | 73% | 4 m/s | 6 |
| 1996 | 17.7°C | 12.1°C | 6.5°C | 24.9°C | 3.2°C | 80 mm | 72% | 3.4 m/s | 6.1 |
| 1995 | 18.3°C | 12.8°C | 7.3°C | 24.6°C | 2.3°C | 172 mm | 77% | 3.2 m/s | 5.6 |
| 1994 | 18.0°C | 12.2°C | 6.3°C | 26.5°C | 3.3°C | 111 mm | 72% | 3.9 m/s | 6.7 |
| 1993 | 18.6°C | 12.8°C | 7.0°C | 26.3°C | 1.2°C | 133 mm | 75% | 3 m/s | 5.8 |
| 1992 | 18.1°C | 12.0°C | 5.9°C | 26.0°C | 2.2°C | 111 mm | 74% | 3 m/s | 5.9 |
| 1991 | 19.1°C | 12.8°C | 6.6°C | 26.2°C | 3.0°C | 55 mm | 74% | 3.1 m/s | 6.6 |
| 1990 | 18.0°C | 12.6°C | 7.2°C | 24.5°C | 2.3°C | 149 mm | 73% | 4.4 m/s | 6.4 |
| 1989 | 18.1°C | 12.5°C | 6.9°C | 26.0°C | 3.4°C | 154 mm | 71% | 3.8 m/s | 6.4 |
| 1988 | 20.8°C | 14.8°C | 8.8°C | 28.5°C | 4.8°C | 122 mm | 71% | 3.5 m/s | 6.5 |
| 1987 | 17.4°C | 12.2°C | 7.1°C | 26.6°C | 4.2°C | 92 mm | 74% | 3.5 m/s | 5.7 |
| 1986 | 20.3°C | 14.3°C | 8.3°C | 26.3°C | 3.9°C | 107 mm | 72% | 2.9 m/s | 6.3 |
| 1985 | 20.0°C | 14.2°C | 8.3°C | 26.3°C | 1.6°C | 78 mm | 73% | 2.7 m/s | 6.3 |
| 1984 | 19.6°C | 13.9°C | 8.2°C | 27.4°C | 3.9°C | 131 mm | 73% | 2.6 m/s | 5.3 |
| 1983 | 16.2°C | 11.1°C | 5.9°C | 28.2°C | 2.7°C | 197 mm | 77% | 3.7 m/s | — |
| 1982 | 16.2°C | 11.0°C | 5.8°C | 24.3°C | 1.2°C | 129 mm | 75% | 3.8 m/s | — |
| 1981 | 19.6°C | 14.1°C | 8.7°C | 26.0°C | 4.3°C | 160 mm | 76% | 3.1 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 18.9°C with lows near 7.4°C (mean 13.2°C), based on 45 years of NASA POWER data.
December averages 110 mm of rainfall in Glencoe, a relatively wet time of year. The wettest on record was 212 mm in 2004.
The hottest December reached 29.8°C in 2022. The coldest dipped to 0.7°C in 2009.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.2°C. Daytime highs moved from 18.3°C to 19.8°C and overnight lows from 7.4°C to 8.3°C over the same span.
December is one of the warmer months of the year in Glencoe and a relatively wet time of year, so plan for around 18.9°C daytime highs and 7.4°C at night.
Not quite — December is the 10th coolest month in Glencoe, averaging 13.2°C.
For December in Glencoe, pack warm layers and a jacket for chilly mornings, with typical highs of 18.9°C and lows of 7.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 74% — moderately humid.
Average wind speed in December is 3.3 m/s. The windiest December on record averaged 4.4 m/s (1990).
The wettest December on record was 2004 with 212 mm. On average, December sees 110 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 Glencoe 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.
