December is one of the cooler months of the year in Carlisle, with average highs near 5.4°C and lows around 1.6°C (mean 3.5°C). It is a relatively wet time of year, averaging 108 mm of rainfall and 96% relative humidity across the period.
December is one of the cooler months of the year in Carlisle. Across 45 years of records, the warmest December in Carlisle was 2015 — when the month averaged 6.4°C — while the coldest was 1981 at -1.3°C. Typical December days reach 5.4°C with nights near 1.6°C. The long-term trend is warming, about 0.4°C per decade.
December is a relatively wet time of year in Carlisle, averaging 108 mm of rainfall. The wettest December on record was 2015 with 266 mm, while the driest was 2010 at 34 mm.
Relative humidity in Carlisle during December averages 96%. The most humid December was 2010 at 98%, and the least humid was 2013 at 94%.
December receives about 0.4 kWh/m²/day of solar energy in Carlisle. The sunniest Decembers were 2014, 2017 and 2022, among others at 0.5 kWh/m²/day, and the cloudiest was 1988 at 0.3.
Average wind speed in Carlisle during December is 4 m/s. The windiest Decembers were 2013 and 2015 at 5.7 m/s, while the calmest was 2010 at 2.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 3.3°C | 3.0°C | 3.4°C | 3.8°C | 4.3°C | +1°C |
| Avg High | 5.1°C | 4.9°C | 5.4°C | 5.8°C | 6.1°C | +1°C |
| Avg Low | 1.4°C | 1.1°C | 1.4°C | 1.9°C | 2.5°C | +1.1°C |
| Avg Rain | 100 mm | 110 mm | 98 mm | 116 mm | 124 mm | +24 mm |
December temperatures in Carlisle have risen by about 1.7°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -11.1°C (1995) to a record high of 12.4°C (2015).
Rainfall in December is a relatively wet time of year, averaging 108 mm, with a wettest year of 266 mm.
A quieter season to visit Carlisle
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Carlisle. That said, December — with days averaging 5.4°C and nights around 1.6°C (mean 3.5°C) and higher rainfall (108 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 | 7.0°C | 5.4°C | 3.9°C | 12.4°C | -2.3°C | 123 mm | 96% | 4.1 m/s | — |
| 2024 | 7.5°C | 5.5°C | 3.5°C | 11.2°C | -1.5°C | 113 mm | 96% | 4.6 m/s | 0.4 |
| 2023 | 6.5°C | 4.8°C | 3.0°C | 10.6°C | -1.9°C | 170 mm | 96% | 4.8 m/s | 0.4 |
| 2022 | 4.3°C | 2.4°C | 0.5°C | 10.8°C | -5.2°C | 91 mm | 96% | 3.4 m/s | 0.5 |
| 2021 | 6.0°C | 4.1°C | 2.2°C | 10.7°C | -1.6°C | 114 mm | 96% | 3.4 m/s | 0.4 |
| 2020 | 5.3°C | 3.7°C | 2.0°C | 10.7°C | -2.6°C | 133 mm | 96% | 3.7 m/s | 0.4 |
| 2019 | 6.0°C | 4.4°C | 2.8°C | 11.0°C | -1.9°C | 89 mm | 96% | 4.2 m/s | 0.4 |
| 2018 | 6.4°C | 4.6°C | 2.9°C | 10.2°C | -1.9°C | 101 mm | 97% | 3.6 m/s | 0.4 |
| 2017 | 5.1°C | 3.2°C | 1.3°C | 11.1°C | -4.4°C | 87 mm | 97% | 3.6 m/s | 0.5 |
| 2016 | 7.0°C | 5.3°C | 3.5°C | 11.3°C | -1.6°C | 64 mm | 96% | 4 m/s | 0.4 |
| 2015 🔥 🌧️ | 8.7°C | 6.4°C | 4.2°C | 12.4°C | -1.8°C | 266 mm | 94% | 5.7 m/s | 0.4 |
| 2014 | 5.5°C | 3.6°C | 1.7°C | 10.3°C | -1.9°C | 96 mm | 96% | 4.3 m/s | 0.5 |
| 2013 | 7.1°C | 5.0°C | 2.9°C | 10.3°C | -2.2°C | 130 mm | 94% | 5.7 m/s | 0.4 |
| 2012 | 4.6°C | 2.7°C | 0.9°C | 9.5°C | -3.0°C | 158 mm | 96% | 4 m/s | 0.4 |
| 2011 | 6.1°C | 4.1°C | 2.0°C | 10.4°C | -1.8°C | 132 mm | 95% | 5.2 m/s | 0.4 |
| 2010 | 1.0°C | -1.2°C | -3.4°C | 5.8°C | -7.3°C | 34 mm | 98% | 2.4 m/s | 0.5 |
| 2009 | 3.5°C | 1.6°C | -0.3°C | 8.9°C | -5.0°C | 92 mm | 96% | 3 m/s | 0.5 |
| 2008 | 4.6°C | 2.7°C | 0.7°C | 9.9°C | -3.1°C | 78 mm | 96% | 3.3 m/s | 0.5 |
| 2007 | 5.6°C | 3.6°C | 1.5°C | 11.5°C | -2.8°C | 111 mm | 96% | 4.1 m/s | 0.5 |
| 2006 | 7.0°C | 5.1°C | 3.1°C | 11.0°C | -0.5°C | 156 mm | 95% | 4.6 m/s | 0.4 |
| 2005 | 5.8°C | 3.7°C | 1.7°C | 10.2°C | -2.2°C | 56 mm | 97% | 3.2 m/s | 0.5 |
| 2004 | 6.7°C | 4.7°C | 2.6°C | 10.0°C | -2.0°C | 87 mm | 96% | 4.2 m/s | 0.4 |
| 2003 | 5.8°C | 3.4°C | 1.1°C | 10.2°C | -5.6°C | 110 mm | 97% | 3.6 m/s | 0.4 |
| 2002 | 4.8°C | 3.2°C | 1.6°C | 9.5°C | -1.7°C | 101 mm | 96% | 3.3 m/s | 0.4 |
| 2001 | 4.9°C | 2.5°C | 0.0°C | 10.6°C | -4.5°C | 71 mm | 95% | 3.3 m/s | 0.5 |
| 2000 | 5.1°C | 3.8°C | 2.5°C | 10.9°C | -3.9°C | 118 mm | 96% | 4.3 m/s | 0.4 |
| 1999 | 4.6°C | 2.6°C | 0.6°C | 9.8°C | -5.4°C | 147 mm | 96% | 4.7 m/s | 0.4 |
| 1998 | 6.4°C | 4.4°C | 2.3°C | 11.0°C | -2.8°C | 94 mm | 96% | 4.4 m/s | 0.4 |
| 1997 | 6.2°C | 4.5°C | 2.9°C | 10.4°C | -1.7°C | 131 mm | 96% | 4.1 m/s | 0.4 |
| 1996 | 3.4°C | 1.9°C | 0.4°C | 8.2°C | -2.5°C | 81 mm | 96% | 3.5 m/s | 0.4 |
| 1995 | 2.5°C | 0.6°C | -1.2°C | 9.4°C | -11.1°C | 45 mm | 96% | 3.2 m/s | 0.4 |
| 1994 | 6.4°C | 4.5°C | 2.6°C | 11.8°C | -2.2°C | 140 mm | 95% | 5 m/s | 0.4 |
| 1993 | 4.6°C | 2.7°C | 0.8°C | 10.2°C | -4.2°C | 158 mm | 96% | 4.7 m/s | 0.4 |
| 1992 | 4.1°C | 2.3°C | 0.5°C | 8.7°C | -5.4°C | 89 mm | 96% | 3.6 m/s | 0.4 |
| 1991 | 5.7°C | 3.8°C | 1.9°C | 10.3°C | -3.1°C | 75 mm | 96% | 3.7 m/s | 0.4 |
| 1990 | 4.6°C | 2.6°C | 0.6°C | 9.3°C | -2.7°C | 141 mm | 94% | 4.4 m/s | 0.4 |
| 1989 | 3.9°C | 2.2°C | 0.5°C | 9.0°C | -3.0°C | 70 mm | 96% | 3.1 m/s | 0.4 |
| 1988 | 7.6°C | 5.8°C | 3.9°C | 10.1°C | -0.8°C | 74 mm | 96% | 4.7 m/s | 0.3 |
| 1987 | 5.7°C | 4.0°C | 2.4°C | 10.5°C | -3.5°C | 90 mm | 95% | 3.8 m/s | 0.4 |
| 1986 | 5.9°C | 3.7°C | 1.6°C | 11.4°C | -2.4°C | 175 mm | 95% | 4.9 m/s | 0.4 |
| 1985 | 6.0°C | 4.3°C | 2.6°C | 11.9°C | -6.6°C | 129 mm | 95% | 4.2 m/s | 0.4 |
| 1984 | 5.7°C | 3.9°C | 2.1°C | 9.5°C | -3.0°C | 87 mm | 96% | 3.9 m/s | 0.4 |
| 1983 | 6.3°C | 4.3°C | 2.3°C | 10.0°C | -2.9°C | 117 mm | 95% | 4.6 m/s | — |
| 1982 | 4.4°C | 2.4°C | 0.4°C | 9.6°C | -3.1°C | 118 mm | 96% | 4.1 m/s | — |
| 1981 ❄️ | 0.6°C | -1.3°C | -3.3°C | 8.8°C | -9.1°C | 41 mm | 96% | 3 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 5.4°C with lows near 1.6°C (mean 3.5°C), based on 45 years of NASA POWER data.
December averages 108 mm of rainfall in Carlisle, a relatively wet time of year. The wettest on record was 266 mm in 2015.
The hottest December reached 12.4°C in 2015. The coldest dipped to -11.1°C in 1995.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.7°C. Daytime highs moved from 4.6°C to 6.3°C and overnight lows from 0.8°C to 2.6°C over the same span.
December is one of the cooler months of the year in Carlisle and a relatively wet time of year, so plan for around 5.4°C daytime highs and 1.6°C at night.
Not quite — December is the 3rd coolest month in Carlisle, averaging 3.5°C.
For December in Carlisle, pack warm layers and a jacket for chilly mornings, with typical highs of 5.4°C and lows of 1.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 96% — quite humid.
Average wind speed in December is 4 m/s. The windiest December on record averaged 5.7 m/s (2013).
The wettest December on record was 2015 with 266 mm. On average, December sees 108 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 Carlisle 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.
