December is one of the cooler months of the year in Cookeville, with average highs near 9.1°C and lows around -0.7°C (mean 4.2°C). It is a relatively wet time of year, averaging 132 mm of rainfall and 84% relative humidity across the period.
December is one of the cooler months of the year in Cookeville. Across 45 years of records, the warmest December in Cookeville was 2015 — when the month averaged 10.3°C — while the coldest was 1989 at -2.4°C. Typical December days reach 9.1°C with nights near -0.7°C. The long-term trend is warming, about 0.7°C per decade.
December is a relatively wet time of year in Cookeville, averaging 132 mm of rainfall. The wettest December on record was 1990 with 368 mm, while the driest was 1985 at 46 mm.
Relative humidity in Cookeville during December averages 84%. The most humid December was 1984 at 89%, and the least humid was 1999 at 74%.
December receives about 1.9 kWh/m²/day of solar energy in Cookeville. The sunniest Decembers were 1989, 2001 and 2006, among others at 2.2 kWh/m²/day, and the cloudiest was 1992 at 1.4.
Average wind speed in Cookeville during December is 0.4 m/s. The windiest Decembers were 2021, 2024 and 2025, among others at 0.5 m/s, while the calmest were 2019, 2022 and 2023, among others at 0.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 2.7°C | 4.4°C | 3.6°C | 5.1°C | 5.9°C | +3.2°C |
| Avg High | 7.5°C | 9.3°C | 8.6°C | 9.8°C | 11.1°C | +3.6°C |
| Avg Low | -2.0°C | -0.6°C | -1.5°C | 0.4°C | 0.7°C | +2.7°C |
| Avg Rain | 116 mm | 152 mm | 120 mm | 151 mm | 115 mm | -1 mm |
December temperatures in Cookeville have risen by about 3.3°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -20.9°C (1989) to a record high of 23.4°C (1998).
Rainfall in December is a relatively wet time of year, averaging 132 mm, with a wettest year of 368 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.8°C per decade while lows rose 0.6°C per decade, widening the gap between day and night.
A quieter season to visit Cookeville
If your dates are flexible, the more temperate months of September and June tend to be the most comfortable for visiting Cookeville. That said, December — with days averaging 9.1°C and nights around -0.7°C (mean 4.2°C) and higher rainfall (132 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 | 10.1°C | 5.0°C | -0.1°C | 21.9°C | -9.3°C | 63 mm | 79% | 0.5 m/s | — |
| 2024 | 11.0°C | 5.8°C | 0.7°C | 18.7°C | -7.3°C | 127 mm | 77% | 0.5 m/s | 1.9 |
| 2023 | 12.4°C | 6.8°C | 1.2°C | 19.7°C | -6.7°C | 97 mm | 75% | 0.4 m/s | 2 |
| 2022 | 9.2°C | 4.2°C | -0.8°C | 20.4°C | -16.4°C | 159 mm | 84% | 0.4 m/s | 1.9 |
| 2021 | 15.5°C | 10.0°C | 4.5°C | 21.1°C | -4.7°C | 130 mm | 85% | 0.5 m/s | 2 |
| 2020 | 8.7°C | 3.6°C | -1.6°C | 17.0°C | -9.1°C | 116 mm | 84% | 0.5 m/s | 1.9 |
| 2019 | 12.1°C | 7.3°C | 2.4°C | 20.0°C | -5.9°C | 154 mm | 86% | 0.4 m/s | 1.9 |
| 2018 | 9.1°C | 5.0°C | 0.8°C | 18.5°C | -6.2°C | 202 mm | 89% | 0.4 m/s | 1.7 |
| 2017 | 8.5°C | 3.5°C | -1.5°C | 18.0°C | -10.7°C | 110 mm | 78% | 0.4 m/s | 1.9 |
| 2016 | 9.4°C | 4.2°C | -1.0°C | 21.3°C | -12.1°C | 198 mm | 82% | 0.5 m/s | 1.9 |
| 2015 🔥 | 14.8°C | 10.3°C | 5.7°C | 22.5°C | -4.7°C | 197 mm | 88% | 0.4 m/s | 1.9 |
| 2014 | 9.3°C | 5.0°C | 0.8°C | 17.2°C | -4.6°C | 132 mm | 88% | 0.4 m/s | 1.6 |
| 2013 | 8.9°C | 4.1°C | -0.7°C | 20.7°C | -7.3°C | 168 mm | 85% | 0.4 m/s | 1.8 |
| 2012 | 12.0°C | 7.0°C | 2.1°C | 21.1°C | -6.5°C | 148 mm | 83% | 0.5 m/s | 1.8 |
| 2011 | 10.5°C | 5.5°C | 0.6°C | 18.1°C | -5.6°C | 143 mm | 86% | 0.4 m/s | 2 |
| 2010 | 3.1°C | -1.0°C | -5.2°C | 13.4°C | -13.9°C | 55 mm | 83% | 0.5 m/s | 1.8 |
| 2009 | 7.2°C | 2.6°C | -1.9°C | 16.8°C | -6.7°C | 141 mm | 86% | 0.5 m/s | 1.8 |
| 2008 | 8.8°C | 3.5°C | -1.9°C | 19.1°C | -11.4°C | 190 mm | 83% | 0.5 m/s | 1.8 |
| 2007 | 11.9°C | 6.9°C | 2.0°C | 22.4°C | -5.1°C | 86 mm | 83% | 0.4 m/s | 1.8 |
| 2006 | 12.1°C | 6.2°C | 0.4°C | 19.2°C | -8.1°C | 76 mm | 82% | 0.4 m/s | 2.2 |
| 2005 | 6.8°C | 1.7°C | -3.4°C | 15.2°C | -8.0°C | 76 mm | 82% | 0.4 m/s | 1.9 |
| 2004 | 8.6°C | 3.5°C | -1.5°C | 19.3°C | -11.6°C | 153 mm | 84% | 0.5 m/s | 2.1 |
| 2003 | 7.8°C | 2.7°C | -2.3°C | 13.5°C | -6.7°C | 94 mm | 82% | 0.5 m/s | 2 |
| 2002 | 7.0°C | 2.9°C | -1.3°C | 14.2°C | -12.1°C | 167 mm | 89% | 0.5 m/s | 1.9 |
| 2001 | 11.3°C | 6.3°C | 1.2°C | 20.6°C | -9.8°C | 107 mm | 81% | 0.4 m/s | 2.2 |
| 2000 | 4.3°C | -0.8°C | -6.0°C | 17.2°C | -12.3°C | 106 mm | 81% | 0.4 m/s | 2 |
| 1999 | 11.0°C | 5.2°C | -0.6°C | 19.4°C | -7.0°C | 64 mm | 74% | 0.4 m/s | 2 |
| 1998 | 10.7°C | 5.7°C | 0.7°C | 23.4°C | -11.0°C | 174 mm | 83% | 0.4 m/s | 1.9 |
| 1997 | 7.6°C | 3.1°C | -1.4°C | 15.3°C | -8.7°C | 76 mm | 87% | 0.4 m/s | 1.7 |
| 1996 | 10.1°C | 5.0°C | -0.1°C | 19.4°C | -10.8°C | 124 mm | 85% | 0.5 m/s | 1.9 |
| 1995 | 6.4°C | 1.7°C | -3.0°C | 18.8°C | -13.9°C | 77 mm | 84% | 0.4 m/s | 1.9 |
| 1994 | 11.2°C | 6.1°C | 1.0°C | 18.2°C | -5.0°C | 72 mm | 86% | 0.4 m/s | 1.7 |
| 1993 | 7.2°C | 2.9°C | -1.4°C | 15.3°C | -10.7°C | 190 mm | 86% | 0.4 m/s | 1.7 |
| 1992 | 7.7°C | 3.3°C | -1.0°C | 16.2°C | -6.8°C | 123 mm | 87% | 0.4 m/s | 1.4 |
| 1991 | 10.0°C | 5.2°C | 0.3°C | 21.3°C | -7.0°C | 252 mm | 86% | 0.4 m/s | 2 |
| 1990 🌧️ | 10.8°C | 5.4°C | -0.1°C | 20.2°C | -9.9°C | 368 mm | 85% | 0.5 m/s | 1.8 |
| 1989 ❄️ | 2.2°C | -2.4°C | -6.9°C | 14.9°C | -20.9°C | 73 mm | 84% | 0.5 m/s | 2.2 |
| 1988 | 8.6°C | 3.3°C | -1.9°C | 17.0°C | -8.0°C | 131 mm | 81% | 0.5 m/s | 2.2 |
| 1987 | 10.4°C | 5.1°C | -0.3°C | 17.9°C | -5.9°C | 146 mm | 80% | 0.5 m/s | 1.7 |
| 1986 | 7.5°C | 3.0°C | -1.5°C | 16.7°C | -5.9°C | 119 mm | 88% | 0.4 m/s | 1.7 |
| 1985 | 4.9°C | 0.0°C | -5.0°C | 17.7°C | -14.1°C | 46 mm | 80% | 0.4 m/s | 2.1 |
| 1984 | 12.6°C | 8.1°C | 3.5°C | 20.5°C | -10.8°C | 86 mm | 89% | 0.4 m/s | 1.7 |
| 1983 | 4.7°C | 0.1°C | -4.4°C | 18.4°C | -20.2°C | 186 mm | 86% | 0.5 m/s | — |
| 1982 | 11.0°C | 6.7°C | 2.5°C | 21.7°C | -7.6°C | 172 mm | 87% | 0.5 m/s | — |
| 1981 | 5.5°C | 0.8°C | -3.8°C | 14.7°C | -12.4°C | 88 mm | 82% | 0.4 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 9.1°C with lows near -0.7°C (mean 4.2°C), based on 45 years of NASA POWER data.
December averages 132 mm of rainfall in Cookeville, a relatively wet time of year. The wettest on record was 368 mm in 1990.
The hottest December reached 23.4°C in 1998. The coldest dipped to -20.9°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 3.3°C. Daytime highs moved from 7.7°C to 11.6°C and overnight lows from -1.4°C to 1.1°C over the same span.
December is one of the cooler months of the year in Cookeville and a relatively wet time of year, so plan for around 9.1°C daytime highs and -0.7°C at night.
Not quite — December is the 2nd coolest month in Cookeville, averaging 4.2°C.
For December in Cookeville, pack warm layers and a jacket for chilly mornings, with typical highs of 9.1°C and lows of -0.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 84% — quite humid.
Average wind speed in December is 0.4 m/s. The windiest December on record averaged 0.5 m/s (1982).
The wettest December on record was 1990 with 368 mm. On average, December sees 132 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 Cookeville 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.
