December is one of the cooler months of the year in Norman, with average highs near 10.4°C and lows around -0.8°C (mean 4.8°C). It is one of the drier months, averaging 50 mm of rainfall and 74% relative humidity across the period.
December is one of the cooler months of the year in Norman. Across 45 years of records, the warmest December in Norman was 2021 — when the month averaged 11.4°C — while the coldest was 1983 at -2.5°C. Typical December days reach 10.4°C with nights near -0.8°C. The long-term trend is warming, about 0.9°C per decade.
December is one of the drier months in Norman, averaging 50 mm of rainfall. The wettest December on record was 1984 with 204 mm, while the driest was 2025 at 4 mm.
Relative humidity in Norman during December averages 74%. The most humid December was 1986 at 85%, and the least humid was 2005 at 60%.
December receives about 2.4 kWh/m²/day of solar energy in Norman. The sunniest Decembers were 2004 and 2021 at 2.8 kWh/m²/day, and the cloudiest was 2014 at 1.7.
Average wind speed in Norman during December is 3.2 m/s. The windiest December was 2008 at 4.1 m/s, while the calmest was 1986 at 2.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 3.1°C | 4.8°C | 4.2°C | 5.3°C | 7.7°C | +4.6°C |
| Avg High | 8.5°C | 10.3°C | 9.9°C | 10.8°C | 13.7°C | +5.2°C |
| Avg Low | -2.3°C | -0.7°C | -1.6°C | -0.3°C | 1.6°C | +3.9°C |
| Avg Rain | 56 mm | 67 mm | 44 mm | 40 mm | 38 mm | -18 mm |
December temperatures in Norman have risen by about 5.2°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -20.9°C (1989) to a record high of 26.2°C (2025).
Rainfall in December is one of the drier months, averaging 50 mm, with a wettest year of 204 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 1°C per decade while lows rose 0.7°C per decade, widening the gap between day and night.
A quieter season to visit Norman
If your dates are flexible, the more temperate months of September and May tend to be the most comfortable for visiting Norman. That said, December — with days averaging 10.4°C and nights around -0.8°C (mean 4.8°C) and moderate rainfall (50 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 | 14.3°C | 7.9°C | 1.5°C | 26.2°C | -7.4°C | 4 mm | 68% | 3.4 m/s | — |
| 2024 | 13.6°C | 8.1°C | 2.6°C | 20.8°C | -4.1°C | 28 mm | 76% | 3 m/s | 2.4 |
| 2023 | 13.7°C | 7.6°C | 1.5°C | 20.5°C | -3.9°C | 54 mm | 70% | 3.2 m/s | 2.5 |
| 2022 | 10.8°C | 5.4°C | 0.0°C | 21.7°C | -14.7°C | 55 mm | 71% | 3.3 m/s | 2.4 |
| 2021 🔥 | 18.1°C | 11.4°C | 4.7°C | 26.0°C | -6.6°C | 12 mm | 61% | 3.3 m/s | 2.8 |
| 2020 | 11.9°C | 5.5°C | -0.9°C | 19.8°C | -6.6°C | 73 mm | 70% | 3.1 m/s | 2.6 |
| 2019 | 12.6°C | 6.7°C | 0.7°C | 19.1°C | -5.0°C | 23 mm | 73% | 3 m/s | 2.5 |
| 2018 | 9.9°C | 5.0°C | 0.1°C | 16.7°C | -5.6°C | 106 mm | 80% | 3.2 m/s | 2.3 |
| 2017 | 10.6°C | 5.1°C | -0.4°C | 24.3°C | -10.4°C | 23 mm | 66% | 3.1 m/s | 2.4 |
| 2016 | 10.7°C | 4.8°C | -1.1°C | 22.5°C | -11.5°C | 20 mm | 65% | 3.4 m/s | 2.3 |
| 2015 | 12.1°C | 6.3°C | 0.5°C | 20.2°C | -10.3°C | 98 mm | 82% | 3.3 m/s | 2.5 |
| 2014 | 10.5°C | 6.2°C | 1.8°C | 19.9°C | -6.8°C | 24 mm | 78% | 3 m/s | 1.7 |
| 2013 | 7.7°C | 2.1°C | -3.4°C | 18.9°C | -12.6°C | 34 mm | 75% | 3 m/s | 2.3 |
| 2012 | 12.4°C | 6.5°C | 0.6°C | 25.7°C | -7.5°C | 20 mm | 61% | 3.5 m/s | 2.5 |
| 2011 | 10.6°C | 5.1°C | -0.4°C | 20.1°C | -6.3°C | 40 mm | 74% | 2.9 m/s | 2.2 |
| 2010 | 11.0°C | 4.8°C | -1.3°C | 22.1°C | -6.2°C | 14 mm | 66% | 3.1 m/s | 2.5 |
| 2009 | 6.7°C | 1.3°C | -4.0°C | 16.5°C | -12.5°C | 50 mm | 79% | 3.3 m/s | 2.3 |
| 2008 | 10.5°C | 4.2°C | -2.1°C | 23.5°C | -9.5°C | 20 mm | 62% | 4.1 m/s | 2.5 |
| 2007 | 9.3°C | 3.7°C | -1.9°C | 19.2°C | -5.9°C | 68 mm | 79% | 3 m/s | 2.1 |
| 2006 | 11.4°C | 5.7°C | -0.1°C | 20.7°C | -9.9°C | 73 mm | 73% | 3.4 m/s | 2.7 |
| 2005 | 10.9°C | 4.7°C | -1.6°C | 21.3°C | -11.3°C | 5 mm | 60% | 3.2 m/s | 2.7 |
| 2004 | 11.4°C | 5.6°C | -0.3°C | 20.1°C | -10.8°C | 18 mm | 75% | 3.3 m/s | 2.8 |
| 2003 | 12.7°C | 6.2°C | -0.3°C | 19.8°C | -5.4°C | 24 mm | 66% | 3.9 m/s | 2.6 |
| 2002 | 9.9°C | 4.4°C | -1.1°C | 19.4°C | -12.4°C | 77 mm | 80% | 3.1 m/s | 2.3 |
| 2001 | 12.1°C | 6.5°C | 0.8°C | 23.8°C | -6.1°C | 49 mm | 68% | 3.1 m/s | 2.5 |
| 2000 | 3.8°C | -0.7°C | -5.1°C | 13.6°C | -10.5°C | 52 mm | 83% | 3.1 m/s | 2.4 |
| 1999 | 13.3°C | 6.6°C | -0.1°C | 21.2°C | -4.9°C | 78 mm | 68% | 3.4 m/s | 2.7 |
| 1998 | 10.8°C | 5.1°C | -0.5°C | 22.5°C | -10.0°C | 44 mm | 74% | 3 m/s | 2.5 |
| 1997 | 8.2°C | 3.2°C | -1.9°C | 16.7°C | -8.5°C | 107 mm | 80% | 3.1 m/s | 2.3 |
| 1996 | 10.9°C | 4.7°C | -1.5°C | 20.7°C | -12.1°C | 4 mm | 76% | 3.4 m/s | 2.7 |
| 1995 | 9.7°C | 4.2°C | -1.2°C | 21.1°C | -9.4°C | 62 mm | 75% | 3 m/s | 2.4 |
| 1994 | 11.6°C | 6.3°C | 0.9°C | 20.5°C | -6.1°C | 29 mm | 82% | 2.6 m/s | 2 |
| 1993 | 11.1°C | 5.4°C | -0.3°C | 18.9°C | -5.5°C | 62 mm | 72% | 3.3 m/s | 2.5 |
| 1992 | 9.3°C | 4.3°C | -0.8°C | 20.8°C | -6.9°C | 95 mm | 83% | 3.2 m/s | 1.9 |
| 1991 | 9.8°C | 5.4°C | 1.1°C | 18.7°C | -5.7°C | 149 mm | 84% | 3 m/s | 2.2 |
| 1990 | 8.1°C | 2.5°C | -3.1°C | 17.5°C | -14.6°C | 45 mm | 74% | 3.4 m/s | 2.4 |
| 1989 | 5.8°C | -0.1°C | -5.9°C | 19.9°C | -20.9°C | 6 mm | 65% | 3.1 m/s | 2.7 |
| 1988 | 12.3°C | 5.8°C | -0.6°C | 19.5°C | -6.4°C | 43 mm | 68% | 3.1 m/s | 2.5 |
| 1987 | 9.0°C | 3.5°C | -2.0°C | 18.4°C | -12.4°C | 125 mm | 80% | 3.3 m/s | 2.1 |
| 1986 | 9.0°C | 4.1°C | -0.7°C | 13.9°C | -4.5°C | 34 mm | 85% | 2.4 m/s | 2.2 |
| 1985 | 7.2°C | 1.8°C | -3.7°C | 18.7°C | -9.3°C | 11 mm | 76% | 3.1 m/s | 2.7 |
| 1984 🌧️ | 11.2°C | 6.1°C | 0.9°C | 21.6°C | -8.2°C | 204 mm | 83% | 3.5 m/s | 1.8 |
| 1983 ❄️ | 2.4°C | -2.5°C | -7.5°C | 16.2°C | -17.1°C | 16 mm | 76% | 3.4 m/s | — |
| 1982 | 10.6°C | 5.3°C | 0.0°C | 20.6°C | -7.9°C | 61 mm | 74% | 3.2 m/s | — |
| 1981 | 9.1°C | 4.0°C | -1.0°C | 18.3°C | -6.9°C | 6 mm | 77% | 3.1 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 10.4°C with lows near -0.8°C (mean 4.8°C), based on 45 years of NASA POWER data.
December averages 50 mm of rainfall in Norman, one of the drier months. The wettest on record was 204 mm in 1984.
The hottest December reached 26.2°C in 2025. 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 5.2°C. Daytime highs moved from 8.1°C to 14.1°C and overnight lows from -2.3°C to 2.1°C over the same span.
December is one of the cooler months of the year in Norman and one of the drier months, so plan for around 10.4°C daytime highs and -0.8°C at night.
Not quite — December is the 2nd coolest month in Norman, averaging 4.8°C.
For December in Norman, pack warm layers and a jacket for chilly mornings, with typical highs of 10.4°C and lows of -0.8°C.
Relative humidity in December averages 74% — moderately humid.
Average wind speed in December is 3.2 m/s. The windiest December on record averaged 4.1 m/s (2008).
The wettest December on record was 1984 with 204 mm. On average, December sees 50 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 Norman 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.
