December is one of the cooler months of the year in Owasso, with average highs near 8.3°C and lows around -1.8°C (mean 3.3°C). It is one of the drier months, averaging 64 mm of rainfall and 80% relative humidity across the period.
December is one of the cooler months of the year in Owasso. Across 45 years of records, the warmest December in Owasso was 2021 — when the month averaged 9.6°C — while the coldest was 1983 at -4.6°C. Typical December days reach 8.3°C with nights near -1.8°C. The long-term trend is warming, about 0.9°C per decade.
December is one of the drier months in Owasso, averaging 64 mm of rainfall. The wettest December on record was 2015 with 222 mm, while the driest was 2025 at 1 mm.
Relative humidity in Owasso during December averages 80%. The most humid December was 1992 at 88%, and the least humid was 2005 at 69%.
December receives about 2.2 kWh/m²/day of solar energy in Owasso. The sunniest December was 1989 at 2.7 kWh/m²/day, and the cloudiest was 2014 at 1.5.
Average wind speed in Owasso during December is 3.1 m/s. The windiest December was 2008 at 4 m/s, while the calmest was 1986 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 1.4°C | 3.3°C | 2.6°C | 4.0°C | 6.0°C | +4.6°C |
| Avg High | 6.3°C | 8.1°C | 7.8°C | 9.0°C | 11.6°C | +5.3°C |
| Avg Low | -3.5°C | -1.5°C | -2.6°C | -1.1°C | 0.4°C | +3.9°C |
| Avg Rain | 75 mm | 79 mm | 58 mm | 56 mm | 43 mm | -32 mm |
December temperatures in Owasso have risen by about 5.4°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -23.5°C (1989) to a record high of 24.3°C (2025).
Rainfall in December is one of the drier months, averaging 64 mm, with a wettest year of 222 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 1.1°C per decade while lows rose 0.8°C per decade, widening the gap between day and night.
A quieter season to visit Owasso
If your dates are flexible, the more temperate months of September and June tend to be the most comfortable for visiting Owasso. That said, December — with days averaging 8.3°C and nights around -1.8°C (mean 3.3°C) and moderate rainfall (64 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 | 11.9°C | 6.0°C | 0.2°C | 24.3°C | -8.0°C | 1 mm | 76% | 3.2 m/s | — |
| 2024 | 11.3°C | 6.3°C | 1.3°C | 17.9°C | -4.6°C | 28 mm | 82% | 2.8 m/s | 2.2 |
| 2023 | 12.0°C | 6.6°C | 1.3°C | 20.8°C | -4.0°C | 56 mm | 77% | 3.1 m/s | 2.1 |
| 2022 | 8.6°C | 3.4°C | -1.8°C | 18.5°C | -17.2°C | 65 mm | 77% | 3.3 m/s | 2.1 |
| 2021 🔥 | 16.0°C | 9.6°C | 3.3°C | 23.5°C | -5.8°C | 41 mm | 74% | 3.3 m/s | 2.4 |
| 2020 | 9.7°C | 4.0°C | -1.8°C | 18.2°C | -6.1°C | 65 mm | 80% | 2.8 m/s | 2.2 |
| 2019 | 10.3°C | 5.3°C | 0.3°C | 17.5°C | -4.6°C | 31 mm | 84% | 3 m/s | 2.3 |
| 2018 | 9.5°C | 4.4°C | -0.7°C | 17.1°C | -5.4°C | 78 mm | 79% | 3.1 m/s | 2 |
| 2017 | 8.8°C | 3.6°C | -1.5°C | 23.9°C | -13.6°C | 24 mm | 72% | 3 m/s | 2.3 |
| 2016 | 8.5°C | 3.0°C | -2.4°C | 22.0°C | -14.0°C | 18 mm | 70% | 3 m/s | 2.1 |
| 2015 🌧️ | 11.4°C | 5.9°C | 0.3°C | 20.2°C | -10.8°C | 222 mm | 86% | 3.3 m/s | 2.3 |
| 2014 | 8.3°C | 4.5°C | 0.6°C | 17.3°C | -7.2°C | 47 mm | 83% | 2.8 m/s | 1.5 |
| 2013 | 5.3°C | 0.5°C | -4.4°C | 15.7°C | -12.8°C | 47 mm | 83% | 2.9 m/s | 2 |
| 2012 | 11.0°C | 5.7°C | 0.5°C | 23.8°C | -7.3°C | 29 mm | 71% | 3.3 m/s | 2.3 |
| 2011 | 9.6°C | 4.4°C | -0.7°C | 16.5°C | -5.8°C | 54 mm | 80% | 2.8 m/s | 2.2 |
| 2010 | 7.7°C | 2.6°C | -2.6°C | 19.7°C | -7.2°C | 15 mm | 74% | 3 m/s | 2.2 |
| 2009 | 4.9°C | 0.4°C | -4.0°C | 17.1°C | -9.6°C | 48 mm | 84% | 3.3 m/s | 2.1 |
| 2008 | 8.0°C | 2.2°C | -3.7°C | 20.9°C | -13.8°C | 56 mm | 75% | 4 m/s | 2.1 |
| 2007 | 7.1°C | 2.1°C | -2.9°C | 17.5°C | -7.6°C | 84 mm | 84% | 2.8 m/s | 1.9 |
| 2006 | 9.2°C | 3.8°C | -1.5°C | 20.7°C | -15.3°C | 92 mm | 85% | 3.2 m/s | 2.3 |
| 2005 | 8.4°C | 2.8°C | -2.8°C | 20.8°C | -11.8°C | 12 mm | 69% | 3 m/s | 2.5 |
| 2004 | 9.1°C | 3.9°C | -1.3°C | 19.5°C | -12.7°C | 34 mm | 82% | 3.2 m/s | 2.6 |
| 2003 | 9.7°C | 4.3°C | -1.2°C | 15.9°C | -6.2°C | 70 mm | 78% | 3.7 m/s | 2.3 |
| 2002 | 8.6°C | 3.6°C | -1.4°C | 17.4°C | -11.6°C | 80 mm | 83% | 3.1 m/s | 2.1 |
| 2001 | 10.4°C | 5.4°C | 0.3°C | 22.9°C | -9.4°C | 66 mm | 77% | 3 m/s | 2.4 |
| 2000 | 2.2°C | -2.5°C | -7.2°C | 12.6°C | -15.3°C | 37 mm | 81% | 3.1 m/s | 2.3 |
| 1999 | 10.4°C | 4.9°C | -0.6°C | 18.6°C | -5.5°C | 121 mm | 78% | 3.1 m/s | 2.4 |
| 1998 | 9.2°C | 4.2°C | -0.9°C | 22.2°C | -11.0°C | 40 mm | 80% | 2.9 m/s | 2.3 |
| 1997 | 6.2°C | 1.8°C | -2.6°C | 16.1°C | -7.8°C | 102 mm | 87% | 2.7 m/s | 2.1 |
| 1996 | 8.0°C | 3.0°C | -1.9°C | 18.0°C | -13.3°C | 6 mm | 85% | 3.2 m/s | 2.4 |
| 1995 | 7.5°C | 2.6°C | -2.4°C | 22.2°C | -11.2°C | 62 mm | 77% | 2.8 m/s | 2.1 |
| 1994 | 9.3°C | 4.7°C | 0.0°C | 18.6°C | -7.0°C | 36 mm | 88% | 2.4 m/s | 1.6 |
| 1993 | 8.7°C | 3.8°C | -1.1°C | 19.0°C | -6.4°C | 47 mm | 81% | 3.1 m/s | 2.3 |
| 1992 | 6.6°C | 2.4°C | -1.7°C | 20.3°C | -6.7°C | 156 mm | 88% | 2.9 m/s | 1.7 |
| 1991 | 8.6°C | 4.4°C | 0.1°C | 18.4°C | -8.9°C | 125 mm | 85% | 2.8 m/s | 2 |
| 1990 | 6.5°C | 1.4°C | -3.7°C | 15.9°C | -15.9°C | 99 mm | 80% | 3.2 m/s | 2.1 |
| 1989 | 3.2°C | -2.1°C | -7.4°C | 16.4°C | -23.5°C | 10 mm | 70% | 3 m/s | 2.7 |
| 1988 | 9.5°C | 3.8°C | -1.9°C | 16.0°C | -7.6°C | 70 mm | 78% | 3.1 m/s | 2.3 |
| 1987 | 7.4°C | 2.4°C | -2.7°C | 15.6°C | -12.1°C | 160 mm | 88% | 3.1 m/s | 2 |
| 1986 | 7.6°C | 3.3°C | -1.0°C | 10.0°C | -4.9°C | 27 mm | 88% | 2.1 m/s | 2.1 |
| 1985 | 3.1°C | -1.7°C | -6.5°C | 13.3°C | -16.7°C | 42 mm | 86% | 2.9 m/s | 2.4 |
| 1984 | 9.7°C | 4.8°C | -0.1°C | 20.6°C | -11.1°C | 213 mm | 87% | 3.5 m/s | 1.7 |
| 1983 ❄️ | 0.1°C | -4.6°C | -9.2°C | 13.8°C | -20.9°C | 27 mm | 82% | 3.2 m/s | — |
| 1982 | 9.1°C | 4.5°C | -0.2°C | 20.3°C | -7.5°C | 108 mm | 82% | 3.2 m/s | — |
| 1981 | 6.6°C | 2.1°C | -2.3°C | 16.3°C | -11.4°C | 14 mm | 80% | 3 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 8.3°C with lows near -1.8°C (mean 3.3°C), based on 45 years of NASA POWER data.
December averages 64 mm of rainfall in Owasso, one of the drier months. The wettest on record was 222 mm in 2015.
The hottest December reached 24.3°C in 2025. The coldest dipped to -23.5°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 5.4°C. Daytime highs moved from 5.7°C to 12°C and overnight lows from -3.7°C to 0.9°C over the same span.
December is one of the cooler months of the year in Owasso and one of the drier months, so plan for around 8.3°C daytime highs and -1.8°C at night.
Not quite — December is the 2nd coolest month in Owasso, averaging 3.3°C.
For December in Owasso, pack warm layers and a jacket for chilly mornings, with typical highs of 8.3°C and lows of -1.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 80% — quite humid.
Average wind speed in December is 3.1 m/s. The windiest December on record averaged 4 m/s (2008).
The wettest December on record was 2015 with 222 mm. On average, December sees 64 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 Owasso 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.
