December is one of the cooler months of the year in Broken Arrow, with average highs near 9.2°C and lows around -1.3°C (mean 4°C). It is one of the drier months, averaging 71 mm of rainfall and 80% relative humidity across the period.
December is one of the cooler months of the year in Broken Arrow. Across 45 years of records, the warmest December in Broken Arrow was 2021 — when the month averaged 10.5°C — while the coldest was 1983 at -3.7°C. Typical December days reach 9.2°C with nights near -1.3°C. The long-term trend is warming, about 0.9°C per decade.
December is one of the drier months in Broken Arrow, averaging 71 mm of rainfall. The wettest December on record was 2015 with 264 mm, while the driest was 2025 at 2 mm.
Relative humidity in Broken Arrow during December averages 80%. The most humid December was 1992 at 89%, and the least humid was 2005 at 67%.
December receives about 2.2 kWh/m²/day of solar energy in Broken Arrow. The sunniest December was 1989 at 2.7 kWh/m²/day, and the cloudiest was 2014 at 1.5.
Average wind speed in Broken Arrow during December is 2.6 m/s. The windiest December was 2008 at 3.4 m/s, while the calmest was 1986 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 2.1°C | 4.0°C | 3.3°C | 4.6°C | 6.7°C | +4.6°C |
| Avg High | 7.2°C | 9.0°C | 8.6°C | 9.8°C | 12.3°C | +5.1°C |
| Avg Low | -2.9°C | -1.0°C | -2.1°C | -0.6°C | 0.9°C | +3.8°C |
| Avg Rain | 82 mm | 85 mm | 59 mm | 69 mm | 52 mm | -30 mm |
December temperatures in Broken Arrow have risen by about 5.2°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -22.7°C (1989) to a record high of 25.7°C (2025).
Rainfall in December is one of the drier months, averaging 71 mm, with a wettest year of 264 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 1.1°C per decade while lows rose 0.7°C per decade, widening the gap between day and night.
A quieter season to visit Broken Arrow
If your dates are flexible, the more temperate months of September and June tend to be the most comfortable for visiting Broken Arrow. That said, December — with days averaging 9.2°C and nights around -1.3°C (mean 4°C) and moderate rainfall (71 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 | 12.7°C | 6.7°C | 0.6°C | 25.7°C | -7.7°C | 2 mm | 75% | 2.7 m/s | — |
| 2024 | 12.1°C | 7.0°C | 1.8°C | 19.6°C | -4.7°C | 42 mm | 83% | 2.4 m/s | 2.2 |
| 2023 | 12.4°C | 6.9°C | 1.4°C | 21.8°C | -3.7°C | 61 mm | 77% | 2.6 m/s | 2.1 |
| 2022 | 9.4°C | 4.3°C | -0.9°C | 18.7°C | -16.2°C | 69 mm | 77% | 2.8 m/s | 2.1 |
| 2021 🔥 | 16.8°C | 10.5°C | 4.1°C | 24.0°C | -5.6°C | 54 mm | 75% | 2.8 m/s | 2.4 |
| 2020 | 10.3°C | 4.5°C | -1.4°C | 19.2°C | -6.6°C | 83 mm | 80% | 2.4 m/s | 2.2 |
| 2019 | 10.9°C | 5.8°C | 0.6°C | 17.9°C | -4.9°C | 33 mm | 84% | 2.4 m/s | 2.3 |
| 2018 | 10.0°C | 5.0°C | -0.1°C | 17.5°C | -5.4°C | 97 mm | 80% | 2.6 m/s | 2 |
| 2017 | 9.5°C | 4.2°C | -1.0°C | 24.6°C | -12.5°C | 34 mm | 72% | 2.5 m/s | 2.3 |
| 2016 | 9.9°C | 4.1°C | -1.7°C | 23.0°C | -12.2°C | 19 mm | 67% | 2.6 m/s | 2.1 |
| 2015 🌧️ | 12.0°C | 6.4°C | 0.7°C | 20.4°C | -10.7°C | 264 mm | 87% | 2.8 m/s | 2.3 |
| 2014 | 9.1°C | 5.1°C | 1.1°C | 17.8°C | -6.5°C | 59 mm | 83% | 2.3 m/s | 1.5 |
| 2013 | 5.9°C | 0.7°C | -4.4°C | 16.8°C | -14.3°C | 72 mm | 85% | 2.4 m/s | 2 |
| 2012 | 11.7°C | 6.3°C | 0.9°C | 24.3°C | -6.9°C | 37 mm | 71% | 2.8 m/s | 2.3 |
| 2011 | 10.3°C | 5.0°C | -0.3°C | 16.9°C | -6.0°C | 56 mm | 81% | 2.3 m/s | 2.2 |
| 2010 | 8.8°C | 3.3°C | -2.2°C | 20.1°C | -6.9°C | 22 mm | 73% | 2.6 m/s | 2.2 |
| 2009 | 5.5°C | 1.0°C | -3.5°C | 18.0°C | -8.0°C | 45 mm | 84% | 2.7 m/s | 2.1 |
| 2008 | 9.2°C | 3.1°C | -3.0°C | 21.8°C | -12.5°C | 51 mm | 72% | 3.4 m/s | 2.1 |
| 2007 | 8.6°C | 3.3°C | -2.1°C | 18.3°C | -6.2°C | 76 mm | 82% | 2.4 m/s | 1.9 |
| 2006 | 9.6°C | 4.2°C | -1.1°C | 20.8°C | -15.0°C | 101 mm | 85% | 2.7 m/s | 2.3 |
| 2005 | 9.6°C | 3.7°C | -2.2°C | 22.0°C | -9.9°C | 10 mm | 67% | 2.6 m/s | 2.5 |
| 2004 | 9.7°C | 4.4°C | -0.9°C | 20.3°C | -12.2°C | 33 mm | 82% | 2.7 m/s | 2.6 |
| 2003 | 10.7°C | 4.9°C | -0.9°C | 17.2°C | -5.9°C | 52 mm | 77% | 3.1 m/s | 2.3 |
| 2002 | 9.2°C | 4.0°C | -1.2°C | 18.3°C | -11.8°C | 96 mm | 84% | 2.6 m/s | 2.1 |
| 2001 | 10.8°C | 5.7°C | 0.6°C | 22.9°C | -7.6°C | 84 mm | 79% | 2.5 m/s | 2.4 |
| 2000 | 2.9°C | -1.7°C | -6.3°C | 12.6°C | -13.7°C | 42 mm | 82% | 2.6 m/s | 2.3 |
| 1999 | 11.4°C | 5.6°C | -0.3°C | 20.6°C | -5.3°C | 104 mm | 77% | 2.7 m/s | 2.4 |
| 1998 | 9.8°C | 4.7°C | -0.4°C | 22.4°C | -10.1°C | 53 mm | 81% | 2.4 m/s | 2.3 |
| 1997 | 6.8°C | 2.4°C | -2.0°C | 17.3°C | -6.3°C | 113 mm | 87% | 2.3 m/s | 2.1 |
| 1996 | 9.4°C | 4.1°C | -1.1°C | 18.7°C | -12.9°C | 10 mm | 85% | 2.8 m/s | 2.4 |
| 1995 | 8.4°C | 3.4°C | -1.6°C | 22.8°C | -11.2°C | 66 mm | 77% | 2.4 m/s | 2.1 |
| 1994 | 10.3°C | 5.4°C | 0.5°C | 19.2°C | -6.9°C | 48 mm | 88% | 2 m/s | 1.6 |
| 1993 | 9.5°C | 4.4°C | -0.8°C | 20.7°C | -5.9°C | 55 mm | 81% | 2.6 m/s | 2.3 |
| 1992 | 7.7°C | 3.3°C | -1.2°C | 20.7°C | -6.5°C | 161 mm | 89% | 2.5 m/s | 1.7 |
| 1991 | 9.2°C | 4.8°C | 0.4°C | 19.0°C | -9.0°C | 131 mm | 87% | 2.4 m/s | 2 |
| 1990 | 7.3°C | 2.0°C | -3.2°C | 17.9°C | -15.5°C | 112 mm | 82% | 2.7 m/s | 2.1 |
| 1989 | 4.4°C | -1.2°C | -6.7°C | 18.1°C | -22.7°C | 12 mm | 68% | 2.6 m/s | 2.7 |
| 1988 | 10.4°C | 4.4°C | -1.6°C | 16.8°C | -7.5°C | 67 mm | 79% | 2.5 m/s | 2.3 |
| 1987 | 8.2°C | 3.0°C | -2.2°C | 16.2°C | -11.7°C | 193 mm | 88% | 2.6 m/s | 2 |
| 1986 | 8.1°C | 3.8°C | -0.6°C | 11.1°C | -4.9°C | 26 mm | 86% | 1.8 m/s | 2.1 |
| 1985 | 4.1°C | -0.7°C | -5.6°C | 15.5°C | -14.1°C | 53 mm | 86% | 2.5 m/s | 2.4 |
| 1984 | 10.8°C | 5.8°C | 0.9°C | 20.9°C | -10.3°C | 222 mm | 87% | 2.9 m/s | 1.7 |
| 1983 ❄️ | 1.0°C | -3.7°C | -8.3°C | 15.6°C | -19.6°C | 26 mm | 81% | 2.8 m/s | — |
| 1982 | 10.0°C | 5.2°C | 0.4°C | 20.7°C | -7.4°C | 123 mm | 83% | 2.7 m/s | — |
| 1981 | 7.4°C | 2.7°C | -2.0°C | 18.5°C | -10.8°C | 12 mm | 81% | 2.5 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 9.2°C with lows near -1.3°C (mean 4°C), based on 45 years of NASA POWER data.
December averages 71 mm of rainfall in Broken Arrow, one of the drier months. The wettest on record was 264 mm in 2015.
The hottest December reached 25.7°C in 2025. The coldest dipped to -22.7°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 6.7°C to 12.7°C and overnight lows from -2.9°C to 1.4°C over the same span.
December is one of the cooler months of the year in Broken Arrow and one of the drier months, so plan for around 9.2°C daytime highs and -1.3°C at night.
Not quite — December is the 2nd coolest month in Broken Arrow, averaging 4°C.
For December in Broken Arrow, pack warm layers and a jacket for chilly mornings, with typical highs of 9.2°C and lows of -1.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 80% — quite humid.
Average wind speed in December is 2.6 m/s. The windiest December on record averaged 3.4 m/s (2008).
The wettest December on record was 2015 with 264 mm. On average, December sees 71 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 Broken Arrow 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.
