Climate averages 1991–2020
Norman weather
in December.
A cool, moderately wet month: the 11th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cool month in Norman: daytime highs average 10.0°C and nights cool to about 1.5°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 48 mm of rain on roughly 5 days, which makes December a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 50 min on an average December day.
The nearest other city in this atlas is Oklahoma City (28 km away). In December its highs average 9.7°C, about as warm as Norman, with 46 mm of rain.
Among the 498 cities listed in the United States, Norman ranks joint 261st of 498 for the warmest December highs and joint 122nd of 498 for the driest December (rainfall, lowest first). The mean December high of those 498 cities is 10.5°C; Norman is 0.5°C cooler than that mean.
From December to January, average highs fall by 0.7°C to 9.3°C, and monthly rainfall falls from 48 mm to 37 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Norman climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.3°C0.1°C | 0.1°C | 37 | 4.7 | 10.110 h |
| February | 12.0°C1.9°C | 1.9°C | 46 | 5.7 | 10.911 h |
| March | 16.8°C6.6°C | 6.6°C | 74 | 7.7 | 11.912 h |
| April | 21.7°C11.3°C | 11.3°C | 100 | 8.6 | 13.113 h |
| May | 26.1°C16.6°C | 16.6°C | 113 | 10.7 | 14.014 h |
| June | 30.7°C21.6°C | 21.6°C | 95 | 9.0 | 14.514 h |
| July | 33.6°C24.1°C | 24.1°C | 55 | 6.2 | 14.314 h |
| August | 33.2°C23.8°C | 23.8°C | 57 | 6.5 | 13.513 h |
| September | 28.6°C19.4°C | 19.4°C | 73 | 6.6 | 12.412 h |
| October | 22.4°C13.1°C | 13.1°C | 76 | 7.0 | 11.311 h |
| November | 15.5°C6.7°C | 6.7°C | 50 | 5.8 | 10.410 h |
| December, selected | 10.0°C1.5°C | 1.5°C | 48 | 5.1 | 9.810 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Oklahoma City in DecemberUnited States · 28 kmHigh 9.7°C · Low 0.6°C · 46 mm rain
- Edmond in DecemberUnited States · 48 kmHigh 9.5°C · Low 0.6°C · 43 mm rain
- Lawton in DecemberUnited States · 110 kmHigh 11.3°C · Low 1.3°C · 47 mm rain
- Tulsa in DecemberUnited States · 167 kmHigh 9.3°C · Low 1.0°C · 57 mm rain
- Wichita Falls in DecemberUnited States · 175 kmHigh 12.9°C · Low 2.7°C · 48 mm rain
- Broken Arrow in DecemberUnited States · 175 kmHigh 9.4°C · Low 1.0°C · 64 mm rain
- Denton in DecemberUnited States · 225 kmHigh 13.1°C · Low 4.4°C · 75 mm rain
- Frisco in DecemberUnited States · 237 kmHigh 13.1°C · Low 4.2°C · 87 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Norman) is explained once on the Norman year overview and on the Sources, method and limits page.