Climate averages 1991–2020
Baton Rouge weather
in December.
A mild, wet month: the 11th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a mild month in Baton Rouge: daytime highs average 17.1°C and nights cool to about 8.1°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 112 mm of rain on roughly 9 days, which makes December a wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 13 min on an average December day.
The nearest other city in this atlas is Lafayette (Louisiana), United States (84 km away). In December its highs average 17.3°C, about as warm as Baton Rouge, with 112 mm of rain.
Among the 498 cities listed in the United States, Baton Rouge ranks joint 102nd of 498 for the warmest December highs and joint 435th of 498 for the driest December (rainfall, lowest first). The mean December high of those 498 cities is 10.5°C; Baton Rouge is 6.5°C warmer than that mean.
From December to January, average highs fall by 1.2°C to 15.9°C, and monthly rainfall rises from 112 mm to 124 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
Baton Rouge climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 15.9°C6.9°C | 6.9°C | 124 | 9.4 | 10.410 h |
| February | 18.1°C8.7°C | 8.7°C | 115 | 8.9 | 11.111 h |
| March | 21.4°C11.7°C | 11.7°C | 118 | 9.8 | 12.012 h |
| April | 25.0°C15.2°C | 15.2°C | 115 | 8.8 | 12.913 h |
| May | 28.9°C19.5°C | 19.5°C | 105 | 9.5 | 13.714 h |
| June | 31.3°C22.9°C | 22.9°C | 120 | 13.6 | 14.114 h |
| July | 31.9°C24.1°C | 24.1°C | 132 | 17.0 | 13.914 h |
| August | 32.0°C24.0°C | 24.0°C | 133 | 15.7 | 13.213 h |
| September | 30.1°C21.8°C | 21.8°C | 100 | 10.7 | 12.412 h |
| October | 26.2°C16.7°C | 16.7°C | 86 | 7.6 | 11.511 h |
| November | 20.8°C11.3°C | 11.3°C | 89 | 7.7 | 10.611 h |
| December, selected | 17.1°C8.1°C | 8.1°C | 112 | 9.3 | 10.210 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
- Lafayette (Louisiana), United States in DecemberUnited States · 84 kmHigh 17.3°C · Low 8.5°C · 112 mm rain
- Metairie in DecemberUnited States · 112 kmHigh 17.2°C · Low 10.4°C · 98 mm rain
- New Orleans in DecemberUnited States · 120 kmHigh 17.1°C · Low 10.5°C · 96 mm rain
- Lake Charles in DecemberUnited States · 195 kmHigh 17.1°C · Low 8.2°C · 123 mm rain
- Gulfport in DecemberUnited States · 201 kmHigh 16.2°C · Low 9.5°C · 115 mm rain
- Jackson in DecemberUnited States · 227 kmHigh 14.4°C · Low 4.8°C · 119 mm rain
- Beaumont in DecemberUnited States · 283 kmHigh 17.1°C · Low 8.5°C · 119 mm rain
- Mobile in DecemberUnited States · 302 kmHigh 16.6°C · Low 8.6°C · 115 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 Baton Rouge) is explained once on the Baton Rouge year overview and on the Sources, method and limits page.