Climate averages 1991–2020
San Luis Río Colorado weather
in December.
A mild, very dry month: the coolest and the joint 7th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a mild month in San Luis Río Colorado: daytime highs average 19.9°C and nights cool to about 8.1°C. By daytime temperature it is the coolest month of the year.
Expect about 9.2 mm of rain on roughly 2 days, which makes December a very dry month (the joint 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 04 min on an average December day.
The nearest other city in this atlas is Yuma (33 km away). In December its highs average 20.0°C, about as warm as San Luis Río Colorado, with 10 mm of rain.
Among the 153 cities listed in Mexico, San Luis Río Colorado ranks joint 122nd of 153 for the warmest December highs and joint 58th of 153 for the driest December (rainfall, lowest first). The mean December high of those 153 cities is 22.7°C; San Luis Río Colorado is 2.8°C cooler than that mean.
From December to January, average highs rise by 1.1°C to 21.0°C, and monthly rainfall stays at 9.2 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
San Luis Río Colorado climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 21.0°C8.6°C | 8.6°C | 9.2 | 1.5 | 10.310 h |
| February | 22.9°C9.9°C | 9.9°C | 13 | 2.3 | 11.011 h |
| March | 26.7°C12.5°C | 12.5°C | 10 | 1.5 | 12.012 h |
| April | 30.3°C15.3°C | 15.3°C | 3.0 | 0.6 | 13.013 h |
| May | 34.5°C18.9°C | 18.9°C | 0.7 | 0.2 | 13.814 h |
| June | 39.3°C23.1°C | 23.1°C | 0.6 | 0.2 | 14.214 h |
| July | 41.2°C27.4°C | 27.4°C | 4.8 | 1.5 | 14.114 h |
| August | 40.8°C28.0°C | 28.0°C | 11 | 2.9 | 13.313 h |
| September | 37.9°C24.8°C | 24.8°C | 13 | 2.2 | 12.412 h |
| October | 32.0°C18.5°C | 18.5°C | 4.9 | 0.9 | 11.411 h |
| November | 25.2°C12.5°C | 12.5°C | 5.5 | 0.8 | 10.511 h |
| December, selected | 19.9°C8.1°C | 8.1°C | 9.2 | 1.7 | 10.110 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
- Yuma in DecemberUnited States · 33 kmHigh 20.0°C · Low 8.1°C · 10 mm rain
- Mexicali in DecemberMexico · 67 kmHigh 19.8°C · Low 9.3°C · 9.1 mm rain
- Ensenada in DecemberMexico · 184 kmHigh 18.5°C · Low 9.1°C · 45 mm rain
- Indio in DecemberUnited States · 195 kmHigh 18.9°C · Low 9.1°C · 25 mm rain
- El Cajon in DecemberUnited States · 209 kmHigh 17.7°C · Low 7.9°C · 47 mm rain
- Tijuana in DecemberMexico · 210 kmHigh 16.8°C · Low 9.0°C · 51 mm rain
- Rosarito in DecemberMexico · 214 kmHigh 17.1°C · Low 9.9°C · 44 mm rain
- Chula Vista in DecemberUnited States · 218 kmHigh 17.0°C · Low 9.4°C · 47 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 San Luis Río Colorado) is explained once on the San Luis Río Colorado year overview and on the Sources, method and limits page.