Climate averages 1991–2020
Mexicali weather
in December.
A mild, very dry month: the coolest and the 10th 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 Mexicali: daytime highs average 19.8°C and nights cool to about 9.3°C. By daytime temperature it is the coolest month of the year.
Expect about 9.1 mm of rain on roughly 2 days, which makes December a very dry month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 03 min on an average December day.
The nearest other city in this atlas is San Luis Río Colorado (67 km away). In December its highs average 19.9°C, about as warm as Mexicali, with 9.2 mm of rain.
Among the 153 cities listed in Mexico, Mexicali ranks joint 124th of 153 for the warmest December highs and 57th of 153 for the driest December (rainfall, lowest first). The mean December high of those 153 cities is 22.7°C; Mexicali is 2.9°C cooler than that mean.
From December to January, average highs rise by 1.1°C to 20.9°C, and monthly rainfall rises from 9.1 mm to 9.4 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
Mexicali climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 20.9°C9.7°C | 9.7°C | 9.4 | 1.7 | 10.310 h |
| February | 22.9°C10.7°C | 10.7°C | 12 | 2.0 | 11.011 h |
| March | 26.9°C12.9°C | 12.9°C | 7.9 | 1.1 | 12.012 h |
| April | 30.6°C15.3°C | 15.3°C | 2.9 | 0.5 | 13.013 h |
| May | 34.9°C18.8°C | 18.8°C | 0.8 | 0.2 | 13.814 h |
| June | 40.0°C23.1°C | 23.1°C | 0.2 | 0.0 | 14.314 h |
| July | 42.1°C27.5°C | 27.5°C | 5.4 | 1.5 | 14.114 h |
| August | 41.6°C27.9°C | 27.9°C | 8.7 | 2.5 | 13.413 h |
| September | 38.3°C24.3°C | 24.3°C | 8.9 | 1.4 | 12.412 h |
| October | 31.9°C18.4°C | 18.4°C | 5.2 | 0.7 | 11.411 h |
| November | 25.0°C13.2°C | 13.2°C | 4.3 | 0.6 | 10.511 h |
| December, selected | 19.8°C9.3°C | 9.3°C | 9.1 | 1.6 | 10.010 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
- San Luis Río Colorado in DecemberMexico · 67 kmHigh 19.9°C · Low 8.1°C · 9.2 mm rain
- Yuma in DecemberUnited States · 78 kmHigh 20.0°C · Low 8.1°C · 10 mm rain
- Ensenada in DecemberMexico · 137 kmHigh 18.5°C · Low 9.1°C · 45 mm rain
- Indio in DecemberUnited States · 141 kmHigh 18.9°C · Low 9.1°C · 25 mm rain
- El Cajon in DecemberUnited States · 142 kmHigh 17.7°C · Low 7.9°C · 47 mm rain
- Tijuana in DecemberMexico · 146 kmHigh 16.8°C · Low 9.0°C · 51 mm rain
- Rosarito in DecemberMexico · 152 kmHigh 17.1°C · Low 9.9°C · 44 mm rain
- Chula Vista in DecemberUnited States · 153 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 Mexicali) is explained once on the Mexicali year overview and on the Sources, method and limits page.