San Luis Río Colorado weather in December
In December, San Luis Río Colorado has daytime highs averaging 20 °C, nights around 8.0 °C, with 1.6 wet days. Figures are 1991–2020 climate normals.
- 20.2°C Average high
- 8.0°C Average low
- 1.6days Wet days
- 10mm Rainfall
- 10h Daylight
Daily temperatures through December
How December develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 December | 21.2 °C | 9.0 °C | 6 % |
| 11–20 December | 20.3 °C | 8.1 °C | 4 % |
| 21–31 December | 19.3 °C | 7.0 °C | 6 % |
- Average highs fall from 21.2 °C early in December to 19.3 °C by the end of it.
What to expect
| Measure | Typical December | Share of the month |
|---|---|---|
| Days above 25 °C | 1.7 of 31 | 5 % |
| Days above 30 °C | 0 of 31 | 0 % |
| Days below 0 °C | 0 of 31 | 0 % |
| Days with more than 1 mm rain | 1.6 of 31 | 5 % |
Conditions in December
| Measure | Average |
|---|---|
| Mean temperature | 14 °C |
| Record high (1991–2020) | 27 °C |
| Record low (1991–2020) | 0.6 °C |
| Relative humidity | 40 % |
| Wind speed | 15 km/h |
| Cloud cover | 32 % |
Where San Luis Río Colorado ranks in December
| Ranking | Position | Value |
|---|---|---|
| The driest places in North America in December | 36thof 50 | 9.9 mm |
| Places with the best weather in North America in December | 39thof 50 | 92/100 |
December compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 21.3 °C | 9 mm | 33 % |
| February | 23.4 °C | 13 mm | 34 % |
| October | 32.6 °C | 5 mm | 16 % |
| November | 25.6 °C | 5 mm | 25 % |
| December | 20.2 °C | 10 mm | 32 % |
See all twelve months for San Luis Río Colorado
- December is the 12th warmest month here.
- It is the 9th driest month of the year.
- It ranks 10th for least cloud cover.
- Days last about 10 hours from sunrise to sunset.
- It rains on 1.6 of 31 days — 5 % of the month.
- Nights are about 12 °C cooler than the middle of the day.
- The hottest December day on record since 1991 reached 27 °C, 7.2 °C above the usual daytime high.
Nearby destinations in December
| Destination | Avg high | Wet days | Sea |
|---|---|---|---|
| San Luis Río Colorado | 20 °C | 1.6 | – |
| Mexicali | 20 °C | 1 | – |
| Ensenada | 18 °C | 5 | 16 |
| Tijuana | 17 °C | 6 | 16 |
| San Diego | 18 °C | 6 | 16 |
| Escondido | 18 °C | 6 | 16 |
QuestionsDecember in San Luis Río Colorado, answered
How warm is San Luis Río Colorado in December?
Daily highs average 20 °C and nights fall to about 8.0 °C, a spread of 12 °C between afternoon and dawn. That makes December the 12th warmest month of the year here.
Does it rain much in San Luis Río Colorado in December?
December averages 10 mm of rain, spread over about 2 of the 31 days — 5 % of the month. Cloud cover averages 32 % of the sky.
How long are the days in December?
San Luis Río Colorado averages 10 hours between sunrise and sunset in December. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.