Climate averages 1991–2020
San Luis Río Colorado weather
by month.
See how the year changes. July has the highest average daily maximum; June has the lowest average monthly rainfall.
Pleasant-weather months by our simple rule: JanuaryFebruaryMarchNovemberDecember
Long-term climate patterns, not a forecast for a particular trip.
Across the year San Luis Río Colorado averages a daytime high of 31.0°C and a nighttime low of 17.3°C, with about 85 mm of rain on roughly 16 days. July is the warmest month (average high 41.2°C) and December the coolest (19.9°C). September (tied with February) is the wettest month with 13 mm; June is the driest with under 1 mm.
Months with pleasant weather by a simple rule (average high between 18°C and 29°C, average low of at least 5°C and at most 8 rain days): January, February, March, November and December. This looks at temperature and rain only, not humidity, wind, sea temperature or crowds.
The annual picture
A year in San Luis Río Colorado
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 | 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
Nearby cities
- YumaUnited States · 33 kmHigh 31.4°C · Low 17.4°C · 89 mm rain a year
- MexicaliMexico · 67 kmHigh 31.3°C · Low 17.6°C · 75 mm rain a year
- EnsenadaMexico · 184 kmHigh 22.6°C · Low 14.1°C · 294 mm rain a year
- IndioUnited States · 195 kmHigh 30.2°C · Low 17.6°C · 154 mm rain a year
- El CajonUnited States · 209 kmHigh 22.3°C · Low 12.7°C · 309 mm rain a year
- TijuanaMexico · 210 kmHigh 20.1°C · Low 13.3°C · 333 mm rain a year
- RosaritoMexico · 214 kmHigh 20.3°C · Low 14.0°C · 276 mm rain a year
- Chula VistaUnited States · 218 kmHigh 20.1°C · Low 13.3°C · 309 mm rain a year
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 limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC-7, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at 32.50°, -114.80° (6 km from the city centre). Rain comes from the 0.25° cell at 32.50°, -114.75°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.