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San Luis Río Colorado, Sonora climate
BWh Hot desert
San Luis Río Colorado has a seasonal warm-temperate climate (Hot desert, Köppen BWh). The hottest month is August with an average daily high near 108°F, while the coldest is December averaging around 43°F at night. Precipitation totals about 2 inches a year and is strongly seasonal — December alone averages 0.5 inches while June barely receives 0.02 inches.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)San Luis Río Colorado climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 70 | 74 | 81 | 87 | 96 | 105 | 108 | 108 | 103 | 92 | 79 | 68 |
| Avg temp (°F) | 57 | 60 | 66 | 71 | 80 | 87 | 93 | 93 | 87 | 76 | 64 | 56 |
| Avg low (°F) | 44 | 46 | 50 | 55 | 63 | 70 | 78 | 78 | 72 | 60 | 50 | 43 |
| Precipitation (in) | 0.3 | 0.3 | 0.3 | 0.1 | 0.0 | 0.0 | 0.2 | 0.2 | 0.2 | 0.1 | 0.2 | 0.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 70 | 74 | 81 | 87 | 96 | 105 |
| Avg temp (°F) | 57 | 60 | 66 | 71 | 80 | 87 |
| Avg low (°F) | 44 | 46 | 50 | 55 | 63 | 70 |
| Precipitation (in) | 0.3 | 0.3 | 0.3 | 0.1 | 0.0 | 0.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 108 | 108 | 103 | 92 | 79 | 68 |
| Avg temp (°F) | 93 | 93 | 87 | 76 | 64 | 56 |
| Avg low (°F) | 78 | 78 | 72 | 60 | 50 | 43 |
| Precipitation (in) | 0.2 | 0.2 | 0.2 | 0.1 | 0.2 | 0.5 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 42 | 43 | 38 | 32 | 28 | 25 | 35 | 34 | 29 | 30 | 35 | 40 |
| Relative humidity (%) | 47 | 46 | 41 | 34 | 30 | 26 | 30 | 33 | 32 | 32 | 36 | 45 |
| Wind speed (mph) | 4.0 | 4.0 | 4.1 | 4.7 | 4.7 | 4.6 | 5.1 | 5.0 | 4.2 | 4.0 | 4.0 | 4.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 42 | 43 | 38 | 32 | 28 | 25 |
| Relative humidity (%) | 47 | 46 | 41 | 34 | 30 | 26 |
| Wind speed (mph) | 4.0 | 4.0 | 4.1 | 4.7 | 4.7 | 4.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 35 | 34 | 29 | 30 | 35 | 40 |
| Relative humidity (%) | 30 | 33 | 32 | 32 | 36 | 45 |
| Wind speed (mph) | 5.1 | 5.0 | 4.2 | 4.0 | 4.0 | 4.1 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from CONAGUA / SMN, Mexico's national weather service, measured at Presa Morelos, about 29 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.