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Hermosillo, Sonora climate
BWh Hot desert
Hermosillo has a seasonal tropical climate (Hot desert, Köppen BWh). The hottest month is July with an average daily high near 39°C, while the coldest is December averaging around 11°C at night. Precipitation totals about 389 mm a year and is strongly seasonal — August alone averages 101 mm while May barely receives 2 mm.
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)Hermosillo climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 25 | 26 | 29 | 33 | 36 | 40 | 39 | 39 | 38 | 35 | 29 | 24 |
| Avg temp (°C) | 18 | 19 | 22 | 24 | 28 | 32 | 33 | 32 | 31 | 28 | 22 | 17 |
| Avg low (°C) | 11 | 12 | 14 | 16 | 20 | 24 | 26 | 26 | 25 | 20 | 15 | 11 |
| Precipitation (mm) | 13 | 17 | 9 | 3 | 2 | 7 | 98 | 101 | 79 | 18 | 22 | 20 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 25 | 26 | 29 | 33 | 36 | 40 |
| Avg temp (°C) | 18 | 19 | 22 | 24 | 28 | 32 |
| Avg low (°C) | 11 | 12 | 14 | 16 | 20 | 24 |
| Precipitation (mm) | 13 | 17 | 9 | 3 | 2 | 7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 39 | 39 | 38 | 35 | 29 | 24 |
| Avg temp (°C) | 33 | 32 | 31 | 28 | 22 | 17 |
| Avg low (°C) | 26 | 26 | 25 | 20 | 15 | 11 |
| Precipitation (mm) | 98 | 101 | 79 | 18 | 22 | 20 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 35 | 39 | 33 | 26 | 19 | 24 | 59 | 54 | 35 | 24 | 30 | 34 |
| Relative humidity (%) | 44 | 43 | 37 | 31 | 29 | 31 | 52 | 59 | 57 | 45 | 42 | 45 |
| Wind speed (mph) | 4.9 | 4.9 | 5.3 | 5.8 | 6.1 | 6.5 | 5.4 | 4.4 | 4.5 | 4.6 | 4.8 | 5.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 35 | 39 | 33 | 26 | 19 | 24 |
| Relative humidity (%) | 44 | 43 | 37 | 31 | 29 | 31 |
| Wind speed (mph) | 4.9 | 4.9 | 5.3 | 5.8 | 6.1 | 6.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 59 | 54 | 35 | 24 | 30 | 34 |
| Relative humidity (%) | 52 | 59 | 57 | 45 | 42 | 45 |
| Wind speed (mph) | 5.4 | 4.4 | 4.5 | 4.6 | 4.8 | 5.0 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from CONAGUA / SMN, Mexico's national weather service, measured at Hermosillo Ii (dge), about 2 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.