Climate averages 1991–2020
Hermosillo weather
in July.
A very hot, moderately wet month: the 2nd warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a very hot month in Hermosillo: daytime highs average 38.3°C and nights cool to about 26.6°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 40 mm of rain on roughly 8 days, which makes July a moderately wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 49 min on an average July day.
The nearest other city in this atlas is Heroica Guaymas (130 km away). In July its highs average 33.8°C, 4.5°C cooler than Hermosillo, with 9.8 mm of rain.
Among the 153 cities listed in Mexico, Hermosillo ranks 3rd of 153 for the warmest July highs and 11th of 153 for the driest July (rainfall, lowest first). The mean July high of those 153 cities is 28.0°C; Hermosillo is 10.4°C warmer than that mean.
From July to August, average highs fall by 0.8°C to 37.6°C, and monthly rainfall rises from 40 mm to 51 mm.
The annual picture
July 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
Hermosillo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 23.8°C9.4°C | 9.4°C | 12 | 1.6 | 10.511 h |
| February | 25.0°C10.3°C | 10.3°C | 15 | 2.0 | 11.111 h |
| March | 28.5°C12.3°C | 12.3°C | 6.5 | 0.8 | 12.012 h |
| April | 31.7°C14.9°C | 14.9°C | 1.4 | 0.4 | 12.813 h |
| May | 35.2°C18.1°C | 18.1°C | 0.4 | 0.1 | 13.614 h |
| June | 39.1°C23.3°C | 23.3°C | 3.3 | 1.1 | 14.014 h |
| July, selected | 38.3°C26.6°C | 26.6°C | 40 | 7.6 | 13.814 h |
| August | 37.6°C26.6°C | 26.6°C | 51 | 9.8 | 13.213 h |
| September | 36.0°C24.5°C | 24.5°C | 52 | 7.1 | 12.412 h |
| October | 33.2°C19.1°C | 19.1°C | 19 | 2.1 | 11.511 h |
| November | 27.9°C13.5°C | 13.5°C | 13 | 1.5 | 10.711 h |
| December | 23.1°C9.4°C | 9.4°C | 19 | 1.9 | 10.310 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
July in nearby cities
- Heroica Guaymas in JulyMexico · 130 kmHigh 33.8°C · Low 28.1°C · 9.8 mm rain
- Ciudad Obregón in JulyMexico · 205 kmHigh 37.3°C · Low 26.6°C · 57 mm rain
- Nogales in JulyMexico · 247 kmHigh 32.6°C · Low 20.4°C · 94 mm rain
- Navojoa in JulyMexico · 270 kmHigh 36.8°C · Low 26.4°C · 64 mm rain
- Agua Prieta in JulyMexico · 284 kmHigh 33.8°C · Low 21.5°C · 50 mm rain
- Tucson in JulyUnited States · 348 kmHigh 36.8°C · Low 25.1°C · 33 mm rain
- Cuauhtémoc in JulyMexico · 407 kmHigh 25.7°C · Low 14.9°C · 119 mm rain
- Los Mochis in JulyMexico · 415 kmHigh 35.1°C · Low 26.6°C · 52 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 Hermosillo) is explained once on the Hermosillo year overview and on the Sources, method and limits page.