Climate averages 1991–2020
Hermosillo weather
in May.
A very hot, very dry month: the 5th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a very hot month in Hermosillo: daytime highs average 35.2°C and nights cool to about 18.1°C. By daytime temperature it is the 5th warmest of the 12 months.
Rain is very rare: less than 1 mm falls in a typical May (the driest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 35 min on an average May day.
The nearest other city in this atlas is Heroica Guaymas (130 km away). In May its highs average 29.8°C, 5.4°C cooler than Hermosillo, with almost no rain (under 1 mm).
Among the 153 cities listed in Mexico, Hermosillo ranks 10th of 153 for the warmest May highs and joint 3rd of 153 for the driest May (rainfall, lowest first). The mean May high of those 153 cities is 29.6°C; Hermosillo is 5.6°C warmer than that mean.
From May to June, average highs rise by 3.9°C to 39.1°C, and monthly rainfall rises from under 1 mm to 3.3 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Heroica Guaymas in MayMexico · 130 kmHigh 29.8°C · Low 20.8°C · 0.3 mm rain
- Ciudad Obregón in MayMexico · 205 kmHigh 36.0°C · Low 18.7°C · 0.8 mm rain
- Nogales in MayMexico · 247 kmHigh 29.3°C · Low 13.0°C · 4.1 mm rain
- Navojoa in MayMexico · 270 kmHigh 36.3°C · Low 19.1°C · 0.8 mm rain
- Agua Prieta in MayMexico · 284 kmHigh 30.5°C · Low 14.9°C · 4.9 mm rain
- Tucson in MayUnited States · 348 kmHigh 32.4°C · Low 17.2°C · 2.7 mm rain
- Cuauhtémoc in MayMexico · 407 kmHigh 26.6°C · Low 10.7°C · 11 mm rain
- Los Mochis in MayMexico · 415 kmHigh 33.6°C · Low 19.5°C · 0.3 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.