Climate averages 1991–2020
Hermosillo weather
in October.
A hot, fairly dry month: the 6th warmest and the joint 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a hot month in Hermosillo: daytime highs average 33.2°C and nights cool to about 19.1°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 19 mm of rain on roughly 2 days, which makes October a fairly dry month (the joint 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 29 min on an average October day.
The nearest other city in this atlas is Heroica Guaymas (130 km away). In October its highs average 30.6°C, 2.6°C cooler than Hermosillo, with 17 mm of rain.
Among the 153 cities listed in Mexico, Hermosillo ranks 6th of 153 for the warmest October highs and 14th of 153 for the driest October (rainfall, lowest first). The mean October high of those 153 cities is 25.7°C; Hermosillo is 7.5°C warmer than that mean.
From October to November, average highs fall by 5.3°C to 27.9°C, and monthly rainfall falls from 19 mm to 13 mm.
The annual picture
October 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 | 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, selected | 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
October in nearby cities
- Heroica Guaymas in OctoberMexico · 130 kmHigh 30.6°C · Low 22.8°C · 17 mm rain
- Ciudad Obregón in OctoberMexico · 205 kmHigh 34.6°C · Low 20.7°C · 26 mm rain
- Nogales in OctoberMexico · 247 kmHigh 26.4°C · Low 11.9°C · 22 mm rain
- Navojoa in OctoberMexico · 270 kmHigh 34.8°C · Low 21.0°C · 31 mm rain
- Agua Prieta in OctoberMexico · 284 kmHigh 26.7°C · Low 12.9°C · 18 mm rain
- Tucson in OctoberUnited States · 348 kmHigh 29.2°C · Low 14.9°C · 14 mm rain
- Cuauhtémoc in OctoberMexico · 407 kmHigh 21.5°C · Low 9.1°C · 20 mm rain
- Los Mochis in OctoberMexico · 415 kmHigh 33.6°C · Low 22.7°C · 26 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.