Hermosillo Temperature by Month
The average annual maximum temperature in Hermosillo, Sonora, Mexico is 33°C (91°F), with daytime highs ranging from 25°C (77°F) in December to 40°C (104°F) in June. This page covers monthly averages, day-night differences, and how Hermosillo compares to cities worldwide.
Hermosillo Monthly Temperatures
Depending on the time of the year, temperatures range from very hot to warm in Hermosillo. Nighttime lows follow the same pattern, ranging from 24°C (75°F) to 9°C (48°F).
The chart below illustrates the average maximum day and minimum night temperatures in Hermosillo by month:
The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. June, the city's warmest month, averages 287 hours of sunshine.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
49-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in May
Historical Hermosillo Temperatures: 1976-2026
Browse day-by-day temperature records for Hermosillo spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Hermosillo vs Mexico
The map below shows the annual temperature across Mexico. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Hermosillo vs World: Temperature Compared
Hermosillo's average annual maximum temperature is 33°C (91°F). To put that in context, here's how it compares to a few well-known destinations:
Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.
Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.
Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters — and seasons reversed compared to Europe.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
What Does the Temperature Feel Like in Hermosillo?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In Hermosillo, December is the coolest month, with average highs of 25°C (77°F) and humidity around 48% — considered moderate. In June, the warmest month, temperatures average 40°C (104°F) with 35% humidity — conditions that feel low. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round — large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.
For more on Hermosillo's weather — including monthly rainfall, sunshine hours, and humidity — visit our Hermosillo climate page.
