Hermosillo in Summer
In summer (June, July and August), Hermosillo sees average daytime highs around 38°C and overnight lows near 26°C, with 94 mm of rain over about 19 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 38°C. The sky is clear or mostly clear about 61% of the time across summer, and the air most often feels oppressive.
Summer is Hermosillo's weakest season of the year to visit on our travel score. For the whole year in context, see Hermosillo's year-round climate.
- Avg daytime high
- 38°C
- warmest season of the year
- Avg overnight low
- 26°C
- Rainfall
- 94 mm
- 19 wet days
- Avg wind
- 9 km/h
- Travel score
- 0.9
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Hermosillo in Summer
Across summer, daytime highs hold fairly steady around 38°C.
A typical summer day in Hermosillo reaches about 38°C and drops to 26°C overnight. The warmest of the three months is June, the coolest June.
How summer really feels in Hermosillo
Once humidity and wind are folded in, summer brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Hermosillo weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 24° / 9° | 12 | 1.6 | 10.3 | 8.9 |
| Feb | 26° / 10° | 15 | 2 | 11 | 8.4 |
| Mar | 29° / 12° | 7 | 0.9 | 11.8 | 7.3 |
| Apr | 32° / 15° | 1 | 0.4 | 12.7 | 5.3 |
| May | 36° / 18° | 0 | 0.1 | 13.4 | 3.0 |
| Jun | 39° / 24° | 3 | 1.1 | 13.8 | 0.7 |
| Jul | 39° / 27° | 40 | 7.6 | 13.7 | 0.8 |
| Aug | 38° / 27° | 51 | 9.8 | 13 | 1.2 |
| Sep | 37° / 25° | 52 | 7.1 | 12.2 | 2.0 |
| Oct | 34° / 19° | 19 | 2.1 | 11.3 | 4.1 |
| Nov | 28° / 13° | 13 | 1.5 | 10.5 | 7.4 |
| Dec | 24° / 9° | 19 | 1.9 | 10.2 | 8.7 |
Cloud cover in Summer
The sky is clear or mostly clear about 61% of the time across summer.
Chance of precipitation in Summer
Hermosillo gets around 94 mm of rain over 19 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 9 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 42 min in early June to 12 h 36 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 7.3 kWh/m².
Is summer a good time to visit Hermosillo?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Hermosillo.
What to pack for Hermosillo in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Hermosillo sees daytime highs around 38°C and nights near 26°C. Pack light clothes and sun protection. Worth having: rain gear. About 19 days see rain.
UV index in Hermosillo in Summer
Clear-sky midday UV across summer averages around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Hermosillo peaks around July 11 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 5 | 6 | 8 | 10 | 10 | 12 | 12 | 11 | 10 | 7 | 5 | 4 |
| Level | Moderate | High | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | High | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 5 | Moderate |
| Feb | 6 | High |
| Mar | 8 | Very high |
| Apr | 10 | Extreme |
| May | 10 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 10 | Very high |
| Oct | 7 | High |
| Nov | 5 | High |
| Dec | 4 | Moderate |
Where is Hermosillo?
Hermosillo sits at 29.1°N, 111.0°W, 202 m above sea level, in Mexico. The nearest listed city is Miguel Alemán (La Doce), 57 km away.
Topography around Hermosillo
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Hermosillo.
Within 3 km, the terrain around Hermosillo has only modest variations in elevation — a maximum elevation change of 142 m around an average of 213 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 530 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,508 m.
The land around Hermosillo is covered by artificial surfaces (89%) within 3 km, shrubs (63%) within 16 km, and shrubs (85%) within 80 km.
Mexico travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B
- 120 / 127 V · 60 Hz
- Prices
- ≈ 54% of US
- price level, 2025
- GDP per capita
- $13,889
- 2025
- Happiness
- 7.0 / 10
- World Happiness, 2025
- Safe drinking water
- 43%
- of population, 2024
- Homicide rate
- 24.9
- per 100k, 2023
- Road deaths
- 12.8
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Very low
- EF EPI 440
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Hermosillo (29.0887°, -110.9668°, elevation 202 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.