Hermosillo weather in August

In August, Hermosillo sees average daytime highs of 38°C and overnight lows near 27°C, with 51 mm of rain across 9.8 wet days and about 13 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 38°C through the month. The sky is clear or mostly clear about 50% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 24 min at the start of August to 12 h 36 min by month's end. Set against the rest of the year, August is Hermosillo's 11th-clearest and 12th-windiest month. For the whole year in context, see Hermosillo's year-round climate.

Daytime high
38°
3rd warmest
Overnight low
27°
11th coldest
Rainfall
51 mm
9.8 wet days
Daylight
13 h 06 min
5:56 AM – 7:00 PM
Cloud cover
44%
11th clearest
Wind
8 km/h
12th windiest
Solar energy
6.55 kWh/m²
Travel score
1.2
out of 10

Hermosillo is city in Mexico, Sonora state capital.

Founded
1700

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 38°C through the month.

A typical August day in Hermosillo reaches about 38°C in the afternoon and slips back to 27°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 34°C and 41°C. Set against its neighbours, August runs about 1°C cooler than July and about 1°C warmer than September.

20°25°30°35°40°45°151015202531
Avg high (°C)Avg low (°C)
13827
23827
33827
43827
53827
63827
73827
83827
93827
103827
113827
123827
133827
143827
153827
163827
173827
183827
193827
203827
213727
223727
233727
243726
253726
263726
273726
283726
293726
303726
313726

How August really feels in Hermosillo

Once humidity and wind are folded in, August averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
31
31 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Hermosillo weather by month

How August compares with the rest of the year at a glance. August is the 3rd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 121.610.38.9
Feb26° / 10°152118.4
Mar29° / 12°70.911.87.3
Apr32° / 15°10.412.75.3
May36° / 18°00.113.43.0
Jun39° / 24°31.113.80.7
Jul39° / 27°407.613.70.8
Aug38° / 27°519.8131.2
Sep37° / 25°527.112.22.0
Oct34° / 19°192.111.34.1
Nov28° / 13°131.510.57.4
Dec24° / 191.910.28.7

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 22% of August, with mostly cloudy or overcast conditions the remaining 28%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16931
27030
37030
47228
57228
67327
77327
87426
97426
107426
117327
127327
137327
147228
157228
167129
177129
187129
197129
207030
217030
227030
237030
247129
257228
267228
277327
287426
297426
307525
317723

Chance of precipitation in August

Any precipitation

Hermosillo gets around 51 mm of rain over 9.8 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 32% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
128
229
329
429
530
630
730
830
930
1030
1130
1231
1331
1431
1531
1632
1732
1832
1932
2033
2133
2233
2333
2434
2534
2634
2734
2834
2935
3035
3135

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the oppressive band about 59% of days. Sticky, muggy-or-worse air turns up on roughly 92% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
112729547
212729547
312728548
412727558
502726578
602626579
702625589
802624599
9026235910
10025226110
11025216111
12025206112
13024196312
14024196213
15124186114
16124186114
17124186015
18124176115
19124176016
20124176016
21134165917
22134165917
23134155918
24135155818
25135145819
26135145819
27235145719
28225135820
29225135820
30225125920
31225125920

Wind in August

Winds average 8 km/h in August, the calmest month.

Across August, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 24 min at the start of August to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over August. Sunrise moves from 5:48 AM to 6:05 AM, and sunset from 7:12 PM to 6:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:487:12
213.45:487:11
313.45:497:11
413.35:497:10
513.35:507:09
613.35:517:08
713.35:517:08
813.35:527:07
913.25:527:06
1013.25:537:05
1113.25:547:04
1213.25:547:03
1313.15:557:02
1413.15:557:01
1513.15:567:00
1613.15:567:00
1713.05:576:59
1813.05:586:58
1913.05:586:56
2012.95:596:55
2112.95:596:54
2212.96:006:53
2312.96:006:52
2412.86:016:51
2512.86:016:50
2612.86:026:49
2712.86:036:48
2812.76:036:47
2912.76:046:45
3012.76:046:44
3112.66:056:43

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.55 kWh/m².

For context, solar energy here swings from a low near 3.81 kWh/m² to a high of 8.27 kWh/m² in May across the year — August's 6.55 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.8Intense
46.8Intense
56.8Intense
66.8Intense
76.7Intense
86.7Intense
96.7Intense
106.7Intense
116.7Intense
126.6Intense
136.6Intense
146.6Intense
156.5Intense
166.5Intense
176.5Intense
186.5Intense
196.5Intense
206.4Intense
216.4Intense
226.4Intense
236.3Intense
246.3Intense
256.3Intense
266.3Intense
276.3Intense
286.2Intense
296.2Intense
306.2Intense
316.2Intense
Planning a trip in August

Is August a good time to visit Hermosillo?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

1.2
Sightseeing
10th-best month of the year
4.0
Beach & pool
11th-best month of the year

August is a weaker month for outdoor sightseeing in Hermosillo.

What to pack for Hermosillo in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, Hermosillo sees daytime highs around 38°C and nights near 27°C. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.

light clothessun protectionrain gear

UV index in Hermosillo in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighModerateJul 11UV 12Dec 18UV 4
UV index (midday)Level
Jan5Moderate
Feb6High
Mar8Very high
Apr10Extreme
May10Extreme
Jun12Extreme
Jul12Extreme
Aug11Extreme
Sep10Very high
Oct7High
Nov5High
Dec4Moderate
Location & terrain

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.

EsperanzaCiudad ObregónHeroica Caborca

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.

3 km
142 m
16 km
530 m
80 km
1,508 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
August weather nearby: Miguel Alemán (La Doce) 57 km · San Carlos 126 km · Empalme 126 km · Heroica Guaymas 130 km · Magdalena de Kino 171 km · Esperanza 196 km · Ciudad Obregón 205 km · Heroica Caborca 215 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
Catholic 78%no religion 11%other Evangelical Churches 8%Jehovah Witness 1%

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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).