San Luis Río Colorado weather in July

In July, San Luis Río Colorado sees average daytime highs of 41°C and overnight lows near 28°C, with 5 mm of rain across 1.5 wet days and about 13.9 hours of daylight. It is the 1st-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 41°C through the month. The sky is clear or mostly clear about 79% of the time in July, and the air most often feels humid.

Daylight stretches from about 14 h 06 min at the start of July to 13 h 36 min by month's end. Set against the rest of the year, July is San Luis Río Colorado's 7th-clearest and 1st-windiest month. For the whole year in context, see San Luis Río Colorado's year-round climate.

Daytime high
41°
1st warmest
Overnight low
28°
11th coldest
Rainfall
5 mm
1.5 wet days
Daylight
13 h 54 min
5:47 AM – 7:43 PM
Cloud cover
22%
7th clearest
Wind
11 km/h
1st windiest
Solar energy
7.79 kWh/m²
Travel score
0.0
out of 10

San Luis Río Colorado is municipal seat of San Luis, State of Sonora, Mexico.

Founded
1918

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 41°C through the month.

A typical July day in San Luis Río Colorado reaches about 41°C in the afternoon and slips back to 28°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 38°C and 44°C. Set against its neighbours, July runs about 2°C warmer than June and on par with August.

20°25°30°35°40°45°151015202531
Avg high (°C)Avg low (°C)
14127
24127
34127
44127
54127
64127
74128
84128
94128
104128
114128
124128
134128
144128
154128
164128
174128
184128
194129
204129
214129
224129
234129
244129
254129
264129
274129
284129
294129
304129
314129

How July really feels in San Luis Río Colorado

Once humidity and wind are folded in, July 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 July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

San Luis Río Colorado weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 10°91.510.18.4
Feb24° / 11°132.310.88.6
Mar27° / 13°101.511.88.1
Apr31° / 16°30.612.86.1
May35° / 20°10.213.63.5
Jun39° / 24°10.214.10.7
Jul41° / 28°51.513.90.0
Aug41° / 29°112.913.20.0
Sep38° / 25°132.212.21.2
Oct33° / 19°50.911.24.9
Nov26° / 13°60.810.38.6
Dec21° / 91.79.98.2

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 79% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 9% of July, with mostly cloudy or overcast conditions the remaining 12%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1928
2928
3928
4928
5928
6919
7919
89010
99010
109010
119010
129010
138911
148911
158911
168911
178911
188713
198713
208713
218614
228614
238614
248614
258515
268515
278515
288515
298515
308515
318614

Chance of precipitation in July

Any precipitation

San Luis Río Colorado gets around 5 mm of rain over 1.5 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 5% and peaks near 7% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
13
23
33
44
54
64
75
85
95
105
115
125
135
145
155
165
175
185
195
205
215
225
235
245
255
266
276
286
296
306
317

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the humid band about 27% of days. Sticky, muggy-or-worse air turns up on roughly 28% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1511720102
2481821112
3451822123
4431823133
5401824143
6381925154
7361926164
8341926164
9322027174
10312027184
11292028185
12282028195
13272128195
14252129205
15242129215
16232129225
17222030235
18212030245
19202030255
20192030266
21181930276
22171930287
23161929297
24151929308
25141828318
26141828329
27131827329
28131827339
291318263310
301418263310
311417263210

Wind in July

Winds average 11 km/h in July, the windiest month of the year.

Across July, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 14 h 06 min at the start of July to 13 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over July. Sunrise moves from 5:39 AM to 5:56 AM, and sunset from 7:46 PM to 7:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:397:46
214.15:407:46
314.15:407:46
414.15:407:46
514.15:417:45
614.15:417:45
714.15:427:45
814.05:427:45
914.05:437:45
1014.05:437:45
1114.05:447:44
1214.05:447:44
1314.05:457:44
1414.05:457:44
1514.05:467:43
1613.95:477:43
1713.95:477:42
1813.95:487:42
1913.95:487:42
2013.95:497:41
2113.95:507:41
2213.85:507:40
2313.85:517:40
2413.85:517:39
2513.85:527:38
2613.85:537:38
2713.75:537:37
2813.75:547:36
2913.75:557:36
3013.75:557:35
3113.65:567:34

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 7.79 kWh/m².

For context, solar energy here swings from a low near 3.4 kWh/m² to a high of 8.49 kWh/m² in June across the year — July's 7.79 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
18.2Intense
28.2Intense
38.2Intense
48.1Intense
58.1Intense
68.1Intense
78.0Intense
88.0Intense
98.0Intense
108.0Intense
117.9Intense
127.9Intense
137.9Intense
147.8Intense
157.8Intense
167.8Intense
177.8Intense
187.8Intense
197.7Intense
207.7Intense
217.7Intense
227.7Intense
237.6Intense
247.6Intense
257.6Intense
267.5Intense
277.5Intense
287.5Intense
297.5Intense
307.5Intense
317.5Intense
Planning a trip in July

Is July a good time to visit San Luis Río Colorado?

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

0.0
Sightseeing
11th-best month of the year
2.2
Beach & pool
12th-best month of the year

July is a weaker month for outdoor sightseeing in San Luis Río Colorado.

What to pack for San Luis Río Colorado in July

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

In July, San Luis Río Colorado sees daytime highs around 41°C and nights near 28°C. Pack light clothes and sun protection.

light clothessun protection

UV index in San Luis Río Colorado in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July 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 San Luis Río Colorado peaks around June 23 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highExtremeVery highHighModerateJun 23UV 11Dec 18UV 3
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar5Moderate
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate
Location & terrain

Where is San Luis Río Colorado?

San Luis Río Colorado sits at 32.5°N, 114.8°W, 36 m above sea level, in Mexico. The nearest listed city is San Luis, 4.0 km away.

Topography around San Luis Río Colorado

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Luis Río Colorado.

Within 3 km, the terrain around San Luis Río Colorado has only modest variations in elevation — a maximum elevation change of 24 m around an average of 44 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 53 m; within 80 km, large variations in elevation — a maximum elevation change of 1,108 m.

The land around San Luis Río Colorado is covered by artificial surfaces (83%) within 3 km, bare terrain (56%) and cropland (32%) within 16 km, and bare terrain (73%) within 80 km.

3 km
24 m
16 km
53 m
80 km
1,108 m
treesshrubscroplandartificial surfacesbare terrainwaterwetland
July weather nearby: San Luis 4.0 km · Somerton 17 km · Yuma 33 km · Ciudad Guadalupe Victoria 36 km · Fortuna Foothills 40 km · Puebla 56 km · Mexicali 67 km · Calexico 73 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 San Luis Río Colorado (32.4555°, -114.7704°, elevation 36 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).