San Luis Río Colorado weather in August

In August, San Luis Río Colorado sees average daytime highs of 41°C and overnight lows near 29°C, with 11 mm of rain across 2.9 wet days and about 13.2 hours of daylight. It is the 2nd-warmest and 3rd-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 81% of the time in August, and the air most often feels muggy.

Daylight stretches from about 13 h 36 min at the start of August to 12 h 42 min by month's end. Set against the rest of the year, August is San Luis Río Colorado's 6th-clearest and 3rd-windiest month. For the whole year in context, see San Luis Río Colorado's year-round climate.

Daytime high
41°
2nd warmest
Overnight low
29°
12th coldest
Rainfall
11 mm
2.9 wet days
Daylight
13 h 12 min
6:07 AM – 7:19 PM
Cloud cover
21%
6th clearest
Wind
10 km/h
3rd windiest
Solar energy
7.12 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 August

Average highAverage lowShaded bands: 10–90% of days

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

A typical August day in San Luis Río Colorado reaches about 41°C in the afternoon and slips back to 29°C overnight — a 12°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, August runs on par with July and about 3°C warmer than September.

25°30°35°40°45°151015202531
Avg high (°C)Avg low (°C)
14129
24129
34129
44129
54129
64129
74129
84129
94129
104129
114129
124129
134129
144129
154129
164129
174129
184129
194129
204129
214129
224129
234129
244129
254128
264128
274028
284028
294028
304028
314028

How August really feels in San Luis Río Colorado

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.

San Luis Río Colorado weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 3rd-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 August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 81% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 10% of August, with mostly cloudy or overcast conditions the remaining 9%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18713
28713
38713
48812
58911
68911
79010
89010
9919
10928
11928
12928
13937
14937
15937
16937
17937
18937
19937
20937
21937
22937
23937
24937
25937
26928
27928
28928
29928
30928
31928

Chance of precipitation in August

Any precipitation

San Luis Río Colorado gets around 11 mm of rain over 2.9 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 9% and peaks near 12% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
17
27
37
48
58
68
78
88
98
108
118
128
138
148
158
168
178
189
199
209
219
2210
2310
2410
2511
2611
2711
2811
2912
3012
3112

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 32% of days. Sticky, muggy-or-worse air turns up on roughly 50% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
114172532110
214172532120
314172432120
415172432130
515172432130
615162332130
715162332140
815162332140
915152333140
1015152332151
1115142333151
1214142233161
1314132234161
1414132234171
1513122234171
1613122234171
1713122234181
1813122234181
1913112234182
2013112233182
2113112233182
2214112233192
2314112232192
2414112232193
2515102231193
2615102231193
2715102231193
2816102131193
2916102131203
3017102130203
311792030203

Wind in August

Winds average 10 km/h in August.

Across August, 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
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 36 min at the start of August to 12 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 54 minutes over August. Sunrise moves from 5:57 AM to 6:17 AM, and sunset from 7:33 PM to 7:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:577:33
213.65:577:33
313.65:587:32
413.55:597:31
513.56:007:30
613.56:007:29
713.56:017:28
813.46:027:27
913.46:027:26
1013.46:037:26
1113.36:047:25
1213.36:047:24
1313.36:057:22
1413.36:067:21
1513.26:067:20
1613.26:077:19
1713.26:087:18
1813.16:087:17
1913.16:097:16
2013.16:107:15
2113.16:107:14
2213.06:117:12
2313.06:127:11
2413.06:127:10
2512.96:137:09
2612.96:147:08
2712.96:147:06
2812.86:157:05
2912.86:167:04
3012.86:167:02
3112.76:177:01

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 7.12 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 — August's 7.12 kWh/m² falls in the middle.

02468151015202531
Solar energy (kWh/m²)Level
17.4Intense
27.4Intense
37.4Intense
47.4Intense
57.4Intense
67.4Intense
77.3Intense
87.3Intense
97.3Intense
107.3Intense
117.3Intense
127.2Intense
137.2Intense
147.2Intense
157.2Intense
167.1Intense
177.1Intense
187.1Intense
197.0Intense
207.0Intense
217.0Intense
226.9Intense
236.9Intense
246.9Intense
256.8Intense
266.8Intense
276.8Intense
286.8Intense
296.7Intense
306.7Intense
316.7Intense
Planning a trip in August

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

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

0.0
Sightseeing
11th-best month of the year
2.4
Beach & pool
11th-best month of the year

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

What to pack for San Luis Río Colorado in August

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

In August, San Luis Río Colorado sees daytime highs around 41°C and nights near 29°C. Pack light clothes and sun protection.

light clothessun protection

UV index in San Luis Río Colorado in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 10 (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
August 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).