San Luis Río Colorado weather in October

In October, San Luis Río Colorado sees average daytime highs of 33°C and overnight lows near 19°C, with 5 mm of rain across 0.9 wet days and about 11.2 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 35°C in the first days to 30°C by the end. The sky is clear or mostly clear about 83% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 42 min at the start of October to 10 h 42 min by month's end. Set against the rest of the year, October is San Luis Río Colorado's 3rd-clearest and 11th-windiest month. For the whole year in context, see San Luis Río Colorado's year-round climate.

Daytime high
33°
6th warmest
Overnight low
19°
7th coldest
Rainfall
5 mm
0.9 wet days
Daylight
11 h 12 min
6:49 AM – 6:00 PM
Cloud cover
16%
3rd clearest
Wind
9 km/h
11th windiest
Solar energy
5.23 kWh/m²
Travel score
4.9
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 October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 35°C in the first days to 30°C by the end.

A typical October day in San Luis Río Colorado reaches about 33°C in the afternoon and slips back to 19°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 37°C. Set against its neighbours, October runs about 6°C cooler than September and about 7°C warmer than November.

10°20°30°40°151015202531
Avg high (°C)Avg low (°C)
13622
23622
33522
43522
53521
63521
73521
83421
93421
103420
113420
123420
133320
143320
153319
163319
173319
183219
193219
203218
213218
223118
233118
243118
253117
263017
273017
283017
293016
302916
312916

How October really feels in San Luis Río Colorado

Once humidity and wind are folded in, October averages 19 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
19
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

San Luis Río Colorado weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 8th-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 October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 83% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 7% of October, with mostly cloudy or overcast conditions the remaining 9%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1928
2928
3928
4928
5928
6928
7928
8919
9919
10919
11919
12919
13919
14919
15919
16919
17919
18928
19919
20919
21919
22919
239010
249010
259010
269010
279010
288911
298911
308812
318812

Chance of precipitation in October

Any precipitation

San Luis Río Colorado gets around 5 mm of rain over 0.9 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 3% and peaks near 4% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
14
23
33
43
53
63
73
83
93
103
113
123
133
143
153
163
173
183
193
203
213
223
233
242
252
262
272
282
292
302
312

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the dry band about 80% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
16415993
26515992
36714982
46814882
57013872
67212871
77312861
87411861
97511851
107710850
117810840
127810840
138010730
14819730
15819730
16829720
17829720
18829720
19839710
20839710
21849610
22849610
23859510
24869500
25888400
26888400
27898300
28907300
29907300
30926200
31926200

Wind in October

Winds average 9 km/h in October.

Across October, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 42 min at the start of October to 10 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over October. Sunrise moves from 6:38 AM to 7:01 AM, and sunset from 6:19 PM to 5:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:386:19
211.76:386:17
311.66:396:16
411.66:406:15
511.56:406:13
611.56:416:12
711.56:426:11
811.46:436:09
911.46:436:08
1011.46:446:07
1111.36:456:06
1211.36:456:04
1311.36:466:03
1411.36:476:02
1511.26:486:01
1611.26:496:00
1711.26:495:59
1811.16:505:57
1911.16:515:56
2011.16:525:55
2111.06:535:54
2211.06:535:53
2311.06:545:52
2410.96:555:51
2510.96:565:50
2610.96:575:49
2710.86:585:48
2810.86:585:47
2910.86:595:46
3010.87:005:45
3110.77:015:44

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 5.23 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 — October's 5.23 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.7Bright
55.7Bright
65.7Bright
75.6Bright
85.6Bright
95.5Bright
105.5Bright
115.5Bright
125.4Bright
135.4Bright
145.3Bright
155.3Bright
165.2Bright
175.2Bright
185.2Bright
195.1Bright
205.1Bright
215.0Bright
225.0Bright
234.9Bright
244.9Bright
254.8Bright
264.8Bright
274.8Bright
284.7Bright
294.7Bright
304.6Bright
314.6Bright
Planning a trip in October

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

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

4.9
Sightseeing
7th-best month of the year
8.1
Beach & pool
3rd-best month of the year

October is a reasonable time to visit San Luis Río Colorado for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for San Luis Río Colorado in October

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

In October, San Luis Río Colorado sees daytime highs around 33°C and nights near 19°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in San Luis Río Colorado in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 6 — enough to warrant sun protection. 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
October 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).